examples/bench.rs

@@ -25,25 +25,45 @@ fn bench<R>(name: &str, mut f: impl FnMut(u64) -> R) {
 }
 
 fn main() {
-    let items: Vec<Item> = (0..300).map(|i| Item { id: i, size: (1 + i * i) as f64 }).collect();
-    let bounds = Rect { x: 0, y: 0, w: 200, h: 60 };
+    let items: Vec<Item> = (0..300)
+        .map(|i| Item {
+            id: i,
+            size: (1 + i * i) as f64,
+        })
+        .collect();
+    let bounds = Rect {
+        x: 0,
+        y: 0,
+        w: 200,
+        h: 60,
+    };
     bench("treemap/Squarify(300)", |_| {
         black_box(treemap::squarify(black_box(&items), bounds));
     });
     let blocks = treemap::squarify(&items, bounds);
     bench("treemap/Neighbour(300)", |_| {
-        black_box(treemap::neighbour(black_box(&blocks), 150, Direction::Right));
+        black_box(treemap::neighbour(
+            black_box(&blocks),
+            150,
+            Direction::Right,
+        ));
     });
 
     let t0 = Instant::now();
     let tree = Arc::new(RwLock::new(big_tree()));
-    println!("big tree: {} nodes built in {:.2?}", tree.read().unwrap().len(), t0.elapsed());
+    println!(
+        "big tree: {} nodes built in {:.2?}",
+        tree.read().unwrap().len(),
+        t0.elapsed()
+    );
 
     let mut m = BenchModel::new(tree.clone(), 200, 60);
     bench("tui/BigColdFrame", |_| m.cold_frame());
     let mut m = BenchModel::new(tree.clone(), 200, 60);
     m.cold_frame();
-    bench("tui/BigResize", |i| m.resize(150 + (i % 100) as u16, 40 + (i % 30) as u16));
+    bench("tui/BigResize", |i| {
+        m.resize(150 + (i % 100) as u16, 40 + (i % 30) as u16)
+    });
     let mut m = BenchModel::new(tree.clone(), 200, 60);
     m.zoom_to_child_named(b"flat");
     bench("tui/BigFlatDirCold", |_| m.cold_frame());

src/app.rs

@@ -37,16 +37,35 @@ pub struct Config {
 impl Config {
     pub fn new(settings: Settings) -> Config {
         Config {
-            paths: Vec::new(), scan_opts: Default::default(), no_ui: false, json: false, csv: false, depth: -1,
-            top: 0, largest_files: 0, save: String::new(), load: String::new(), compare: None, duplicates: false,
-            read_only: false, theme: settings.theme.clone(), size_mode: SizeMode::Allocated, mouse: settings.mouse,
-            color: "auto".into(), settings,
+            paths: Vec::new(),
+            scan_opts: Default::default(),
+            no_ui: false,
+            json: false,
+            csv: false,
+            depth: -1,
+            top: 0,
+            largest_files: 0,
+            save: String::new(),
+            load: String::new(),
+            compare: None,
+            duplicates: false,
+            read_only: false,
+            theme: settings.theme.clone(),
+            size_mode: SizeMode::Allocated,
+            mouse: settings.mouse,
+            color: "auto".into(),
+            settings,
         }
     }
 
     /// Whether any non-interactive output was requested.
     pub fn report(&self) -> bool {
-        self.no_ui || self.json || self.csv || self.top > 0 || self.largest_files > 0 || self.duplicates
+        self.no_ui
+            || self.json
+            || self.csv
+            || self.top > 0
+            || self.largest_files > 0
+            || self.duplicates
     }
 }
 
@@ -63,9 +82,17 @@ pub fn run(cfg: Config) -> Result<(), Error> {
 
 /// Begins a scan (or loads a snapshot). The scanner is None when the tree
 /// came from a snapshot.
-fn start_source(cancel: Cancel, load: &str, paths: &[String], opts: &scan::Options) -> Result<(Option<Scanner>, Arc<RwLock<Tree>>), Error> {
+fn start_source(
+    cancel: Cancel,
+    load: &str,
+    paths: &[String],
+    opts: &scan::Options,
+) -> Result<(Option<Scanner>, Arc<RwLock<Tree>>), Error> {
     if !load.is_empty() {
-        return Ok((None, Arc::new(RwLock::new(snapshot::load_file(Path::new(load))?))));
+        return Ok((
+            None,
+            Arc::new(RwLock::new(snapshot::load_file(Path::new(load))?)),
+        ));
     }
     let root = paths.first().map_or(".", |s| s.as_str());
     let s = scan::start(root.as_bytes(), opts.clone(), cancel)?;
@@ -117,7 +144,12 @@ fn run_report(cfg: Config) -> Result<(), Error> {
     }
     if cfg.largest_files > 0 {
         let m = cfg.size_mode;
-        let ids = t.top(t.root(), cfg.largest_files, |n| n.kind == Kind::File && n.flags & FLAG_HARDLINK_DUP == 0, |n| n.own(m));
+        let ids = t.top(
+            t.root(),
+            cfg.largest_files,
+            |n| n.kind == Kind::File && n.flags & FLAG_HARDLINK_DUP == 0,
+            |n| n.own(m),
+        );
         export::table(&mut out, &t, &ids, m)?;
         writeln!(out)?;
     }
@@ -162,8 +194,14 @@ fn wait_with_progress(s: &Scanner, cancel: &Cancel) {
 fn run_tui(cfg: Config) -> Result<(), Error> {
     let (load, paths, opts) = (cfg.load.clone(), cfg.paths.clone(), cfg.scan_opts.clone());
     tui::run(tui::Options {
-        read_only: cfg.read_only, theme: cfg.theme, size_mode: cfg.size_mode, mouse: cfg.mouse, color: cfg.color,
-        save: cfg.save, settings: cfg.settings, diff: None,
+        read_only: cfg.read_only,
+        theme: cfg.theme,
+        size_mode: cfg.size_mode,
+        mouse: cfg.mouse,
+        color: cfg.color,
+        save: cfg.save,
+        settings: cfg.settings,
+        diff: None,
         start: Arc::new(move |c| start_source(c, &load, &paths, &opts)),
     })
 }
@@ -176,8 +214,14 @@ fn run_compare(cfg: Config) -> Result<(), Error> {
     if !cfg.report() {
         let tree = Arc::new(RwLock::new(nw));
         return tui::run(tui::Options {
-            read_only: true, theme: cfg.theme, size_mode: cfg.size_mode, mouse: cfg.mouse, color: cfg.color,
-            save: String::new(), settings: cfg.settings, diff: Some(d),
+            read_only: true,
+            theme: cfg.theme,
+            size_mode: cfg.size_mode,
+            mouse: cfg.mouse,
+            color: cfg.color,
+            save: String::new(),
+            settings: cfg.settings,
+            diff: Some(d),
             start: Arc::new(move |_| Ok((None, tree.clone()))),
         });
     }
@@ -185,23 +229,54 @@ fn run_compare(cfg: Config) -> Result<(), Error> {
     let m = cfg.size_mode;
     let mut out = std::io::stdout().lock();
     let (ro, rn) = (d.old.node(0), nw.node(0));
-    writeln!(out, "{} → {}", textutil::sanitize(&d.old.stats.from_snapshot), textutil::sanitize(&nw.stats.from_snapshot))?;
-    writeln!(out, "Total {} → {} ({})\n", textutil::size(ro.total(m)), textutil::size(rn.total(m)), textutil::signed_size(rn.total(m) - ro.total(m)))?;
+    writeln!(
+        out,
+        "{} → {}",
+        textutil::sanitize(&d.old.stats.from_snapshot),
+        textutil::sanitize(&nw.stats.from_snapshot)
+    )?;
+    writeln!(
+        out,
+        "Total {} → {} ({})\n",
+        textutil::size(ro.total(m)),
+        textutil::size(rn.total(m)),
+        textutil::signed_size(rn.total(m) - ro.total(m))
+    )?;
     for c in d.changes(&nw, k, m) {
-        writeln!(out, "{:<10} {:>14}  {}", c.status.name(), textutil::signed_size(c.delta), textutil::sanitize(&c.path))?;
+        writeln!(
+            out,
+            "{:<10} {:>14}  {}",
+            c.status.name(),
+            textutil::signed_size(c.delta),
+            textutil::sanitize(&c.path)
+        )?;
     }
     Ok(())
 }
 
 fn run_duplicates(out: &mut dyn Write, cancel: &Cancel, tree: &RwLock<Tree>) -> Result<(), Error> {
     let f = duplicate::Finder::default();
-    let groups = f.find(cancel, tree, duplicate::Options { min_size: 1, workers: 0 }).ok_or("cancelled")?;
+    let groups = f
+        .find(
+            cancel,
+            tree,
+            duplicate::Options {
+                min_size: 1,
+                workers: 0,
+            },
+        )
+        .ok_or("cancelled")?;
     let t = tree.read().unwrap();
     let mut wasted = 0;
     for g in &groups {
         wasted += g.wasted();
         let h: String = g.hash[..6].iter().map(|b| format!("{b:02x}")).collect();
-        writeln!(out, "{} × {}  (sha256 {h}…)", textutil::size(g.size), g.files.len())?;
+        writeln!(
+            out,
+            "{} × {}  (sha256 {h}…)",
+            textutil::size(g.size),
+            g.files.len()
+        )?;
         for &id in &g.files {
             writeln!(out, "    {}", textutil::sanitize_bytes(&t.path_bytes(id)))?;
         }

src/cancel.rs

@@ -22,7 +22,11 @@ impl Default for Cancel {
 impl Cancel {
     pub fn new() -> Cancel {
         let (tx, rx) = crossbeam_channel::bounded(0);
-        Cancel(Arc::new(Inner { flag: AtomicBool::new(false), tx: Mutex::new(Some(tx)), rx }))
+        Cancel(Arc::new(Inner {
+            flag: AtomicBool::new(false),
+            tx: Mutex::new(Some(tx)),
+            rx,
+        }))
     }
 
     pub fn cancel(&self) {

src/config.rs

@@ -46,7 +46,11 @@ impl Default for Settings {
 
 /// The config file location.
 pub fn path() -> Option<PathBuf> {
-    let env = |k: &str| std::env::var_os(k).filter(|v| !v.is_empty()).map(PathBuf::from);
+    let env = |k: &str| {
+        std::env::var_os(k)
+            .filter(|v| !v.is_empty())
+            .map(PathBuf::from)
+    };
     let dir = if cfg!(target_os = "macos") {
         env("HOME")?.join("Library/Application Support")
     } else {
@@ -57,7 +61,9 @@ pub fn path() -> Option<PathBuf> {
 
 /// Reads the config file if present. A missing file is not an error.
 pub fn load() -> (Settings, Option<String>) {
-    let Some(p) = path() else { return (Settings::default(), None) };
+    let Some(p) = path() else {
+        return (Settings::default(), None);
+    };
     let b = match std::fs::read(&p) {
         Ok(b) => b,
         Err(e) if e.kind() == std::io::ErrorKind::NotFound => return (Settings::default(), None),

src/duplicate.rs

@@ -104,7 +104,11 @@ impl Finder {
             let mut by_size: HashMap<i64, Vec<Cand>> = HashMap::new();
             t.walk(t.root(), |id, n| {
                 if n.kind == Kind::File && !n.has(FLAG_HARDLINK_DUP) && n.size >= o.min_size {
-                    by_size.entry(n.size).or_default().push(Cand { id, path: PathBuf::new(), size: n.size });
+                    by_size.entry(n.size).or_default().push(Cand {
+                        id,
+                        path: PathBuf::new(),
+                        size: n.size,
+                    });
                 }
                 true
             });
@@ -133,11 +137,18 @@ impl Finder {
                 sampled.push(g); // a sample would be the whole file
                 continue;
             }
-            sampled.extend(self.split(cancel, &g, o.workers, sample_hash).into_values().filter(|v| v.len() > 1));
+            sampled.extend(
+                self.split(cancel, &g, o.workers, sample_hash)
+                    .into_values()
+                    .filter(|v| v.len() > 1),
+            );
         }
 
         // Stage 3: full hashes.
-        self.to_hash.store(sampled.iter().map(|g| g[0].size * g.len() as i64).sum(), Ordering::Relaxed);
+        self.to_hash.store(
+            sampled.iter().map(|g| g[0].size * g.len() as i64).sum(),
+            Ordering::Relaxed,
+        );
         self.stage("hashing", |_| {});
         let mut out = Vec::new();
         for g in &sampled {
@@ -148,21 +159,35 @@ impl Finder {
                 if v.len() > 1 {
                     let mut files: Vec<NodeId> = v.iter().map(|c| c.id).collect();
                     files.sort_unstable();
-                    out.push(Group { size: v[0].size, hash, files });
+                    out.push(Group {
+                        size: v[0].size,
+                        hash,
+                        files,
+                    });
                 }
             }
         }
         if cancel.is_cancelled() {
             return None;
         }
-        out.sort_by(|a, b| b.wasted().cmp(&a.wasted()).then(a.files[0].cmp(&b.files[0])));
+        out.sort_by(|a, b| {
+            b.wasted()
+                .cmp(&a.wasted())
+                .then(a.files[0].cmp(&b.files[0]))
+        });
         self.stage("done", |p| p.verified_groups = out.len() as i64);
         Some(out)
     }
 
     /// Hashes every candidate with a bounded pool of reader threads and
     /// buckets the successes by hash. Stops starting new reads once cancelled.
-    fn split(&self, cancel: &Cancel, g: &[Cand], workers: usize, f: HashFn) -> HashMap<[u8; 32], Vec<Cand>> {
+    fn split(
+        &self,
+        cancel: &Cancel,
+        g: &[Cand],
+        workers: usize,
+        f: HashFn,
+    ) -> HashMap<[u8; 32], Vec<Cand>> {
         let next = AtomicUsize::new(0);
         let results = Mutex::new(Vec::with_capacity(g.len()));
         std::thread::scope(|s| {
@@ -244,7 +269,15 @@ mod tests {
     use std::time::Duration;
 
     fn scan(root: &Path, workers: usize) -> Arc<RwLock<Tree>> {
-        let s = scan::start(root.as_os_str().as_bytes(), scan::Options { workers, ..Default::default() }, Cancel::new()).unwrap();
+        let s = scan::start(
+            root.as_os_str().as_bytes(),
+            scan::Options {
+                workers,
+                ..Default::default()
+            },
+            Cancel::new(),
+        )
+        .unwrap();
         s.wait();
         s.tree.clone()
     }
@@ -270,7 +303,11 @@ mod tests {
         assert_eq!(groups.len(), 2);
         let t = tree.read().unwrap();
         let names = |g: &Group| {
-            let mut v: Vec<String> = g.files.iter().map(|&id| t.node(id).name_str().into_owned()).collect();
+            let mut v: Vec<String> = g
+                .files
+                .iter()
+                .map(|&id| t.node(id).name_str().into_owned())
+                .collect();
             v.sort();
             v
         };
@@ -278,7 +315,10 @@ mod tests {
         assert_eq!(groups[0].size, 200_000);
         assert_eq!(names(&groups[1]), ["small1", "small2"], "small group");
         let p = f.progress();
-        assert!(p.candidates == 6 && p.verified_groups == 2, "progress {p:?}");
+        assert!(
+            p.candidates == 6 && p.verified_groups == 2,
+            "progress {p:?}"
+        );
     }
 
     /// A candidate replaced by a FIFO (or a symlink to one) after the scan
@@ -308,8 +348,12 @@ mod tests {
         let f = Arc::new(Finder::default());
         let (tx, rx) = crossbeam_channel::bounded(1);
         let (f2, t2) = (f.clone(), tree.clone());
-        std::thread::spawn(move || tx.send(f2.find(&Cancel::new(), &t2, Options::default()).is_some()));
-        assert!(rx.recv_timeout(Duration::from_secs(5)).expect("duplicate search blocked on a FIFO"));
+        std::thread::spawn(move || {
+            tx.send(f2.find(&Cancel::new(), &t2, Options::default()).is_some())
+        });
+        assert!(rx
+            .recv_timeout(Duration::from_secs(5))
+            .expect("duplicate search blocked on a FIFO"));
         assert_eq!(f.progress().skipped, 2);
     }
 }

src/export.rs

@@ -8,17 +8,27 @@ use std::io::{self, Write};
 use std::time::UNIX_EPOCH;
 
 const FLAG_NAMES: [(Flags, &str); 12] = [
-    (inv::FLAG_HARDLINK_DUP, "hardlink-duplicate"), (inv::FLAG_MOUNT_POINT, "mount-point"),
-    (inv::FLAG_VIRTUAL_FS, "virtual-fs-skipped"), (inv::FLAG_SKIPPED_FS, "other-fs-skipped"),
-    (inv::FLAG_SPARSE, "sparse"), (inv::FLAG_ERROR, "error"), (inv::FLAG_INCOMPLETE, "incomplete"),
-    (inv::FLAG_LOOP, "loop-skipped"), (inv::FLAG_FOLLOWED, "followed-symlink"),
-    (inv::FLAG_ALLOC_UNKNOWN, "allocated-unknown"), (inv::FLAG_BROKEN_LINK, "broken-symlink"),
+    (inv::FLAG_HARDLINK_DUP, "hardlink-duplicate"),
+    (inv::FLAG_MOUNT_POINT, "mount-point"),
+    (inv::FLAG_VIRTUAL_FS, "virtual-fs-skipped"),
+    (inv::FLAG_SKIPPED_FS, "other-fs-skipped"),
+    (inv::FLAG_SPARSE, "sparse"),
+    (inv::FLAG_ERROR, "error"),
+    (inv::FLAG_INCOMPLETE, "incomplete"),
+    (inv::FLAG_LOOP, "loop-skipped"),
+    (inv::FLAG_FOLLOWED, "followed-symlink"),
+    (inv::FLAG_ALLOC_UNKNOWN, "allocated-unknown"),
+    (inv::FLAG_BROKEN_LINK, "broken-symlink"),
     (inv::FLAG_HARDLINKED, "hardlinked"),
 ];
 
 /// Human-readable names for a node's flags.
 pub fn flag_list(f: Flags) -> Vec<&'static str> {
-    FLAG_NAMES.iter().filter(|(b, _)| f & b != 0).map(|(_, n)| *n).collect()
+    FLAG_NAMES
+        .iter()
+        .filter(|(b, _)| f & b != 0)
+        .map(|(_, n)| *n)
+        .collect()
 }
 
 fn kind_name(k: Kind) -> &'static str {
@@ -41,7 +51,10 @@ pub fn json(w: &mut dyn Write, t: &Tree, root: NodeId, max_depth: i64) -> io::Re
         .filter(|(_, &c)| c > 0)
         .map(|(k, &c)| (inv::ErrKind::from_u8(k as u8).name().to_string(), c.into()))
         .collect();
-    let started = st.start.duration_since(UNIX_EPOCH).map_or(0, |d| d.as_nanos() as i64);
+    let started = st
+        .start
+        .duration_since(UNIX_EPOCH)
+        .map_or(0, |d| d.as_nanos() as i64);
     let head = serde_json::json!({
         "generator": format!("{} {}", brand::NAME, brand::VERSION),
         "root": t.path_string(root),
@@ -66,7 +79,14 @@ pub fn json(w: &mut dyn Write, t: &Tree, root: NodeId, max_depth: i64) -> io::Re
 /// proportional to depth, not tree size.
 fn write_node(bw: &mut impl Write, t: &Tree, id: NodeId, depth: i64) -> io::Result<()> {
     let n = t.node(id);
-    write!(bw, "{{\"name\":{},\"type\":\"{}\",\"size\":{},\"allocated\":{}", json_str(&n.name_str()), kind_name(n.kind), n.tot_size, n.tot_alloc)?;
+    write!(
+        bw,
+        "{{\"name\":{},\"type\":\"{}\",\"size\":{},\"allocated\":{}",
+        json_str(&n.name_str()),
+        kind_name(n.kind),
+        n.tot_size,
+        n.tot_alloc
+    )?;
     for (k, v) in [("files", n.files), ("dirs", n.dirs), ("errors", n.errors)] {
         if v != 0 {
             write!(bw, ",\"{k}\":{v}")?;
@@ -83,7 +103,11 @@ fn write_node(bw: &mut impl Write, t: &Tree, id: NodeId, depth: i64) -> io::Resu
         return bw.write_all(b"}");
     }
     bw.write_all(b",\"children\":[")?;
-    for (i, c) in t.sorted_children(id, SizeMode::Allocated).into_iter().enumerate() {
+    for (i, c) in t
+        .sorted_children(id, SizeMode::Allocated)
+        .into_iter()
+        .enumerate()
+    {
         if i > 0 {
             bw.write_all(b",")?;
         }
@@ -107,20 +131,35 @@ pub fn csv(w: &mut dyn Write, t: &Tree, root: NodeId, max_depth: i64) -> io::Res
     bw.write_all(b"path,type,size,allocated,files,dirs,errors,modified,flags\n")?;
     fn rec(bw: &mut impl Write, t: &Tree, id: NodeId, path: &[u8], depth: i64) -> io::Result<()> {
         let n = t.node(id);
-        let modified = if n.mtime != 0 { textutil::rfc3339_utc(n.mtime) } else { String::new() };
+        let modified = if n.mtime != 0 {
+            textutil::rfc3339_utc(n.mtime)
+        } else {
+            String::new()
+        };
         writeln!(
             bw,
             "{},{},{},{},{},{},{},{},{}",
             csv_field(&textutil::sanitize_bytes(path)),
             kind_name(n.kind),
-            n.tot_size, n.tot_alloc, n.files, n.dirs, n.errors, modified,
+            n.tot_size,
+            n.tot_alloc,
+            n.files,
+            n.dirs,
+            n.errors,
+            modified,
             flag_list(n.flags).join("|")
         )?;
         if depth == 0 {
             return Ok(());
         }
         for c in t.sorted_children(id, SizeMode::Allocated) {
-            rec(bw, t, c, &crate::platform::join_path(path, &t.node(c).name), depth - 1)?;
+            rec(
+                bw,
+                t,
+                c,
+                &crate::platform::join_path(path, &t.node(c).name),
+                depth - 1,
+            )?;
         }
         Ok(())
     }
@@ -134,7 +173,11 @@ pub fn table(w: &mut dyn Write, t: &Tree, ids: &[NodeId], m: SizeMode) -> io::Re
     writeln!(w, "{:>12} {:>6} {:>12}  PATH", "SIZE", "%", "FILES")?;
     for &id in ids {
         let n = t.node(id);
-        let files = if n.is_dir() { textutil::count(n.files as i64) } else { String::new() };
+        let files = if n.is_dir() {
+            textutil::count(n.files as i64)
+        } else {
+            String::new()
+        };
         writeln!(
             w,
             "{:>12} {:>6} {:>12}  {}",
@@ -152,30 +195,65 @@ pub fn summary(w: &mut dyn Write, t: &Tree) -> io::Result<()> {
     let st = &t.stats;
     let r = t.node(t.root());
     writeln!(w, "Root            {}", textutil::sanitize_bytes(&st.root))?;
-    writeln!(w, "Files           {}", textutil::count(st.files + st.symlinks + st.others))?;
+    writeln!(
+        w,
+        "Files           {}",
+        textutil::count(st.files + st.symlinks + st.others)
+    )?;
     writeln!(w, "Directories     {}", textutil::count(st.dirs))?;
-    writeln!(w, "Logical size    {} ({} bytes)", textutil::size(r.tot_size), r.tot_size)?;
-    writeln!(w, "Allocated size  {} ({} bytes)", textutil::size(r.tot_alloc), r.tot_alloc)?;
+    writeln!(
+        w,
+        "Logical size    {} ({} bytes)",
+        textutil::size(r.tot_size),
+        r.tot_size
+    )?;
+    writeln!(
+        w,
+        "Allocated size  {} ({} bytes)",
+        textutil::size(r.tot_alloc),
+        r.tot_alloc
+    )?;
     writeln!(w, "Elapsed         {}", textutil::go_duration(st.elapsed()))?;
     for (k, &c) in st.err_counts.iter().enumerate() {
         if c > 0 {
-            writeln!(w, "{:<15} {}", inv::ErrKind::from_u8(k as u8).name(), textutil::count(c))?;
+            writeln!(
+                w,
+                "{:<15} {}",
+                inv::ErrKind::from_u8(k as u8).name(),
+                textutil::count(c)
+            )?;
         }
     }
     if st.excluded > 0 {
-        writeln!(w, "Excluded        {} entries ({})", textutil::count(st.excluded), textutil::sanitize(&st.excludes.join(", ")))?;
+        writeln!(
+            w,
+            "Excluded        {} entries ({})",
+            textutil::count(st.excluded),
+            textutil::sanitize(&st.excludes.join(", "))
+        )?;
     }
     if st.skipped_mounts > 0 {
         writeln!(w, "Other FS skipped {}", textutil::count(st.skipped_mounts))?;
     }
     if st.virtual_skipped > 0 {
-        writeln!(w, "Virtual FS skipped {}", textutil::count(st.virtual_skipped))?;
+        writeln!(
+            w,
+            "Virtual FS skipped {}",
+            textutil::count(st.virtual_skipped)
+        )?;
     }
     if st.hardlink_dups > 0 {
-        writeln!(w, "Hard-link dups  {} (counted once)", textutil::count(st.hardlink_dups))?;
+        writeln!(
+            w,
+            "Hard-link dups  {} (counted once)",
+            textutil::count(st.hardlink_dups)
+        )?;
     }
     if st.incomplete() {
-        writeln!(w, "WARNING: totals are incomplete — some data could not be inspected.")?;
+        writeln!(
+            w,
+            "WARNING: totals are incomplete — some data could not be inspected."
+        )?;
     }
     Ok(())
 }
@@ -199,11 +277,27 @@ mod tests {
     fn outputs_are_terminal_safe() {
         let t = hostile_tree();
         for out in [
-            { let mut b = Vec::new(); json(&mut b, &t, 0, -1).unwrap(); b },
-            { let mut b = Vec::new(); csv(&mut b, &t, 0, -1).unwrap(); b },
-            { let mut b = Vec::new(); table(&mut b, &t, &[1, 2], SizeMode::Allocated).unwrap(); b },
+            {
+                let mut b = Vec::new();
+                json(&mut b, &t, 0, -1).unwrap();
+                b
+            },
+            {
+                let mut b = Vec::new();
+                csv(&mut b, &t, 0, -1).unwrap();
+                b
+            },
+            {
+                let mut b = Vec::new();
+                table(&mut b, &t, &[1, 2], SizeMode::Allocated).unwrap();
+                b
+            },
         ] {
-            assert!(!out.iter().any(|&c| c == 0x1b || c == 0x07), "{}", String::from_utf8_lossy(&out));
+            assert!(
+                !out.iter().any(|&c| c == 0x1b || c == 0x07),
+                "{}",
+                String::from_utf8_lossy(&out)
+            );
         }
         let mut b = Vec::new();
         json(&mut b, &t, 0, -1).unwrap();

src/filter/apply.rs

@@ -41,7 +41,9 @@ pub fn apply(cancel: &Cancel, t: &Tree, q: Arc<Query>, m: SizeMode) -> Option<Fi
     let mut matched = vec![false; n];
     let mut covered = vec![false; n];
     let mut count = 0;
-    let now = SystemTime::now().duration_since(UNIX_EPOCH).map_or(0, |d| d.as_nanos() as i64);
+    let now = SystemTime::now()
+        .duration_since(UNIX_EPOCH)
+        .map_or(0, |d| d.as_nanos() as i64);
     let mut c = Ctx::new(t, 0, now);
     if q.uses_path {
         c.dir_paths = Some(vec![String::new(); n]);
@@ -75,5 +77,13 @@ pub fn apply(cancel: &Cancel, t: &Tree, q: Arc<Query>, m: SizeMode) -> Option<Fi
         sizes[p] = sizes[p].saturating_add(sizes[i]);
     }
     let total = sizes.first().copied().unwrap_or(0);
-    Some(FilterResult { query: q, mode: m, sizes, matched, count, total, elapsed: start.elapsed() })
+    Some(FilterResult {
+        query: q,
+        mode: m,
+        sizes,
+        matched,
+        count,
+        total,
+        elapsed: start.elapsed(),
+    })
 }

src/filter/eval.rs

@@ -32,7 +32,16 @@ fn push_lower(buf: &mut String, name: &[u8]) {
 
 impl<'a> Ctx<'a> {
     pub fn new(tree: &'a Tree, id: NodeId, now: i64) -> Ctx<'a> {
-        Ctx { tree, id, node: tree.node(id), now, path: String::new(), has_path: false, name: String::new(), dir_paths: None }
+        Ctx {
+            tree,
+            id,
+            node: tree.node(id),
+            now,
+            path: String::new(),
+            has_path: false,
+            name: String::new(),
+            dir_paths: None,
+        }
     }
 
     /// Moves the context to another node.
@@ -82,7 +91,12 @@ impl<'a> Ctx<'a> {
     pub(super) fn fill_path(&mut self) {
         self.has_path = true;
         self.path.clear();
-        if let Some(pp) = self.dir_paths.as_ref().and_then(|dp| dp.get(self.node.parent as usize)).filter(|p| !p.is_empty()) {
+        if let Some(pp) = self
+            .dir_paths
+            .as_ref()
+            .and_then(|dp| dp.get(self.node.parent as usize))
+            .filter(|p| !p.is_empty())
+        {
             self.path.push_str(pp);
             if !pp.ends_with('/') {
                 self.path.push('/');
@@ -90,7 +104,8 @@ impl<'a> Ctx<'a> {
             push_lower(&mut self.path, &self.node.name);
             return;
         }
-        self.path.push_str(&self.tree.path_string(self.id).to_lowercase());
+        self.path
+            .push_str(&self.tree.path_string(self.id).to_lowercase());
     }
 }
 

src/filter/lexer.rs

@@ -17,7 +17,11 @@ pub(super) struct Token {
 }
 
 fn tok(kind: TokKind, val: &str, pos: usize) -> Token {
-    Token { kind, val: val.to_string(), pos }
+    Token {
+        kind,
+        val: val.to_string(),
+        pos,
+    }
 }
 
 /// ASCII white space as Go's unicode.IsSpace sees it.
@@ -64,12 +68,18 @@ pub(super) fn lex(s: &str) -> Result<Vec<Token>, String> {
                 }
                 i += 1;
                 // Only ASCII bytes were dropped, so v is still valid UTF-8.
-                out.push(Token { kind: Str, val: String::from_utf8_lossy(&v).into_owned(), pos: start });
+                out.push(Token {
+                    kind: Str,
+                    val: String::from_utf8_lossy(&v).into_owned(),
+                    pos: start,
+                });
             }
             b'=' | b'!' | b'<' | b'>' | b'~' | b'&' | b'|' => {
                 let start = i;
                 let n = b.get(i + 1).copied();
-                let two = n == Some(b'=') || (c == b'&' && n == Some(b'&')) || (c == b'|' && n == Some(b'|'));
+                let two = n == Some(b'=')
+                    || (c == b'&' && n == Some(b'&'))
+                    || (c == b'|' && n == Some(b'|'));
                 let op = &s[i..i + 1 + two as usize];
                 i += op.len();
                 match op {

src/filter/mod.rs

@@ -43,7 +43,10 @@ mod tests {
             let n = t.node_mut(id);
             n.size = size;
             n.alloc = size;
-            n.mtime = (SystemTime::now() - age).duration_since(UNIX_EPOCH).unwrap().as_nanos() as i64;
+            n.mtime = (SystemTime::now() - age)
+                .duration_since(UNIX_EPOCH)
+                .unwrap()
+                .as_nanos() as i64;
             n.cat = category_for(&ext(name.as_bytes()), false, false);
         };
         add(vms, "ubuntu.qcow2", 80 << 30, 400 * DAY);
@@ -58,7 +61,10 @@ mod tests {
     fn names(tr: &Tree, q: &str) -> HashSet<String> {
         let pq = parse(q, SystemTime::now()).unwrap_or_else(|e| panic!("parse({q:?}): {e}"));
         let r = apply(&Cancel::new(), tr, Arc::new(pq), SizeMode::Logical).unwrap();
-        (0..tr.len() as NodeId).filter(|&i| r.is_match(i)).map(|i| tr.node(i).name_str().into_owned()).collect()
+        (0..tr.len() as NodeId)
+            .filter(|&i| r.is_match(i))
+            .map(|i| tr.node(i).name_str().into_owned())
+            .collect()
     }
 
     #[test]
@@ -70,7 +76,10 @@ mod tests {
             ("size > 1GB", &["vms", "ubuntu.qcow2", "win.vmdk"]),
             ("size > 1GB AND type = file", &["ubuntu.qcow2", "win.vmdk"]),
             ("ext = qcow2", &["ubuntu.qcow2"]),
-            ("size > 500MB AND ext IN (iso,qcow2,vmdk)", &["ubuntu.qcow2", "win.vmdk", "blob.iso"]),
+            (
+                "size > 500MB AND ext IN (iso,qcow2,vmdk)",
+                &["ubuntu.qcow2", "win.vmdk", "blob.iso"],
+            ),
             ("path contains cache", &["cache", "blob.iso", "x.tmp"]),
             ("age > 365d", &["ubuntu.qcow2"]),
             ("NOT type = dir AND size < 1k", &["notes.txt", "x.tmp"]),
@@ -91,16 +100,32 @@ mod tests {
         let tr = tree();
         let q = parse("name = vms OR ext = qcow2", SystemTime::now()).unwrap();
         let r = apply(&Cancel::new(), &tr, Arc::new(q), SizeMode::Logical).unwrap();
-        assert_eq!(r.total, tr.node(1).tot_size, "matching dir must not double count matching child");
+        assert_eq!(
+            r.total,
+            tr.node(1).tot_size,
+            "matching dir must not double count matching child"
+        );
     }
 
     #[test]
     fn parse_errors() {
         for q in [
-            "", "size >", "size > banana", "(ext = iso", "ext = iso)", "size contains 5",
-            "name matches '['", "type = blob", "'unterminated", "a & b", "category = nope",
+            "",
+            "size >",
+            "size > banana",
+            "(ext = iso",
+            "ext = iso)",
+            "size contains 5",
+            "name matches '['",
+            "type = blob",
+            "'unterminated",
+            "a & b",
+            "category = nope",
         ] {
-            assert!(parse(q, SystemTime::now()).is_err(), "parse({q:?}) should fail");
+            assert!(
+                parse(q, SystemTime::now()).is_err(),
+                "parse({q:?}) should fail"
+            );
         }
     }
 
@@ -109,10 +134,20 @@ mod tests {
         let tr = tree();
         assert_eq!(names(&tr, "modified < 2000-01-01"), HashSet::new());
         assert_eq!(names(&tr, "modified > '2000-01-01 9:30'").len(), 5);
-        assert_eq!(names(&tr, "modified > 2000-01-01T00:00:00.5+01:00").len(), 5);
+        assert_eq!(
+            names(&tr, "modified > 2000-01-01T00:00:00.5+01:00").len(),
+            5
+        );
         assert_eq!(names(&tr, "modified > 30d").len(), 4);
-        for bad in ["modified > 2024-02-30", "modified > 2024-01-31T10:00", "ext = 'a['"] {
-            assert!(parse(bad, SystemTime::now()).is_ok() == bad.ends_with("10:00"), "{bad}");
+        for bad in [
+            "modified > 2024-02-30",
+            "modified > 2024-01-31T10:00",
+            "ext = 'a['",
+        ] {
+            assert!(
+                parse(bad, SystemTime::now()).is_ok() == bad.ends_with("10:00"),
+                "{bad}"
+            );
         }
         assert!(names(&tr, "[").is_empty()); // malformed bare glob matches nothing
         assert!(names(&tr, "voilà\u{a0}x").is_empty()); // Go's lexer hangs on byte 0xA0
@@ -120,7 +155,13 @@ mod tests {
 
     #[test]
     fn parse_size_units() {
-        for (input, want) in [("1GB", 1_000_000_000), ("1GiB", 1 << 30), ("1.5k", 1536), ("500MB", 500_000_000), ("10", 10)] {
+        for (input, want) in [
+            ("1GB", 1_000_000_000),
+            ("1GiB", 1 << 30),
+            ("1.5k", 1536),
+            ("500MB", 500_000_000),
+            ("10", 10),
+        ] {
             assert_eq!(parse_size(input), Ok(want), "{input}");
         }
     }

src/filter/parser.rs

@@ -43,7 +43,8 @@ fn field_by_name(s: &str) -> Option<Field> {
 }
 
 /// Field names for help text.
-pub const FIELDS: &str = "name path ext type category size allocated age modified owner group files flag";
+pub const FIELDS: &str =
+    "name path ext type category size allocated age modified owner group files flag";
 
 /// A compiled filter.
 pub struct Query {
@@ -68,7 +69,12 @@ struct Parser {
 /// Compiles a query. now anchors relative ages (pass SystemTime::now()).
 pub fn parse(s: &str, now: SystemTime) -> Result<Query, String> {
     let toks = lex(s)?;
-    let mut p = Parser { toks, i: 0, uses_path: false, now };
+    let mut p = Parser {
+        toks,
+        i: 0,
+        uses_path: false,
+        now,
+    };
     if p.peek().kind == TokKind::Eof {
         return Err("empty query".into());
     }
@@ -77,7 +83,11 @@ pub fn parse(s: &str, now: SystemTime) -> Result<Query, String> {
     if t.kind != TokKind::Eof {
         return Err(format!("unexpected {:?} at {}", t.val, t.pos + 1));
     }
-    Ok(Query { src: s.to_string(), root, uses_path: p.uses_path })
+    Ok(Query {
+        src: s.to_string(),
+        root,
+        uses_path: p.uses_path,
+    })
 }
 
 fn is_kw(t: &Token, kw: &str) -> bool {
@@ -193,7 +203,10 @@ impl Parser {
         if f == Field::Path {
             self.uses_path = true;
         }
-        if matches!(f, Field::Size | Field::Allocated | Field::Age | Field::Modified | Field::Files) {
+        if matches!(
+            f,
+            Field::Size | Field::Allocated | Field::Age | Field::Modified | Field::Files
+        ) {
             let nop = match op.as_str() {
                 "=" | "in" => NumOp::Eq,
                 "!=" => NumOp::Ne,
@@ -203,7 +216,10 @@ impl Parser {
                 "<=" => NumOp::Le,
                 _ => return Err(format!("{op} cannot be used with numeric field")),
             };
-            let nums = vals.iter().map(|v| self.number(f, &v.val)).collect::<Result<Vec<_>, _>>()?;
+            let nums = vals
+                .iter()
+                .map(|v| self.number(f, &v.val))
+                .collect::<Result<Vec<_>, _>>()?;
             return Ok(Expr::Num(f, nop, nums));
         }
         // String-like fields.
@@ -244,7 +260,11 @@ impl Parser {
                 } else {
                     Expr::Eq(f, set)
                 };
-                Ok(if op == "!=" { Expr::Not(Box::new(n)) } else { n })
+                Ok(if op == "!=" {
+                    Expr::Not(Box::new(n))
+                } else {
+                    n
+                })
             }
             _ => Err(format!("operator {op} not valid for {}", op_tok.val)),
         }
@@ -256,7 +276,9 @@ impl Parser {
     fn number(&self, f: Field, s: &str) -> Result<i64, String> {
         match f {
             Field::Size | Field::Allocated => parse_size(s),
-            Field::Files => s.parse::<i64>().map_err(|e| format!("bad number {s:?}: {e}")),
+            Field::Files => s
+                .parse::<i64>()
+                .map_err(|e| format!("bad number {s:?}: {e}")),
             Field::Age => parse_age(s).map(nanos),
             Field::Modified => {
                 if let Some(t) = parse_date(s) {
@@ -266,7 +288,9 @@ impl Parser {
                     let now = self.now.duration_since(UNIX_EPOCH).map(nanos).unwrap_or(0);
                     return Ok(now.saturating_sub(nanos(d)));
                 }
-                Err(format!("bad date {s:?} (use YYYY-MM-DD or an age like 30d)"))
+                Err(format!(
+                    "bad date {s:?} (use YYYY-MM-DD or an age like 30d)"
+                ))
             }
             _ => Err("not numeric".into()),
         }
@@ -285,7 +309,11 @@ pub(super) fn name_match(v: &str) -> Expr {
     let lv = v.to_lowercase();
     if has_glob(v) {
         // Go's filepath.Match never matches a malformed pattern.
-        return if glob_ok(lv.as_bytes()) { Expr::Glob(Field::Name, lv) } else { Expr::False };
+        return if glob_ok(lv.as_bytes()) {
+            Expr::Glob(Field::Name, lv)
+        } else {
+            Expr::False
+        };
     }
     Expr::Contains(Field::Name, lv)
 }
@@ -365,7 +393,10 @@ fn flag_bit(s: &str) -> Option<Flags> {
 
 /// Splits a leading run of digits and dots from s.
 fn split_num(s: &str) -> (&str, &str) {
-    let i = s.bytes().position(|c| !(c.is_ascii_digit() || c == b'.')).unwrap_or(s.len());
+    let i = s
+        .bytes()
+        .position(|c| !(c.is_ascii_digit() || c == b'.'))
+        .unwrap_or(s.len());
     s.split_at(i)
 }
 
@@ -374,8 +405,14 @@ fn split_num(s: &str) -> (&str, &str) {
 /// (textutil::set_si).
 pub fn parse_size(s: &str) -> Result<i64, String> {
     let (num, unit_raw) = split_num(s);
-    let Ok(v) = num.parse::<f64>() else { return Err(format!("bad size {s:?}")) };
-    let bare: f64 = if crate::textutil::si() { 1000.0 } else { 1024.0 };
+    let Ok(v) = num.parse::<f64>() else {
+        return Err(format!("bad size {s:?}"));
+    };
+    let bare: f64 = if crate::textutil::si() {
+        1000.0
+    } else {
+        1024.0
+    };
     let m = match unit_raw.trim().to_lowercase().as_str() {
         "" | "b" => 1.0,
         "k" => bare,
@@ -405,7 +442,9 @@ pub fn parse_size(s: &str) -> Result<i64, String> {
 /// Parses durations like 90s, 30min, 12h, 7d, 2w, 6mo, 1y.
 pub fn parse_age(s: &str) -> Result<Duration, String> {
     let (num, unit) = split_num(s);
-    let Ok(v) = num.parse::<f64>() else { return Err(format!("bad age {s:?}")) };
+    let Ok(v) = num.parse::<f64>() else {
+        return Err(format!("bad age {s:?}"));
+    };
     const DAY: f64 = 86400.0;
     let secs = match unit.to_lowercase().as_str() {
         "s" | "sec" => 1.0,
@@ -415,7 +454,11 @@ pub fn parse_age(s: &str) -> Result<Duration, String> {
         "w" => 7.0 * DAY,
         "m" | "mo" => 30.0 * DAY,
         "y" => 365.0 * DAY,
-        _ => return Err(format!("unknown age unit {unit:?} (s, min, h, d, w, mo, y)")),
+        _ => {
+            return Err(format!(
+                "unknown age unit {unit:?} (s, min, h, d, w, mo, y)"
+            ))
+        }
     };
     // Saturates where Go's time.Duration would overflow.
     Ok(Duration::from_nanos((v * secs * 1e9) as u64))
@@ -428,10 +471,17 @@ fn parse_date(s: &str) -> Option<i64> {
     let b = s.as_bytes();
     let fixed = |i: usize, n: usize| -> Option<i64> {
         let d = b.get(i..i + n)?;
-        d.iter().all(u8::is_ascii_digit).then(|| d.iter().fold(0, |a, &c| a * 10 + (c - b'0') as i64))
+        d.iter()
+            .all(u8::is_ascii_digit)
+            .then(|| d.iter().fold(0, |a, &c| a * 10 + (c - b'0') as i64))
     };
     let (y, mo, d) = (fixed(0, 4)?, fixed(5, 2)?, fixed(8, 2)?);
-    if b.get(4) != Some(&b'-') || b.get(7) != Some(&b'-') || !(1..=12).contains(&mo) || d < 1 || d > days_in(y, mo) {
+    if b.get(4) != Some(&b'-')
+        || b.get(7) != Some(&b'-')
+        || !(1..=12).contains(&mo)
+        || d < 1
+        || d > days_in(y, mo)
+    {
         return None;
     }
     if b.len() == 10 {
@@ -473,7 +523,10 @@ fn parse_date(s: &str) -> Option<i64> {
             return None;
         }
         for k in 0..9 {
-            ns = ns * 10 + b.get(i + 1 + k).filter(|_| k < n).map_or(0, |c| (c - b'0') as i64);
+            ns = ns * 10
+                + b.get(i + 1 + k)
+                    .filter(|_| k < n)
+                    .map_or(0, |c| (c - b'0') as i64);
         }
         i += 1 + n;
     }

src/inventory/category.rs

@@ -23,14 +23,33 @@ pub enum Category {
 pub const NUM_CATEGORIES: usize = 12;
 
 const CATEGORY_NAMES: [&str; NUM_CATEGORIES] = [
-    "Other", "Image", "Video", "Audio", "Archive", "Disk image", "Database",
-    "Source code", "Document", "Executable", "Log", "Cache",
+    "Other",
+    "Image",
+    "Video",
+    "Audio",
+    "Archive",
+    "Disk image",
+    "Database",
+    "Source code",
+    "Document",
+    "Executable",
+    "Log",
+    "Cache",
 ];
 
 const ALL: [Category; NUM_CATEGORIES] = [
-    Category::Other, Category::Image, Category::Video, Category::Audio, Category::Archive,
-    Category::DiskImage, Category::Database, Category::Code, Category::Document,
-    Category::Executable, Category::Log, Category::Cache,
+    Category::Other,
+    Category::Image,
+    Category::Video,
+    Category::Audio,
+    Category::Archive,
+    Category::DiskImage,
+    Category::Database,
+    Category::Code,
+    Category::Document,
+    Category::Executable,
+    Category::Log,
+    Category::Cache,
 ];
 
 impl Category {
@@ -98,8 +117,12 @@ fn ext_table() -> &'static HashMap<&'static str, Category> {
 pub fn category_for(ext: &str, in_cache: bool, in_log: bool) -> Category {
     let c = ext_table().get(ext).copied();
     match c {
-        _ if in_cache && matches!(c, None | Some(Category::Other) | Some(Category::Code)) => Category::Cache,
-        _ if in_log && matches!(c, None | Some(Category::Archive) | Some(Category::Other)) => Category::Log,
+        _ if in_cache && matches!(c, None | Some(Category::Other) | Some(Category::Code)) => {
+            Category::Cache
+        }
+        _ if in_log && matches!(c, None | Some(Category::Archive) | Some(Category::Other)) => {
+            Category::Log
+        }
         Some(c) => c,
         None => Category::Other,
     }
@@ -114,7 +137,8 @@ pub fn path_hints(path: &[u8]) -> (bool, bool) {
             continue;
         }
         match part.to_ascii_lowercase().as_slice() {
-            b"cache" | b".cache" | b"caches" | b"__pycache__" | b".npm" | b".gradle" | b"inetcache" | b"temp" | b"tmp" => in_cache = true,
+            b"cache" | b".cache" | b"caches" | b"__pycache__" | b".npm" | b".gradle"
+            | b"inetcache" | b"temp" | b"tmp" => in_cache = true,
             b"log" | b"logs" | b".logs" | b"journal" => in_log = true,
             _ => {}
         }

src/inventory/mod.rs

@@ -72,8 +72,8 @@ pub struct Node {
     /// Single path component (raw bytes); the root holds the full root path.
     pub name: Box<[u8]>,
 
-    pub size: i64, // own logical bytes
-    pub alloc: i64, // own allocated bytes
+    pub size: i64,     // own logical bytes
+    pub alloc: i64,    // own allocated bytes
     pub tot_size: i64, // aggregates (hard-link duplicates contribute 0)
     pub tot_alloc: i64,
     pub mtime: i64, // unix nanoseconds
@@ -81,7 +81,7 @@ pub struct Node {
     pub files: u32, // recursive counts beneath (dirs excludes self)
     pub dirs: u32,
     pub errors: u32, // recursive error count beneath and including self
-    pub mode: u32,  // Go fs.FileMode bit layout (see platform::mode)
+    pub mode: u32,   // Go fs.FileMode bit layout (see platform::mode)
     pub uid: u32,
     pub gid: u32,
     pub nlink: u32,
@@ -129,7 +129,10 @@ struct Chunked<T> {
 
 impl<T> Chunked<T> {
     fn new() -> Self {
-        Chunked { c: Vec::new(), n: 0 }
+        Chunked {
+            c: Vec::new(),
+            n: 0,
+        }
     }
     fn add(&mut self, v: T) -> u32 {
         if self.n & (CHUNK_SIZE - 1) == 0 && self.n >> CHUNK_BITS == self.c.len() {
@@ -202,9 +205,22 @@ impl Tree {
             next_sibling: NO_NODE,
             dir: 0,
             name: name.into(),
-            size: 0, alloc: 0, tot_size: 0, tot_alloc: 0, mtime: 0,
-            files: 0, dirs: 0, errors: 0, mode: 0, uid: 0, gid: 0, nlink: 0,
-            ext: 0, flags: 0, kind, cat: Category::Other,
+            size: 0,
+            alloc: 0,
+            tot_size: 0,
+            tot_alloc: 0,
+            mtime: 0,
+            files: 0,
+            dirs: 0,
+            errors: 0,
+            mode: 0,
+            uid: 0,
+            gid: 0,
+            nlink: 0,
+            ext: 0,
+            flags: 0,
+            kind,
+            cat: Category::Other,
         };
         if kind == Kind::Dir {
             n.dir = self.dirs.add([0; NUM_CATEGORIES]);
@@ -274,7 +290,10 @@ impl Tree {
 
     /// Iterates the children of id (in reverse insertion order).
     pub fn children(&self, id: NodeId) -> Children<'_> {
-        Children { t: self, cur: self.node(id).first_child }
+        Children {
+            t: self,
+            cur: self.node(id).first_child,
+        }
     }
 
     pub fn child_count(&self, id: NodeId) -> usize {
@@ -408,9 +427,17 @@ struct Shallow {
 impl Node {
     fn clone_shallow(&self) -> Shallow {
         Shallow {
-            parent: self.parent, dir: self.dir, tot_size: self.tot_size, tot_alloc: self.tot_alloc,
-            alloc: self.alloc, files: self.files, dirs: self.dirs, errors: self.errors,
-            flags: self.flags, kind: self.kind, cat: self.cat,
+            parent: self.parent,
+            dir: self.dir,
+            tot_size: self.tot_size,
+            tot_alloc: self.tot_alloc,
+            alloc: self.alloc,
+            files: self.files,
+            dirs: self.dirs,
+            errors: self.errors,
+            flags: self.flags,
+            kind: self.kind,
+            cat: self.cat,
         }
     }
 }
@@ -471,7 +498,13 @@ mod tests {
 
     #[test]
     fn ext_and_category() {
-        for (input, want) in [("a.QCOW2", "qcow2"), (".bashrc", ""), ("noext", ""), ("x.tar.gz", "gz"), ("trail.", "")] {
+        for (input, want) in [
+            ("a.QCOW2", "qcow2"),
+            (".bashrc", ""),
+            ("noext", ""),
+            ("x.tar.gz", "gz"),
+            ("trail.", ""),
+        ] {
             assert_eq!(ext(input.as_bytes()), want, "{input}");
         }
         assert_eq!(category_for("qcow2", false, false), Category::DiskImage);

src/inventory/query.rs

@@ -47,7 +47,10 @@ pub struct TopK {
 
 impl TopK {
     pub fn new(k: usize) -> TopK {
-        TopK { k, h: BinaryHeap::with_capacity(k.min(1 << 16)) }
+        TopK {
+            k,
+            h: BinaryHeap::with_capacity(k.min(1 << 16)),
+        }
     }
 
     pub fn offer(&mut self, id: NodeId, key: i64) {
@@ -67,7 +70,11 @@ impl TopK {
     /// The collected IDs, largest key first (ties by ID).
     pub fn sorted(self) -> Vec<NodeId> {
         // into_sorted_vec is ascending in Reverse order = descending key.
-        self.h.into_sorted_vec().into_iter().map(|Reverse((_, Reverse(id)))| id).collect()
+        self.h
+            .into_sorted_vec()
+            .into_iter()
+            .map(|Reverse((_, Reverse(id)))| id)
+            .collect()
     }
 }
 
@@ -87,7 +94,13 @@ impl Tree {
 
     /// The k nodes beneath (and including) root with the largest key,
     /// considering only nodes accepted by keep.
-    pub fn top(&self, root: NodeId, k: usize, keep: impl Fn(&Node) -> bool, key: impl Fn(&Node) -> i64) -> Vec<NodeId> {
+    pub fn top(
+        &self,
+        root: NodeId,
+        k: usize,
+        keep: impl Fn(&Node) -> bool,
+        key: impl Fn(&Node) -> i64,
+    ) -> Vec<NodeId> {
         let mut tk = TopK::new(k);
         self.walk(root, |id, n| {
             if keep(n) {

src/inventory/stats.rs

@@ -18,13 +18,25 @@ pub const NUM_ERR_KINDS: usize = 5;
 
 impl ErrKind {
     pub fn from_u8(v: u8) -> ErrKind {
-        [ErrKind::Permission, ErrKind::Vanished, ErrKind::Io, ErrKind::Loop, ErrKind::Other]
-            .get(v as usize)
-            .copied()
-            .unwrap_or(ErrKind::Other)
+        [
+            ErrKind::Permission,
+            ErrKind::Vanished,
+            ErrKind::Io,
+            ErrKind::Loop,
+            ErrKind::Other,
+        ]
+        .get(v as usize)
+        .copied()
+        .unwrap_or(ErrKind::Other)
     }
     pub fn name(self) -> &'static str {
-        ["Permission denied", "Vanished during scan", "I/O error", "Symlink loop", "Other error"][self as usize]
+        [
+            "Permission denied",
+            "Vanished during scan",
+            "I/O error",
+            "Symlink loop",
+            "Other error",
+        ][self as usize]
     }
 }
 
@@ -46,7 +58,7 @@ pub fn classify(err: &io::Error) -> ErrKind {
 /// One recorded scan error.
 #[derive(Clone, Debug, Default)]
 pub struct ErrorRecord {
-    pub node: NodeId,  // node the error is attached to (the directory for listing failures)
+    pub node: NodeId, // node the error is attached to (the directory for listing failures)
     pub name: Vec<u8>, // entry name when no node was created (e.g. vanished)
     pub kind: ErrKind,
     pub msg: String,
@@ -89,11 +101,29 @@ pub struct Stats {
 impl Default for Stats {
     fn default() -> Self {
         Stats {
-            root: Vec::new(), start: SystemTime::now(), end: None, complete: false, cancelled: false,
-            files: 0, dirs: 0, symlinks: 0, others: 0, err_counts: [0; NUM_ERR_KINDS], errors: Vec::new(),
-            excluded: 0, skipped_mounts: 0, virtual_skipped: 0, loops_skipped: 0, broken_links: 0,
-            hardlink_dups: 0, unscanned: 0, excludes: Vec::new(), one_file_system: false,
-            follow: String::new(), workers: 0, from_snapshot: String::new(),
+            root: Vec::new(),
+            start: SystemTime::now(),
+            end: None,
+            complete: false,
+            cancelled: false,
+            files: 0,
+            dirs: 0,
+            symlinks: 0,
+            others: 0,
+            err_counts: [0; NUM_ERR_KINDS],
+            errors: Vec::new(),
+            excluded: 0,
+            skipped_mounts: 0,
+            virtual_skipped: 0,
+            loops_skipped: 0,
+            broken_links: 0,
+            hardlink_dups: 0,
+            unscanned: 0,
+            excludes: Vec::new(),
+            one_file_system: false,
+            follow: String::new(),
+            workers: 0,
+            from_snapshot: String::new(),
         }
     }
 }

src/main.rs

@@ -7,11 +7,36 @@ use std::path::Path;
 
 /// Flags taking a value (Go's flag package: `-f v`, `-f=v`, `--f v`, `--f=v`).
 const VALUE_FLAGS: &[&str] = &[
-    "workers", "follow-symlinks", "depth", "top", "largest-files", "save", "snapshot", "load", "scan",
-    "theme", "color", "log", "log-level", "exclude",
+    "workers",
+    "follow-symlinks",
+    "depth",
+    "top",
+    "largest-files",
+    "save",
+    "snapshot",
+    "load",
+    "scan",
+    "theme",
+    "color",
+    "log",
+    "log-level",
+    "exclude",
 ];
 /// Boolean flags (`-f`, `-f=false`).
-const BOOL_FLAGS: &[&str] = &["one-file-system", "x", "read-only", "no-ui", "json", "csv", "duplicates", "compare", "si", "apparent", "no-mouse", "version"];
+const BOOL_FLAGS: &[&str] = &[
+    "one-file-system",
+    "x",
+    "read-only",
+    "no-ui",
+    "json",
+    "csv",
+    "duplicates",
+    "compare",
+    "si",
+    "apparent",
+    "no-mouse",
+    "version",
+];
 
 fn usage() {
     let n = brand::NAME;
@@ -54,7 +79,10 @@ Flags:
 }
 
 fn main() {
-    std::process::exit(run(std::env::args_os().skip(1).map(|a| a.to_string_lossy().into_owned()).collect()));
+    std::process::exit(run(std::env::args_os()
+        .skip(1)
+        .map(|a| a.to_string_lossy().into_owned())
+        .collect()));
 }
 
 fn fail(msg: impl std::fmt::Display) -> i32 {
@@ -74,7 +102,11 @@ fn run(args: Vec<String>) -> i32 {
             positional.extend(it.by_ref());
             break;
         }
-        let Some(flag) = a.strip_prefix("--").or_else(|| a.strip_prefix('-')).filter(|f| !f.is_empty() && a != "-") else {
+        let Some(flag) = a
+            .strip_prefix("--")
+            .or_else(|| a.strip_prefix('-'))
+            .filter(|f| !f.is_empty() && a != "-")
+        else {
             positional.push(a);
             continue;
         };
@@ -90,10 +122,17 @@ fn run(args: Vec<String>) -> i32 {
             match inline.as_deref().map(str::parse::<bool>) {
                 None => bools.insert(n, true),
                 Some(Ok(v)) => bools.insert(n, v),
-                Some(Err(_)) => return fail(format!("invalid boolean value {:?} for -{n}", inline.unwrap())),
+                Some(Err(_)) => {
+                    return fail(format!(
+                        "invalid boolean value {:?} for -{n}",
+                        inline.unwrap()
+                    ))
+                }
             };
         } else if let Some(&n) = VALUE_FLAGS.iter().find(|&&f| f == name) {
-            let Some(v) = inline.or_else(|| it.next()) else { return fail(format!("flag needs an argument: -{n}")) };
+            let Some(v) = inline.or_else(|| it.next()) else {
+                return fail(format!("flag needs an argument: -{n}"));
+            };
             if n == "exclude" {
                 excludes.push(v);
             } else {
@@ -107,11 +146,20 @@ fn run(args: Vec<String>) -> i32 {
     let b = |n: &str| bools.get(n).copied();
     let v = |n: &str| vals.get(n).cloned();
     let int = |n: &str, d: i64| -> Result<i64, String> {
-        v(n).map_or(Ok(d), |s| s.parse().map_err(|_| format!("invalid value {s:?} for flag -{n}: parse error")))
+        v(n).map_or(Ok(d), |s| {
+            s.parse()
+                .map_err(|_| format!("invalid value {s:?} for flag -{n}: parse error"))
+        })
     };
 
     if b("version") == Some(true) {
-        println!("{} {} ({}/{})", brand::NAME, brand::VERSION, std::env::consts::OS, std::env::consts::ARCH);
+        println!(
+            "{} {} ({}/{})",
+            brand::NAME,
+            brand::VERSION,
+            std::env::consts::OS,
+            std::env::consts::ARCH
+        );
         return 0;
     }
     if let Some(e) = cfg_err {
@@ -143,7 +191,11 @@ fn run(args: Vec<String>) -> i32 {
         color: v("color").unwrap_or_else(|| "auto".into()),
         load: v("load").unwrap_or_default(),
         save: v("save").or_else(|| v("snapshot")).unwrap_or_default(),
-        size_mode: if b("apparent").unwrap_or(settings.size_mode == "logical") { SizeMode::Logical } else { SizeMode::Allocated },
+        size_mode: if b("apparent").unwrap_or(settings.size_mode == "logical") {
+            SizeMode::Logical
+        } else {
+            SizeMode::Allocated
+        },
         ..Config::new(settings.clone())
     };
     if let Some(p) = v("scan") {
@@ -158,7 +210,10 @@ fn run(args: Vec<String>) -> i32 {
         if positional.len() > 1 {
             return fail("only one path may be scanned at a time");
         }
-        if positional.len() == 1 && cfg.load.is_empty() && snapshot::is_snapshot(Path::new(&positional[0])) {
+        if positional.len() == 1
+            && cfg.load.is_empty()
+            && snapshot::is_snapshot(Path::new(&positional[0]))
+        {
             cfg.load = positional.remove(0);
         } else {
             cfg.paths = positional;
@@ -168,14 +223,17 @@ fn run(args: Vec<String>) -> i32 {
         Ok(w) => w,
         Err(e) => return fail(e),
     };
-    let follow = match scan::parse_follow(&v("follow-symlinks").unwrap_or_else(|| settings.follow_symlinks.clone())) {
+    let follow = match scan::parse_follow(
+        &v("follow-symlinks").unwrap_or_else(|| settings.follow_symlinks.clone()),
+    ) {
         Ok(f) => f,
         Err(e) => return fail(e),
     };
     cfg.scan_opts = scan::Options {
         workers,
         follow,
-        one_file_system: b("one-file-system").unwrap_or(settings.one_file_system) || b("x").unwrap_or(false),
+        one_file_system: b("one-file-system").unwrap_or(settings.one_file_system)
+            || b("x").unwrap_or(false),
         excludes,
         ..Default::default()
     };

src/platform/mod.rs

@@ -117,7 +117,12 @@ fn cvt(r: libc::c_int) -> io::Result<libc::c_int> {
 
 fn open_dir(path: &[u8]) -> io::Result<OwnedFd> {
     let c = cstr(path)?;
-    let fd = cvt(unsafe { libc::open(c.as_ptr(), libc::O_RDONLY | libc::O_DIRECTORY | libc::O_CLOEXEC) })?;
+    let fd = cvt(unsafe {
+        libc::open(
+            c.as_ptr(),
+            libc::O_RDONLY | libc::O_DIRECTORY | libc::O_CLOEXEC,
+        )
+    })?;
     Ok(unsafe { OwnedFd::from_raw_fd(fd) })
 }
 
@@ -129,7 +134,15 @@ fn stat_at(dirfd: RawFd, name: &CStr, flags: libc::c_int) -> io::Result<Meta> {
     if !NO_STATX.load(Ordering::Relaxed) {
         let mut st: libc::statx = unsafe { std::mem::zeroed() };
         let mask = libc::STATX_BASIC_STATS | libc::STATX_BTIME;
-        let r = unsafe { libc::statx(dirfd, name.as_ptr(), flags | libc::AT_STATX_DONT_SYNC, mask, &mut st) };
+        let r = unsafe {
+            libc::statx(
+                dirfd,
+                name.as_ptr(),
+                flags | libc::AT_STATX_DONT_SYNC,
+                mask,
+                &mut st,
+            )
+        };
         if r == 0 {
             let mut m = Meta {
                 mode: mode_from_unix(st.stx_mode as u32),
@@ -202,7 +215,11 @@ impl Drop for DirStream {
 /// Streams the entries of a directory in chunks of up to `chunk`, stat-ing
 /// each entry relative to the directory fd (no repeated path resolution).
 /// Returning an error from f stops the read and returns it.
-pub fn read_dir<E: From<io::Error>>(path: &[u8], chunk: usize, mut f: impl FnMut(Vec<Meta>) -> Result<(), E>) -> Result<(), E> {
+pub fn read_dir<E: From<io::Error>>(
+    path: &[u8],
+    chunk: usize,
+    mut f: impl FnMut(Vec<Meta>) -> Result<(), E>,
+) -> Result<(), E> {
     let fd = open_dir(path)?;
     let raw = fd.as_raw_fd();
     let dir = unsafe { libc::fdopendir(raw) };
@@ -227,7 +244,10 @@ pub fn read_dir<E: From<io::Error>>(path: &[u8], chunk: usize, mut f: impl FnMut
         if nb == b"." || nb == b".." {
             continue;
         }
-        let mut m = stat_at(raw, name, libc::AT_SYMLINK_NOFOLLOW).unwrap_or_else(|e| Meta { err: Some(e), ..Default::default() });
+        let mut m = stat_at(raw, name, libc::AT_SYMLINK_NOFOLLOW).unwrap_or_else(|e| Meta {
+            err: Some(e),
+            ..Default::default()
+        });
         m.name = nb.to_vec();
         out.push(m);
         if out.len() >= chunk {
@@ -387,14 +407,22 @@ fn check_abs(path: &Path) -> io::Result<()> {
 /// final symlink, and O_NONBLOCK keeps a FIFO swapped in since the scan from
 /// blocking open(2) forever; callers still check the file type.
 pub fn open_content(path: &Path) -> io::Result<File> {
-    std::fs::OpenOptions::new().read(true).custom_flags(libc::O_NOFOLLOW | libc::O_NONBLOCK).open(path)
+    std::fs::OpenOptions::new()
+        .read(true)
+        .custom_flags(libc::O_NOFOLLOW | libc::O_NONBLOCK)
+        .open(path)
 }
 
 /// Runs a helper program with an argument vector (never a shell), detached
 /// from the terminal so it cannot disturb the TUI.
 fn start_detached(name: &str, arg: &Path) -> io::Result<()> {
     use std::process::{Command, Stdio};
-    let mut child = Command::new(name).arg(arg).stdin(Stdio::null()).stdout(Stdio::null()).stderr(Stdio::null()).spawn()?;
+    let mut child = Command::new(name)
+        .arg(arg)
+        .stdin(Stdio::null())
+        .stdout(Stdio::null())
+        .stderr(Stdio::null())
+        .spawn()?;
     std::thread::spawn(move || child.wait());
     Ok(())
 }
@@ -406,8 +434,16 @@ pub const TRASH_NAME: &str = "trash";
 pub fn reveal(path: &Path) -> io::Result<()> {
     check_abs(path)?;
     let md = std::fs::symlink_metadata(path)?;
-    let target = if md.is_dir() { path } else { path.parent().unwrap_or(path) };
-    let opener = if cfg!(target_os = "macos") { "open" } else { "xdg-open" };
+    let target = if md.is_dir() {
+        path
+    } else {
+        path.parent().unwrap_or(path)
+    };
+    let opener = if cfg!(target_os = "macos") {
+        "open"
+    } else {
+        "xdg-open"
+    };
     start_detached(opener, target)
 }
 
@@ -417,7 +453,8 @@ pub fn headless() -> bool {
     if cfg!(target_os = "macos") {
         return false;
     }
-    std::env::var_os("DISPLAY").is_none_or(|v| v.is_empty()) && std::env::var_os("WAYLAND_DISPLAY").is_none_or(|v| v.is_empty())
+    std::env::var_os("DISPLAY").is_none_or(|v| v.is_empty())
+        && std::env::var_os("WAYLAND_DISPLAY").is_none_or(|v| v.is_empty())
 }
 
 fn split_parent(path: &Path) -> io::Result<(&Path, &OsStr)> {
@@ -430,7 +467,9 @@ fn split_parent(path: &Path) -> io::Result<(&Path, &OsStr)> {
 fn check_expect(dirfd: RawFd, base: &CStr, want: Expect) -> io::Result<libc::stat> {
     let mut st: libc::stat = unsafe { std::mem::zeroed() };
     cvt(unsafe { libc::fstatat(dirfd, base.as_ptr(), &mut st, libc::AT_SYMLINK_NOFOLLOW) })?;
-    if st.st_uid != want.uid || mode_from_unix(st.st_mode as u32) & mode::TYPE != want.mode & mode::TYPE {
+    if st.st_uid != want.uid
+        || mode_from_unix(st.st_mode as u32) & mode::TYPE != want.mode & mode::TYPE
+    {
         return Err(other(CHANGED));
     }
     Ok(st)
@@ -446,7 +485,11 @@ pub fn delete(path: &Path, want: Expect) -> io::Result<()> {
     let dfd = open_dir(dir.as_os_str().as_bytes())?;
     let cbase = cstr(base.as_bytes())?;
     let st = check_expect(dfd.as_raw_fd(), &cbase, want)?;
-    remove_at(dfd.as_raw_fd(), &cbase, st.st_mode & libc::S_IFMT == libc::S_IFDIR)
+    remove_at(
+        dfd.as_raw_fd(),
+        &cbase,
+        st.st_mode & libc::S_IFMT == libc::S_IFDIR,
+    )
 }
 
 fn remove_at(dirfd: RawFd, name: &CStr, is_dir: bool) -> io::Result<()> {
@@ -454,7 +497,11 @@ fn remove_at(dirfd: RawFd, name: &CStr, is_dir: bool) -> io::Result<()> {
         return cvt(unsafe { libc::unlinkat(dirfd, name.as_ptr(), 0) }).map(|_| ());
     }
     let fd = cvt(unsafe {
-        libc::openat(dirfd, name.as_ptr(), libc::O_RDONLY | libc::O_DIRECTORY | libc::O_NOFOLLOW | libc::O_CLOEXEC)
+        libc::openat(
+            dirfd,
+            name.as_ptr(),
+            libc::O_RDONLY | libc::O_DIRECTORY | libc::O_NOFOLLOW | libc::O_CLOEXEC,
+        )
     })?;
     let sub = unsafe { OwnedFd::from_raw_fd(fd) };
     // Collect names first: removing while iterating a DIR stream is unspecified.
@@ -475,7 +522,8 @@ fn remove_at(dirfd: RawFd, name: &CStr, is_dir: bool) -> io::Result<()> {
         if n.to_bytes() != b"." && n.to_bytes() != b".." {
             let t = unsafe { (*ent).d_type };
             let is_dir = match t {
-                libc::DT_UNKNOWN => fstat_at(sub.as_raw_fd(), n, libc::AT_SYMLINK_NOFOLLOW).is_ok_and(|m| mode::is_dir(m.mode)),
+                libc::DT_UNKNOWN => fstat_at(sub.as_raw_fd(), n, libc::AT_SYMLINK_NOFOLLOW)
+                    .is_ok_and(|m| mode::is_dir(m.mode)),
                 t => t == libc::DT_DIR,
             };
             names.push((n.to_owned(), is_dir));
@@ -498,7 +546,15 @@ fn rename_checked(path: &Path, dst: &Path, want: Expect) -> io::Result<()> {
     let cbase = cstr(base.as_bytes())?;
     check_expect(dfd.as_raw_fd(), &cbase, want)?;
     let cdst = cstr(dst.as_os_str().as_bytes())?;
-    cvt(unsafe { libc::renameat(dfd.as_raw_fd(), cbase.as_ptr(), libc::AT_FDCWD, cdst.as_ptr()) }).map(|_| ())
+    cvt(unsafe {
+        libc::renameat(
+            dfd.as_raw_fd(),
+            cbase.as_ptr(),
+            libc::AT_FDCWD,
+            cdst.as_ptr(),
+        )
+    })
+    .map(|_| ())
 }
 
 /// Creates dir (mode 0700) if missing; an existing entry must be a real
@@ -529,7 +585,9 @@ fn ensure_private_dir(dir: &Path, strict: bool) -> io::Result<()> {
 fn mount_top(path: &Path, dev: u64) -> PathBuf {
     let mut cur = path.parent().unwrap_or(path).to_path_buf();
     loop {
-        let Some(parent) = cur.parent() else { return cur };
+        let Some(parent) = cur.parent() else {
+            return cur;
+        };
         match std::fs::metadata(parent) {
             Ok(m) if m.dev() == dev => cur = parent.to_path_buf(),
             _ => return cur,
@@ -553,7 +611,15 @@ fn local_timestamp() -> String {
     let mut t: libc::time_t = unsafe { libc::time(std::ptr::null_mut()) };
     let mut tm: libc::tm = unsafe { std::mem::zeroed() };
     unsafe { libc::localtime_r(&mut t, &mut tm) };
-    format!("{:04}-{:02}-{:02}T{:02}:{:02}:{:02}", tm.tm_year + 1900, tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min, tm.tm_sec)
+    format!(
+        "{:04}-{:02}-{:02}T{:02}:{:02}:{:02}",
+        tm.tm_year + 1900,
+        tm.tm_mon + 1,
+        tm.tm_mday,
+        tm.tm_hour,
+        tm.tm_min,
+        tm.tm_sec
+    )
 }
 
 /// Moves path to the freedesktop.org trash: the home trash when on the same
@@ -565,7 +631,9 @@ pub fn trash(path: &Path, want: Expect) -> io::Result<()> {
     let data_home = match std::env::var_os("XDG_DATA_HOME").filter(|v| !v.is_empty()) {
         Some(d) => PathBuf::from(d),
         None => {
-            let home = std::env::var_os("HOME").filter(|v| !v.is_empty()).ok_or_else(|| other("$HOME is not defined"))?;
+            let home = std::env::var_os("HOME")
+                .filter(|v| !v.is_empty())
+                .ok_or_else(|| other("$HOME is not defined"))?;
             PathBuf::from(home).join(".local/share")
         }
     };
@@ -575,21 +643,31 @@ pub fn trash(path: &Path, want: Expect) -> io::Result<()> {
         _ => {
             let top = mount_top(path, dev);
             let rel = path.strip_prefix(&top).map_err(|e| other(e.to_string()))?;
-            (top.join(format!(".Trash-{}", unsafe { libc::getuid() })), rel.as_os_str().as_bytes().to_vec())
+            (
+                top.join(format!(".Trash-{}", unsafe { libc::getuid() })),
+                rel.as_os_str().as_bytes().to_vec(),
+            )
         }
     };
     let shared = trash != home;
     if !shared {
         use std::os::unix::fs::DirBuilderExt;
-        std::fs::DirBuilder::new().recursive(true).mode(0o700).create(&trash)?;
+        std::fs::DirBuilder::new()
+            .recursive(true)
+            .mode(0o700)
+            .create(&trash)?;
     } else if let Err(e) = ensure_private_dir(&trash, true) {
         // On a shared filesystem another user could plant a symlink or a
         // world-writable directory here; refuse rather than follow it.
-        return Err(other(format!("trash directory {} is unsafe: {e}", trash.display())));
+        return Err(other(format!(
+            "trash directory {} is unsafe: {e}",
+            trash.display()
+        )));
     }
     let (files, info) = (trash.join("files"), trash.join("info"));
     for d in [&files, &info] {
-        ensure_private_dir(d, shared).map_err(|e| other(format!("trash directory {} is unsafe: {e}", d.display())))?;
+        ensure_private_dir(d, shared)
+            .map_err(|e| other(format!("trash directory {} is unsafe: {e}", d.display())))?;
     }
     let base = path.file_name().ok_or_else(|| other("no file name"))?;
     for i in 1..10000 {
@@ -604,12 +682,23 @@ pub fn trash(path: &Path, want: Expect) -> io::Result<()> {
         let mut info_name = name.clone();
         info_name.push(".trashinfo");
         let ip = info.join(info_name);
-        let mut f = match std::fs::OpenOptions::new().write(true).create_new(true).mode(0o600).open(&ip) {
+        let mut f = match std::fs::OpenOptions::new()
+            .write(true)
+            .create_new(true)
+            .mode(0o600)
+            .open(&ip)
+        {
             Ok(f) => f,
             Err(e) if e.kind() == io::ErrorKind::AlreadyExists => continue,
             Err(e) => return Err(e),
         };
-        let w = write!(f, "[Trash Info]\nPath={}\nDeletionDate={}\n", percent_encode_path(&info_path), local_timestamp()).and_then(|_| f.sync_all());
+        let w = write!(
+            f,
+            "[Trash Info]\nPath={}\nDeletionDate={}\n",
+            percent_encode_path(&info_path),
+            local_timestamp()
+        )
+        .and_then(|_| f.sync_all());
         drop(f);
         if let Err(e) = w.and_then(|_| rename_checked(path, &dst, want)) {
             let _ = std::fs::remove_file(&ip);
@@ -638,7 +727,14 @@ mod tests {
         std::fs::write(d.join("sub/inner/f"), b"x").unwrap();
         let uid = unsafe { libc::getuid() };
         assert!(delete(&d.join("sub"), Expect { uid, mode: 0 }).is_err());
-        delete(&d.join("sub"), Expect { uid, mode: mode::DIR }).unwrap();
+        delete(
+            &d.join("sub"),
+            Expect {
+                uid,
+                mode: mode::DIR,
+            },
+        )
+        .unwrap();
         assert!(!d.join("sub").exists());
         std::fs::remove_dir_all(&d).unwrap();
     }

src/scan.rs

@@ -38,7 +38,9 @@ pub fn parse_follow(s: &str) -> Result<FollowMode, String> {
         "none" | "" => Ok(FollowMode::None),
         "same-filesystem" | "same-fs" => Ok(FollowMode::SameFs),
         "all" => Ok(FollowMode::All),
-        _ => Err(format!("invalid --follow-symlinks {s:?} (want none, same-filesystem or all)")),
+        _ => Err(format!(
+            "invalid --follow-symlinks {s:?} (want none, same-filesystem or all)"
+        )),
     }
 }
 
@@ -51,7 +53,9 @@ pub fn workers(mode: &str) -> Result<usize, String> {
         "aggressive" => Ok((8 * cpu).clamp(4, 64)),
         _ => match mode.trim().parse::<usize>() {
             Ok(n) if (1..=1024).contains(&n) => Ok(n),
-            _ => Err(format!("invalid workers {mode:?} (conservative, balanced, aggressive or 1-1024)")),
+            _ => Err(format!(
+                "invalid workers {mode:?} (conservative, balanced, aggressive or 1-1024)"
+            )),
         },
     }
 }
@@ -123,7 +127,10 @@ impl Scanner {
     }
 
     pub fn is_done(&self) -> bool {
-        matches!(self.done.try_recv(), Err(crossbeam_channel::TryRecvError::Disconnected))
+        matches!(
+            self.done.try_recv(),
+            Err(crossbeam_channel::TryRecvError::Disconnected)
+        )
     }
 
     /// Blocks until the scan is done.
@@ -235,7 +242,12 @@ pub fn start(root: &[u8], mut opts: Options, cancel: Cancel) -> io::Result<Scann
         t.stats.complete = true;
         t.stats.end = Some(SystemTime::now());
         drop(done_tx);
-        return Ok(Scanner { tree: Arc::new(RwLock::new(t)), counters, workers: opts.workers, done });
+        return Ok(Scanner {
+            tree: Arc::new(RwLock::new(t)),
+            counters,
+            workers: opts.workers,
+            done,
+        });
     }
     t.stats.dirs = 1;
     // Loop detection needs inode identity; without it symlinks are not
@@ -245,7 +257,11 @@ pub fn start(root: &[u8], mut opts: Options, cancel: Cancel) -> io::Result<Scann
         t.stats.follow = "none (no inode identity on this platform)".into();
     }
     let visited = (opts.follow != FollowMode::None).then(|| HashSet::from([(m.dev, m.ino)]));
-    let path_excludes = opts.excludes.iter().map(|p| (p.contains(['/', '\\']), p.as_bytes().to_vec())).collect();
+    let path_excludes = opts
+        .excludes
+        .iter()
+        .map(|p| (p.contains(['/', '\\']), p.as_bytes().to_vec()))
+        .collect();
     let tree = Arc::new(RwLock::new(t));
     let workers = opts.workers;
     counters.pending.store(1, Ordering::Relaxed);
@@ -259,11 +275,18 @@ pub fn start(root: &[u8], mut opts: Options, cancel: Cancel) -> io::Result<Scann
         links: HashSet::new(),
         visited,
     };
-    std::thread::Builder::new().name("scan-controller".into()).spawn(move || {
-        guard(|| c.run(cancel));
-        drop(done_tx);
-    })?;
-    Ok(Scanner { tree, counters, workers, done })
+    std::thread::Builder::new()
+        .name("scan-controller".into())
+        .spawn(move || {
+            guard(|| c.run(cancel));
+            drop(done_tx);
+        })?;
+    Ok(Scanner {
+        tree,
+        counters,
+        workers,
+        done,
+    })
 }
 
 /// Bounds how long the controller holds the write lock, so the UI's read
@@ -290,11 +313,23 @@ fn worker(cancel: &Cancel, jobs: Receiver<Arc<Job>>, results: Sender<ScanResult>
                 if cancel.is_cancelled() {
                     return Err(ReadErr::Cancelled);
                 }
-                results.send(ScanResult { job: j.clone(), entries: ms, is_final: false, err: None }).map_err(|_| ReadErr::Cancelled)
+                results
+                    .send(ScanResult {
+                        job: j.clone(),
+                        entries: ms,
+                        is_final: false,
+                        err: None,
+                    })
+                    .map_err(|_| ReadErr::Cancelled)
             })
             .err()
         };
-        let _ = results.send(ScanResult { job: j, entries: Vec::new(), is_final: true, err });
+        let _ = results.send(ScanResult {
+            job: j,
+            entries: Vec::new(),
+            is_final: true,
+            err,
+        });
     }
 }
 
@@ -304,7 +339,12 @@ impl Controller {
         let (res_tx, res_rx) = crossbeam_channel::bounded::<ScanResult>(self.opts.result_buf);
         let mut handles = Vec::with_capacity(self.opts.workers);
         for i in 0..self.opts.workers {
-            let (jobs, results, cancel, chunk) = (jobs_rx.clone(), res_tx.clone(), cancel.clone(), self.opts.chunk_size);
+            let (jobs, results, cancel, chunk) = (
+                jobs_rx.clone(),
+                res_tx.clone(),
+                cancel.clone(),
+                self.opts.chunk_size,
+            );
             handles.push(
                 std::thread::Builder::new()
                     .name(format!("scan-worker-{i}"))
@@ -332,7 +372,8 @@ impl Controller {
             let op = sel.select();
             let i = op.index();
             if Some(i) == send_i {
-                op.send(&jobs_tx, next.take().unwrap()).expect("workers alive");
+                op.send(&jobs_tx, next.take().unwrap())
+                    .expect("workers alive");
                 self.head += 1;
                 if self.head > 4096 && self.head * 2 > self.pending.len() {
                     self.pending.drain(..self.head);
@@ -366,7 +407,9 @@ impl Controller {
                 next = None;
             }
             self.counters.inflight.store(inflight, Ordering::Relaxed);
-            self.counters.pending.store((self.pending.len() - self.head) as i64, Ordering::Relaxed);
+            self.counters
+                .pending
+                .store((self.pending.len() - self.head) as i64, Ordering::Relaxed);
         }
         drop(jobs_tx);
         for h in handles {
@@ -391,7 +434,13 @@ impl Controller {
     fn make_job(&self, (id, dev): (NodeId, u64)) -> Arc<Job> {
         let path = self.tree.read().unwrap().path_bytes(id);
         let (in_cache, in_log) = inv::path_hints(&path);
-        Arc::new(Job { id, path, dev, in_cache, in_log })
+        Arc::new(Job {
+            id,
+            path,
+            dev,
+            in_cache,
+            in_log,
+        })
     }
 
     /// Merges one result into the tree. Reports whether the result completed
@@ -399,7 +448,9 @@ impl Controller {
     fn apply(&mut self, t: &mut Tree, r: ScanResult) -> bool {
         let j = &*r.job;
         let mut d = Delta::default();
-        self.counters.entries.fetch_add(r.entries.len() as i64, Ordering::Relaxed);
+        self.counters
+            .entries
+            .fetch_add(r.entries.len() as i64, Ordering::Relaxed);
         for m in r.entries {
             self.add_entry(t, j, m, &mut d);
         }
@@ -413,7 +464,12 @@ impl Controller {
                 }
                 Some(ReadErr::Io(e)) => {
                     dn.flags |= inv::FLAG_ERROR | inv::FLAG_INCOMPLETE;
-                    t.stats.add_error(ErrorRecord { node: j.id, kind: inv::classify(&e), msg: format!("open: {}", err_msg(&e)), ..Default::default() });
+                    t.stats.add_error(ErrorRecord {
+                        node: j.id,
+                        kind: inv::classify(&e),
+                        msg: format!("open: {}", err_msg(&e)),
+                        ..Default::default()
+                    });
                     d.errors += 1;
                 }
             }
@@ -427,7 +483,9 @@ impl Controller {
     fn excluded(&self, path: &[u8], name: &[u8]) -> bool {
         self.excludes.iter().any(|(is_path, p)| {
             if *is_path {
-                path == p.as_slice() || path.starts_with(p) && path.get(p.len()) == Some(&b'/') || platform::glob_match(p, path)
+                path == p.as_slice()
+                    || path.starts_with(p) && path.get(p.len()) == Some(&b'/')
+                    || platform::glob_match(p, path)
             } else {
                 platform::glob_match(p, name)
             }
@@ -438,7 +496,12 @@ impl Controller {
         if let Some(e) = &m.err {
             let k = inv::classify(e);
             if k == inv::ErrKind::Vanished {
-                t.stats.add_error(ErrorRecord { node: j.id, name: m.name, kind: k, msg: "vanished between listing and stat".into() });
+                t.stats.add_error(ErrorRecord {
+                    node: j.id,
+                    name: m.name,
+                    kind: k,
+                    msg: "vanished between listing and stat".into(),
+                });
                 d.errors += 1;
                 return;
             }
@@ -446,7 +509,12 @@ impl Controller {
             let n = t.node_mut(id);
             n.flags |= inv::FLAG_ERROR;
             n.errors = 1;
-            t.stats.add_error(ErrorRecord { node: id, kind: k, msg: format!("stat: {}", err_msg(e)), ..Default::default() });
+            t.stats.add_error(ErrorRecord {
+                node: id,
+                kind: k,
+                msg: format!("stat: {}", err_msg(e)),
+                ..Default::default()
+            });
             d.errors += 1;
             d.files += 1;
             t.stats.others += 1;
@@ -472,7 +540,12 @@ impl Controller {
                     t.stats.broken_links += 1;
                     broken = true;
                 }
-                Ok(tm) if platform::mode::is_dir(tm.mode) && tm.has_ino && (self.opts.follow == FollowMode::All || self.opts.follow == FollowMode::SameFs && tm.dev == j.dev) => {
+                Ok(tm)
+                    if platform::mode::is_dir(tm.mode)
+                        && tm.has_ino
+                        && (self.opts.follow == FollowMode::All
+                            || self.opts.follow == FollowMode::SameFs && tm.dev == j.dev) =>
+                {
                     target = Some(tm);
                     kind = Kind::Dir;
                 }
@@ -596,7 +669,11 @@ pub(crate) mod tests {
     impl TempDir {
         pub fn new(tag: &str) -> TempDir {
             static N: AtomicI64 = AtomicI64::new(0);
-            let p = std::env::temp_dir().join(format!("mapsize-{tag}-{}-{}", std::process::id(), N.fetch_add(1, Ordering::Relaxed)));
+            let p = std::env::temp_dir().join(format!(
+                "mapsize-{tag}-{}-{}",
+                std::process::id(),
+                N.fetch_add(1, Ordering::Relaxed)
+            ));
             std::fs::create_dir_all(&p).unwrap();
             TempDir(p)
         }
@@ -609,7 +686,14 @@ pub(crate) mod tests {
 
     /// Creates a fan-out tree: (files, dirs, bytes).
     pub fn mk_tree(dir: &Path, fanout: usize, depth: usize, files: usize) -> (i64, i64, i64) {
-        fn rec(dir: &Path, d: usize, fanout: usize, depth: usize, files: usize, acc: &mut (i64, i64, i64)) {
+        fn rec(
+            dir: &Path,
+            d: usize,
+            fanout: usize,
+            depth: usize,
+            files: usize,
+            acc: &mut (i64, i64, i64),
+        ) {
             for i in 0..files {
                 let sz = (i + 1) * 100;
                 std::fs::write(dir.join(format!("f{i}.txt")), vec![0u8; sz]).unwrap();
@@ -633,23 +717,38 @@ pub(crate) mod tests {
 
     pub fn run_scan(root: &Path, o: Options) -> Tree {
         let s = start(root.as_os_str().as_bytes(), o, Cancel::new()).unwrap();
-        s.done().recv_timeout(std::time::Duration::from_secs(60)).expect_err("scan did not finish (deadlock?)");
+        s.done()
+            .recv_timeout(std::time::Duration::from_secs(60))
+            .expect_err("scan did not finish (deadlock?)");
         let t = s.tree.read().unwrap().clone();
         t
     }
 
     fn totals(t: &Tree) -> Vec<[i64; 4]> {
-        (0..t.len() as NodeId).map(|i| t.node(i)).map(|n| [n.tot_size, n.tot_alloc, n.files as i64, n.dirs as i64]).collect()
+        (0..t.len() as NodeId)
+            .map(|i| t.node(i))
+            .map(|n| [n.tot_size, n.tot_alloc, n.files as i64, n.dirs as i64])
+            .collect()
     }
 
     #[test]
     fn counts_and_aggregates() {
         let root = TempDir::new("scan");
         let (nf, nd, bytes) = mk_tree(&root.0, 3, 3, 4);
-        let mut t = run_scan(&root.0, Options { workers: 4, ..Default::default() });
+        let mut t = run_scan(
+            &root.0,
+            Options {
+                workers: 4,
+                ..Default::default()
+            },
+        );
         let r = t.node(0);
         assert_eq!((r.files as i64, r.dirs as i64), (nf, nd));
-        let dir_bytes: i64 = (0..t.len() as NodeId).map(|i| t.node(i)).filter(|n| n.is_dir()).map(|n| n.size).sum();
+        let dir_bytes: i64 = (0..t.len() as NodeId)
+            .map(|i| t.node(i))
+            .filter(|n| n.is_dir())
+            .map(|n| n.size)
+            .sum();
         assert_eq!(r.tot_size, bytes + dir_bytes);
         assert!(t.stats.complete && !t.stats.incomplete());
         for i in 0..t.len() as NodeId {
@@ -661,7 +760,11 @@ pub(crate) mod tests {
         }
         let before = totals(&t);
         t.recompute();
-        assert_eq!(before, totals(&t), "incremental aggregates differ from recompute");
+        assert_eq!(
+            before,
+            totals(&t),
+            "incremental aggregates differ from recompute"
+        );
     }
 
     #[test]
@@ -669,8 +772,22 @@ pub(crate) mod tests {
         let root = TempDir::new("bp");
         let (nf, nd, _) = mk_tree(&root.0, 6, 4, 3);
         for w in [1, 2, 16] {
-            let t = run_scan(&root.0, Options { workers: w, job_buffer: 1, result_buf: 1, chunk_size: 1, apply_batch: 1, ..Default::default() });
-            assert_eq!((t.node(0).files as i64, t.node(0).dirs as i64), (nf, nd), "workers={w}");
+            let t = run_scan(
+                &root.0,
+                Options {
+                    workers: w,
+                    job_buffer: 1,
+                    result_buf: 1,
+                    chunk_size: 1,
+                    apply_batch: 1,
+                    ..Default::default()
+                },
+            );
+            assert_eq!(
+                (t.node(0).files as i64, t.node(0).dirs as i64),
+                (nf, nd),
+                "workers={w}"
+            );
         }
     }
 
@@ -679,9 +796,22 @@ pub(crate) mod tests {
         let root = TempDir::new("cancel");
         mk_tree(&root.0, 8, 3, 2);
         let c = Cancel::new();
-        let s = start(root.0.as_os_str().as_bytes(), Options { workers: 2, job_buffer: 1, result_buf: 1, chunk_size: 1, ..Default::default() }, c.clone()).unwrap();
+        let s = start(
+            root.0.as_os_str().as_bytes(),
+            Options {
+                workers: 2,
+                job_buffer: 1,
+                result_buf: 1,
+                chunk_size: 1,
+                ..Default::default()
+            },
+            c.clone(),
+        )
+        .unwrap();
         c.cancel();
-        s.done().recv_timeout(std::time::Duration::from_secs(10)).expect_err("cancel did not stop scan");
+        s.done()
+            .recv_timeout(std::time::Duration::from_secs(10))
+            .expect_err("cancel did not stop scan");
         let t = s.tree.read().unwrap();
         assert!(t.stats.cancelled && t.stats.incomplete());
     }
@@ -696,12 +826,21 @@ pub(crate) mod tests {
         std::os::unix::fs::symlink("../a", a.join("self")).unwrap();
         std::os::unix::fs::symlink("nowhere", root.0.join("broken")).unwrap();
         for f in [FollowMode::None, FollowMode::SameFs, FollowMode::All] {
-            let t = run_scan(&root.0, Options { workers: 4, follow: f, ..Default::default() });
+            let t = run_scan(
+                &root.0,
+                Options {
+                    workers: 4,
+                    follow: f,
+                    ..Default::default()
+                },
+            );
             let r = t.node(0);
             assert!(r.files > 0 && r.tot_size > 5000, "{f:?}");
             assert_eq!(t.stats.broken_links, 1);
             assert!(f == FollowMode::None || t.stats.loops_skipped > 0);
-            let count = (0..t.len() as NodeId).filter(|&i| &*t.node(i).name == b"x").count();
+            let count = (0..t.len() as NodeId)
+                .filter(|&i| &*t.node(i).name == b"x")
+                .count();
             assert_eq!(count, 1, "{f:?}");
         }
     }
@@ -713,7 +852,13 @@ pub(crate) mod tests {
         std::fs::write(&p, vec![0u8; 100000]).unwrap();
         std::fs::create_dir(root.0.join("d")).unwrap();
         std::fs::hard_link(&p, root.0.join("d/link")).unwrap();
-        let t = run_scan(&root.0, Options { workers: 2, ..Default::default() });
+        let t = run_scan(
+            &root.0,
+            Options {
+                workers: 2,
+                ..Default::default()
+            },
+        );
         assert_eq!(t.stats.hardlink_dups, 1);
         assert!(t.node(0).tot_size < 200000);
     }
@@ -729,7 +874,13 @@ pub(crate) mod tests {
         std::fs::create_dir(&locked).unwrap();
         std::fs::write(locked.join("f"), b"x").unwrap();
         std::fs::set_permissions(&locked, std::fs::Permissions::from_mode(0)).unwrap();
-        let t = run_scan(&root.0, Options { workers: 2, ..Default::default() });
+        let t = run_scan(
+            &root.0,
+            Options {
+                workers: 2,
+                ..Default::default()
+            },
+        );
         std::fs::set_permissions(&locked, std::fs::Permissions::from_mode(0o755)).unwrap();
         assert_eq!(t.stats.err_counts[inv::ErrKind::Permission as usize], 1);
         assert!(t.stats.incomplete());
@@ -745,18 +896,38 @@ pub(crate) mod tests {
         std::fs::write(root.0.join("keep/b.txt"), b"x").unwrap();
         std::fs::write(root.0.join("skip/c.txt"), b"x").unwrap();
         let skip = root.0.join("skip").to_string_lossy().into_owned();
-        let t = run_scan(&root.0, Options { workers: 2, excludes: vec!["*.tmp".into(), skip], ..Default::default() });
+        let t = run_scan(
+            &root.0,
+            Options {
+                workers: 2,
+                excludes: vec!["*.tmp".into(), skip],
+                ..Default::default()
+            },
+        );
         assert_eq!((t.stats.excluded, t.node(0).files), (2, 1));
     }
 
     #[test]
     fn hostile_names_preserved() {
         let root = TempDir::new("names");
-        let names: [&[u8]; 6] = ["日本語.txt".as_bytes(), "emoji-🎉.png".as_bytes(), b"esc\x1b[31mred", b"nl\nname", b"sp ace", b"bad\xffutf8"];
+        let names: [&[u8]; 6] = [
+            "日本語.txt".as_bytes(),
+            "emoji-🎉.png".as_bytes(),
+            b"esc\x1b[31mred",
+            b"nl\nname",
+            b"sp ace",
+            b"bad\xffutf8",
+        ];
         for n in names {
             std::fs::write(root.0.join(std::ffi::OsStr::from_bytes(n)), b"x").unwrap();
         }
-        let t = run_scan(&root.0, Options { workers: 2, ..Default::default() });
+        let t = run_scan(
+            &root.0,
+            Options {
+                workers: 2,
+                ..Default::default()
+            },
+        );
         let got: HashSet<&[u8]> = t.children(0).map(|(_, n)| &*n.name).collect();
         for n in names {
             assert!(got.contains(n), "missing {n:?}");

src/snapshot/compare.rs

@@ -28,7 +28,8 @@ pub fn compare(old: Tree, new: &Tree) -> Diff {
         if !old.node(o).is_dir() || !new.node(n).is_dir() {
             continue;
         }
-        let mut by_name: HashMap<&[u8], NodeId> = old.children(o).map(|(id, c)| (&c.name[..], id)).collect();
+        let mut by_name: HashMap<&[u8], NodeId> =
+            old.children(o).map(|(id, c)| (&c.name[..], id)).collect();
         for (id, c) in new.children(n) {
             if let Some(oid) = by_name.remove(&c.name[..]) {
                 stack.push((oid, id));
@@ -43,7 +44,12 @@ pub fn compare(old: Tree, new: &Tree) -> Diff {
         }
     }
     removed.sort_unstable();
-    Diff { old, old_of, removed, removed_under }
+    Diff {
+        old,
+        old_of,
+        removed,
+        removed_under,
+    }
 }
 
 /// Classifies a node.
@@ -115,7 +121,10 @@ impl Diff {
                 continue;
             }
             let n = new.node(id);
-            if self.old_of[id as usize] != NO_NODE && n.is_dir() && self.explained_by_child(new, id, delta, m) {
+            if self.old_of[id as usize] != NO_NODE
+                && n.is_dir()
+                && self.explained_by_child(new, id, delta, m)
+            {
                 continue;
             }
             if n.parent != NO_NODE && self.old_of[n.parent as usize] == NO_NODE {
@@ -132,9 +141,21 @@ impl Diff {
         }
         for &oid in &self.removed {
             let o = self.old.node(oid).total(m);
-            out.push(Change { path: self.old.path_string(oid), status: Status::Removed, delta: -o, old: o, new: 0, node: NO_NODE });
+            out.push(Change {
+                path: self.old.path_string(oid),
+                status: Status::Removed,
+                delta: -o,
+                old: o,
+                new: 0,
+                node: NO_NODE,
+            });
         }
-        out.sort_by(|a, b| b.delta.unsigned_abs().cmp(&a.delta.unsigned_abs()).then_with(|| a.path.cmp(&b.path)));
+        out.sort_by(|a, b| {
+            b.delta
+                .unsigned_abs()
+                .cmp(&a.delta.unsigned_abs())
+                .then_with(|| a.path.cmp(&b.path))
+        });
         if k > 0 {
             out.truncate(k);
         }

src/snapshot/mod.rs

@@ -31,7 +31,9 @@ mod compare;
 pub use compare::*;
 
 use crate::brand;
-use crate::inventory::{Category, ErrKind, ErrorRecord, Kind, NodeId, Tree, MAX_ERROR_RECORDS, NUM_CATEGORIES};
+use crate::inventory::{
+    Category, ErrKind, ErrorRecord, Kind, NodeId, Tree, MAX_ERROR_RECORDS, NUM_CATEGORIES,
+};
 use crossbeam_channel::Receiver;
 use flate2::{bufread::GzDecoder, write::GzEncoder, Compression};
 use serde::{Deserialize, Serialize};
@@ -91,7 +93,10 @@ struct Meta {
 /// Reports whether path starts with the snapshot magic.
 pub fn is_snapshot(path: &Path) -> bool {
     let mut b = [0u8; 8];
-    File::open(path).and_then(|mut f| f.read_exact(&mut b)).is_ok() && &b == brand::SNAPSHOT_MAGIC
+    File::open(path)
+        .and_then(|mut f| f.read_exact(&mut b))
+        .is_ok()
+        && &b == brand::SNAPSHOT_MAGIC
 }
 
 /// Accumulates the body; flushes it through the hash and gzip in chunks.
@@ -140,14 +145,21 @@ pub fn save(out: &mut dyn Write, t: &Tree) -> io::Result<()> {
     bw.write_all(brand::SNAPSHOT_MAGIC)?;
     bw.write_all(&VERSION.to_le_bytes())?;
     bw.write_all(&FLAG_GZIPPED.to_le_bytes())?;
-    let mut w = Writer { gz: GzEncoder::new(bw, Compression::fast()), h: Sha256::new(), buf: Vec::with_capacity(256 << 10) };
+    let mut w = Writer {
+        gz: GzEncoder::new(bw, Compression::fast()),
+        h: Sha256::new(),
+        buf: Vec::with_capacity(256 << 10),
+    };
 
     let st = &t.stats;
     let m = Meta {
         root: String::from_utf8_lossy(&st.root).into_owned(),
         created: GoTime::from_system(SystemTime::now()),
         start: GoTime::from_system(st.start).local(),
-        end: st.end.map(|e| GoTime::from_system(e).local()).unwrap_or_default(),
+        end: st
+            .end
+            .map(|e| GoTime::from_system(e).local())
+            .unwrap_or_default(),
         complete: st.complete,
         cancelled: st.cancelled,
         files: st.files,
@@ -223,16 +235,31 @@ pub fn save_file(path: &Path, t: &Tree) -> io::Result<()> {
 
 /// Creates a new 0600 file named .mapsize-*.tmp in dir (like os.CreateTemp).
 fn create_temp(dir: &Path) -> io::Result<(PathBuf, File)> {
-    let seed = SystemTime::now().duration_since(UNIX_EPOCH).unwrap_or_default().subsec_nanos() ^ std::process::id();
+    let seed = SystemTime::now()
+        .duration_since(UNIX_EPOCH)
+        .unwrap_or_default()
+        .subsec_nanos()
+        ^ std::process::id();
     for i in 0..10000u32 {
-        let p = dir.join(format!(".mapsize-{}.tmp", seed.wrapping_add(i.wrapping_mul(7919))));
-        match OpenOptions::new().write(true).create_new(true).mode(0o600).open(&p) {
+        let p = dir.join(format!(
+            ".mapsize-{}.tmp",
+            seed.wrapping_add(i.wrapping_mul(7919))
+        ));
+        match OpenOptions::new()
+            .write(true)
+            .create_new(true)
+            .mode(0o600)
+            .open(&p)
+        {
             Ok(f) => return Ok((p, f)),
             Err(e) if e.kind() == io::ErrorKind::AlreadyExists => continue,
             Err(e) => return Err(e),
         }
     }
-    Err(io::Error::new(io::ErrorKind::AlreadyExists, "snapshot: cannot create temporary file"))
+    Err(io::Error::new(
+        io::ErrorKind::AlreadyExists,
+        "snapshot: cannot create temporary file",
+    ))
 }
 
 fn hostname() -> String {
@@ -257,7 +284,12 @@ const UNEXPECTED_EOF: &str = "unexpected EOF";
 
 impl Body {
     fn new(rx: Receiver<Result<Vec<u8>, String>>) -> Body {
-        Body { rx, buf: Vec::new(), pos: 0, err: None }
+        Body {
+            rx,
+            buf: Vec::new(),
+            pos: 0,
+            err: None,
+        }
     }
 
     /// Ensures unread bytes are buffered; false at end of stream.
@@ -320,7 +352,8 @@ impl Body {
 
     fn bytes_n(&mut self, n: u64) -> Result<Vec<u8>, String> {
         let mut b = vec![0u8; n as usize];
-        self.read_full(&mut b).map_err(|e| format!("snapshot: truncated: {e}"))?;
+        self.read_full(&mut b)
+            .map_err(|e| format!("snapshot: truncated: {e}"))?;
         Ok(b)
     }
 
@@ -391,13 +424,16 @@ pub fn load_file(path: &Path) -> Result<Tree, crate::Error> {
 fn load_inner(input: impl Read, max_body: i64, max_nodes: u64) -> Result<Tree, String> {
     let mut br = BufReader::with_capacity(1 << 20, input);
     let mut hdr = [0u8; 12];
-    br.read_exact(&mut hdr).map_err(|_| "snapshot: file too short".to_string())?;
+    br.read_exact(&mut hdr)
+        .map_err(|_| "snapshot: file too short".to_string())?;
     if &hdr[..8] != brand::SNAPSHOT_MAGIC {
         return Err(format!("snapshot: not a {} snapshot", brand::NAME));
     }
     let v = u16::from_le_bytes([hdr[8], hdr[9]]);
     if v != VERSION {
-        return Err(format!("snapshot: unsupported version {v} (this build reads {VERSION})"));
+        return Err(format!(
+            "snapshot: unsupported version {v} (this build reads {VERSION})"
+        ));
     }
     if u16::from_le_bytes([hdr[10], hdr[11]]) & FLAG_GZIPPED == 0 {
         return Err("snapshot: uncompressed bodies are not supported".into());
@@ -436,13 +472,16 @@ fn load_inner(input: impl Read, max_body: i64, max_nodes: u64) -> Result<Tree, S
                 }
             }
             drop(tx);
-            parser.join().unwrap_or_else(|p| std::panic::resume_unwind(p))
+            parser
+                .join()
+                .unwrap_or_else(|p| std::panic::resume_unwind(p))
         })
     };
     let (mut t, m) = res?;
     // The checksum follows the gzip stream.
     let mut sum = [0u8; 32];
-    br.read_exact(&mut sum).map_err(|_| "snapshot: missing checksum".to_string())?;
+    br.read_exact(&mut sum)
+        .map_err(|_| "snapshot: missing checksum".to_string())?;
     if sum[..] != h.finalize()[..] {
         return Err("snapshot: checksum mismatch (file corrupt)".into());
     }
@@ -454,17 +493,36 @@ fn load_inner(input: impl Read, max_body: i64, max_nodes: u64) -> Result<Tree, S
     st.complete = true;
     st.cancelled = m.cancelled;
     (st.files, st.dirs, st.symlinks, st.others) = (m.files, m.dirs, m.symlinks, m.others);
-    for (d, s) in st.err_counts.iter_mut().zip(m.err_counts.unwrap_or_default()) {
+    for (d, s) in st
+        .err_counts
+        .iter_mut()
+        .zip(m.err_counts.unwrap_or_default())
+    {
         *d = s;
     }
-    (st.excluded, st.skipped_mounts, st.virtual_skipped) = (m.excluded, m.skipped_mounts, m.virtual_skipped);
-    (st.loops_skipped, st.broken_links, st.hardlink_dups, st.unscanned) =
-        (m.loops_skipped, m.broken_links, m.hardlink_dups, m.unscanned);
+    (st.excluded, st.skipped_mounts, st.virtual_skipped) =
+        (m.excluded, m.skipped_mounts, m.virtual_skipped);
+    (
+        st.loops_skipped,
+        st.broken_links,
+        st.hardlink_dups,
+        st.unscanned,
+    ) = (
+        m.loops_skipped,
+        m.broken_links,
+        m.hardlink_dups,
+        m.unscanned,
+    );
     st.excludes = m.excludes.unwrap_or_default();
     st.one_file_system = m.one_file_system;
     st.follow = m.follow;
     st.workers = m.workers.max(0) as usize;
-    st.from_snapshot = format!("{} ({}, {})", m.created.local_minutes(), m.host, m.generator);
+    st.from_snapshot = format!(
+        "{} ({}, {})",
+        m.created.local_minutes(),
+        m.host,
+        m.generator
+    );
     Ok(t)
 }
 
@@ -519,11 +577,16 @@ fn parse(r: &mut Body, max_nodes: u64) -> Result<(Tree, Meta), String> {
                 return Err(format!("snapshot: node {i}: parent is not a directory"));
             }
             if !valid_name(&name) {
-                return Err(format!("snapshot: node {i}: invalid name {:?}", String::from_utf8_lossy(&name)));
+                return Err(format!(
+                    "snapshot: node {i}: invalid name {:?}",
+                    String::from_utf8_lossy(&name)
+                ));
             }
             let d = depth[parent as usize] + 1;
             if d > MAX_DEPTH {
-                return Err(format!("snapshot: node {i}: deeper than {MAX_DEPTH} levels"));
+                return Err(format!(
+                    "snapshot: node {i}: deeper than {MAX_DEPTH} levels"
+                ));
             }
             depth.push(d);
             t.add(parent, &name, kind)
@@ -544,7 +607,12 @@ fn parse(r: &mut Body, max_nodes: u64) -> Result<(Tree, Meta), String> {
         let kind = ErrKind::from_u8(r.byte1()?); // out-of-range kinds become Other
         let name = r.str(MAX_NAME_LEN, "error name")?;
         let msg = String::from_utf8_lossy(&r.str(MAX_MSG_LEN, "error message")?).into_owned();
-        t.stats.errors.push(ErrorRecord { node, kind, name, msg });
+        t.stats.errors.push(ErrorRecord {
+            node,
+            kind,
+            name,
+            msg,
+        });
     }
     // The body must end here.
     if r.byte() != Err(EOF.into()) {
@@ -571,19 +639,35 @@ const GO_ZERO_SECS: i64 = -62_135_596_800;
 
 impl Default for GoTime {
     fn default() -> Self {
-        GoTime { secs: GO_ZERO_SECS, nanos: 0, off: 0 }
+        GoTime {
+            secs: GO_ZERO_SECS,
+            nanos: 0,
+            off: 0,
+        }
     }
 }
 
 impl GoTime {
     fn from_system(t: SystemTime) -> GoTime {
         match t.duration_since(UNIX_EPOCH) {
-            Ok(d) => GoTime { secs: d.as_secs() as i64, nanos: d.subsec_nanos(), off: 0 },
+            Ok(d) => GoTime {
+                secs: d.as_secs() as i64,
+                nanos: d.subsec_nanos(),
+                off: 0,
+            },
             Err(e) => {
                 let d = e.duration();
                 let (s, n) = (d.as_secs() as i64, d.subsec_nanos());
-                let (secs, nanos) = if n == 0 { (-s, 0) } else { (-s - 1, 1_000_000_000 - n) };
-                GoTime { secs, nanos, off: 0 }
+                let (secs, nanos) = if n == 0 {
+                    (-s, 0)
+                } else {
+                    (-s - 1, 1_000_000_000 - n)
+                };
+                GoTime {
+                    secs,
+                    nanos,
+                    off: 0,
+                }
             }
         }
     }
@@ -602,7 +686,8 @@ impl GoTime {
         if self.secs >= 0 {
             UNIX_EPOCH + Duration::new(self.secs as u64, self.nanos)
         } else {
-            UNIX_EPOCH - Duration::from_secs(self.secs.unsigned_abs()) + Duration::from_nanos(self.nanos as u64)
+            UNIX_EPOCH - Duration::from_secs(self.secs.unsigned_abs())
+                + Duration::from_nanos(self.nanos as u64)
         }
     }
 
@@ -611,7 +696,12 @@ impl GoTime {
         let secs = self.secs + self.off as i64;
         let (y, mo, d) = civil_from_days(secs.div_euclid(86400));
         let rem = secs.rem_euclid(86400);
-        let mut s = format!("{y:04}-{mo:02}-{d:02}T{:02}:{:02}:{:02}", rem / 3600, rem / 60 % 60, rem % 60);
+        let mut s = format!(
+            "{y:04}-{mo:02}-{d:02}T{:02}:{:02}:{:02}",
+            rem / 3600,
+            rem / 60 % 60,
+            rem % 60
+        );
         if self.nanos != 0 {
             s += format!(".{:09}", self.nanos).trim_end_matches('0');
         }
@@ -619,7 +709,12 @@ impl GoTime {
             return s + "Z";
         }
         let a = self.off.unsigned_abs() / 60;
-        format!("{s}{}{:02}:{:02}", if self.off < 0 { '-' } else { '+' }, a / 60, a % 60)
+        format!(
+            "{s}{}{:02}:{:02}",
+            if self.off < 0 { '-' } else { '+' },
+            a / 60,
+            a % 60
+        )
     }
 
     /// Parses RFC 3339 ("2026-10-08T10:40:00.123456789+01:00").
@@ -627,12 +722,27 @@ impl GoTime {
         let b = s.as_bytes();
         let num = |r: std::ops::Range<usize>| -> Option<i64> {
             let p = b.get(r)?;
-            p.iter().all(u8::is_ascii_digit).then(|| p.iter().fold(0i64, |a, &c| a * 10 + (c - b'0') as i64))
+            p.iter()
+                .all(u8::is_ascii_digit)
+                .then(|| p.iter().fold(0i64, |a, &c| a * 10 + (c - b'0') as i64))
         };
-        if b.len() < 20 || b[4] != b'-' || b[7] != b'-' || b[10] != b'T' || b[13] != b':' || b[16] != b':' {
+        if b.len() < 20
+            || b[4] != b'-'
+            || b[7] != b'-'
+            || b[10] != b'T'
+            || b[13] != b':'
+            || b[16] != b':'
+        {
             return None;
         }
-        let (y, mo, d, h, mi, se) = (num(0..4)?, num(5..7)?, num(8..10)?, num(11..13)?, num(14..16)?, num(17..19)?);
+        let (y, mo, d, h, mi, se) = (
+            num(0..4)?,
+            num(5..7)?,
+            num(8..10)?,
+            num(11..13)?,
+            num(14..16)?,
+            num(17..19)?,
+        );
         if !(1..=12).contains(&mo) || !(1..=31).contains(&d) || h > 23 || mi > 59 || se > 59 {
             return None;
         }
@@ -666,13 +776,26 @@ impl GoTime {
             _ => return None,
         };
         let secs = days_from_civil(y, mo, d) * 86400 + h * 3600 + mi * 60 + se - off;
-        Some(GoTime { secs, nanos, off: off as i32 })
+        Some(GoTime {
+            secs,
+            nanos,
+            off: off as i32,
+        })
     }
 
     /// "2006-01-02 15:04" in local time.
     fn local_minutes(self) -> String {
-        let Some(tm) = localtime(self.secs) else { return self.format() };
-        format!("{:04}-{:02}-{:02} {:02}:{:02}", tm.tm_year as i64 + 1900, tm.tm_mon + 1, tm.tm_mday, tm.tm_hour, tm.tm_min)
+        let Some(tm) = localtime(self.secs) else {
+            return self.format();
+        };
+        format!(
+            "{:04}-{:02}-{:02} {:02}:{:02}",
+            tm.tm_year as i64 + 1900,
+            tm.tm_mon + 1,
+            tm.tm_mday,
+            tm.tm_hour,
+            tm.tm_min
+        )
     }
 }
 
@@ -693,7 +816,8 @@ impl<'de> Deserialize<'de> for GoTime {
         // null leaves the zero time, as in Go.
         match Option::<String>::deserialize(d)? {
             None => Ok(GoTime::default()),
-            Some(s) => GoTime::parse(&s).ok_or_else(|| serde::de::Error::custom(format!("parsing time {s:?}"))),
+            Some(s) => GoTime::parse(&s)
+                .ok_or_else(|| serde::de::Error::custom(format!("parsing time {s:?}"))),
         }
     }
 }
@@ -737,7 +861,12 @@ mod tests {
         t.node_mut(f2).flags = FLAG_SPARSE;
         t.recompute();
         (t.stats.files, t.stats.dirs) = (2, 3);
-        t.stats.add_error(ErrorRecord { node: b, kind: ErrKind::Permission, msg: "denied".into(), ..Default::default() });
+        t.stats.add_error(ErrorRecord {
+            node: b,
+            kind: ErrKind::Permission,
+            msg: "denied".into(),
+            ..Default::default()
+        });
         t
     }
 
@@ -755,8 +884,12 @@ mod tests {
         for i in 0..src.len() as NodeId {
             let (a, b) = (src.node(i), got.node(i));
             assert!(
-                a.name == b.name && a.tot_size == b.tot_size && a.tot_alloc == b.tot_alloc && a.flags == b.flags
-                    && src.path(i) == got.path(i) && src.ext_name(a) == got.ext_name(b),
+                a.name == b.name
+                    && a.tot_size == b.tot_size
+                    && a.tot_alloc == b.tot_alloc
+                    && a.flags == b.flags
+                    && src.path(i) == got.path(i)
+                    && src.ext_name(a) == got.ext_name(b),
                 "node {i} differs: {a:?} vs {b:?}"
             );
         }
@@ -802,8 +935,14 @@ mod tests {
         assert_eq!(paths.get("/srv/a/x.iso"), Some(&Status::Grew), "{ch:?}");
         assert_eq!(paths.get("/srv/b"), Some(&Status::Removed), "{ch:?}");
         assert_eq!(paths.get("/srv/c"), Some(&Status::Added), "{ch:?}");
-        assert!(!paths.contains_key("/srv/a"), "/srv/a should be explained by its child");
-        assert!(!paths.contains_key("/srv/c/z"), "contents of new dirs should not be listed separately");
+        assert!(
+            !paths.contains_key("/srv/a"),
+            "/srv/a should be explained by its child"
+        );
+        assert!(
+            !paths.contains_key("/srv/c/z"),
+            "contents of new dirs should not be listed separately"
+        );
     }
 
     fn body(b: &[u8]) -> Body {
@@ -813,7 +952,11 @@ mod tests {
     }
 
     fn put_uvarint(v: u64) -> Vec<u8> {
-        let mut w = Writer { gz: GzEncoder::new(Vec::new(), Compression::fast()), h: Sha256::new(), buf: Vec::new() };
+        let mut w = Writer {
+            gz: GzEncoder::new(Vec::new(), Compression::fast()),
+            h: Sha256::new(),
+            buf: Vec::new(),
+        };
         w.uvarint(v).unwrap();
         w.buf
     }
@@ -824,7 +967,10 @@ mod tests {
             assert_eq!(read_uvarint(&mut body(&put_uvarint(v))), Ok(v));
         }
         assert_eq!(put_uvarint(300), [0xac, 0x02]);
-        assert!(read_uvarint(&mut body(&[0xff; 11])).is_err(), "overflow not detected");
+        assert!(
+            read_uvarint(&mut body(&[0xff; 11])).is_err(),
+            "overflow not detected"
+        );
         // Zig-zag as Go's PutVarint.
         for (v, enc) in [(0i64, 0u64), (-1, 1), (1, 2), (-2, 3), (i64::MIN, u64::MAX)] {
             assert_eq!(((v << 1) ^ (v >> 63)) as u64, enc);
@@ -837,13 +983,38 @@ mod tests {
         let t = GoTime::parse("2026-10-08T10:40:00.123456789+01:00").unwrap();
         assert_eq!((t.secs, t.nanos, t.off), (1_791_452_400, 123_456_789, 3600));
         assert_eq!(t.format(), "2026-10-08T10:40:00.123456789+01:00");
-        assert_eq!(GoTime { off: 0, ..t }.format(), "2026-10-08T09:40:00.123456789Z");
-        assert_eq!(GoTime { off: -5 * 3600 - 1800, ..t }.format(), "2026-10-08T04:10:00.123456789-05:30");
-        assert_eq!(GoTime::parse("2026-10-08T09:40:00.1Z").unwrap().format(), "2026-10-08T09:40:00.1Z");
-        assert_eq!(GoTime::parse("0001-01-01T00:00:00Z"), Some(GoTime::default()));
+        assert_eq!(
+            GoTime { off: 0, ..t }.format(),
+            "2026-10-08T09:40:00.123456789Z"
+        );
+        assert_eq!(
+            GoTime {
+                off: -5 * 3600 - 1800,
+                ..t
+            }
+            .format(),
+            "2026-10-08T04:10:00.123456789-05:30"
+        );
+        assert_eq!(
+            GoTime::parse("2026-10-08T09:40:00.1Z").unwrap().format(),
+            "2026-10-08T09:40:00.1Z"
+        );
+        assert_eq!(
+            GoTime::parse("0001-01-01T00:00:00Z"),
+            Some(GoTime::default())
+        );
         assert_eq!(GoTime::default().format(), "0001-01-01T00:00:00Z");
-        assert_eq!(GoTime::from_system(GoTime::default().to_system()), GoTime::default());
-        for bad in ["", "2026-10-08", "2026-13-08T00:00:00Z", "2026-10-08T00:00:00", "2026-10-08T00:00:00.Z"] {
+        assert_eq!(
+            GoTime::from_system(GoTime::default().to_system()),
+            GoTime::default()
+        );
+        for bad in [
+            "",
+            "2026-10-08",
+            "2026-13-08T00:00:00Z",
+            "2026-10-08T00:00:00",
+            "2026-10-08T00:00:00.Z",
+        ] {
             assert_eq!(GoTime::parse(bad), None, "{bad}");
         }
     }
@@ -852,21 +1023,34 @@ mod tests {
     /// (tree/{a/x.iso 10000 B, a/b/note.txt, c/y.log 3000 B, c/link -> ../a}).
     #[test]
     fn loads_go_snapshot() {
-        let t = load_file(Path::new(concat!(env!("CARGO_MANIFEST_DIR"), "/src/snapshot/testdata/go.msz"))).unwrap();
+        let t = load_file(Path::new(concat!(
+            env!("CARGO_MANIFEST_DIR"),
+            "/src/snapshot/testdata/go.msz"
+        )))
+        .unwrap();
         let r = t.node(0);
         assert_eq!((r.tot_size, r.tot_alloc), (13310, 20480));
         assert_eq!((t.stats.files, t.stats.dirs, t.stats.symlinks), (3, 4, 1));
         assert_eq!(t.len(), 8);
         assert!(t.stats.root.ends_with(b"/tree"));
         assert!(t.stats.end.is_some() && t.stats.complete);
-        assert!(t.stats.from_snapshot.contains("mapsize"), "{}", t.stats.from_snapshot);
-        let iso = (0..t.len() as NodeId).find(|&i| &t.node(i).name[..] == b"x.iso").unwrap();
+        assert!(
+            t.stats.from_snapshot.contains("mapsize"),
+            "{}",
+            t.stats.from_snapshot
+        );
+        let iso = (0..t.len() as NodeId)
+            .find(|&i| &t.node(i).name[..] == b"x.iso")
+            .unwrap();
         assert_eq!(t.node(iso).size, 10000);
         assert_eq!(t.ext_name(t.node(iso)), "iso");
         assert!(t.path_string(iso).ends_with("/tree/a/x.iso"));
         // And it survives a Rust round trip unchanged.
         let again = load(&saved(&t)[..]).unwrap();
-        assert_eq!((again.node(0).tot_size, again.len(), again.stats.start), (13310, 8, t.stats.start));
+        assert_eq!(
+            (again.node(0).tot_size, again.len(), again.stats.start),
+            (13310, 8, t.stats.start)
+        );
     }
 
     // Hostile input.
@@ -877,7 +1061,11 @@ mod tests {
         out.extend_from_slice(brand::SNAPSHOT_MAGIC);
         out.extend_from_slice(&VERSION.to_le_bytes());
         out.extend_from_slice(&FLAG_GZIPPED.to_le_bytes());
-        let mut w = Writer { gz: GzEncoder::new(out, Compression::best()), h: Sha256::new(), buf: Vec::new() };
+        let mut w = Writer {
+            gz: GzEncoder::new(out, Compression::best()),
+            h: Sha256::new(),
+            buf: Vec::new(),
+        };
         w.uvarint(meta.len() as u64).unwrap();
         w.bytes(meta.as_bytes()).unwrap();
         w.uvarint(1).unwrap();
@@ -908,49 +1096,80 @@ mod tests {
     }
 
     fn chain(n: usize) -> Vec<u8> {
-        craft(n, r#"{"root":"/r"}"#, |i, w| if i == 0 { node(w, 0, Kind::Dir, "", 0) } else { node(w, 1, Kind::Dir, "a", 0) })
+        craft(n, r#"{"root":"/r"}"#, |i, w| {
+            if i == 0 {
+                node(w, 0, Kind::Dir, "", 0)
+            } else {
+                node(w, 1, Kind::Dir, "a", 0)
+            }
+        })
     }
 
     #[test]
     fn deep_chain_rejected() {
         load(&chain(MAX_DEPTH as usize + 1)[..]).expect("depth at the limit must load");
-        let err = load(&chain(MAX_DEPTH as usize + 2)[..]).err().expect("over-deep chain accepted");
+        let err = load(&chain(MAX_DEPTH as usize + 2)[..])
+            .err()
+            .expect("over-deep chain accepted");
         assert!(err.to_string().contains("deeper"), "{err}");
     }
 
     #[test]
     fn decompression_bomb_limited() {
         let flat = craft(100_000, r#"{"root":"/r"}"#, |i, w| {
-            if i == 0 { node(w, 0, Kind::Dir, "", 0) } else { node(w, i as u64, Kind::File, "f", 0) }
+            if i == 0 {
+                node(w, 0, Kind::Dir, "", 0)
+            } else {
+                node(w, i as u64, Kind::File, "f", 0)
+            }
         });
-        let err = load_limit(&flat[..], 64 << 10).err().expect("bomb not limited");
+        let err = load_limit(&flat[..], 64 << 10)
+            .err()
+            .expect("bomb not limited");
         assert!(err.to_string().contains("limit"), "{err}");
-        assert!(body_limit(flat.len() as i64) >= 64 << 20, "body_limit floor");
+        assert!(
+            body_limit(flat.len() as i64) >= 64 << 20,
+            "body_limit floor"
+        );
     }
 
     #[test]
     fn huge_sizes_do_not_wrap() {
         let data = craft(3, r#"{"root":"/r"}"#, |i, w| {
-            if i == 0 { node(w, 0, Kind::Dir, "", 0) } else { node(w, i as u64, Kind::File, "f", MAX_SIZE) }
+            if i == 0 {
+                node(w, 0, Kind::Dir, "", 0)
+            } else {
+                node(w, i as u64, Kind::File, "f", MAX_SIZE)
+            }
         });
         let tr = load(&data[..]).unwrap();
         assert!(tr.node(0).tot_size >= 0, "aggregate wrapped negative");
         let over = craft(2, r#"{"root":"/r"}"#, |i, w| {
-            if i == 0 { node(w, 0, Kind::Dir, "", 0) } else { node(w, 1, Kind::File, "f", MAX_SIZE + 1) }
+            if i == 0 {
+                node(w, 0, Kind::Dir, "", 0)
+            } else {
+                node(w, 1, Kind::File, "f", MAX_SIZE + 1)
+            }
         });
         assert!(load(&over[..]).is_err(), "size above MAX_SIZE accepted");
     }
 
     #[test]
     fn hostile_metadata_sanitised_in_summary() {
-        let data = craft(1, r#"{"root":"/r\u001b[2J","excludes":["\u001b]0;PWNED\u0007"],"excluded":1}"#, |_, w| {
-            node(w, 0, Kind::Dir, "", 0)
-        });
+        let data = craft(
+            1,
+            r#"{"root":"/r\u001b[2J","excludes":["\u001b]0;PWNED\u0007"],"excluded":1}"#,
+            |_, w| node(w, 0, Kind::Dir, "", 0),
+        );
         let mut tr = load(&data[..]).unwrap();
         tr.stats.excluded = 1;
         let mut b = Vec::new();
         crate::export::summary(&mut b, &tr).unwrap();
-        assert!(!b.iter().any(|&c| c == 0x1b || c == 0x07), "raw control characters in summary: {:?}", String::from_utf8_lossy(&b));
+        assert!(
+            !b.iter().any(|&c| c == 0x1b || c == 0x07),
+            "raw control characters in summary: {:?}",
+            String::from_utf8_lossy(&b)
+        );
     }
 
     /// Blocks of one directory plus K-1 files repeat byte for byte, so a
@@ -971,7 +1190,9 @@ mod tests {
         fs::write(&p, &data).unwrap();
         let res = load_file(&p);
         let _ = fs::remove_file(&p);
-        let err = res.err().unwrap_or_else(|| panic!("{N} nodes from a {}-byte file accepted", data.len()));
+        let err = res
+            .err()
+            .unwrap_or_else(|| panic!("{N} nodes from a {}-byte file accepted", data.len()));
         assert!(err.to_string().contains("node count"), "{err}");
     }
 
@@ -983,7 +1204,11 @@ mod tests {
         save_file(&p, &sample()).unwrap();
         assert!(is_snapshot(&p));
         assert_eq!(load_file(&p).unwrap().len(), 5);
-        assert_eq!(fs::read_dir(&dir).unwrap().count(), 1, "temp file left behind");
+        assert_eq!(
+            fs::read_dir(&dir).unwrap().count(),
+            1,
+            "temp file left behind"
+        );
         fs::remove_dir_all(&dir).unwrap();
     }
 }

src/textutil.rs

@@ -41,7 +41,11 @@ pub fn sanitize(s: &str) -> String {
 }
 
 fn is_bidi_control(r: u32) -> bool {
-    (0x202a..=0x202e).contains(&r) || (0x2066..=0x2069).contains(&r) || r == 0x200e || r == 0x200f || r == 0x061c
+    (0x202a..=0x202e).contains(&r)
+        || (0x2066..=0x2069).contains(&r)
+        || r == 0x200e
+        || r == 0x200f
+        || r == 0x061c
 }
 
 /// Calls f for each grapheme cluster of s with its display width. Clusters
@@ -53,7 +57,11 @@ pub fn clusters(s: &str, mut f: impl FnMut(&str, usize) -> bool) {
     for c in s.graphemes(true) {
         let mut chars = c.chars();
         let first = chars.next().unwrap();
-        let w = if chars.next().is_none() { first.width().unwrap_or(0) } else { c.width() };
+        let w = if chars.next().is_none() {
+            first.width().unwrap_or(0)
+        } else {
+            c.width()
+        };
         if w == 0 {
             continue;
         }
@@ -171,7 +179,11 @@ const IEC_UNITS: [&str; 7] = ["B", "KiB", "MiB", "GiB", "TiB", "PiB", "EiB"];
 const SI_UNITS: [&str; 7] = ["B", "kB", "MB", "GB", "TB", "PB", "EB"];
 
 fn scaled(n: i64) -> (f64, &'static str) {
-    let (base, units) = if si() { (1000.0, &SI_UNITS) } else { (1024.0, &IEC_UNITS) };
+    let (base, units) = if si() {
+        (1000.0, &SI_UNITS)
+    } else {
+        (1024.0, &IEC_UNITS)
+    };
     let neg = n < 0;
     let mut v = (n as f64).abs();
     let mut i = 0;
@@ -295,7 +307,14 @@ mod tests {
 
     #[test]
     fn sizes() {
-        for (n, want) in [(0, "0 B"), (1023, "1023 B"), (1024, "1.00 KiB"), (1536, "1.50 KiB"), (181 << 30, "181 GiB"), (1 << 62, "4.00 EiB")] {
+        for (n, want) in [
+            (0, "0 B"),
+            (1023, "1023 B"),
+            (1024, "1.00 KiB"),
+            (1536, "1.50 KiB"),
+            (181 << 30, "181 GiB"),
+            (1 << 62, "4.00 EiB"),
+        ] {
             assert_eq!(size(n), want);
         }
         assert_eq!(count(2184392), "2,184,392");
@@ -330,7 +349,12 @@ pub fn rfc3339_utc(unix_nanos: i64) -> String {
     let d = doy - (153 * mp + 2) / 5 + 1;
     let m = if mp < 10 { mp + 3 } else { mp - 9 };
     let y = yoe + era * 400 + (m <= 2) as i64;
-    format!("{y:04}-{m:02}-{d:02}T{:02}:{:02}:{:02}Z", rem / 3600, rem / 60 % 60, rem % 60)
+    format!(
+        "{y:04}-{m:02}-{d:02}T{:02}:{:02}:{:02}Z",
+        rem / 3600,
+        rem / 60 % 60,
+        rem % 60
+    )
 }
 
 /// Formats a duration like Go's time.Duration.String after rounding to
@@ -365,7 +389,10 @@ mod time_tests {
     #[test]
     fn formats() {
         assert_eq!(rfc3339_utc(0), "1970-01-01T00:00:00Z");
-        assert_eq!(rfc3339_utc(1_791_456_000 * 1_000_000_000), "2026-10-08T10:40:00Z");
+        assert_eq!(
+            rfc3339_utc(1_791_456_000 * 1_000_000_000),
+            "2026-10-08T10:40:00Z"
+        );
         assert_eq!(go_duration(Duration::from_micros(1_234_400)), "1.234s");
         assert_eq!(go_duration(Duration::from_millis(250)), "250ms");
         assert_eq!(go_duration(Duration::from_millis(123_500)), "2m3.5s");

src/treemap/mod.rs

@@ -33,7 +33,12 @@ impl Rect {
 
     /// Shrinks by n cells on each side.
     pub fn inset(&self, n: i32) -> Rect {
-        Rect { x: self.x + n, y: self.y + n, w: (self.w - 2 * n).max(0), h: (self.h - 2 * n).max(0) }
+        Rect {
+            x: self.x + n,
+            y: self.y + n,
+            w: (self.w - 2 * n).max(0),
+            h: (self.h - 2 * n).max(0),
+        }
     }
 }
 
@@ -61,7 +66,11 @@ pub fn squarify(items: &[Item], bounds: Rect) -> Vec<Block> {
     if bounds.empty() {
         return Vec::new();
     }
-    let mut its: Vec<Item> = items.iter().copied().filter(|it| it.size > 0.0 && it.size.is_finite()).collect();
+    let mut its: Vec<Item> = items
+        .iter()
+        .copied()
+        .filter(|it| it.size > 0.0 && it.size.is_finite())
+        .collect();
     let total: f64 = its.iter().map(|it| it.size).sum();
     if its.is_empty() || total <= 0.0 {
         return Vec::new();
@@ -69,14 +78,28 @@ pub fn squarify(items: &[Item], bounds: Rect) -> Vec<Block> {
     its.sort_by(|a, b| b.size.total_cmp(&a.size).then(a.id.cmp(&b.id)));
     let scale = bounds.w as f64 * bounds.h as f64 / total;
     let areas: Vec<f64> = its.iter().map(|it| it.size * scale).collect();
-    let frs = layout(&areas, bounds.x as f64, bounds.y as f64, bounds.w as f64, bounds.h as f64);
+    let frs = layout(
+        &areas,
+        bounds.x as f64,
+        bounds.y as f64,
+        bounds.w as f64,
+        bounds.h as f64,
+    );
     let mut out = Vec::with_capacity(its.len());
     for (it, f) in its.iter().zip(frs) {
         let (x0, y0) = (f[0].round() as i32, f[1].round() as i32);
         let x1 = ((f[0] + f[2]).round() as i32).min(bounds.x + bounds.w);
         let y1 = ((f[1] + f[3]).round() as i32).min(bounds.y + bounds.h);
         if x1 > x0 && y1 > y0 {
-            out.push(Block { id: it.id, rect: Rect { x: x0, y: y0, w: x1 - x0, h: y1 - y0 } });
+            out.push(Block {
+                id: it.id,
+                rect: Rect {
+                    x: x0,
+                    y: y0,
+                    w: x1 - x0,
+                    h: y1 - y0,
+                },
+            });
         }
     }
     out
@@ -117,7 +140,11 @@ fn layout(areas: &[f64], mut x: f64, mut y: f64, mut w: f64, mut h: f64) -> Vec<
             }
             let mut yy = y;
             for k in i..j {
-                let hh = if k == j - 1 { y + h - yy } else { areas[k] / sum * h };
+                let hh = if k == j - 1 {
+                    y + h - yy
+                } else {
+                    areas[k] / sum * h
+                };
                 out[k] = [x, yy, thick, hh];
                 yy += hh;
             }
@@ -130,7 +157,11 @@ fn layout(areas: &[f64], mut x: f64, mut y: f64, mut w: f64, mut h: f64) -> Vec<
             }
             let mut xx = x;
             for k in i..j {
-                let ww = if k == j - 1 { x + w - xx } else { areas[k] / sum * w };
+                let ww = if k == j - 1 {
+                    x + w - xx
+                } else {
+                    areas[k] / sum * w
+                };
                 out[k] = [xx, y, ww, thick];
                 xx += ww;
             }
@@ -203,7 +234,10 @@ pub(crate) mod tests {
         for bl in blocks {
             let br = bl.rect;
             assert!(br.w > 0 && br.h > 0, "non-positive block {bl:?}");
-            assert!(br.x >= b.x && br.y >= b.y && br.x + br.w <= b.x + b.w && br.y + br.h <= b.y + b.h, "block {bl:?} outside bounds {b:?}");
+            assert!(
+                br.x >= b.x && br.y >= b.y && br.x + br.w <= b.x + b.w && br.y + br.h <= b.y + b.h,
+                "block {bl:?} outside bounds {b:?}"
+            );
             for y in br.y..br.y + br.h {
                 for x in br.x..br.x + br.w {
                     let i = ((y - b.y) * b.w + (x - b.x)) as usize;
@@ -222,7 +256,15 @@ pub(crate) mod tests {
     #[test]
     fn squarify_basic() {
         let b = r(2, 3, 60, 20);
-        let items = [it(1, 6.0), it(2, 6.0), it(3, 4.0), it(4, 3.0), it(5, 2.0), it(6, 2.0), it(7, 1.0)];
+        let items = [
+            it(1, 6.0),
+            it(2, 6.0),
+            it(3, 4.0),
+            it(4, 3.0),
+            it(5, 2.0),
+            it(6, 2.0),
+            it(7, 1.0),
+        ];
         let blocks = squarify(&items, b);
         assert_eq!(blocks.len(), items.len());
         check_partition(&blocks, b, true);
@@ -230,7 +272,11 @@ pub(crate) mod tests {
         for bl in &blocks {
             let want = b.area() as f64 * items[(bl.id - 1) as usize].size / 24.0;
             let got = bl.rect.area() as f64;
-            assert!(got >= want * 0.6 - 4.0 && got <= want * 1.4 + 4.0, "block {} area {got} want ~{want}", bl.id);
+            assert!(
+                got >= want * 0.6 - 4.0 && got <= want * 1.4 + 4.0,
+                "block {} area {got} want ~{want}",
+                bl.id
+            );
         }
         // Deterministic regardless of input order.
         let mut rev = items.to_vec();
@@ -241,9 +287,18 @@ pub(crate) mod tests {
     #[test]
     fn squarify_edge_cases() {
         assert!(squarify(&[], r(0, 0, 10, 10)).is_empty());
-        assert!(squarify(&[it(1, 0.0), it(2, -5.0)], r(0, 0, 10, 10)).is_empty(), "zero sizes should produce nothing");
+        assert!(
+            squarify(&[it(1, 0.0), it(2, -5.0)], r(0, 0, 10, 10)).is_empty(),
+            "zero sizes should produce nothing"
+        );
         assert!(squarify(&[it(1, f64::NAN), it(2, f64::INFINITY)], r(0, 0, 10, 10)).is_empty());
-        for b in [r(0, 0, 0, 0), r(0, 0, 1, 1), r(0, 0, 1, 50), r(0, 0, 50, 1), r(0, 0, -3, 4)] {
+        for b in [
+            r(0, 0, 0, 0),
+            r(0, 0, 1, 1),
+            r(0, 0, 1, 50),
+            r(0, 0, 50, 1),
+            r(0, 0, -3, 4),
+        ] {
             let bl = squarify(&[it(1, 5.0), it(2, 3.0), it(3, 1.0)], b);
             if !b.empty() {
                 check_partition(&bl, b, true);
@@ -258,7 +313,13 @@ pub(crate) mod tests {
     #[test]
     fn resize_recomputes() {
         let items = [it(1, 50.0), it(2, 30.0), it(3, 20.0)];
-        for b in [r(0, 0, 80, 24), r(0, 0, 120, 40), r(0, 0, 300, 80), r(0, 0, 70, 20), r(0, 0, 180, 50)] {
+        for b in [
+            r(0, 0, 80, 24),
+            r(0, 0, 120, 40),
+            r(0, 0, 300, 80),
+            r(0, 0, 70, 20),
+            r(0, 0, 180, 50),
+        ] {
             let bl = squarify(&items, b);
             check_partition(&bl, b, true);
             assert_eq!(bl.len(), 3, "{b:?}");
@@ -270,7 +331,11 @@ pub(crate) mod tests {
     fn squarify_random_partitions() {
         let mut rng = Rng::new(1);
         for _ in 0..300 {
-            let (w, h, n) = (rng.intn(400) as i32, rng.intn(150) as i32, rng.intn(3000) as usize);
+            let (w, h, n) = (
+                rng.intn(400) as i32,
+                rng.intn(150) as i32,
+                rng.intn(3000) as usize,
+            );
             let items: Vec<Item> = (0..n)
                 .map(|i| {
                     let bits = rng.intn(40) + 1;
@@ -290,12 +355,25 @@ pub(crate) mod tests {
         let sizes = [100.0, 50.0, 10.0, 1.0, 1.0, 1.0];
         assert_eq!(visible(&sizes, 163.0, 1630, 20, 100), 3);
         assert_eq!(visible(&sizes, 163.0, 1630, 20, 2), 2, "max_items");
-        assert_eq!(visible(&[10.0, 1.0], 11.0, 1100, 200, 10), 2, "single leftover");
+        assert_eq!(
+            visible(&[10.0, 1.0], 11.0, 1100, 200, 10),
+            2,
+            "single leftover"
+        );
     }
 
     #[test]
     fn at_finds_block() {
-        let bl = [Block { id: 1, rect: r(0, 0, 5, 5) }, Block { id: 2, rect: r(5, 0, 5, 5) }];
+        let bl = [
+            Block {
+                id: 1,
+                rect: r(0, 0, 5, 5),
+            },
+            Block {
+                id: 2,
+                rect: r(5, 0, 5, 5),
+            },
+        ];
         assert_eq!(at(&bl, 6, 2), Some(2));
         assert_eq!(at(&bl, 10, 2), None);
     }

src/treemap/nav.rs

@@ -33,10 +33,38 @@ pub fn neighbour(blocks: &[Block], sel: i64, d: Direction) -> Option<i64> {
         }
         let c = b.rect;
         let (ok, gap, lo, hi, clo, chi) = match d {
-            Direction::Right => (c.x >= s.x + s.w, c.x - (s.x + s.w), s.y, s.y + s.h, c.y, c.y + c.h),
-            Direction::Left => (c.x + c.w <= s.x, s.x - (c.x + c.w), s.y, s.y + s.h, c.y, c.y + c.h),
-            Direction::Down => (c.y >= s.y + s.h, c.y - (s.y + s.h), s.x, s.x + s.w, c.x, c.x + c.w),
-            Direction::Up => (c.y + c.h <= s.y, s.y - (c.y + c.h), s.x, s.x + s.w, c.x, c.x + c.w),
+            Direction::Right => (
+                c.x >= s.x + s.w,
+                c.x - (s.x + s.w),
+                s.y,
+                s.y + s.h,
+                c.y,
+                c.y + c.h,
+            ),
+            Direction::Left => (
+                c.x + c.w <= s.x,
+                s.x - (c.x + c.w),
+                s.y,
+                s.y + s.h,
+                c.y,
+                c.y + c.h,
+            ),
+            Direction::Down => (
+                c.y >= s.y + s.h,
+                c.y - (s.y + s.h),
+                s.x,
+                s.x + s.w,
+                c.x,
+                c.x + c.w,
+            ),
+            Direction::Up => (
+                c.y + c.h <= s.y,
+                s.y - (c.y + c.h),
+                s.x,
+                s.x + s.w,
+                c.x,
+                c.x + c.w,
+            ),
         };
         if !ok {
             continue;
@@ -68,7 +96,10 @@ mod tests {
     use super::Direction::*;
 
     fn blk(id: i64, x: i32, y: i32, w: i32, h: i32) -> Block {
-        Block { id, rect: r(x, y, w, h) }
+        Block {
+            id,
+            rect: r(x, y, w, h),
+        }
     }
 
     // Layout:
@@ -86,9 +117,18 @@ mod tests {
         let d = blk(4, 4, 4, 12, 4);
         let bs = [d, c, b, a]; // order must not matter
         let cases = [
-            (1, Right, Some(2)), (2, Left, Some(1)), (1, Down, Some(3)), (2, Down, Some(4)),
-            (3, Right, Some(4)), (4, Left, Some(3)), (3, Up, Some(1)), (4, Up, Some(2)),
-            (1, Left, None), (1, Up, None), (4, Right, None), (4, Down, None),
+            (1, Right, Some(2)),
+            (2, Left, Some(1)),
+            (1, Down, Some(3)),
+            (2, Down, Some(4)),
+            (3, Right, Some(4)),
+            (4, Left, Some(3)),
+            (3, Up, Some(1)),
+            (4, Up, Some(2)),
+            (1, Left, None),
+            (1, Up, None),
+            (4, Right, None),
+            (4, Down, None),
         ];
         for (from, dir, want) in cases {
             assert_eq!(neighbour(&bs, from, dir), want, "from {from} dir {dir:?}");
@@ -109,7 +149,11 @@ mod tests {
         let r1 = blk(11, 10, 0, 10, 3);
         let r2 = blk(12, 10, 3, 10, 3);
         let r3 = blk(13, 10, 6, 10, 3);
-        assert_eq!(neighbour(&[r3, r1, r2, t], 10, Right), Some(12), "centre preference");
+        assert_eq!(
+            neighbour(&[r3, r1, r2, t], 10, Right),
+            Some(12),
+            "centre preference"
+        );
         assert_eq!(neighbour(&[r3, r1, r2, t], 13, Left), Some(10), "back left");
     }
 
@@ -122,7 +166,9 @@ mod tests {
             let bl = squarify(&items, r(0, 0, 120, 40));
             for s in &bl {
                 for d in [Left, Right, Up, Down] {
-                    let Some(id) = neighbour(&bl, s.id, d) else { continue };
+                    let Some(id) = neighbour(&bl, s.id, d) else {
+                        continue;
+                    };
                     let c = bl.iter().find(|b| b.id == id).unwrap().rect;
                     let s = s.rect;
                     // In a partition, if any block touches the edge in direction d
@@ -133,7 +179,10 @@ mod tests {
                         Down => c.y == s.y + s.h,
                         Up => c.y + c.h == s.y,
                     };
-                    assert!(touch, "iter {iter}: from {s:?} dir {d:?} chose non-adjacent {c:?}");
+                    assert!(
+                        touch,
+                        "iter {iter}: from {s:?} dir {d:?} chose non-adjacent {c:?}"
+                    );
                 }
             }
         }

src/tui/actions.rs

@@ -36,11 +36,25 @@ impl Model {
         }
         let n = tr.node(id);
         let path = tr.path(id);
-        let want = Expect { uid: n.uid, mode: n.mode };
-        let what = if n.is_dir() { format!("directory with {} files", textutil::count(n.files as i64)) } else { "file".into() };
-        let mut body = vec![san(&tr.path_bytes(id)), String::new(), format!("{what} · {}", textutil::size(n.total(self.size_mode))), String::new()];
+        let want = Expect {
+            uid: n.uid,
+            mode: n.mode,
+        };
+        let what = if n.is_dir() {
+            format!("directory with {} files", textutil::count(n.files as i64))
+        } else {
+            "file".into()
+        };
+        let mut body = vec![
+            san(&tr.path_bytes(id)),
+            String::new(),
+            format!("{what} · {}", textutil::size(n.total(self.size_mode))),
+            String::new(),
+        ];
         if platform::headless() {
-            body.push("This is a headless system (no X or Wayland display), so there is no trash:".into());
+            body.push(
+                "This is a headless system (no X or Wayland display), so there is no trash:".into(),
+            );
             body.push("it will be permanently deleted and cannot be recovered.".into());
             self.open_modal(Box::new(ConfirmModal {
                 ttl: "Delete permanently? Are you sure?".into(),
@@ -50,13 +64,21 @@ impl Model {
                     let t = m.tree.clone();
                     Cmd::run(move || {
                         let err = platform::delete(&path, want).err().map(|e| e.to_string());
-                        Msg::TrashDone { tree: t, id, err, done: "Deleted".into() }
+                        Msg::TrashDone {
+                            tree: t,
+                            id,
+                            err,
+                            done: "Deleted".into(),
+                        }
                     })
                 })),
             }));
             return Cmd::None;
         }
-        body.push(format!("It will be moved to the {}, not permanently deleted.", platform::TRASH_NAME));
+        body.push(format!(
+            "It will be moved to the {}, not permanently deleted.",
+            platform::TRASH_NAME
+        ));
         self.open_modal(Box::new(ConfirmModal {
             ttl: "Move to trash?".into(),
             body,
@@ -65,14 +87,25 @@ impl Model {
                 let t = m.tree.clone();
                 Cmd::run(move || {
                     let err = platform::trash(&path, want).err().map(|e| e.to_string());
-                    Msg::TrashDone { tree: t, id, err, done: format!("Moved to {}", platform::TRASH_NAME) }
+                    Msg::TrashDone {
+                        tree: t,
+                        id,
+                        err,
+                        done: format!("Moved to {}", platform::TRASH_NAME),
+                    }
                 })
             })),
         }));
         Cmd::None
     }
 
-    pub fn trash_done(&mut self, tree: Arc<RwLock<Tree>>, id: NodeId, err: Option<String>, done: String) -> Cmd {
+    pub fn trash_done(
+        &mut self,
+        tree: Arc<RwLock<Tree>>,
+        id: NodeId,
+        err: Option<String>,
+        done: String,
+    ) -> Cmd {
         if let Some(e) = err {
             return self.warn(format!("Delete failed: {}", textutil::sanitize(&e)));
         }
@@ -84,7 +117,13 @@ impl Model {
         let name = {
             let mut t = self.tree.write().unwrap();
             let n = t.node(id).clone();
-            let mut d = Delta { size: -n.tot_size, alloc: -n.tot_alloc, files: -(n.files as i64), dirs: -(n.dirs as i64), ..Default::default() };
+            let mut d = Delta {
+                size: -n.tot_size,
+                alloc: -n.tot_alloc,
+                files: -(n.files as i64),
+                dirs: -(n.dirs as i64),
+                ..Default::default()
+            };
             if n.is_dir() {
                 d.dirs -= 1;
                 if let Some(cs) = t.cat_sizes(id) {
@@ -125,21 +164,38 @@ impl Model {
                 "Files are grouped by size, then sampled, then fully hashed with SHA-256.".into(),
                 "Only identical hashes are reported as duplicates.".into(),
                 String::new(),
-                "This reads file contents (it may take a while and can update access times).".into(),
+                "This reads file contents (it may take a while and can update access times)."
+                    .into(),
             ],
             yes: "start".into(),
             on_yes: Some(Box::new(|m: &mut Model| {
                 let cancel = Cancel::new();
                 let f = Arc::new(Finder::default());
-                m.dups = Some(DupState { running: true, finder: f.clone(), groups: Vec::new(), err: None, cancel: cancel.clone() });
+                m.dups = Some(DupState {
+                    running: true,
+                    finder: f.clone(),
+                    groups: Vec::new(),
+                    err: None,
+                    cancel: cancel.clone(),
+                });
                 m.ensure_dup_view();
                 let t = m.tree.clone();
                 let tick = m.start_ticking();
                 Cmd::batch(vec![
                     tick,
                     Cmd::run(move || {
-                        let g = f.find(&cancel, &t, duplicate::Options { min_size: 1, workers: 4 });
-                        Msg::DupDone { finder: f, groups: g }
+                        let g = f.find(
+                            &cancel,
+                            &t,
+                            duplicate::Options {
+                                min_size: 1,
+                                workers: 4,
+                            },
+                        );
+                        Msg::DupDone {
+                            finder: f,
+                            groups: g,
+                        }
                     }),
                 ])
             })),
@@ -148,22 +204,39 @@ impl Model {
     }
 
     pub fn ensure_dup_view(&mut self) {
-        if let Some(i) = self.views.iter().position(|v| matches!(v, super::views::View::Dups(_))) {
+        if let Some(i) = self
+            .views
+            .iter()
+            .position(|v| matches!(v, super::views::View::Dups(_)))
+        {
             self.set_view(i);
             return;
         }
-        self.views.push(super::views::View::Dups(DupView::default()));
+        self.views
+            .push(super::views::View::Dups(DupView::default()));
         self.set_view(self.views.len() - 1);
     }
 
     pub fn dup_done(&mut self, finder: Arc<Finder>, groups: Option<Vec<duplicate::Group>>) -> Cmd {
-        let Some(d) = self.dups.as_mut().filter(|d| Arc::ptr_eq(&d.finder, &finder)) else { return Cmd::None };
+        let Some(d) = self
+            .dups
+            .as_mut()
+            .filter(|d| Arc::ptr_eq(&d.finder, &finder))
+        else {
+            return Cmd::None;
+        };
         d.running = false;
         d.err = groups.is_none().then(|| "cancelled".to_string());
         d.groups = groups.unwrap_or_default();
-        let (n, wasted) = (d.groups.len(), d.groups.iter().map(|g| g.wasted()).sum::<i64>());
+        let (n, wasted) = (
+            d.groups.len(),
+            d.groups.iter().map(|g| g.wasted()).sum::<i64>(),
+        );
         self.dirty = true;
-        self.info(format!("Duplicates: {n} verified groups, {} reclaimable", textutil::size(wasted)))
+        self.info(format!(
+            "Duplicates: {n} verified groups, {} reclaimable",
+            textutil::size(wasted)
+        ))
     }
 }
 
@@ -185,23 +258,53 @@ impl DupView {
     pub fn paint(&mut self, m: &mut Model, tr: &Tree, cv: &mut Canvas, r: Rect) {
         let t = m.theme.clone();
         let Some(d) = &m.dups else {
-            cv.text_centered(r.x, r.y + r.h / 2, r.w, "Press D to search for duplicates", t.muted());
+            cv.text_centered(
+                r.x,
+                r.y + r.h / 2,
+                r.w,
+                "Press D to search for duplicates",
+                t.muted(),
+            );
             return;
         };
         if d.running {
             let p = d.finder.progress();
             cv.fill(r, " ", t.base());
             let y = r.y + r.h / 2 - 2;
-            cv.text_centered(r.x, y, r.w, &format!("Finding duplicates — {}…", p.stage), Style::new(t.accent, t.bg).with(BOLD));
-            cv.text_centered(r.x, y + 2, r.w,
-                &format!("{} candidate files in {} size groups", textutil::count(p.candidates), textutil::count(p.candidate_groups)), t.base());
+            cv.text_centered(
+                r.x,
+                y,
+                r.w,
+                &format!("Finding duplicates — {}…", p.stage),
+                Style::new(t.accent, t.bg).with(BOLD),
+            );
+            cv.text_centered(
+                r.x,
+                y + 2,
+                r.w,
+                &format!(
+                    "{} candidate files in {} size groups",
+                    textutil::count(p.candidates),
+                    textutil::count(p.candidate_groups)
+                ),
+                t.base(),
+            );
             if p.bytes_to_hash > 0 {
                 let frac = p.bytes_hashed as f64 / p.bytes_to_hash as f64;
                 let bw = 60.min(r.w - 10);
                 m.paint_bar(cv, r.x + (r.w - bw) / 2, y + 4, bw, frac, t.accent, false);
-                cv.text_centered(r.x, y + 5, r.w,
-                    &format!("{} of {} hashed · {} skipped", textutil::size(p.bytes_hashed), textutil::size(p.bytes_to_hash), textutil::count(p.skipped)),
-                    t.muted());
+                cv.text_centered(
+                    r.x,
+                    y + 5,
+                    r.w,
+                    &format!(
+                        "{} of {} hashed · {} skipped",
+                        textutil::size(p.bytes_hashed),
+                        textutil::size(p.bytes_to_hash),
+                        textutil::count(p.skipped)
+                    ),
+                    t.muted(),
+                );
             }
             return;
         }
@@ -211,22 +314,44 @@ impl DupView {
             self.rows.push((gi, NO_NODE));
             let hash: String = g.hash[..8].iter().map(|b| format!("{b:02x}")).collect();
             rows.push(TableRow {
-                cells: vec![textutil::size(g.wasted()), format!("{} × {}", g.files.len(), textutil::size(g.size)),
-                    format!("verified identical · sha256 {hash}…")],
-                styles: vec![Some(Style::new(t.warn, t.bg).with(BOLD)), Some(Style::new(t.fg, t.bg).with(BOLD)), Some(Style::new(t.ok, t.bg))],
+                cells: vec![
+                    textutil::size(g.wasted()),
+                    format!("{} × {}", g.files.len(), textutil::size(g.size)),
+                    format!("verified identical · sha256 {hash}…"),
+                ],
+                styles: vec![
+                    Some(Style::new(t.warn, t.bg).with(BOLD)),
+                    Some(Style::new(t.fg, t.bg).with(BOLD)),
+                    Some(Style::new(t.ok, t.bg)),
+                ],
                 bar: -1.0,
                 ..Default::default()
             });
             for &id in &g.files {
                 self.rows.push((gi, id));
-                rows.push(TableRow { cells: vec![String::new(), String::new(), format!("  {}", san(&tr.path_bytes(id)))], bar: -1.0, ..Default::default() });
+                rows.push(TableRow {
+                    cells: vec![
+                        String::new(),
+                        String::new(),
+                        format!("  {}", san(&tr.path_bytes(id))),
+                    ],
+                    bar: -1.0,
+                    ..Default::default()
+                });
             }
         }
-        let mut title = format!("Duplicates — {} groups (Enter details · Space go to)", d.groups.len());
+        let mut title = format!(
+            "Duplicates — {} groups (Enter details · Space go to)",
+            d.groups.len()
+        );
         if let Some(e) = &d.err {
             title += &format!(" — stopped: {}", textutil::sanitize(e));
         }
-        let cols = [col("WASTED", 10, true, false), col("COPIES", 16, false, false), col("", 0, false, false)];
+        let cols = [
+            col("WASTED", 10, true, false),
+            col("COPIES", 16, false, false),
+            col("", 0, false, false),
+        ];
         self.tb.paint(m, cv, r, &cols, &rows, &title);
     }
 

src/tui/canvas.rs

@@ -40,7 +40,11 @@ impl Color {
     }
 
     pub fn comps(self) -> (f64, f64, f64) {
-        (self.r() as f64 / 255.0, self.g() as f64 / 255.0, self.b() as f64 / 255.0)
+        (
+            self.r() as f64 / 255.0,
+            self.g() as f64 / 255.0,
+            self.b() as f64 / 255.0,
+        )
     }
 
     /// Blends c towards o by t (0..1). Default colours are returned as-is.
@@ -82,7 +86,10 @@ impl Style {
         Style { fg, bg, attr: 0 }
     }
     pub const fn with(self, a: Attr) -> Style {
-        Style { attr: self.attr | a, ..self }
+        Style {
+            attr: self.attr | a,
+            ..self
+        }
     }
 }
 
@@ -127,11 +134,46 @@ pub(crate) struct BoxChars {
     pub br: &'static str,
 }
 
-pub(crate) const BOX_LIGHT: BoxChars = BoxChars { h: "─", v: "│", tl: "┌", tr: "┐", bl: "└", br: "┘" };
-pub(crate) const BOX_ROUND: BoxChars = BoxChars { h: "─", v: "│", tl: "╭", tr: "╮", bl: "╰", br: "╯" };
-pub(crate) const BOX_DOUBLE: BoxChars = BoxChars { h: "═", v: "║", tl: "╔", tr: "╗", bl: "╚", br: "╝" };
-pub(crate) const BOX_ASCII: BoxChars = BoxChars { h: "-", v: "|", tl: "+", tr: "+", bl: "+", br: "+" };
-pub(crate) const BOX_ASCII_SEL: BoxChars = BoxChars { h: "=", v: "#", tl: "#", tr: "#", bl: "#", br: "#" };
+pub(crate) const BOX_LIGHT: BoxChars = BoxChars {
+    h: "─",
+    v: "│",
+    tl: "┌",
+    tr: "┐",
+    bl: "└",
+    br: "┘",
+};
+pub(crate) const BOX_ROUND: BoxChars = BoxChars {
+    h: "─",
+    v: "│",
+    tl: "╭",
+    tr: "╮",
+    bl: "╰",
+    br: "╯",
+};
+pub(crate) const BOX_DOUBLE: BoxChars = BoxChars {
+    h: "═",
+    v: "║",
+    tl: "╔",
+    tr: "╗",
+    bl: "╚",
+    br: "╝",
+};
+pub(crate) const BOX_ASCII: BoxChars = BoxChars {
+    h: "-",
+    v: "|",
+    tl: "+",
+    tr: "+",
+    bl: "+",
+    br: "+",
+};
+pub(crate) const BOX_ASCII_SEL: BoxChars = BoxChars {
+    h: "=",
+    v: "#",
+    tl: "#",
+    tr: "#",
+    bl: "#",
+    br: "#",
+};
 
 /// Selects how colours are serialised.
 #[derive(Clone, Copy, PartialEq, Eq, Debug)]
@@ -154,7 +196,12 @@ impl Canvas {
     /// Creates a canvas filled with spaces in style st.
     pub fn new(w: i32, h: i32, st: Style) -> Canvas {
         let (w, h) = (w.max(0), h.max(0));
-        Canvas { w, h, c: vec![Cell::space(st); (w * h) as usize], big: Vec::new() }
+        Canvas {
+            w,
+            h,
+            c: vec![Cell::space(st); (w * h) as usize],
+            big: Vec::new(),
+        }
     }
 
     fn inside(&self, x: i32, y: i32) -> bool {
@@ -180,7 +227,12 @@ impl Canvas {
             self.big.push(s.to_string());
             HEAP
         };
-        Cell { g, n, w: w as u8, st }
+        Cell {
+            g,
+            n,
+            w: w as u8,
+            st,
+        }
     }
 
     /// Writes one cluster of width w at (x, y), repairing any wide cluster
@@ -204,7 +256,12 @@ impl Canvas {
         }
         self.c[row + xu] = self.make(s, w, st);
         for i in 1..wu {
-            self.c[row + xu + i] = Cell { g: [0; INLINE], n: 0, w: 0, st };
+            self.c[row + xu + i] = Cell {
+                g: [0; INLINE],
+                n: 0,
+                w: 0,
+                st,
+            };
         }
     }
 
@@ -331,7 +388,13 @@ impl Canvas {
 
 fn sgr(b: &mut String, st: Style, depth: Depth) {
     b.push_str("\x1b[0");
-    for (bit, code) in [(BOLD, ";1"), (FAINT, ";2"), (ITALIC, ";3"), (UNDERLINE, ";4"), (REVERSE, ";7")] {
+    for (bit, code) in [
+        (BOLD, ";1"),
+        (FAINT, ";2"),
+        (ITALIC, ";3"),
+        (UNDERLINE, ";4"),
+        (REVERSE, ";7"),
+    ] {
         if st.attr & bit != 0 {
             b.push_str(code);
         }
@@ -351,7 +414,14 @@ fn sgr(b: &mut String, st: Style, depth: Depth) {
                 }
                 write!(b, ";{code}")
             }
-            Depth::True => write!(b, ";{};2;{};{};{}", if bg { 48 } else { 38 }, c.r(), c.g(), c.b()),
+            Depth::True => write!(
+                b,
+                ";{};2;{};{};{}",
+                if bg { 48 } else { 38 },
+                c.r(),
+                c.g(),
+                c.b()
+            ),
         };
     };
     col(b, st.fg, false);

src/tui/color256.rs

@@ -28,7 +28,11 @@ pub(crate) fn quant256(c: Color) -> u8 {
     let (r, g, b) = (c.r() as i32, c.g() as i32, c.b() as i32);
     let (mut best, mut best_d) = (16, i32::MAX);
     for i in 0..216 {
-        let (cr, cg, cb) = (CUBE_LEVELS[i / 36], CUBE_LEVELS[i / 6 % 6], CUBE_LEVELS[i % 6]);
+        let (cr, cg, cb) = (
+            CUBE_LEVELS[i / 36],
+            CUBE_LEVELS[i / 6 % 6],
+            CUBE_LEVELS[i % 6],
+        );
         let d = redmean(r, g, b, cr, cg, cb);
         if d < best_d {
             (best, best_d) = (16 + i, d);

src/tui/data.rs

@@ -39,8 +39,11 @@ impl Model {
         if let Some(k) = self.kids_cache.get(&id) {
             return k.clone();
         }
-        let mut v: Vec<(i64, NodeId)> =
-            tr.children(id).map(|(c, _)| (self.size_of(tr, c), c)).filter(|&(s, _)| s > 0).collect();
+        let mut v: Vec<(i64, NodeId)> = tr
+            .children(id)
+            .map(|(c, _)| (self.size_of(tr, c), c))
+            .filter(|&(s, _)| s > 0)
+            .collect();
         v.sort_unstable_by(|a, b| b.0.cmp(&a.0).then(a.1.cmp(&b.1)));
         let k = Rc::new(Kids {
             total: v.iter().map(|e| e.0).sum(),
@@ -119,7 +122,11 @@ impl Model {
         let prev = self.zoom;
         self.zoom = dir;
         // Coming back out, keep the directory we left selected.
-        self.sel = if tr.is_ancestor(dir, prev) { prev as i64 } else { NO_SEL };
+        self.sel = if tr.is_ancestor(dir, prev) {
+            prev as i64
+        } else {
+            NO_SEL
+        };
         self.user_sel = self.sel != NO_SEL;
         self.zoomed = true;
         self.dirty = true;

src/tui/infoview.rs

@@ -2,8 +2,8 @@
 
 use super::canvas::{Canvas, Style, BOLD};
 use super::model::{Cmd, Model};
-use super::table::{col, Table, TableRow};
 use super::san;
+use super::table::{col, Table, TableRow};
 use crate::inventory::{ErrKind, Tree, FLAG_ALLOC_UNKNOWN};
 use crate::textutil;
 use crate::treemap::Rect;
@@ -57,66 +57,193 @@ impl InfoView {
         } else {
             state
         };
-        cv.text(x, y, "SCAN INFORMATION", lw, Style::new(t.accent, t.bg).with(BOLD));
+        cv.text(
+            x,
+            y,
+            "SCAN INFORMATION",
+            lw,
+            Style::new(t.accent, t.bg).with(BOLD),
+        );
         y += 1;
         line(cv, &mut y, "Root", &san(&st.root), value);
         line(cv, &mut y, "State", state, state_st);
         if !st.from_snapshot.is_empty() {
-            line(cv, &mut y, "Snapshot", &textutil::sanitize(&st.from_snapshot), value);
+            line(
+                cv,
+                &mut y,
+                "Snapshot",
+                &textutil::sanitize(&st.from_snapshot),
+                value,
+            );
         }
         let files = st.files + st.symlinks + st.others;
-        line(cv, &mut y, "Items scanned", &textutil::count(files + st.dirs), value);
+        line(
+            cv,
+            &mut y,
+            "Items scanned",
+            &textutil::count(files + st.dirs),
+            value,
+        );
         line(cv, &mut y, "  Files", &textutil::count(st.files), value);
-        line(cv, &mut y, "  Directories", &textutil::count(st.dirs), value);
-        line(cv, &mut y, "  Symlinks", &textutil::count(st.symlinks), value);
+        line(
+            cv,
+            &mut y,
+            "  Directories",
+            &textutil::count(st.dirs),
+            value,
+        );
+        line(
+            cv,
+            &mut y,
+            "  Symlinks",
+            &textutil::count(st.symlinks),
+            value,
+        );
         line(cv, &mut y, "  Special", &textutil::count(st.others), value);
-        line(cv, &mut y, "Logical size", &format!("{}  ({} bytes)", textutil::size(root.tot_size), textutil::count(root.tot_size)), value);
-        line(cv, &mut y, "Allocated size", &format!("{}  ({} bytes)", textutil::size(root.tot_alloc), textutil::count(root.tot_alloc)), value);
+        line(
+            cv,
+            &mut y,
+            "Logical size",
+            &format!(
+                "{}  ({} bytes)",
+                textutil::size(root.tot_size),
+                textutil::count(root.tot_size)
+            ),
+            value,
+        );
+        line(
+            cv,
+            &mut y,
+            "Allocated size",
+            &format!(
+                "{}  ({} bytes)",
+                textutil::size(root.tot_alloc),
+                textutil::count(root.tot_alloc)
+            ),
+            value,
+        );
         let el = st.elapsed();
         if st.from_snapshot.is_empty() {
             line(cv, &mut y, "Elapsed", &textutil::duration(el), value);
             let rate = (files + st.dirs) as f64 / el.as_secs_f64().max(0.001);
-            line(cv, &mut y, "Rate", &(textutil::count(rate as i64) + " items/s"), value);
+            line(
+                cv,
+                &mut y,
+                "Rate",
+                &(textutil::count(rate as i64) + " items/s"),
+                value,
+            );
             let cpus = std::thread::available_parallelism().map_or(1, |n| n.get());
-            line(cv, &mut y, "Workers", &format!("{}  ({} CPUs)", st.workers, cpus), value);
+            line(
+                cv,
+                &mut y,
+                "Workers",
+                &format!("{}  ({} CPUs)", st.workers, cpus),
+                value,
+            );
         }
 
         head(cv, &mut y, "ERRORS AND OMISSIONS");
         let mut any_issue = false;
         for (k, &c) in st.err_counts.iter().enumerate() {
             if c > 0 {
-                line(cv, &mut y, ErrKind::from_u8(k as u8).name(), &textutil::count(c), Style::new(t.err, t.bg).with(BOLD));
+                line(
+                    cv,
+                    &mut y,
+                    ErrKind::from_u8(k as u8).name(),
+                    &textutil::count(c),
+                    Style::new(t.err, t.bg).with(BOLD),
+                );
                 any_issue = true;
             }
         }
-        for (k, v) in [("Unscanned dirs", st.unscanned), ("Excluded", st.excluded), ("Other FS skipped", st.skipped_mounts),
-            ("Virtual FS skipped", st.virtual_skipped), ("Loops skipped", st.loops_skipped), ("Broken symlinks", st.broken_links),
-            ("Hard-link dups", st.hardlink_dups)]
-        {
+        for (k, v) in [
+            ("Unscanned dirs", st.unscanned),
+            ("Excluded", st.excluded),
+            ("Other FS skipped", st.skipped_mounts),
+            ("Virtual FS skipped", st.virtual_skipped),
+            ("Loops skipped", st.loops_skipped),
+            ("Broken symlinks", st.broken_links),
+            ("Hard-link dups", st.hardlink_dups),
+        ] {
             if v > 0 {
-                line(cv, &mut y, k, &textutil::count(v), Style::new(t.warn, t.bg).with(BOLD));
+                line(
+                    cv,
+                    &mut y,
+                    k,
+                    &textutil::count(v),
+                    Style::new(t.warn, t.bg).with(BOLD),
+                );
                 any_issue = true;
             }
         }
         if !any_issue {
-            line(cv, &mut y, "None", "every entry was read", Style::new(t.ok, t.bg));
+            line(
+                cv,
+                &mut y,
+                "None",
+                "every entry was read",
+                Style::new(t.ok, t.bg),
+            );
         }
         head(cv, &mut y, "OPTIONS");
-        let excl = if st.excludes.is_empty() { "none".to_string() } else { textutil::sanitize(&st.excludes.join(", ")) };
+        let excl = if st.excludes.is_empty() {
+            "none".to_string()
+        } else {
+            textutil::sanitize(&st.excludes.join(", "))
+        };
         line(cv, &mut y, "Exclusions", &excl, value);
-        line(cv, &mut y, "One filesystem", &st.one_file_system.to_string(), value);
-        line(cv, &mut y, "Follow symlinks", &textutil::sanitize(&st.follow), value);
+        line(
+            cv,
+            &mut y,
+            "One filesystem",
+            &st.one_file_system.to_string(),
+            value,
+        );
+        line(
+            cv,
+            &mut y,
+            "Follow symlinks",
+            &textutil::sanitize(&st.follow),
+            value,
+        );
         line(cv, &mut y, "Size mode", m.size_mode.name(), value);
-        line(cv, &mut y, "Units", if crate::textutil::si() { "SI (1000)" } else { "IEC (1024)" }, value);
+        line(
+            cv,
+            &mut y,
+            "Units",
+            if crate::textutil::si() {
+                "SI (1000)"
+            } else {
+                "IEC (1024)"
+            },
+            value,
+        );
         if root.has(FLAG_ALLOC_UNKNOWN) {
-            line(cv, &mut y, "Note", "allocated size unavailable on this platform", Style::new(t.warn, t.bg));
+            line(
+                cv,
+                &mut y,
+                "Note",
+                "allocated size unavailable on this platform",
+                Style::new(t.warn, t.bg),
+            );
         }
 
         // Error list on the right (or below in narrow terminals).
         let er = if r.w < 100 {
-            Rect { x: r.x, y: y + 1, w: r.w, h: r.y + r.h - y - 1 }
+            Rect {
+                x: r.x,
+                y: y + 1,
+                w: r.w,
+                h: r.y + r.h - y - 1,
+            }
         } else {
-            Rect { x: r.x + lw + 4, y: r.y, w: r.w - lw - 4, h: r.h }
+            Rect {
+                x: r.x + lw + 4,
+                y: r.y,
+                w: r.w - lw - 4,
+                h: r.h,
+            }
         };
         if er.w < 30 || er.h < 4 {
             return;
@@ -132,7 +259,11 @@ impl InfoView {
                 }
                 TableRow {
                     cells: vec![e.kind.name().into(), san(&p), textutil::sanitize(&e.msg)],
-                    styles: vec![Some(Style::new(t.err, t.bg)), None, Some(Style::new(t.muted, t.bg))],
+                    styles: vec![
+                        Some(Style::new(t.err, t.bg)),
+                        None,
+                        Some(Style::new(t.muted, t.bg)),
+                    ],
                     bar: -1.0,
                     ..Default::default()
                 }
@@ -142,7 +273,11 @@ impl InfoView {
         if (st.errors.len() as i64) < st.total_errors() {
             title += &format!(" — first {} shown", textutil::count(st.errors.len() as i64));
         }
-        let cols = [col("KIND", 18, false, false), col("PATH", 0, false, true), col("DETAIL", 22, false, false)];
+        let cols = [
+            col("KIND", 18, false, false),
+            col("PATH", 0, false, true),
+            col("DETAIL", 22, false, false),
+        ];
         self.tb.paint(m, cv, er, &cols, &rows, &title);
     }
 

src/tui/keys.rs

@@ -1,7 +1,7 @@
 //! Key dispatch and the actions keys trigger.
 
-use super::model::{is_group, Cmd, Key, Model, Msg};
 use super::modals::{new_group_modal, new_help_modal, new_info_modal, new_save_modal};
+use super::model::{is_group, Cmd, Key, Model, Msg};
 use super::theme::{load_theme, theme_names};
 use super::views::View;
 use super::{fmt_stamp_now, san};
@@ -53,13 +53,19 @@ impl Model {
             }
             "tab" => self.set_view((self.view + 1) % self.views.len()),
             "shift+tab" => self.set_view((self.view + self.views.len() - 1) % self.views.len()),
-            "1" | "2" | "3" | "4" | "5" | "6" | "7" => self.set_view((k.as_bytes()[0] - b'1') as usize),
+            "1" | "2" | "3" | "4" | "5" | "6" | "7" => {
+                self.set_view((k.as_bytes()[0] - b'1') as usize)
+            }
             "enter" => return self.inspect_selection(&tr),
             "space" | "right" => return self.zoom_into_selection(&tr),
             "backspace" | "left" => self.zoom_out(&tr),
             "home" => self.zoom_to(&tr, 0),
             "a" => {
-                self.size_mode = if self.size_mode == SizeMode::Allocated { SizeMode::Logical } else { SizeMode::Allocated };
+                self.size_mode = if self.size_mode == SizeMode::Allocated {
+                    SizeMode::Logical
+                } else {
+                    SizeMode::Allocated
+                };
                 self.invalidate();
                 let mut cmds = Vec::new();
                 if self.search.query.is_some() {
@@ -88,7 +94,10 @@ impl Model {
             "d" | "delete" => return self.request_trash(&tr),
             "T" => {
                 let names = theme_names();
-                let cur = names.iter().position(|n| *n == self.theme.name).unwrap_or(0);
+                let cur = names
+                    .iter()
+                    .position(|n| *n == self.theme.name)
+                    .unwrap_or(0);
                 let ascii = self.theme.ascii;
                 let mut th = load_theme(names[(cur + 1) % names.len()], &self.opts.settings);
                 th.ascii = ascii;
@@ -200,7 +209,10 @@ impl Model {
             return self.info(msg);
         }
         if let Err(e) = platform::reveal(&tr.path(id)) {
-            return self.warn(format!("Open failed: {}", textutil::sanitize(&e.to_string())));
+            return self.warn(format!(
+                "Open failed: {}",
+                textutil::sanitize(&e.to_string())
+            ));
         }
         self.info("Opened in file manager")
     }
@@ -210,7 +222,9 @@ impl Model {
         Cmd::run(move || {
             let err = {
                 let g = t.read().unwrap();
-                snapshot::save_file(Path::new(&path), &g).err().map(|e| e.to_string())
+                snapshot::save_file(Path::new(&path), &g)
+                    .err()
+                    .map(|e| e.to_string())
             };
             Msg::SaveDone { path, err }
         })
@@ -224,5 +238,7 @@ pub(crate) fn default_snapshot_name(root: &[u8]) -> String {
         None => "root".into(),
     };
     let wd = std::env::current_dir().unwrap_or_default();
-    wd.join(format!("{base}-{}{}", fmt_stamp_now(), brand::SNAPSHOT_EXT)).to_string_lossy().into_owned()
+    wd.join(format!("{base}-{}{}", fmt_stamp_now(), brand::SNAPSHOT_EXT))
+        .to_string_lossy()
+        .into_owned()
 }

src/tui/mapview.rs

@@ -70,8 +70,14 @@ impl Model {
             }
         }
         let mut l = TmLayout {
-            zoom: self.zoom, rect: r, ver: self.data_ver, blocks: Vec::new(), nested: Vec::new(),
-            groups: HashMap::new(), visible: HashSet::new(), inner: HashSet::new(),
+            zoom: self.zoom,
+            rect: r,
+            ver: self.data_ver,
+            blocks: Vec::new(),
+            nested: Vec::new(),
+            groups: HashMap::new(),
+            visible: HashSet::new(),
+            inner: HashSet::new(),
         };
         l.blocks = self.layout_level(tr, &mut l, self.zoom, r, TOP_MIN_AREA, TOP_MAX_ITEMS);
         for i in 0..l.blocks.len() {
@@ -99,34 +105,87 @@ impl Model {
 
     /// Lays out the children of parent in r with level-of-detail grouping:
     /// children too small to be useful collapse into one group block.
-    fn layout_level(&mut self, tr: &Tree, l: &mut TmLayout, parent: NodeId, r: Rect, min_area: i32, max_items: usize) -> Vec<Block> {
+    fn layout_level(
+        &mut self,
+        tr: &Tree,
+        l: &mut TmLayout,
+        parent: NodeId,
+        r: Rect,
+        min_area: i32,
+        max_items: usize,
+    ) -> Vec<Block> {
         let k = self.kids_of(tr, parent);
         if k.ids.is_empty() || r.empty() {
             return Vec::new();
         }
         let sizes: Vec<f64> = k.sizes.iter().map(|&s| s as f64).collect();
         let vis = treemap::visible(&sizes, k.total as f64, r.area(), min_area, max_items);
-        let mut items: Vec<Item> = (0..vis).map(|i| Item { id: k.ids[i] as i64, size: sizes[i] }).collect();
+        let mut items: Vec<Item> = (0..vis)
+            .map(|i| Item {
+                id: k.ids[i] as i64,
+                size: sizes[i],
+            })
+            .collect();
         if vis < k.ids.len() {
             let size = k.sizes[vis..].iter().sum();
             let gid = group_id(parent);
-            l.groups.insert(gid, Group { parent, kids: k.clone(), from: vis, size });
-            items.push(Item { id: gid, size: size as f64 });
+            l.groups.insert(
+                gid,
+                Group {
+                    parent,
+                    kids: k.clone(),
+                    from: vis,
+                    size,
+                },
+            );
+            items.push(Item {
+                id: gid,
+                size: size as f64,
+            });
         }
         treemap::squarify(&items, r)
     }
 
     fn layout_nested(&mut self, tr: &Tree, l: &mut TmLayout, parent: NodeId, r: Rect, depth: i32) {
         // Deeper levels need bigger blocks to stay legible rather than noisy.
-        let blocks = self.layout_level(tr, l, parent, r, NEST_MIN_AREA * (depth - 1), NEST_MAX_ITEMS);
+        let blocks = self.layout_level(
+            tr,
+            l,
+            parent,
+            r,
+            NEST_MIN_AREA * (depth - 1),
+            NEST_MAX_ITEMS,
+        );
         for (i, b) in blocks.iter().enumerate() {
             let idx = l.nested.len();
-            l.nested.push(Nested { id: b.id, r: b.rect, depth, alt: i % 2 == 1, inner: false });
+            l.nested.push(Nested {
+                id: b.id,
+                r: b.rect,
+                depth,
+                alt: i % 2 == 1,
+                inner: false,
+            });
             let br = b.rect;
-            if depth < MAX_NEST_DEPTH && b.id >= 0 && br.w >= NEST_RECURSE_W && br.h >= NEST_RECURSE_H && tr.node(b.id as NodeId).is_dir() {
+            if depth < MAX_NEST_DEPTH
+                && b.id >= 0
+                && br.w >= NEST_RECURSE_W
+                && br.h >= NEST_RECURSE_H
+                && tr.node(b.id as NodeId).is_dir()
+            {
                 l.nested[idx].inner = true;
                 let end = self.chain_end(tr, b.id as NodeId);
-                self.layout_nested(tr, l, end, Rect { x: br.x, y: br.y + 1, w: br.w - 1, h: br.h - 2 }, depth + 1);
+                self.layout_nested(
+                    tr,
+                    l,
+                    end,
+                    Rect {
+                        x: br.x,
+                        y: br.y + 1,
+                        w: br.w - 1,
+                        h: br.h - 2,
+                    },
+                    depth + 1,
+                );
             }
         }
     }
@@ -182,7 +241,9 @@ impl Model {
     /// The size of the folder a block sits in.
     fn parent_size(&self, tr: &Tree, id: i64) -> i64 {
         if is_group(id) {
-            return self.group_info(id).map_or(0, |g| self.size_of(tr, g.parent));
+            return self
+                .group_info(id)
+                .map_or(0, |g| self.size_of(tr, g.parent));
         }
         let p = tr.node(id as NodeId).parent;
         if p != NO_NODE {
@@ -191,7 +252,15 @@ impl Model {
         0
     }
 
-    fn paint_top(&mut self, tr: &Tree, cv: &mut Canvas, b: Block, sel: bool, hov: bool, total: i64) {
+    fn paint_top(
+        &mut self,
+        tr: &Tree,
+        cv: &mut Canvas,
+        b: Block,
+        sel: bool,
+        hov: bool,
+        total: i64,
+    ) {
         let t = self.theme.clone();
         let base = self.color_of(tr, b.id);
         let fill = base.mix(t.bg, 0.62);
@@ -234,7 +303,13 @@ impl Model {
             title.attr = BOLD;
         }
         cv.draw_box(r, bx, frame);
-        cv.text(r.x + 1, r.y, &trunc(&format!(" {name} "), r.w - 2), r.w - 2, title);
+        cv.text(
+            r.x + 1,
+            r.y,
+            &trunc(&format!(" {name} "), r.w - 2),
+            r.w - 2,
+            title,
+        );
 
         let mut label = textutil::size(size);
         let pct = textutil::percent(size, total);
@@ -245,7 +320,17 @@ impl Model {
         }
         let label = format!(" {label} ");
         if r.h >= 3 && tw(&label) <= r.w - 2 {
-            cv.text_right(r.x + 1, r.y + r.h - 1, r.w - 2, &label, Style { fg: frame.fg, bg: fill, attr: frame.attr });
+            cv.text_right(
+                r.x + 1,
+                r.y + r.h - 1,
+                r.w - 2,
+                &label,
+                Style {
+                    fg: frame.fg,
+                    bg: fill,
+                    attr: frame.attr,
+                },
+            );
         }
         // Interior labels for blocks without nested previews.
         let inn = r.inset(1);
@@ -266,7 +351,13 @@ impl Model {
         }
         let y0 = inn.y + (inn.h - lines.len() as i32) / 2;
         for (i, s) in lines.iter().enumerate() {
-            cv.text_centered(inn.x, y0 + i as i32, inn.w, s, Style::new(base.mix(t.fg, 0.4), fill));
+            cv.text_centered(
+                inn.x,
+                y0 + i as i32,
+                inn.w,
+                s,
+                Style::new(base.mix(t.fg, 0.4), fill),
+            );
         }
     }
 
@@ -298,10 +389,28 @@ impl Model {
             }
         } else {
             if r.w >= 4 {
-                cv.fill(Rect { x: r.x + r.w - 1, y: r.y, w: 1, h: r.h }, " ", Style::new(Default::default(), shadow));
+                cv.fill(
+                    Rect {
+                        x: r.x + r.w - 1,
+                        y: r.y,
+                        w: 1,
+                        h: r.h,
+                    },
+                    " ",
+                    Style::new(Default::default(), shadow),
+                );
             }
             if r.h >= 3 {
-                cv.fill(Rect { x: r.x, y: r.y + r.h - 1, w: r.w, h: 1 }, " ", Style::new(Default::default(), shadow));
+                cv.fill(
+                    Rect {
+                        x: r.x,
+                        y: r.y + r.h - 1,
+                        w: r.w,
+                        h: 1,
+                    },
+                    " ",
+                    Style::new(Default::default(), shadow),
+                );
             }
         }
         let lw = if t.mono { r.w - 2 } else { r.w - 1 };
@@ -314,7 +423,13 @@ impl Model {
         if tw(&name) > lw && lw < 8 {
             return; // a stub like "te…" is noise, not information
         }
-        cv.text(lx, ly, &trunc(&name, lw), lw, Style::new(st.fg, bg).with(BOLD));
+        cv.text(
+            lx,
+            ly,
+            &trunc(&name, lw),
+            lw,
+            Style::new(st.fg, bg).with(BOLD),
+        );
         if !nb.inner && r.h >= 3 && lw >= 5 {
             let size = self.block_size(tr, nb.id);
             let mut label = textutil::size_compact(size);
@@ -322,7 +437,13 @@ impl Model {
             if tw(&label) + tw(&pct) + 3 <= lw {
                 label += &format!(" · {pct}");
             }
-            cv.text(lx, ly + 1, &trunc(&label, lw), lw, Style::new(bg.mix(st.fg, 0.7), bg));
+            cv.text(
+                lx,
+                ly + 1,
+                &trunc(&label, lw),
+                lw,
+                Style::new(bg.mix(st.fg, 0.7), bg),
+            );
         }
     }
 }
@@ -337,7 +458,11 @@ pub(crate) fn map_paint(m: &mut Model, tr: &Tree, cv: &mut Canvas, r: Rect) {
         } else if m.scanning {
             "Scanning…".to_string()
         } else if !z.is_dir() {
-            format!("{} — {}", san(&z.name), textutil::size(m.size_of(tr, m.zoom)))
+            format!(
+                "{} — {}",
+                san(&z.name),
+                textutil::size(m.size_of(tr, m.zoom))
+            )
         } else {
             "Empty directory".to_string()
         };
@@ -354,7 +479,10 @@ pub(crate) fn map_paint(m: &mut Model, tr: &Tree, cv: &mut Canvas, r: Rect) {
         m.paint_nested(tr, cv, nb);
     }
     for b in &l.blocks {
-        m.hits.push(Hit { r: b.rect, act: HitAct::Block(b.id) });
+        m.hits.push(Hit {
+            r: b.rect,
+            act: HitAct::Block(b.id),
+        });
     }
 }
 

src/tui/mod.rs

@@ -55,7 +55,6 @@ pub(crate) fn san(b: &[u8]) -> String {
     textutil::sanitize_bytes(b)
 }
 
-
 fn local_tm(unix_nanos: i64) -> libc::tm {
     let secs = unix_nanos.div_euclid(1_000_000_000) as libc::time_t;
     let mut tm: libc::tm = unsafe { std::mem::zeroed() };
@@ -66,18 +65,40 @@ fn local_tm(unix_nanos: i64) -> libc::tm {
 /// Formats a timestamp as a local date ("2006-01-02").
 pub(crate) fn fmt_date(unix_nanos: i64) -> String {
     let t = local_tm(unix_nanos);
-    format!("{:04}-{:02}-{:02}", t.tm_year + 1900, t.tm_mon + 1, t.tm_mday)
+    format!(
+        "{:04}-{:02}-{:02}",
+        t.tm_year + 1900,
+        t.tm_mon + 1,
+        t.tm_mday
+    )
 }
 
 /// Formats a timestamp as local date and time ("2006-01-02 15:04:05").
 pub(crate) fn fmt_time(unix_nanos: i64) -> String {
     let t = local_tm(unix_nanos);
-    format!("{:04}-{:02}-{:02} {:02}:{:02}:{:02}", t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, t.tm_hour, t.tm_min, t.tm_sec)
+    format!(
+        "{:04}-{:02}-{:02} {:02}:{:02}:{:02}",
+        t.tm_year + 1900,
+        t.tm_mon + 1,
+        t.tm_mday,
+        t.tm_hour,
+        t.tm_min,
+        t.tm_sec
+    )
 }
 
 /// The current local time as "20060102-1504".
 pub(crate) fn fmt_stamp_now() -> String {
-    let now = std::time::SystemTime::now().duration_since(std::time::UNIX_EPOCH).unwrap_or_default();
+    let now = std::time::SystemTime::now()
+        .duration_since(std::time::UNIX_EPOCH)
+        .unwrap_or_default();
     let t = local_tm(now.as_nanos() as i64);
-    format!("{:04}{:02}{:02}-{:02}{:02}", t.tm_year + 1900, t.tm_mon + 1, t.tm_mday, t.tm_hour, t.tm_min)
+    format!(
+        "{:04}{:02}{:02}-{:02}{:02}",
+        t.tm_year + 1900,
+        t.tm_mon + 1,
+        t.tm_mday,
+        t.tm_hour,
+        t.tm_min
+    )
 }

src/tui/modal.rs

@@ -17,15 +17,30 @@ pub(crate) struct Span {
 pub(crate) type Line = Vec<Span>;
 
 pub(crate) fn txt(s: impl Into<String>) -> Line {
-    vec![Span { s: s.into(), st: None }]
+    vec![Span {
+        s: s.into(),
+        st: None,
+    }]
 }
 
 pub(crate) fn styled(s: impl Into<String>, st: Style) -> Line {
-    vec![Span { s: s.into(), st: Some(st) }]
+    vec![Span {
+        s: s.into(),
+        st: Some(st),
+    }]
 }
 
 pub(crate) fn kv(k: &str, v: impl Into<String>, kst: Style, vst: Style) -> Line {
-    vec![Span { s: pad_right(k, 18), st: Some(kst) }, Span { s: v.into(), st: Some(vst) }]
+    vec![
+        Span {
+            s: pad_right(k, 18),
+            st: Some(kst),
+        },
+        Span {
+            s: v.into(),
+            st: Some(vst),
+        },
+    ]
 }
 
 /// An overlay. Modals receive all keys while open; Esc always closes them
@@ -61,7 +76,12 @@ impl ModalFrame {
 
 impl Model {
     pub fn open_modal(&mut self, md: Box<dyn Modal>) {
-        self.modals.push(ModalFrame { md, scroll: 0, view_h: 0, content_n: 0 });
+        self.modals.push(ModalFrame {
+            md,
+            scroll: 0,
+            view_h: 0,
+            content_n: 0,
+        });
         self.dirty = true;
     }
 
@@ -119,16 +139,24 @@ impl Model {
     pub fn paint_modal(&mut self, tr: &Tree, cv: &mut Canvas) {
         let t = self.theme.clone();
         // Dim everything underneath.
-        cv.restyle(Rect { x: 0, y: 0, w: cv.w, h: cv.h }, |mut s| {
-            if t.mono {
-                s.attr |= FAINT;
-                return s;
-            }
-            s.fg = s.fg.mix(t.bg, 0.6);
-            s.bg = s.bg.mix(rgb(0, 0, 0), 0.45);
-            s.attr &= !BOLD;
-            s
-        });
+        cv.restyle(
+            Rect {
+                x: 0,
+                y: 0,
+                w: cv.w,
+                h: cv.h,
+            },
+            |mut s| {
+                if t.mono {
+                    s.attr |= FAINT;
+                    return s;
+                }
+                s.fg = s.fg.mix(t.bg, 0.6);
+                s.bg = s.bg.mix(rgb(0, 0, 0), 0.45);
+                s.attr &= !BOLD;
+                s
+            },
+        );
         let mut f = self.modals.pop().unwrap();
         let max_w = cv.w - 2;
         let w = (f.md.width() + 4).min(max_w).max(30.min(max_w));
@@ -139,10 +167,16 @@ impl Model {
         if !foot.is_empty() {
             chrome += 2;
         }
-        let h = (lines.len() as i32 + chrome).min(cv.h - 2).max((chrome + 1).min(cv.h));
+        let h = (lines.len() as i32 + chrome)
+            .min(cv.h - 2)
+            .max((chrome + 1).min(cv.h));
         let (x0, y0) = ((cv.w - w) / 2, (cv.h - h) / 2);
         let r = Rect { x: x0, y: y0, w, h };
-        let bg = if t.panel_bg.is_default() { t.bg } else { t.panel_bg };
+        let bg = if t.panel_bg.is_default() {
+            t.bg
+        } else {
+            t.panel_bg
+        };
         let base = Style::new(t.fg, bg);
         // Drop shadow.
         if !t.mono {
@@ -150,13 +184,35 @@ impl Model {
                 s.bg = rgb(0, 0, 0);
                 s
             };
-            cv.restyle(Rect { x: x0 + 1, y: y0 + h, w, h: 1 }, black);
-            cv.restyle(Rect { x: x0 + w, y: y0 + 1, w: 1, h }, black);
+            cv.restyle(
+                Rect {
+                    x: x0 + 1,
+                    y: y0 + h,
+                    w,
+                    h: 1,
+                },
+                black,
+            );
+            cv.restyle(
+                Rect {
+                    x: x0 + w,
+                    y: y0 + 1,
+                    w: 1,
+                    h,
+                },
+                black,
+            );
         }
         cv.fill(r, " ", base);
         let border = Style::new(t.accent, bg).with(BOLD);
         cv.draw_box(r, if t.ascii { BOX_ASCII } else { BOX_ROUND }, border);
-        cv.text(x0 + 2, y0 + 1, &f.md.title().to_uppercase(), inner, Style::new(t.accent, bg).with(BOLD));
+        cv.text(
+            x0 + 2,
+            y0 + 1,
+            &f.md.title().to_uppercase(),
+            inner,
+            Style::new(t.accent, bg).with(BOLD),
+        );
         let rule = if t.ascii { "-" } else { "─" };
         cv.hline(x0 + 1, y0 + 2, w - 2, rule, Style::new(t.faint, bg));
         f.view_h = h - chrome;
@@ -201,7 +257,10 @@ impl Model {
         }
         self.modals.push(f);
         self.hits.clear();
-        self.hits.push(Hit { r, act: HitAct::None });
+        self.hits.push(Hit {
+            r,
+            act: HitAct::None,
+        });
     }
 }
 

src/tui/modals.rs

@@ -10,7 +10,10 @@ use super::search::LineEditor;
 use super::{fmt_time, pad_left, pad_right, san, trunc, tw};
 use crate::export;
 use crate::filter;
-use crate::inventory::{NodeId, Tree, FLAG_ALLOC_UNKNOWN, FLAG_HARDLINK_DUP, FLAG_INCOMPLETE, FLAG_LOOP, FLAG_SCANNED, FLAG_SKIPPED_FS, FLAG_SPARSE, FLAG_VIRTUAL_FS, NO_NODE};
+use crate::inventory::{
+    NodeId, Tree, FLAG_ALLOC_UNKNOWN, FLAG_HARDLINK_DUP, FLAG_INCOMPLETE, FLAG_LOOP, FLAG_SCANNED,
+    FLAG_SKIPPED_FS, FLAG_SPARSE, FLAG_VIRTUAL_FS, NO_NODE,
+};
 use crate::platform;
 use crate::textutil;
 
@@ -42,7 +45,10 @@ impl Modal for InfoModal {
     }
 
     fn footer(&self, m: &Model) -> String {
-        let mut s = format!("Esc close  ·  c copy path  ·  o {}  ·  Space go to", reveal_verb());
+        let mut s = format!(
+            "Esc close  ·  c copy path  ·  o {}  ·  Space go to",
+            reveal_verb()
+        );
         if !m.opts.read_only && !m.snapshot {
             s += &format!("  ·  d {}", delete_verb());
         }
@@ -71,25 +77,67 @@ impl Modal for InfoModal {
             out.push(styled(l, vs));
         }
         if san(&n.name).as_bytes() != &*n.name {
-            out.push(styled("Name contains control or invalid characters (shown escaped)", warn));
+            out.push(styled(
+                "Name contains control or invalid characters (shown escaped)",
+                warn,
+            ));
         }
         out.push(txt(""));
         let mode = m.size_mode;
         if n.is_dir() {
-            add_s(&mut out, "Total logical", format!("{}  ({} bytes)", textutil::size(n.tot_size), textutil::count(n.tot_size)), bold);
-            add_s(&mut out, "Total allocated", format!("{}  ({} bytes)", textutil::size(n.tot_alloc), textutil::count(n.tot_alloc)), bold);
+            add_s(
+                &mut out,
+                "Total logical",
+                format!(
+                    "{}  ({} bytes)",
+                    textutil::size(n.tot_size),
+                    textutil::count(n.tot_size)
+                ),
+                bold,
+            );
+            add_s(
+                &mut out,
+                "Total allocated",
+                format!(
+                    "{}  ({} bytes)",
+                    textutil::size(n.tot_alloc),
+                    textutil::count(n.tot_alloc)
+                ),
+                bold,
+            );
             add(&mut out, "Files", textutil::count(n.files as i64));
             add(&mut out, "Directories", textutil::count(n.dirs as i64));
             if n.parent != NO_NODE {
-                add(&mut out, "Of parent", textutil::percent(n.total(mode), tr.node(n.parent).total(mode)));
+                add(
+                    &mut out,
+                    "Of parent",
+                    textutil::percent(n.total(mode), tr.node(n.parent).total(mode)),
+                );
             }
-            add(&mut out, "Of scan", textutil::percent(n.total(mode), tr.node(0).total(mode)));
+            add(
+                &mut out,
+                "Of scan",
+                textutil::percent(n.total(mode), tr.node(0).total(mode)),
+            );
             let k = m.kids_of(tr, self.id);
             if let Some(&first) = k.ids.first() {
-                add(&mut out, "Largest child", format!("{} ({})", san(&tr.node(first).name), textutil::size(k.sizes[0])));
+                add(
+                    &mut out,
+                    "Largest child",
+                    format!(
+                        "{} ({})",
+                        san(&tr.node(first).name),
+                        textutil::size(k.sizes[0])
+                    ),
+                );
             }
             if n.errors > 0 {
-                add_s(&mut out, "Errors beneath", textutil::count(n.errors as i64), Style::new(t.err, Default::default()).with(BOLD));
+                add_s(
+                    &mut out,
+                    "Errors beneath",
+                    textutil::count(n.errors as i64),
+                    Style::new(t.err, Default::default()).with(BOLD),
+                );
             }
             let state = if n.has(FLAG_INCOMPLETE) {
                 "incomplete (not fully read)"
@@ -102,15 +150,32 @@ impl Modal for InfoModal {
             };
             add(&mut out, "Scan state", state.into());
         } else {
-            add_s(&mut out, "Logical size", format!("{}  ({} bytes)", textutil::size(n.size), textutil::count(n.size)), bold);
+            add_s(
+                &mut out,
+                "Logical size",
+                format!(
+                    "{}  ({} bytes)",
+                    textutil::size(n.size),
+                    textutil::count(n.size)
+                ),
+                bold,
+            );
             let alloc = if n.has(FLAG_ALLOC_UNKNOWN) {
                 "unknown on this platform".to_string()
             } else {
-                format!("{}  ({} bytes)", textutil::size(n.alloc), textutil::count(n.alloc))
+                format!(
+                    "{}  ({} bytes)",
+                    textutil::size(n.alloc),
+                    textutil::count(n.alloc)
+                )
             };
             add_s(&mut out, "Allocated size", alloc, bold);
             if n.parent != NO_NODE {
-                add(&mut out, "Of parent", textutil::percent(n.own(mode), tr.node(n.parent).total(mode)));
+                add(
+                    &mut out,
+                    "Of parent",
+                    textutil::percent(n.own(mode), tr.node(n.parent).total(mode)),
+                );
             }
         }
         if let Some(r) = &m.search.result {
@@ -120,9 +185,19 @@ impl Modal for InfoModal {
             match d.old_size(self.id, mode) {
                 Some(old) => {
                     add(&mut out, "In old snapshot", textutil::size(old));
-                    add_s(&mut out, "Change", textutil::signed_size(n.total(mode) - old), bold);
+                    add_s(
+                        &mut out,
+                        "Change",
+                        textutil::signed_size(n.total(mode) - old),
+                        bold,
+                    );
                 }
-                None => add_s(&mut out, "Change", "new since old snapshot".into(), Style::new(t.diff_new, Default::default()).with(BOLD)),
+                None => add_s(
+                    &mut out,
+                    "Change",
+                    "new since old snapshot".into(),
+                    Style::new(t.diff_new, Default::default()).with(BOLD),
+                ),
             }
         }
         out.push(txt(""));
@@ -143,12 +218,23 @@ impl Modal for InfoModal {
         }
         out.push(txt(""));
         add(&mut out, "Mode", platform::mode::string(n.mode));
-        add(&mut out, "Owner", textutil::sanitize(&platform::user_name(n.uid)));
-        add(&mut out, "Group", textutil::sanitize(&platform::group_name(n.gid)));
+        add(
+            &mut out,
+            "Owner",
+            textutil::sanitize(&platform::user_name(n.uid)),
+        );
+        add(
+            &mut out,
+            "Group",
+            textutil::sanitize(&platform::group_name(n.gid)),
+        );
         if !n.is_dir() {
             add(&mut out, "Hard links", n.nlink.to_string());
             let sparse = if n.has(FLAG_SPARSE) {
-                format!("Yes (or compressed) — {} not allocated", textutil::size(n.size - n.alloc))
+                format!(
+                    "Yes (or compressed) — {} not allocated",
+                    textutil::size(n.size - n.alloc)
+                )
             } else {
                 "No".into()
             };
@@ -159,11 +245,17 @@ impl Modal for InfoModal {
             add_s(&mut out, "Flags", fl.join(", "), warn);
         }
         if n.has(FLAG_HARDLINK_DUP) {
-            out.push(styled("Another path to this inode was counted; this one adds nothing to totals.", ks));
+            out.push(styled(
+                "Another path to this inode was counted; this one adds nothing to totals.",
+                ks,
+            ));
         }
         if m.snapshot {
             out.push(txt(""));
-            out.push(styled("From snapshot — metadata as recorded, not live.", ks));
+            out.push(styled(
+                "From snapshot — metadata as recorded, not live.",
+                ks,
+            ));
         }
         out
     }
@@ -216,13 +308,22 @@ impl Modal for GroupModal {
         let t = m.theme.clone();
         let ids = self.g.ids();
         let mut out = vec![
-            txt(format!("{} items too small to draw individually at this size,", textutil::count(ids.len() as i64))),
-            txt(format!("totalling {}. Zoom in or enlarge the terminal to see them.", textutil::size(self.g.size))),
+            txt(format!(
+                "{} items too small to draw individually at this size,",
+                textutil::count(ids.len() as i64)
+            )),
+            txt(format!(
+                "totalling {}. Zoom in or enlarge the terminal to see them.",
+                textutil::size(self.g.size)
+            )),
             txt(""),
         ];
         for (i, &id) in ids.iter().enumerate() {
             if i == 200 {
-                out.push(styled(format!("… and {} more", textutil::count(ids.len() as i64 - 200)), Style::new(t.muted, Default::default())));
+                out.push(styled(
+                    format!("… and {} more", textutil::count(ids.len() as i64 - 200)),
+                    Style::new(t.muted, Default::default()),
+                ));
                 break;
             }
             let n = tr.node(id);
@@ -231,8 +332,17 @@ impl Modal for GroupModal {
                 name.push('/');
             }
             out.push(vec![
-                Span { s: pad_left(&textutil::size(m.size_of(tr, id)), 11) + "  ", st: Some(Style::new(t.muted, Default::default())) },
-                Span { s: trunc(&name, w - 13), st: Some(Style::new(m.color_of(tr, id as i64).mix(t.fg, 0.4), Default::default())) },
+                Span {
+                    s: pad_left(&textutil::size(m.size_of(tr, id)), 11) + "  ",
+                    st: Some(Style::new(t.muted, Default::default())),
+                },
+                Span {
+                    s: trunc(&name, w - 13),
+                    st: Some(Style::new(
+                        m.color_of(tr, id as i64).mix(t.fg, 0.4),
+                        Default::default(),
+                    )),
+                },
             ]);
         }
         out
@@ -281,10 +391,23 @@ impl Modal for HelpModal {
             out.push(styled(s, h));
         };
         let row = |out: &mut Vec<Line>, keys: &str, desc: &str| {
-            out.push(vec![Span { s: format!("  {}", pad_right(keys, 19)), st: Some(k) }, Span { s: desc.into(), st: Some(d) }]);
+            out.push(vec![
+                Span {
+                    s: format!("  {}", pad_right(keys, 19)),
+                    st: Some(k),
+                },
+                Span {
+                    s: desc.into(),
+                    st: Some(d),
+                },
+            ]);
         };
         sec(&mut out, "NAVIGATION");
-        row(&mut out, "↑ ↓ ← →  hjkl", "move spatially through the treemap");
+        row(
+            &mut out,
+            "↑ ↓ ← →  hjkl",
+            "move spatially through the treemap",
+        );
         row(&mut out, "Enter", "inspect the selected item");
         row(&mut out, "Space  →", "zoom into the selected directory");
         row(&mut out, "Backspace  ←", "zoom out one level");
@@ -292,20 +415,43 @@ impl Modal for HelpModal {
         row(&mut out, "click / dbl-click", "select / zoom (mouse)");
         row(&mut out, "wheel", "zoom in/out (map), scroll (lists)");
         sec(&mut out, "SEARCH & FILTER");
-        row(&mut out, "/", "search or filter; the map shows only matches");
+        row(
+            &mut out,
+            "/",
+            "search or filter; the map shows only matches",
+        );
         row(&mut out, "Esc", "clear the filter");
-        out.push(styled("    ubuntu   *.iso   size > 5GB   ext IN (iso,qcow2)   age > 365d", muted));
-        out.push(styled("    path contains cache AND NOT type = dir   owner = andy   flag = sparse", muted));
+        out.push(styled(
+            "    ubuntu   *.iso   size > 5GB   ext IN (iso,qcow2)   age > 365d",
+            muted,
+        ));
+        out.push(styled(
+            "    path contains cache AND NOT type = dir   owner = andy   flag = sparse",
+            muted,
+        ));
         let fields: Vec<&str> = filter::FIELDS.split_whitespace().collect();
         let split = 7.min(fields.len());
-        out.push(styled(format!("    fields: {}", fields[..split].join(" ")), muted));
-        out.push(styled(format!("            {}", fields[split..].join(" ")), muted));
-        out.push(styled("    sizes: KiB/MiB/GiB (1024), kB/MB/GB (1000); ages: s min h d w mo y", muted));
+        out.push(styled(
+            format!("    fields: {}", fields[..split].join(" ")),
+            muted,
+        ));
+        out.push(styled(
+            format!("            {}", fields[split..].join(" ")),
+            muted,
+        ));
+        out.push(styled(
+            "    sizes: KiB/MiB/GiB (1024), kB/MB/GB (1000); ages: s min h d w mo y",
+            muted,
+        ));
         sec(&mut out, "VIEWS");
         row(&mut out, "Tab  Shift+Tab", "next / previous view");
         row(&mut out, "1 – 7", "jump to a view");
         row(&mut out, "x", "file types (extension statistics)");
-        row(&mut out, "g", "top lists: largest, oldest, sparse, hard links …");
+        row(
+            &mut out,
+            "g",
+            "top lists: largest, oldest, sparse, hard links …",
+        );
         row(&mut out, "e", "scan information and errors");
         row(&mut out, "D", "find duplicate files (reads file contents)");
         sec(&mut out, "APPLICATION");
@@ -321,8 +467,15 @@ impl Modal for HelpModal {
         row(&mut out, "Ctrl+C", "cancel scan; press again to quit");
         row(&mut out, "q", "quit");
         out.push(txt(""));
-        let units = if crate::textutil::si() { "SI (kB = 1000 bytes)" } else { "IEC (KiB = 1024 bytes)" };
-        out.push(styled(format!("Sizes: {} · units: {units}", m.size_mode.name()), muted));
+        let units = if crate::textutil::si() {
+            "SI (kB = 1000 bytes)"
+        } else {
+            "IEC (KiB = 1024 bytes)"
+        };
+        out.push(styled(
+            format!("Sizes: {} · units: {units}", m.size_mode.name()),
+            muted,
+        ));
         out
     }
 
@@ -371,7 +524,9 @@ struct SaveModal {
 }
 
 pub(crate) fn new_save_modal(tr: &Tree) -> Box<dyn Modal> {
-    let mut md = SaveModal { ed: LineEditor::default() };
+    let mut md = SaveModal {
+        ed: LineEditor::default(),
+    };
     md.ed.set(&default_snapshot_name(&tr.stats.root));
     Box::new(md)
 }
@@ -399,7 +554,10 @@ impl Modal for SaveModal {
         }
         if m.scanning {
             out.push(txt(""));
-            out.push(styled("The scan is still running: the snapshot will be marked incomplete.", Style::new(t.warn, Default::default())));
+            out.push(styled(
+                "The scan is still running: the snapshot will be marked incomplete.",
+                Style::new(t.warn, Default::default()),
+            ));
         }
         out
     }

src/tui/model.rs

@@ -32,7 +32,8 @@ use std::time::{Duration, Instant};
 
 /// Begins a scan (or returns a loaded tree with no scanner). Called again
 /// on rescan.
-pub type StartFn = Arc<dyn Fn(Cancel) -> Result<(Option<Scanner>, Arc<RwLock<Tree>>), crate::Error> + Send + Sync>;
+pub type StartFn =
+    Arc<dyn Fn(Cancel) -> Result<(Option<Scanner>, Arc<RwLock<Tree>>), crate::Error> + Send + Sync>;
 
 /// Configures the interactive session.
 pub struct Options {
@@ -75,7 +76,11 @@ impl Key {
             _ if s.chars().count() == 1 => s.to_string(),
             _ => String::new(),
         };
-        Key { name: s.to_string(), text, ctrl_alt: s.starts_with("ctrl+") || s.starts_with("alt+") }
+        Key {
+            name: s.to_string(),
+            text,
+            ctrl_alt: s.starts_with("ctrl+") || s.starts_with("alt+"),
+        }
     }
 }
 
@@ -91,15 +96,40 @@ pub(crate) enum Msg {
     Size(i32, i32),
     Tick,
     ScanDone(Arc<RwLock<Tree>>), // identifies the scan by its tree
-    Filter { gen: u64, res: Option<FilterResult> },
+    Filter {
+        gen: u64,
+        res: Option<FilterResult>,
+    },
     FilterDebounce(u64),
-    DupDone { finder: Arc<duplicate::Finder>, groups: Option<Vec<duplicate::Group>> },
-    TrashDone { tree: Arc<RwLock<Tree>>, id: NodeId, err: Option<String>, done: String },
-    SaveDone { path: String, err: Option<String> },
+    DupDone {
+        finder: Arc<duplicate::Finder>,
+        groups: Option<Vec<duplicate::Group>>,
+    },
+    TrashDone {
+        tree: Arc<RwLock<Tree>>,
+        id: NodeId,
+        err: Option<String>,
+        done: String,
+    },
+    SaveDone {
+        path: String,
+        err: Option<String>,
+    },
     Key(Key),
-    Click { x: i32, y: i32, button: Button },
-    Wheel { x: i32, y: i32, up: bool },
-    Motion { x: i32, y: i32 },
+    Click {
+        x: i32,
+        y: i32,
+        button: Button,
+    },
+    Wheel {
+        x: i32,
+        y: i32,
+        up: bool,
+    },
+    Motion {
+        x: i32,
+        y: i32,
+    },
     Quit, // SIGTERM
 }
 
@@ -239,8 +269,13 @@ impl Model {
         {
             theme.ascii = true;
         }
-        let mut views = vec![View::Map, View::List(Default::default()), View::Ext(Default::default()),
-            View::Top(Default::default()), View::Info(Default::default())];
+        let mut views = vec![
+            View::Map,
+            View::List(Default::default()),
+            View::Ext(Default::default()),
+            View::Top(Default::default()),
+            View::Info(Default::default()),
+        ];
         if opts.diff.is_some() {
             views.push(View::Changes(Default::default()));
         }
@@ -298,7 +333,9 @@ impl Model {
     }
 
     fn wait_scan(&self) -> Cmd {
-        let Some(s) = &self.scanner else { return Cmd::None };
+        let Some(s) = &self.scanner else {
+            return Cmd::None;
+        };
         let (rx, tree) = (s.done().clone(), s.tree.clone());
         Cmd::run(move || {
             let _ = rx.recv();
@@ -307,7 +344,11 @@ impl Model {
     }
 
     pub fn refresh_interval(&self) -> Duration {
-        let hz = if self.opts.settings.refresh_hz <= 0 { 10 } else { self.opts.settings.refresh_hz };
+        let hz = if self.opts.settings.refresh_hz <= 0 {
+            10
+        } else {
+            self.opts.settings.refresh_hz
+        };
         Duration::from_secs(1) / hz as u32
     }
 
@@ -321,7 +362,9 @@ impl Model {
     }
 
     fn needs_ticks(&self) -> bool {
-        self.scanning || Instant::now() < self.toast_until || self.dups.as_ref().is_some_and(|d| d.running)
+        self.scanning
+            || Instant::now() < self.toast_until
+            || self.dups.as_ref().is_some_and(|d| d.running)
     }
 
     /// Shows a transient status message.
@@ -366,7 +409,10 @@ impl Model {
                 self.ticking = false;
                 if self.scanning {
                     self.dirty = true;
-                    if self.last_data.is_none_or(|t| t.elapsed() >= Duration::from_millis(400)) {
+                    if self
+                        .last_data
+                        .is_none_or(|t| t.elapsed() >= Duration::from_millis(400))
+                    {
                         self.invalidate();
                         self.last_data = Some(Instant::now());
                     }
@@ -379,7 +425,10 @@ impl Model {
                 let mut cmds = Vec::new();
                 if self.scanning
                     && self.search.query.is_some()
-                    && self.search.applied_at.is_none_or(|t| t.elapsed() > Duration::from_secs(1))
+                    && self
+                        .search
+                        .applied_at
+                        .is_none_or(|t| t.elapsed() > Duration::from_secs(1))
                 {
                     cmds.push(self.apply_filter());
                 }
@@ -405,7 +454,12 @@ impl Model {
                 Cmd::None
             }
             Msg::DupDone { finder, groups } => self.dup_done(finder, groups),
-            Msg::TrashDone { tree, id, err, done } => self.trash_done(tree, id, err, done),
+            Msg::TrashDone {
+                tree,
+                id,
+                err,
+                done,
+            } => self.trash_done(tree, id, err, done),
             Msg::SaveDone { path, err } => match err {
                 Some(e) => self.warn(format!("Snapshot save failed: {}", textutil::sanitize(&e))),
                 None => self.info(format!("Saved snapshot {}", textutil::sanitize(&path))),
@@ -454,13 +508,24 @@ impl Model {
         let (total, files, dirs, errs, el, cancelled) = {
             let t = self.tree.read().unwrap();
             let st = &t.stats;
-            (t.node(0).total(self.size_mode), st.files + st.symlinks + st.others, st.dirs, st.total_errors(), st.elapsed(), st.cancelled)
+            (
+                t.node(0).total(self.size_mode),
+                st.files + st.symlinks + st.others,
+                st.dirs,
+                st.total_errors(),
+                st.elapsed(),
+                st.cancelled,
+            )
         };
         let mut cmds = Vec::new();
         let rate = (files + dirs) as f64 / el.as_secs_f64().max(0.001);
         let mut msg = format!(
             "✓ Scan complete  {}  ·  {} files  ·  {} dirs  ·  {}  ·  {}/s",
-            textutil::duration(el), textutil::count(files), textutil::count(dirs), textutil::size(total), textutil::count(rate as i64)
+            textutil::duration(el),
+            textutil::count(files),
+            textutil::count(dirs),
+            textutil::size(total),
+            textutil::count(rate as i64)
         );
         if cancelled {
             msg = "✗ Scan cancelled — totals are incomplete".into();
@@ -507,7 +572,10 @@ impl Model {
             Ok(v) => v,
             Err(e) => {
                 cancel.cancel();
-                return self.warn(format!("Rescan failed: {}", textutil::sanitize(&e.to_string())));
+                return self.warn(format!(
+                    "Rescan failed: {}",
+                    textutil::sanitize(&e.to_string())
+                ));
             }
         };
         self.scanning = s.is_some();
@@ -536,13 +604,18 @@ impl Model {
     /// Re-zooms into the remembered directory once the new scan has
     /// discovered it. Takes the read lock itself.
     pub fn resolve_pending_zoom(&mut self) {
-        let Some(pz) = self.pending_zoom.clone() else { return };
+        let Some(pz) = self.pending_zoom.clone() else {
+            return;
+        };
         let arc = self.tree.clone();
         let t = arc.read().unwrap();
         let root = t.path_bytes(0);
         let rel: &[u8] = if pz == root {
             b""
-        } else if let Some(r) = pz.strip_prefix(root.as_slice()).filter(|r| root.ends_with(b"/") || r.starts_with(b"/")) {
+        } else if let Some(r) = pz
+            .strip_prefix(root.as_slice())
+            .filter(|r| root.ends_with(b"/") || r.starts_with(b"/"))
+        {
             r
         } else {
             self.pending_zoom = None;

src/tui/mouse.rs

@@ -32,7 +32,8 @@ impl Model {
         for i in (0..self.hits.len()).rev() {
             if self.hits[i].r.contains(x, y) {
                 let key = (y as i64) << 32 | i as i64;
-                let double = self.last_click.is_some_and(|t| t.elapsed() < DOUBLE_CLICK) && self.last_click_i == key;
+                let double = self.last_click.is_some_and(|t| t.elapsed() < DOUBLE_CLICK)
+                    && self.last_click_i == key;
                 (self.last_click, self.last_click_i) = (Some(Instant::now()), key);
                 if double {
                     self.last_click_i = NO_SEL;

src/tui/render.rs

@@ -1,9 +1,9 @@
 //! Frame composition: panel geometry, tabs, breadcrumbs, info and status
 //! lines.
 
-use super::canvas::{Canvas, Color, Depth, Style, Attr, BOLD, REVERSE, UNDERLINE};
+use super::canvas::{Attr, Canvas, Color, Depth, Style, BOLD, REVERSE, UNDERLINE};
 use super::model::{is_group, Hit, HitAct, Model, Profile};
-use super::{fmt_date, san, tw, trunc_left};
+use super::{fmt_date, san, trunc_left, tw};
 use crate::brand;
 use crate::inventory::{Kind, Node, Tree, FLAG_SCANNED, NO_NODE};
 use crate::textutil;
@@ -46,21 +46,46 @@ pub(crate) fn compute_geometry(w: i32, h: i32) -> (SizeClass, Geometry) {
     };
     let mut y = 0;
     if class >= SizeClass::Medium {
-        g.tabs = Rect { x: 0, y: 0, w, h: 1 };
+        g.tabs = Rect {
+            x: 0,
+            y: 0,
+            w,
+            h: 1,
+        };
         y = 1;
     }
     g.crumbs = Rect { x: 0, y, w, h: 1 };
     y += 1;
     let mut bottom = h - 1;
-    g.stat = Rect { x: 0, y: h - 1, w, h: 1 };
+    g.stat = Rect {
+        x: 0,
+        y: h - 1,
+        w,
+        h: 1,
+    };
     if class >= SizeClass::Medium {
-        g.info = Rect { x: 0, y: h - 2, w, h: 1 };
+        g.info = Rect {
+            x: 0,
+            y: h - 2,
+            w,
+            h: 1,
+        };
         bottom = h - 2;
     }
-    g.main = Rect { x: 0, y, w, h: bottom - y };
+    g.main = Rect {
+        x: 0,
+        y,
+        w,
+        h: bottom - y,
+    };
     if class == SizeClass::Large {
         let sw = 40.min(w / 5);
-        g.side = Rect { x: 0, y, w: sw, h: g.main.h };
+        g.side = Rect {
+            x: 0,
+            y,
+            w: sw,
+            h: g.main.h,
+        };
         (g.main.x, g.main.w) = (sw, w - sw);
     }
     (class, g)
@@ -114,7 +139,11 @@ impl Model {
 
     fn render_too_small(&self, cv: &mut Canvas) {
         let st = self.theme.muted();
-        let lines = ["Terminal too small".to_string(), format!("{}×{} — need {}×{}", self.w, self.h, MIN_W, MIN_H), "q quits".to_string()];
+        let lines = [
+            "Terminal too small".to_string(),
+            format!("{}×{} — need {}×{}", self.w, self.h, MIN_W, MIN_H),
+            "q quits".to_string(),
+        ];
         let y0 = 0.max((self.h - lines.len() as i32) / 2);
         for (i, l) in lines.iter().enumerate() {
             cv.text_centered(0, y0 + i as i32, self.w, l, st);
@@ -133,8 +162,18 @@ impl Model {
     fn paint_tabs(&mut self, tr: &Tree, cv: &mut Canvas, r: Rect) {
         let t = self.theme.clone();
         cv.fill(r, " ", t.header());
-        let badge = if t.ascii { format!(" {} ", brand::NAME) } else { format!(" ◧ {} ", brand::NAME) };
-        let mut x = cv.text(r.x, r.y, &badge, r.w, Style::new(t.text_on(t.accent), t.accent).with(BOLD | self.mono_rev()));
+        let badge = if t.ascii {
+            format!(" {} ", brand::NAME)
+        } else {
+            format!(" ◧ {} ", brand::NAME)
+        };
+        let mut x = cv.text(
+            r.x,
+            r.y,
+            &badge,
+            r.w,
+            Style::new(t.text_on(t.accent), t.accent).with(BOLD | self.mono_rev()),
+        );
         x += 1;
         let names: Vec<&'static str> = self.views.iter().map(|v| v.name()).collect();
         for (i, name) in names.iter().enumerate() {
@@ -148,7 +187,10 @@ impl Model {
                 break;
             }
             let w = cv.text(x, r.y, &label, r.w - x, st);
-            self.hits.push(Hit { r: Rect { x, y: r.y, w, h: 1 }, act: HitAct::SetView(i) });
+            self.hits.push(Hit {
+                r: Rect { x, y: r.y, w, h: 1 },
+                act: HitAct::SetView(i),
+            });
             x += w;
         }
         // Right-aligned chips.
@@ -177,7 +219,13 @@ impl Model {
                 break;
             }
             rx -= w;
-            cv.text(rx, r.y, &s, w, Style::new(t.text_on(*bg), *bg).with(BOLD | self.mono_rev()));
+            cv.text(
+                rx,
+                r.y,
+                &s,
+                w,
+                Style::new(t.text_on(*bg), *bg).with(BOLD | self.mono_rev()),
+            );
             rx -= 1;
         }
     }
@@ -206,10 +254,20 @@ impl Model {
             right = format!(" {} ", textutil::size_compact(size));
             rw = tw(&right);
         }
-        cv.text_right(r.x, r.y, r.w, &right, Style::new(t.header_fg, t.header_bg).with(BOLD));
+        cv.text_right(
+            r.x,
+            r.y,
+            r.w,
+            &right,
+            Style::new(t.header_fg, t.header_bg).with(BOLD),
+        );
 
         let sep = if t.ascii { " > " } else { " › " };
-        let segs: Vec<(u32, String)> = tr.ancestors(self.zoom).into_iter().map(|id| (id, san(&tr.node(id).name))).collect();
+        let segs: Vec<(u32, String)> = tr
+            .ancestors(self.zoom)
+            .into_iter()
+            .map(|id| (id, san(&tr.node(id).name)))
+            .collect();
         let avail = r.w - rw - 2;
         // Drop leading segments until the rest fits; keep at least the last.
         let total = |from: usize| {
@@ -231,17 +289,40 @@ impl Model {
         }
         let mut x = r.x + 1;
         if from > 0 {
-            x += cv.text(x, r.y, &format!("…{sep}"), avail, Style::new(t.muted, t.header_bg));
+            x += cv.text(
+                x,
+                r.y,
+                &format!("…{sep}"),
+                avail,
+                Style::new(t.muted, t.header_bg),
+            );
         }
         for i in from..segs.len() {
             if i > from {
-                x += cv.text(x, r.y, sep, r.x + 1 + avail - x, Style::new(t.faint, t.header_bg));
+                x += cv.text(
+                    x,
+                    r.y,
+                    sep,
+                    r.x + 1 + avail - x,
+                    Style::new(t.faint, t.header_bg),
+                );
             }
             let last = i == segs.len() - 1;
-            let st = if last { Style::new(t.fg, t.header_bg).with(BOLD) } else { Style::new(t.muted, t.header_bg) };
-            let s = if last { trunc_left(&segs[i].1, 1.max(r.x + 1 + avail - x)) } else { segs[i].1.clone() };
+            let st = if last {
+                Style::new(t.fg, t.header_bg).with(BOLD)
+            } else {
+                Style::new(t.muted, t.header_bg)
+            };
+            let s = if last {
+                trunc_left(&segs[i].1, 1.max(r.x + 1 + avail - x))
+            } else {
+                segs[i].1.clone()
+            };
             let w = cv.text(x, r.y, &s, r.x + 1 + avail - x, st);
-            self.hits.push(Hit { r: Rect { x, y: r.y, w, h: 1 }, act: HitAct::ZoomTo(segs[i].0) });
+            self.hits.push(Hit {
+                r: Rect { x, y: r.y, w, h: 1 },
+                act: HitAct::ZoomTo(segs[i].0),
+            });
             x += w;
         }
     }
@@ -279,9 +360,14 @@ impl Model {
             return "Nothing selected".into();
         }
         let n = tr.node(id);
-        let mut parts = vec![format!("▸ {}", san(&n.name)), textutil::size(self.size_of(tr, id))];
+        let mut parts = vec![
+            format!("▸ {}", san(&n.name)),
+            textutil::size(self.size_of(tr, id)),
+        ];
         if n.parent != NO_NODE {
-            parts.push(textutil::percent(self.size_of(tr, id), self.size_of(tr, n.parent)) + " of parent");
+            parts.push(
+                textutil::percent(self.size_of(tr, id), self.size_of(tr, n.parent)) + " of parent",
+            );
         }
         if n.is_dir() {
             parts.push(textutil::count(n.files as i64) + " files");
@@ -308,8 +394,18 @@ impl Model {
     fn paint_status(&mut self, tr: &Tree, cv: &mut Canvas, r: Rect, class: SizeClass) {
         let t = self.theme.clone();
         cv.fill(r, " ", t.status());
-        let help = if class == SizeClass::Small { " ? " } else { " ? help " };
-        let hw = cv.text(r.x + r.w - tw(help), r.y, help, r.w, Style::new(t.muted, t.status_bg));
+        let help = if class == SizeClass::Small {
+            " ? "
+        } else {
+            " ? help "
+        };
+        let hw = cv.text(
+            r.x + r.w - tw(help),
+            r.y,
+            help,
+            r.w,
+            Style::new(t.muted, t.status_bg),
+        );
         let avail = r.w - hw - 1;
         if !self.toast.is_empty() {
             cv.text(r.x + 1, r.y, &self.toast, avail - 1, self.toast_style);
@@ -320,8 +416,15 @@ impl Model {
         let files = st.files + st.symlinks + st.others;
         let mut parts: Vec<(String, Color)> = Vec::new();
         if self.scanning {
-            let ms = std::time::SystemTime::now().duration_since(std::time::UNIX_EPOCH).unwrap_or_default().as_millis();
-            let frame = if t.ascii { "*" } else { SPINNER[(ms / 100) as usize % SPINNER.len()] };
+            let ms = std::time::SystemTime::now()
+                .duration_since(std::time::UNIX_EPOCH)
+                .unwrap_or_default()
+                .as_millis();
+            let frame = if t.ascii {
+                "*"
+            } else {
+                SPINNER[(ms / 100) as usize % SPINNER.len()]
+            };
             parts.push((format!("{frame} scanning"), t.accent));
         } else if st.cancelled {
             parts.push(("✗ cancelled".into(), t.warn));
@@ -334,8 +437,15 @@ impl Model {
         parts.push((textutil::size(root.total(self.size_mode)), t.status_fg));
         if self.scanning {
             let el = st.elapsed();
-            let p = self.scanner.as_ref().map(|s| s.progress()).unwrap_or_default();
-            parts.push((textutil::count((p.entries as f64 / el.as_secs_f64().max(0.001)) as i64) + "/s", t.status_fg));
+            let p = self
+                .scanner
+                .as_ref()
+                .map(|s| s.progress())
+                .unwrap_or_default();
+            parts.push((
+                textutil::count((p.entries as f64 / el.as_secs_f64().max(0.001)) as i64) + "/s",
+                t.status_fg,
+            ));
             if class != SizeClass::Small {
                 parts.push((format!("{} workers", p.workers), t.muted));
                 parts.push((format!("queue {}", textutil::count(p.pending)), t.muted));

src/tui/run.rs

@@ -11,7 +11,9 @@ use crate::brand;
 use crate::cancel::Cancel;
 use crate::textutil;
 use crossbeam_channel::{after, select, Receiver, Sender};
-use crossterm::event::{self, Event, KeyCode, KeyEvent, KeyEventKind, KeyModifiers, MouseButton, MouseEventKind};
+use crossterm::event::{
+    self, Event, KeyCode, KeyEvent, KeyEventKind, KeyModifiers, MouseButton, MouseEventKind,
+};
 use crossterm::{cursor, execute, terminal};
 use std::fmt::Write as _;
 use std::io::{self, Write};
@@ -26,7 +28,8 @@ static TERMINATED: AtomicBool = AtomicBool::new(false);
 
 /// Mouse off (1000/1002/1003/1015/1006), bracketed paste off, cursor on,
 /// main screen.
-const RESTORE: &str = "\x1b[?1006l\x1b[?1015l\x1b[?1003l\x1b[?1002l\x1b[?1000l\x1b[?2004l\x1b[?25h\x1b[?1049l";
+const RESTORE: &str =
+    "\x1b[?1006l\x1b[?1015l\x1b[?1003l\x1b[?1002l\x1b[?1000l\x1b[?2004l\x1b[?25h\x1b[?1049l";
 
 fn write_raw(s: &str) {
     let mut b = s.as_bytes();
@@ -84,7 +87,18 @@ fn detect_profile() -> Profile {
     if ct == "truecolor" || ct == "24bit" || term.ends_with("-direct") {
         return Profile::TrueColor;
     }
-    if ["kitty", "alacritty", "wezterm", "ghostty", "foot", "contour", "rio"].iter().any(|t| term.contains(t)) {
+    if [
+        "kitty",
+        "alacritty",
+        "wezterm",
+        "ghostty",
+        "foot",
+        "contour",
+        "rio",
+    ]
+    .iter()
+    .any(|t| term.contains(t))
+    {
         return Profile::TrueColor;
     }
     if term.contains("256color") || !ct.is_empty() {
@@ -100,7 +114,11 @@ pub fn run(opts: Options) -> Result<(), crate::Error> {
     let forced = forced_profile(&opts.color);
     if forced.is_none() && !opts.color.is_empty() && opts.color != "auto" {
         cancel.cancel();
-        return Err(format!("invalid --color {:?} (auto, truecolor, 256, 16, none)", opts.color).into());
+        return Err(format!(
+            "invalid --color {:?} (auto, truecolor, 256, 16, none)",
+            opts.color
+        )
+        .into());
     }
     let mouse = opts.mouse;
     let mut m = Model::new(opts, s, t, cancel.clone());
@@ -111,7 +129,11 @@ pub fn run(opts: Options) -> Result<(), crate::Error> {
         std::thread::spawn(|| {
             std::thread::sleep(Duration::from_millis(500));
             // Mirrors the scanner's guard: a worker panic aborts after the hook.
-            if std::panic::catch_unwind(|| panic!("MAPSIZE_DEBUG_PANIC=scanner: deliberate panic to test terminal restoration")).is_err() {
+            if std::panic::catch_unwind(|| {
+                panic!("MAPSIZE_DEBUG_PANIC=scanner: deliberate panic to test terminal restoration")
+            })
+            .is_err()
+            {
                 std::process::abort();
             }
         });
@@ -127,7 +149,13 @@ fn enter_terminal(mouse: bool) -> io::Result<()> {
     terminal::enable_raw_mode()?;
     ACTIVE.store(true, Ordering::SeqCst);
     let mut out = io::stdout();
-    execute!(out, terminal::EnterAlternateScreen, cursor::Hide, event::EnableBracketedPaste, terminal::SetTitle(brand::NAME))?;
+    execute!(
+        out,
+        terminal::EnterAlternateScreen,
+        cursor::Hide,
+        event::EnableBracketedPaste,
+        terminal::SetTitle(brand::NAME)
+    )?;
     if mouse {
         execute!(out, event::EnableMouseCapture)?;
     }
@@ -140,7 +168,11 @@ fn convert_key(ev: KeyEvent) -> Option<Key> {
         return None;
     }
     let m = ev.modifiers;
-    let (ctrl, alt, shift) = (m.contains(KeyModifiers::CONTROL), m.contains(KeyModifiers::ALT), m.contains(KeyModifiers::SHIFT));
+    let (ctrl, alt, shift) = (
+        m.contains(KeyModifiers::CONTROL),
+        m.contains(KeyModifiers::ALT),
+        m.contains(KeyModifiers::SHIFT),
+    );
     let mut prefix = String::new();
     if ctrl {
         prefix += "ctrl+";
@@ -148,14 +180,37 @@ fn convert_key(ev: KeyEvent) -> Option<Key> {
     if alt {
         prefix += "alt+";
     }
-    let named = |n: &str| Some(Key { name: format!("{prefix}{}{n}", if shift { "shift+" } else { "" }), text: String::new(), ctrl_alt: ctrl || alt });
+    let named = |n: &str| {
+        Some(Key {
+            name: format!("{prefix}{}{n}", if shift { "shift+" } else { "" }),
+            text: String::new(),
+            ctrl_alt: ctrl || alt,
+        })
+    };
     match ev.code {
         KeyCode::Char(c) => {
-            let base = if c == ' ' { "space".to_string() } else if ctrl || alt { c.to_lowercase().collect() } else { c.to_string() };
-            let text = if ctrl || alt { String::new() } else { c.to_string() };
-            Some(Key { name: prefix + &base, text, ctrl_alt: ctrl || alt })
+            let base = if c == ' ' {
+                "space".to_string()
+            } else if ctrl || alt {
+                c.to_lowercase().collect()
+            } else {
+                c.to_string()
+            };
+            let text = if ctrl || alt {
+                String::new()
+            } else {
+                c.to_string()
+            };
+            Some(Key {
+                name: prefix + &base,
+                text,
+                ctrl_alt: ctrl || alt,
+            })
         }
-        KeyCode::BackTab => Some(Key { name: format!("{prefix}shift+tab"), ..Default::default() }),
+        KeyCode::BackTab => Some(Key {
+            name: format!("{prefix}shift+tab"),
+            ..Default::default()
+        }),
         KeyCode::Enter => named("enter"),
         KeyCode::Esc => named("esc"),
         KeyCode::Tab => named("tab"),
@@ -256,7 +311,9 @@ fn base64(b: &[u8]) -> String {
     const A: &[u8; 64] = b"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
     let mut s = String::with_capacity(b.len().div_ceil(3) * 4);
     for c in b.chunks(3) {
-        let n = (c[0] as u32) << 16 | (*c.get(1).unwrap_or(&0) as u32) << 8 | *c.get(2).unwrap_or(&0) as u32;
+        let n = (c[0] as u32) << 16
+            | (*c.get(1).unwrap_or(&0) as u32) << 8
+            | *c.get(2).unwrap_or(&0) as u32;
         for i in 0..4 {
             if i <= c.len() {
                 s.push(A[(n >> (18 - 6 * i) & 63) as usize] as char);
@@ -332,7 +389,14 @@ fn line_diff(old: &str, new: &str) -> Vec<(usize, std::ops::Range<usize>)> {
 }
 
 impl Screen {
-    fn draw(&mut self, out: &mut impl Write, frame: &str, w: i32, h: i32, extra: &str) -> io::Result<()> {
+    fn draw(
+        &mut self,
+        out: &mut impl Write,
+        frame: &str,
+        w: i32,
+        h: i32,
+        extra: &str,
+    ) -> io::Result<()> {
         self.buf.clear();
         self.buf.push_str("\x1b[?2026h"); // synchronized output, where supported
         if (w, h) != self.size {
@@ -386,7 +450,11 @@ fn event_loop(m: &mut Model) -> io::Result<()> {
         std::thread::spawn(move || input_thread(tx, stop));
     }
     let (w, h) = terminal::size()?;
-    let mut rt = Runtime { tx, timers: Vec::new(), out: String::new() };
+    let mut rt = Runtime {
+        tx,
+        timers: Vec::new(),
+        out: String::new(),
+    };
     rt.exec(m.update(Msg::Size(w as i32, h as i32)));
     let init = m.init();
     rt.exec(init);
@@ -414,7 +482,9 @@ fn event_loop(m: &mut Model) -> io::Result<()> {
         // Fire due timers, then drain whatever else is queued before the next
         // frame, so bursts (resize storms) cost one render.
         let now = Instant::now();
-        let (due, later): (Vec<_>, Vec<_>) = std::mem::take(&mut rt.timers).into_iter().partition(|t| t.0 <= now);
+        let (due, later): (Vec<_>, Vec<_>) = std::mem::take(&mut rt.timers)
+            .into_iter()
+            .partition(|t| t.0 <= now);
         rt.timers = later;
         for (_, msg) in due {
             let c = m.update(msg);
@@ -438,7 +508,14 @@ mod tests {
 
     #[test]
     fn base64_matches_rfc4648() {
-        for (i, o) in [("", ""), ("f", "Zg=="), ("fo", "Zm8="), ("foo", "Zm9v"), ("foob", "Zm9vYg=="), ("foobar", "Zm9vYmFy")] {
+        for (i, o) in [
+            ("", ""),
+            ("f", "Zg=="),
+            ("fo", "Zm8="),
+            ("foo", "Zm9v"),
+            ("foob", "Zm9vYg=="),
+            ("foobar", "Zm9vYmFy"),
+        ] {
             assert_eq!(base64(i.as_bytes()), o);
         }
     }
@@ -450,7 +527,10 @@ mod tests {
         s.draw(&mut out, "a\nb\nc", 1, 3, "").unwrap();
         out.clear();
         s.draw(&mut out, "a\nX\nc", 1, 3, "").unwrap();
-        assert_eq!(String::from_utf8(out).unwrap(), "\x1b[?2026h\x1b[2;1HX\x1b[?2026l");
+        assert_eq!(
+            String::from_utf8(out).unwrap(),
+            "\x1b[?2026h\x1b[2;1HX\x1b[?2026l"
+        );
         // Within a line only the differing style runs are rewritten.
         let a = "\x1b[0;1mab\x1b[0;7m日x\x1b[0mcd\x1b[0m";
         let b = "\x1b[0;1mab\x1b[0;7m日y\x1b[0mcd\x1b[0m";

src/tui/search.rs

@@ -2,7 +2,7 @@
 
 use super::canvas::{Canvas, Style, BOLD};
 use super::model::{Cmd, Key, Model, Msg};
-use super::{tw, trunc};
+use super::{trunc, tw};
 use crate::cancel::Cancel;
 use crate::filter::{self, FilterResult, Query};
 use crate::inventory::Tree;
@@ -74,7 +74,11 @@ impl LineEditor {
                 if k.text.is_empty() || k.ctrl_alt {
                     return (false, false);
                 }
-                let rs: Vec<char> = k.text.chars().filter(|&r| r >= ' ' && r != '\x7f').collect();
+                let rs: Vec<char> = k
+                    .text
+                    .chars()
+                    .filter(|&r| r >= ' ' && r != '\x7f')
+                    .collect();
                 if rs.is_empty() || self.buf.len() + rs.len() > 1024 {
                     return (false, true);
                 }
@@ -174,7 +178,9 @@ impl Model {
     /// Evaluates the current query in the background. The tree is
     /// read-locked by the worker; stale results are discarded by generation.
     pub fn apply_filter(&mut self) -> Cmd {
-        let Some(q) = self.search.query.clone() else { return Cmd::None };
+        let Some(q) = self.search.query.clone() else {
+            return Cmd::None;
+        };
         if let Some(c) = self.search.cancel.take() {
             c.cancel();
         }
@@ -235,7 +241,11 @@ impl Model {
         } else if s.busy {
             "filtering…".into()
         } else if let Some(res) = &s.result {
-            format!("{} matches · {}", textutil::count(res.count), textutil::size(res.total))
+            format!(
+                "{} matches · {}",
+                textutil::count(res.count),
+                textutil::size(res.total)
+            )
         } else if s.ed.buf.is_empty() {
             "name, *.iso, size > 1GB, ext IN (iso,vmdk), age > 365d … Enter keep · Esc clear".into()
         } else {
@@ -245,14 +255,28 @@ impl Model {
         let avail = r.w - (x - r.x) - sw - 3;
         // Scroll the text so the cursor stays visible.
         let text = &s.ed.buf;
-        let start = if s.ed.cur as i32 > avail - 1 { (s.ed.cur as i32 - avail + 1) as usize } else { 0 };
+        let start = if s.ed.cur as i32 > avail - 1 {
+            (s.ed.cur as i32 - avail + 1) as usize
+        } else {
+            0
+        };
         let end = text.len().min(start + avail.max(0) as usize).max(start);
         let vis: String = text[start..end].iter().collect();
         cv.text(x, r.y, &textutil::sanitize(&vis), avail, st);
         let before: String = text[start..s.ed.cur].iter().collect();
         let cx = x + tw(&textutil::sanitize(&before));
-        let under = if s.ed.cur < text.len() { textutil::sanitize(&text[s.ed.cur].to_string()) } else { " ".into() };
-        cv.text(cx, r.y, &under, 2, Style::new(t.panel_bg, t.fg).with(self.mono_rev()));
+        let under = if s.ed.cur < text.len() {
+            textutil::sanitize(&text[s.ed.cur].to_string())
+        } else {
+            " ".into()
+        };
+        cv.text(
+            cx,
+            r.y,
+            &under,
+            2,
+            Style::new(t.panel_bg, t.fg).with(self.mono_rev()),
+        );
         cv.text_right(r.x, r.y, r.w - 1, &trunc(&status, sw), status_st);
     }
 
@@ -260,9 +284,21 @@ impl Model {
         let t = &self.theme;
         let s = &self.search;
         let mut x = r.x + 1;
-        x += cv.text(x, r.y, " FILTER ", 8, Style::new(t.text_on(t.warn), t.warn).with(BOLD | self.mono_rev()));
+        x += cv.text(
+            x,
+            r.y,
+            " FILTER ",
+            8,
+            Style::new(t.text_on(t.warn), t.warn).with(BOLD | self.mono_rev()),
+        );
         let q = s.query.as_ref().map(|q| q.to_string()).unwrap_or_default();
-        x += cv.text(x + 1, r.y, &textutil::sanitize(&q), r.w / 2, Style::new(t.fg, t.panel_bg).with(BOLD)) + 1;
+        x += cv.text(
+            x + 1,
+            r.y,
+            &textutil::sanitize(&q),
+            r.w / 2,
+            Style::new(t.fg, t.panel_bg).with(BOLD),
+        ) + 1;
         let mut info = "filtering…".to_string();
         if let (Some(res), false) = (&s.result, s.busy) {
             info = format!(
@@ -272,6 +308,12 @@ impl Model {
                 textutil::size(tr.node(0).total(self.size_mode))
             );
         }
-        cv.text(x + 2, r.y, &info, r.x + r.w - x - 3, Style::new(t.muted, t.panel_bg));
+        cv.text(
+            x + 2,
+            r.y,
+            &info,
+            r.x + r.w - x - 3,
+            Style::new(t.muted, t.panel_bg),
+        );
     }
 }

src/tui/side.rs

@@ -15,7 +15,16 @@ impl Model {
         let t = self.theme.clone();
         let ps = t.panel();
         cv.fill(r, " ", ps);
-        cv.fill(Rect { x: r.x + r.w - 1, y: r.y, w: 1, h: r.h }, "│", Style::new(t.faint, t.panel_bg));
+        cv.fill(
+            Rect {
+                x: r.x + r.w - 1,
+                y: r.y,
+                w: 1,
+                h: r.h,
+            },
+            "│",
+            Style::new(t.faint, t.panel_bg),
+        );
         let w = r.w - 3;
         let x = r.x + 1;
         let mut y = r.y + 1;
@@ -45,21 +54,43 @@ impl Model {
             }
         }
         y += 1;
-        kvl(cv, &mut y, "Size", &textutil::size(self.size_of(tr, self.zoom)), val);
+        kvl(
+            cv,
+            &mut y,
+            "Size",
+            &textutil::size(self.size_of(tr, self.zoom)),
+            val,
+        );
         kvl(cv, &mut y, "Logical", &textutil::size(z.tot_size), plain);
         kvl(cv, &mut y, "Allocated", &textutil::size(z.tot_alloc), plain);
         kvl(cv, &mut y, "Files", &textutil::count(z.files as i64), plain);
-        kvl(cv, &mut y, "Directories", &textutil::count(z.dirs as i64), plain);
+        kvl(
+            cv,
+            &mut y,
+            "Directories",
+            &textutil::count(z.dirs as i64),
+            plain,
+        );
         if z.errors > 0 {
-            kvl(cv, &mut y, "Errors", &textutil::count(z.errors as i64), Style::new(t.err, t.panel_bg).with(BOLD));
+            kvl(
+                cv,
+                &mut y,
+                "Errors",
+                &textutil::count(z.errors as i64),
+                Style::new(t.err, t.panel_bg).with(BOLD),
+            );
         }
         y += 1;
 
         // Category breakdown with proportional bars.
         if let Some(cs) = tr.cat_sizes(self.zoom) {
             head(cv, &mut y, "CATEGORIES");
-            let mut cats: Vec<(Category, i64)> =
-                cs.iter().enumerate().filter(|(_, &v)| v > 0).map(|(i, &v)| (Category::from_u8(i as u8), v)).collect();
+            let mut cats: Vec<(Category, i64)> = cs
+                .iter()
+                .enumerate()
+                .filter(|(_, &v)| v > 0)
+                .map(|(i, &v)| (Category::from_u8(i as u8), v))
+                .collect();
             let total: i64 = cats.iter().map(|c| c.1).sum();
             cats.sort_by(|a, b| b.1.cmp(&a.1));
             for &(c, v) in &cats {
@@ -70,7 +101,13 @@ impl Model {
                 let sw = if t.mono || t.ascii { "   " } else { "██ " };
                 cv.text(x, y, sw, 3, Style::new(col, t.panel_bg));
                 cv.text(x + 3, y, c.name(), w - 3, plain);
-                cv.text_right(x, y, w, &textutil::percent(v, total), Style::new(t.muted, t.panel_bg));
+                cv.text_right(
+                    x,
+                    y,
+                    w,
+                    &textutil::percent(v, total),
+                    Style::new(t.muted, t.panel_bg),
+                );
                 y += 1;
                 self.paint_bar(cv, x + 3, y, w - 3, v as f64 / cats[0].1 as f64, col, false);
                 y += 1;
@@ -84,7 +121,10 @@ impl Model {
             let mut desc = Vec::new();
             if is_group(self.sel) {
                 if let Some(g) = self.group_info(self.sel) {
-                    desc.push(format!("{} smaller items", textutil::count(g.ids().len() as i64)));
+                    desc.push(format!(
+                        "{} smaller items",
+                        textutil::count(g.ids().len() as i64)
+                    ));
                     desc.push(textutil::size(g.size));
                 }
             } else {
@@ -92,7 +132,11 @@ impl Model {
                 if id != NO_NODE {
                     let n = tr.node(id);
                     desc.extend(wrap(&san(&n.name), w));
-                    desc.push(textutil::size(self.size_of(tr, id)) + "  ·  " + &textutil::percent(self.size_of(tr, id), self.size_of(tr, self.zoom)));
+                    desc.push(
+                        textutil::size(self.size_of(tr, id))
+                            + "  ·  "
+                            + &textutil::percent(self.size_of(tr, id), self.size_of(tr, self.zoom)),
+                    );
                     if n.is_dir() {
                         desc.push(textutil::count(n.files as i64) + " files");
                     } else {

src/tui/table.rs

@@ -16,7 +16,12 @@ pub(crate) struct Column {
 }
 
 pub(crate) const fn col(title: &'static str, width: i32, right: bool, clip_left: bool) -> Column {
-    Column { title, width, right, clip_left }
+    Column {
+        title,
+        width,
+        right,
+        clip_left,
+    }
 }
 
 /// One rendered row: cell strings plus optional per-cell styles.
@@ -69,7 +74,15 @@ impl Table {
         self.cursor.max(0) as usize
     }
 
-    pub fn paint(&mut self, m: &mut Model, cv: &mut Canvas, r: Rect, cols: &[Column], rows: &[TableRow], title: &str) {
+    pub fn paint(
+        &mut self,
+        m: &mut Model,
+        cv: &mut Canvas,
+        r: Rect,
+        cols: &[Column],
+        rows: &[TableRow],
+        title: &str,
+    ) {
         let t = m.theme.clone();
         cv.fill(r, " ", t.base());
         if r.h < 3 {
@@ -77,7 +90,13 @@ impl Table {
         }
         let mut y = r.y;
         if !title.is_empty() {
-            cv.text(r.x + 1, y, title, r.w - 2, Style::new(t.accent, t.bg).with(BOLD));
+            cv.text(
+                r.x + 1,
+                y,
+                title,
+                r.w - 2,
+                Style::new(t.accent, t.bg).with(BOLD),
+            );
             y += 1;
         }
         // Resolve flexible width.
@@ -88,7 +107,11 @@ impl Table {
         let hdr = Style::new(t.muted, t.bg).with(BOLD);
         for c in cols {
             let w = width(c);
-            let s = if c.right { pad_left(c.title, w) } else { c.title.to_string() };
+            let s = if c.right {
+                pad_left(c.title, w)
+            } else {
+                c.title.to_string()
+            };
             cv.text(x, y, &s, w, hdr);
             x += w + 1;
         }
@@ -114,7 +137,16 @@ impl Table {
             let mut base = t.base();
             if sel {
                 base = Style::new(t.text_on(t.sel), t.sel).with(BOLD | m.mono_rev());
-                cv.fill(Rect { x: r.x, y, w: r.w, h: 1 }, " ", base);
+                cv.fill(
+                    Rect {
+                        x: r.x,
+                        y,
+                        w: r.w,
+                        h: 1,
+                    },
+                    " ",
+                    base,
+                );
             }
             let mut x = r.x + 1;
             for (ci, c) in cols.iter().enumerate() {
@@ -135,7 +167,15 @@ impl Table {
                 }
                 x += w + 1;
             }
-            m.hits.push(Hit { r: Rect { x: r.x, y, w: r.w, h: 1 }, act: HitAct::Row(i as usize) });
+            m.hits.push(Hit {
+                r: Rect {
+                    x: r.x,
+                    y,
+                    w: r.w,
+                    h: 1,
+                },
+                act: HitAct::Row(i as usize),
+            });
             y += 1;
             i += 1;
         }
@@ -143,7 +183,11 @@ impl Table {
             cv.text_centered(r.x, r.y + r.h / 2, r.w, "Nothing to show", t.muted());
         }
         if n > self.height && self.height > 0 {
-            let pos = format!("{}/{}", textutil::count(self.cursor as i64 + 1), textutil::count(n as i64));
+            let pos = format!(
+                "{}/{}",
+                textutil::count(self.cursor as i64 + 1),
+                textutil::count(n as i64)
+            );
             cv.text_right(r.x, r.y, r.w - 1, &pos, t.muted());
         }
     }
@@ -152,10 +196,23 @@ impl Table {
 impl Model {
     /// Draws a proportional bar with eighth-block precision.
     #[allow(clippy::too_many_arguments)]
-    pub fn paint_bar(&self, cv: &mut Canvas, x: i32, y: i32, w: i32, frac: f64, col: Color, sel: bool) {
+    pub fn paint_bar(
+        &self,
+        cv: &mut Canvas,
+        x: i32,
+        y: i32,
+        w: i32,
+        frac: f64,
+        col: Color,
+        sel: bool,
+    ) {
         let t = &self.theme;
         let col = if col.is_default() { t.accent } else { col };
-        let bg = if sel { t.sel.mix(rgb(0, 0, 0), 0.25) } else { t.bg.mix(t.fg, 0.08) };
+        let bg = if sel {
+            t.sel.mix(rgb(0, 0, 0), 0.25)
+        } else {
+            t.bg.mix(t.fg, 0.08)
+        };
         let mut eighths = (frac * (w * 8) as f64 + 0.5) as i64;
         const PARTS: [&str; 8] = ["", "▏", "▎", "▍", "▌", "▋", "▊", "▉"];
         for i in 0..w {
@@ -170,7 +227,11 @@ impl Model {
                 ch = if eighths >= 4 { "#" } else { " " };
             }
             eighths -= 8;
-            let st = if t.mono { Style::default() } else { Style::new(col, bg) };
+            let st = if t.mono {
+                Style::default()
+            } else {
+                Style::new(col, bg)
+            };
             cv.text(x + i, y, ch, 1, st);
         }
     }

src/tui/tests.rs

@@ -1,11 +1,11 @@
 //! Headless model tests (ports of tui_test.go, nest_test.go, live_test.go).
 
 use super::bench::opts_for;
-use super::color256::{quant16, quant256};
 use super::canvas::rgb;
+use super::color256::{quant16, quant256};
 use super::mapview::TOP_MIN_AREA;
-use super::model::*;
 use super::modals::new_info_modal;
+use super::model::*;
 use crate::cancel::Cancel;
 use crate::inventory::{category_for, ext, Kind, NodeId, Tree, FLAG_SCANNED};
 use crate::scan;
@@ -39,7 +39,12 @@ fn test_tree() -> Tree {
     };
     let backups = add_dir(&mut t, 0, b"backups");
     for i in 0..40i64 {
-        file(&mut t, backups, format!("dump-{i:02}.tar.gz").as_bytes(), (1 + i) << 30);
+        file(
+            &mut t,
+            backups,
+            format!("dump-{i:02}.tar.gz").as_bytes(),
+            (1 + i) << 30,
+        );
     }
     let vms = add_dir(&mut t, 0, b"vms");
     file(&mut t, vms, b"ubuntu.qcow2", 86 << 30);
@@ -47,7 +52,12 @@ fn test_tree() -> Tree {
     let media = add_dir(&mut t, 0, b"media");
     let photos = add_dir(&mut t, media, "photos 日本語".as_bytes());
     for i in 0..300i64 {
-        file(&mut t, photos, format!("img{i:03}.jpg").as_bytes(), (i + 1) << 20);
+        file(
+            &mut t,
+            photos,
+            format!("img{i:03}.jpg").as_bytes(),
+            (i + 1) << 20,
+        );
     }
     file(&mut t, media, HOSTILE, 9 << 30);
     file(&mut t, media, "👨‍👩‍👧 family.mp4".as_bytes(), 12 << 30);
@@ -114,7 +124,12 @@ fn check_frame(m: &mut Model, w: i32, h: i32) -> String {
         "terminal control sequence from a filename leaked into the frame"
     );
     let lines: Vec<&str> = content.split('\n').collect();
-    assert_eq!(lines.len() as i32, h, "{w}x{h}: frame has {} lines", lines.len());
+    assert_eq!(
+        lines.len() as i32,
+        h,
+        "{w}x{h}: frame has {} lines",
+        lines.len()
+    );
     for (i, l) in lines.iter().enumerate() {
         let got = textutil::width(&strip(l)) as i32;
         assert_eq!(got, w, "{w}x{h}: line {i} has width {got}: {:?}", strip(l));
@@ -135,7 +150,10 @@ fn find(m: &Model, name: &[u8]) -> NodeId {
 }
 
 fn find_block(bs: &[Block], id: i64) -> Block {
-    bs.iter().copied().find(|b| b.id == id).unwrap_or(Block { id: 0, rect: Default::default() })
+    bs.iter().copied().find(|b| b.id == id).unwrap_or(Block {
+        id: 0,
+        rect: Default::default(),
+    })
 }
 
 #[test]
@@ -151,19 +169,39 @@ fn resize_transitions_preserve_state() {
     check_frame(&mut m, 120, 40);
     send(&mut m, vec![key("right")]);
     let sel = m.sel;
-    for (w, h) in [(80, 24), (120, 40), (300, 80), (70, 20), (180, 50), (40, 10), (39, 9), (200, 60)] {
+    for (w, h) in [
+        (80, 24),
+        (120, 40),
+        (300, 80),
+        (70, 20),
+        (180, 50),
+        (40, 10),
+        (39, 9),
+        (200, 60),
+    ] {
         send(&mut m, vec![size(w, h)]);
         check_frame(&mut m, w, h);
         assert_eq!(m.zoom, media, "{w}x{h}: zoom lost");
-        assert!(m.sel == sel || is_group(m.sel), "{w}x{h}: selection changed from {sel} to {}", m.sel);
+        assert!(
+            m.sel == sel || is_group(m.sel),
+            "{w}x{h}: selection changed from {sel} to {}",
+            m.sel
+        );
     }
     // The layout must be recomputed for the new geometry, not stretched.
     let l = m.tm.clone().unwrap();
-    assert!(l.rect.w <= 200 && l.rect.h <= 60, "layout not recomputed for final size: {:?}", l.rect);
+    assert!(
+        l.rect.w <= 200 && l.rect.h <= 60,
+        "layout not recomputed for final size: {:?}",
+        l.rect
+    );
     let r = l.rect;
     for b in &l.blocks {
         let br = b.rect;
-        assert!(br.x >= r.x && br.y >= r.y && br.x + br.w <= r.x + r.w && br.y + br.h <= r.y + r.h, "block {b:?} outside treemap {r:?}");
+        assert!(
+            br.x >= r.x && br.y >= r.y && br.x + br.w <= r.x + r.w && br.y + br.h <= r.y + r.h,
+            "block {b:?} outside treemap {r:?}"
+        );
     }
 }
 
@@ -172,7 +210,9 @@ fn resize_storm() {
     let mut m = new_test_model();
     let mut rnd = 1u64;
     let mut intn = |n: u64| {
-        rnd = rnd.wrapping_mul(6364136223846793005).wrapping_add(1442695040888963407);
+        rnd = rnd
+            .wrapping_mul(6364136223846793005)
+            .wrapping_add(1442695040888963407);
         (rnd >> 33) % n
     };
     send(&mut m, vec![size(120, 40)]);
@@ -199,9 +239,16 @@ fn modal_survives_resize() {
     for (w, h) in [(120, 40), (60, 14), (41, 10), (300, 80), (45, 12)] {
         send(&mut m, vec![size(w, h)]);
         let out = check_frame(&mut m, w, h);
-        assert!(out.contains("ITEM INFORMATION"), "{w}x{h}: modal title missing:\n{out}");
+        assert!(
+            out.contains("ITEM INFORMATION"),
+            "{w}x{h}: modal title missing:\n{out}"
+        );
         let f = &m.modals[0];
-        assert!(f.view_h >= 1 && f.view_h <= h, "{w}x{h}: modal viewport {}", f.view_h);
+        assert!(
+            f.view_h >= 1 && f.view_h <= h,
+            "{w}x{h}: modal viewport {}",
+            f.view_h
+        );
     }
     // Scrolling in a tiny terminal must stay in range.
     send(&mut m, vec![size(45, 12)]);
@@ -210,7 +257,12 @@ fn modal_survives_resize() {
     }
     check_frame(&mut m, 45, 12);
     let f = &m.modals[0];
-    assert!(f.scroll >= 0 && f.scroll <= f.content_n, "scroll out of range: {} of {}", f.scroll, f.content_n);
+    assert!(
+        f.scroll >= 0 && f.scroll <= f.content_n,
+        "scroll out of range: {} of {}",
+        f.scroll,
+        f.content_n
+    );
     send(&mut m, vec![key("esc")]);
     assert!(m.modals.is_empty(), "Esc should close the modal");
 }
@@ -228,14 +280,20 @@ fn spatial_navigation_uses_geometry() {
         if m.sel == before {
             continue; // edge of the map
         }
-        let (a, b) = (find_block(&blocks, before).rect, find_block(&blocks, m.sel).rect);
+        let (a, b) = (
+            find_block(&blocks, before).rect,
+            find_block(&blocks, m.sel).rect,
+        );
         let ok = match dir {
             "right" => b.x >= a.x + a.w,
             "left" => b.x + b.w <= a.x,
             "down" => b.y >= a.y + a.h,
             _ => b.y + b.h <= a.y,
         };
-        assert!(ok, "{dir} moved to a block that is not in that direction: {a:?} -> {b:?}");
+        assert!(
+            ok,
+            "{dir} moved to a block that is not in that direction: {a:?} -> {b:?}"
+        );
     }
 }
 
@@ -251,13 +309,21 @@ fn zoom_breadcrumbs_and_home() {
     send(&mut m, vec![key("space")]);
     assert_eq!(m.zoom, photos, "did not zoom into photos");
     let out = check_frame(&mut m, 100, 30);
-    assert!(out.contains("media › photos 日本語"), "breadcrumbs missing:\n{out}");
+    assert!(
+        out.contains("media › photos 日本語"),
+        "breadcrumbs missing:\n{out}"
+    );
     // Narrow terminal: breadcrumbs truncate from the left, keeping the tail.
     send(&mut m, vec![size(42, 12)]);
     let out = check_frame(&mut m, 42, 12);
     assert!(out.contains("photos"), "breadcrumb tail missing:\n{out}");
     send(&mut m, vec![key("backspace")]);
-    assert!(m.zoom == media && m.sel == photos as i64, "backspace: zoom {} sel {}", m.zoom, m.sel);
+    assert!(
+        m.zoom == media && m.sel == photos as i64,
+        "backspace: zoom {} sel {}",
+        m.zoom,
+        m.sel
+    );
     send(&mut m, vec![key("home")]);
     assert_eq!(m.zoom, 0, "home did not return to root");
 }
@@ -267,20 +333,40 @@ fn filter_transforms_map() {
     let mut m = new_test_model();
     send(&mut m, vec![size(120, 40), key("/")]);
     for c in "ext = gz".chars() {
-        send(&mut m, vec![Msg::Key(Key { name: c.to_string(), text: c.to_string(), ctrl_alt: false })]);
+        send(
+            &mut m,
+            vec![Msg::Key(Key {
+                name: c.to_string(),
+                text: c.to_string(),
+                ctrl_alt: false,
+            })],
+        );
     }
-    assert!(m.search.err.is_empty() && m.search.query.is_some(), "query not parsed: {:?}", m.search.err);
+    assert!(
+        m.search.err.is_empty() && m.search.query.is_some(),
+        "query not parsed: {:?}",
+        m.search.err
+    );
     let msgs = m.apply_filter().run_sync();
     send(&mut m, msgs);
     send(&mut m, vec![key("enter")]);
     assert!(m.search.result.is_some(), "no filter result");
     let out = check_frame(&mut m, 120, 40);
-    assert!(!out.contains("vms/") && out.contains("backups/"), "filter not applied to the map:\n{out}");
+    assert!(
+        !out.contains("vms/") && out.contains("backups/"),
+        "filter not applied to the map:\n{out}"
+    );
     assert!(out.contains("FILTER"), "filter indicator missing");
     send(&mut m, vec![key("esc")]);
-    assert!(m.search.query.is_none() && m.search.result.is_none(), "Esc should clear the filter");
+    assert!(
+        m.search.query.is_none() && m.search.result.is_none(),
+        "Esc should clear the filter"
+    );
     let out = check_frame(&mut m, 120, 40);
-    assert!(out.contains("vms/"), "map not restored after clearing filter:\n{out}");
+    assert!(
+        out.contains("vms/"),
+        "map not restored after clearing filter:\n{out}"
+    );
 }
 
 #[test]
@@ -292,7 +378,10 @@ fn hostile_name_sanitised_in_modal() {
     let md = new_info_modal(&m, &t.read().unwrap(), id);
     m.open_modal(md);
     let out = check_frame(&mut m, 120, 40);
-    assert!(out.contains(r"\x1b]0;pwned\x07"), "escaped name not shown:\n{out}");
+    assert!(
+        out.contains(r"\x1b]0;pwned\x07"),
+        "escaped name not shown:\n{out}"
+    );
 }
 
 #[test]
@@ -321,15 +410,26 @@ fn level_of_detail_groups_tiny_files() {
     m.zoom_to(&t.read().unwrap(), tiny);
     m.view();
     let l = m.tm.clone().unwrap();
-    assert!(l.blocks.len() as i32 <= 100 * 30 / TOP_MIN_AREA + 1, "{} blocks for 2000 equal files: LOD not applied", l.blocks.len());
-    assert!(l.groups.contains_key(&group_id(tiny)), "expected a group block for small items");
+    assert!(
+        l.blocks.len() as i32 <= 100 * 30 / TOP_MIN_AREA + 1,
+        "{} blocks for 2000 equal files: LOD not applied",
+        l.blocks.len()
+    );
+    assert!(
+        l.groups.contains_key(&group_id(tiny)),
+        "expected a group block for small items"
+    );
 }
 
 #[test]
 fn ctrl_c_quits_when_idle() {
     let mut m = new_test_model();
     send(&mut m, vec![size(80, 24)]);
-    m.update(Msg::Key(Key { name: "ctrl+c".into(), text: String::new(), ctrl_alt: true }));
+    m.update(Msg::Key(Key {
+        name: "ctrl+c".into(),
+        text: String::new(),
+        ctrl_alt: true,
+    }));
     assert!(m.quit, "Ctrl+C should quit when no scan runs");
 }
 
@@ -341,23 +441,45 @@ fn mouse() {
     // Click the centre of a block other than the selected one.
     let target = {
         let t = m.tree.read().unwrap();
-        m.tm.as_ref().unwrap().blocks.iter().copied()
+        m.tm.as_ref()
+            .unwrap()
+            .blocks
+            .iter()
+            .copied()
             .find(|b| b.id != m.sel && b.id >= 0 && t.node(b.id as NodeId).is_dir() && b.rect.w > 4)
             .unwrap()
     };
-    let click = || Msg::Click { x: target.rect.x + target.rect.w / 2, y: target.rect.y + target.rect.h / 2, button: Button::Left };
+    let click = || Msg::Click {
+        x: target.rect.x + target.rect.w / 2,
+        y: target.rect.y + target.rect.h / 2,
+        button: Button::Left,
+    };
     send(&mut m, vec![click()]);
     assert_eq!(m.sel, target.id, "click selected the wrong block");
     m.view();
     send(&mut m, vec![click()]); // second click within the double-click window
     assert_eq!(m.zoom as i64, target.id, "double click should zoom");
     m.view();
-    send(&mut m, vec![Msg::Wheel { x: 50, y: 20, up: false }]);
+    send(
+        &mut m,
+        vec![Msg::Wheel {
+            x: 50,
+            y: 20,
+            up: false,
+        }],
+    );
     assert_eq!(m.zoom, 0, "wheel down should zoom out");
     // A modal swallows clicks; clicking outside closes it.
     send(&mut m, vec![key("?")]);
     m.view();
-    send(&mut m, vec![Msg::Click { x: 0, y: 39, button: Button::Left }]);
+    send(
+        &mut m,
+        vec![Msg::Click {
+            x: 0,
+            y: 39,
+            button: Button::Left,
+        }],
+    );
     assert!(m.modals.is_empty(), "click outside modal should close it");
 }
 
@@ -370,12 +492,20 @@ fn quantizers() {
     assert!(n >= 16, "256 quantizer used palette-dependent index {n}");
     // A dark, slightly tinted shade must land on the grey ramp or a dark
     // cube entry, not a saturated one like olive (58) or navy (17).
-    assert!(![58, 17, 22].contains(&n), "dark tint mapped to saturated {n}");
+    assert!(
+        ![58, 17, 22].contains(&n),
+        "dark tint mapped to saturated {n}"
+    );
 }
 
 #[test]
 fn colour_depths_render_same_geometry() {
-    for p in [Profile::TrueColor, Profile::Ansi256, Profile::Ansi, Profile::Ascii] {
+    for p in [
+        Profile::TrueColor,
+        Profile::Ansi256,
+        Profile::Ansi,
+        Profile::Ascii,
+    ] {
         let mut m = new_test_model();
         m.profile = p;
         send(&mut m, vec![size(100, 30)]);
@@ -388,11 +518,23 @@ fn colour_depths_render_same_geometry() {
 fn copy_refuses_control_characters() {
     let mut m = new_test_model();
     m.copy_path(b"/srv/x\ncurl evil | sh\n");
-    assert!(m.toast.starts_with("Not copied"), "hostile path copied: {:?}", m.toast);
+    assert!(
+        m.toast.starts_with("Not copied"),
+        "hostile path copied: {:?}",
+        m.toast
+    );
     m.copy_path(&[b"/srv/media/".as_slice(), HOSTILE].concat());
-    assert!(m.toast.starts_with("Not copied"), "escape sequence copied: {:?}", m.toast);
+    assert!(
+        m.toast.starts_with("Not copied"),
+        "escape sequence copied: {:?}",
+        m.toast
+    );
     m.copy_path("/srv/photos 日本語/img001.jpg".as_bytes());
-    assert!(m.toast.starts_with("Copied"), "plain path refused: {:?}", m.toast);
+    assert!(
+        m.toast.starts_with("Copied"),
+        "plain path refused: {:?}",
+        m.toast
+    );
 }
 
 // ---- nest_test.go -----------------------------------------------------------
@@ -431,9 +573,18 @@ fn nesting_reaches_deep_media() {
     let mut m = model_for(root_tree());
     send(&mut m, vec![size(160, 45)]);
     let out = strip(m.view());
-    assert!(out.contains("mnt/raid/media/") && out.contains("S01/"), "chain or seasons missing:\n{out}");
+    assert!(
+        out.contains("mnt/raid/media/") && out.contains("S01/"),
+        "chain or seasons missing:\n{out}"
+    );
     let t = m.tree.read().unwrap();
-    let files = m.tm.as_ref().unwrap().nested.iter().filter(|nb| nb.id >= 0 && !t.node(nb.id as NodeId).is_dir()).count();
+    let files =
+        m.tm.as_ref()
+            .unwrap()
+            .nested
+            .iter()
+            .filter(|nb| nb.id >= 0 && !t.node(nb.id as NodeId).is_dir())
+            .count();
     assert!(files >= 50, "only {files} episode blocks drawn");
 }
 
@@ -453,7 +604,12 @@ fn reveal_headless_zooms_map() {
     m.snapshot = false; // reveal is refused for snapshots
     (m.sel, m.user_sel) = (mnt as i64, true);
     send(&mut m, vec![key("o")]);
-    assert_eq!(m.zoom, mnt, "zoom = {}, want mnt", m.tree.read().unwrap().path_string(m.zoom));
+    assert_eq!(
+        m.zoom,
+        mnt,
+        "zoom = {}, want mnt",
+        m.tree.read().unwrap().path_string(m.zoom)
+    );
 }
 
 // ---- live_test.go -----------------------------------------------------------
@@ -467,12 +623,24 @@ fn live_scan_rendering() {
         let d = root.0.join(format!("d{i:02}")).join("sub");
         std::fs::create_dir_all(&d).unwrap();
         for j in 0..40 {
-            std::fs::write(d.join(format!("f{j}.log")), vec![0u8; (i + 1) * (j + 1) * 100]).unwrap();
+            std::fs::write(
+                d.join(format!("f{j}.log")),
+                vec![0u8; (i + 1) * (j + 1) * 100],
+            )
+            .unwrap();
         }
     }
     let path = root.0.as_os_str().as_bytes().to_vec();
     let start: StartFn = Arc::new(move |c: Cancel| {
-        let s = scan::start(&path, scan::Options { workers: 4, chunk_size: 3, ..Default::default() }, c)?;
+        let s = scan::start(
+            &path,
+            scan::Options {
+                workers: 4,
+                chunk_size: 3,
+                ..Default::default()
+            },
+            c,
+        )?;
         let t = s.tree.clone();
         Ok((Some(s), t))
     });

src/tui/theme.rs

@@ -119,7 +119,11 @@ fn high_contrast_theme() -> Theme {
 }
 
 fn mono_theme() -> Theme {
-    Theme { name: "mono", mono: true, ..Theme::default() }
+    Theme {
+        name: "mono",
+        mono: true,
+        ..Theme::default()
+    }
 }
 
 /// Returns a built-in theme with user overrides applied.

src/tui/views.rs

@@ -4,11 +4,14 @@ use super::actions::DupView;
 use super::canvas::{Canvas, Color, Style, BOLD};
 use super::infoview::InfoView;
 use super::mapview::{map_key, map_paint, map_wheel};
-use super::model::{Cmd, Model};
 use super::modals::new_info_modal;
+use super::model::{Cmd, Model};
 use super::table::{col, Table, TableRow};
 use super::{fmt_date, san};
-use crate::inventory::{ExtStat, Kind, NodeId, SizeMode, TopK, Tree, FLAG_DELETED, FLAG_HARDLINKED, FLAG_HARDLINK_DUP, FLAG_SPARSE, NO_NODE};
+use crate::inventory::{
+    ExtStat, Kind, NodeId, SizeMode, TopK, Tree, FLAG_DELETED, FLAG_HARDLINKED, FLAG_HARDLINK_DUP,
+    FLAG_SPARSE, NO_NODE,
+};
 use crate::snapshot::{Change, Status};
 use crate::textutil;
 use crate::treemap::Rect;
@@ -159,16 +162,31 @@ impl ListView {
                 name.push('/');
                 files = textutil::count(n.files as i64);
             }
-            let modified = if n.mtime > 0 { fmt_date(n.mtime) } else { String::new() };
+            let modified = if n.mtime > 0 {
+                fmt_date(n.mtime)
+            } else {
+                String::new()
+            };
             let c = m.color_of(tr, id as i64);
             let mut name_st = Style::new(c.mix(t.fg, 0.45), t.bg);
             if n.is_dir() {
                 name_st.attr = BOLD;
             }
-            let frac = if k.sizes[0] > 0 { k.sizes[i] as f64 / k.sizes[0] as f64 } else { 0.0 };
+            let frac = if k.sizes[0] > 0 {
+                k.sizes[i] as f64 / k.sizes[0] as f64
+            } else {
+                0.0
+            };
             let muted = Some(Style::new(t.muted, t.bg));
             let mut row = TableRow {
-                cells: vec![textutil::size(k.sizes[i]), textutil::percent(k.sizes[i], total), String::new(), files, modified, name],
+                cells: vec![
+                    textutil::size(k.sizes[i]),
+                    textutil::percent(k.sizes[i], total),
+                    String::new(),
+                    files,
+                    modified,
+                    name,
+                ],
                 styles: vec![None, muted, None, muted, muted, Some(name_st)],
                 bar: frac,
                 bar_col: c,
@@ -178,15 +196,29 @@ impl ListView {
             }
             rows.push(row);
         }
-        let mut cols = vec![col("SIZE", 10, true, false), col("%", 5, true, false), col("", 12, false, false),
-            col("FILES", 10, true, false), col("MODIFIED", 10, false, false), col("NAME", 0, false, false)];
+        let mut cols = vec![
+            col("SIZE", 10, true, false),
+            col("%", 5, true, false),
+            col("", 12, false, false),
+            col("FILES", 10, true, false),
+            col("MODIFIED", 10, false, false),
+            col("NAME", 0, false, false),
+        ];
         if m.opts.diff.is_some() {
             cols[4] = col("CHANGE", 12, true, false);
         }
         if r.w < 70 {
-            cols = vec![col("SIZE", 10, true, false), col("%", 5, true, false), col("NAME", 0, false, false)];
+            cols = vec![
+                col("SIZE", 10, true, false),
+                col("%", 5, true, false),
+                col("NAME", 0, false, false),
+            ];
             for row in rows.iter_mut() {
-                row.cells = vec![std::mem::take(&mut row.cells[0]), std::mem::take(&mut row.cells[1]), std::mem::take(&mut row.cells[5])];
+                row.cells = vec![
+                    std::mem::take(&mut row.cells[0]),
+                    std::mem::take(&mut row.cells[1]),
+                    std::mem::take(&mut row.cells[5]),
+                ];
                 row.styles = vec![None, row.styles[1], row.styles[5]];
             }
         }
@@ -247,22 +279,56 @@ impl ExtView {
         let rows: Vec<TableRow> = st
             .iter()
             .map(|s| {
-                let ext = if s.ext.is_empty() { "(none)".to_string() } else { format!(".{}", s.ext) };
-                let c = t.ext.as_ref().and_then(|e| e.get(&s.ext)).copied().unwrap_or(t.cat[s.cat as usize]);
-                let frac = if v0 > 0 { pick(m, s) as f64 / v0 as f64 } else { 0.0 };
+                let ext = if s.ext.is_empty() {
+                    "(none)".to_string()
+                } else {
+                    format!(".{}", s.ext)
+                };
+                let c = t
+                    .ext
+                    .as_ref()
+                    .and_then(|e| e.get(&s.ext))
+                    .copied()
+                    .unwrap_or(t.cat[s.cat as usize]);
+                let frac = if v0 > 0 {
+                    pick(m, s) as f64 / v0 as f64
+                } else {
+                    0.0
+                };
                 TableRow {
-                    cells: vec![textutil::sanitize(&ext), s.cat.name().into(), textutil::count(s.count), textutil::size(pick(m, s)),
-                        textutil::percent(pick(m, s), total), String::new()],
-                    styles: vec![Some(Style::new(c, t.bg).with(BOLD)), Some(Style::new(t.muted, t.bg)), None, None,
-                        Some(Style::new(t.muted, t.bg)), None],
+                    cells: vec![
+                        textutil::sanitize(&ext),
+                        s.cat.name().into(),
+                        textutil::count(s.count),
+                        textutil::size(pick(m, s)),
+                        textutil::percent(pick(m, s), total),
+                        String::new(),
+                    ],
+                    styles: vec![
+                        Some(Style::new(c, t.bg).with(BOLD)),
+                        Some(Style::new(t.muted, t.bg)),
+                        None,
+                        None,
+                        Some(Style::new(t.muted, t.bg)),
+                        None,
+                    ],
                     bar: frac,
                     bar_col: c,
                 }
             })
             .collect();
-        let cols = [col("EXTENSION", 14, false, false), col("CATEGORY", 12, false, false), col("FILES", 11, true, false),
-            col("SIZE", 10, true, false), col("%", 5, true, false), col("", 0, false, false)];
-        let title = format!("File types under {} — Enter filters the map by extension", san(&tr.node(m.zoom).name));
+        let cols = [
+            col("EXTENSION", 14, false, false),
+            col("CATEGORY", 12, false, false),
+            col("FILES", 11, true, false),
+            col("SIZE", 10, true, false),
+            col("%", 5, true, false),
+            col("", 0, false, false),
+        ];
+        let title = format!(
+            "File types under {} — Enter filters the map by extension",
+            san(&tr.node(m.zoom).name)
+        );
         self.tb.paint(m, cv, r, &cols, &rows, &title);
     }
 
@@ -273,7 +339,11 @@ impl ExtView {
         }
         if (k == "enter" || k == "space") && self.tb.at() < st.len() {
             let e = &st[self.tb.at()].ext;
-            let q = if e.is_empty() { "type = file AND ext = \"\"".to_string() } else { format!("ext = \"{e}\"") };
+            let q = if e.is_empty() {
+                "type = file AND ext = \"\"".to_string()
+            } else {
+                format!("ext = \"{e}\"")
+            };
             m.set_view_by_name("Map");
             return (true, m.set_filter(&q));
         }
@@ -295,10 +365,25 @@ enum TopMode {
     Hardlinks,
 }
 
-const TOP_MODES: [TopMode; 7] = [TopMode::Files, TopMode::Dirs, TopMode::Old, TopMode::New, TopMode::Count, TopMode::Sparse, TopMode::Hardlinks];
+const TOP_MODES: [TopMode; 7] = [
+    TopMode::Files,
+    TopMode::Dirs,
+    TopMode::Old,
+    TopMode::New,
+    TopMode::Count,
+    TopMode::Sparse,
+    TopMode::Hardlinks,
+];
 
-const TOP_NAMES: [&str; 7] = ["Largest files", "Largest directories (own files)", "Oldest large files", "Newest large files",
-    "Most files", "Sparse files", "Hard-linked files"];
+const TOP_NAMES: [&str; 7] = [
+    "Largest files",
+    "Largest directories (own files)",
+    "Oldest large files",
+    "Newest large files",
+    "Most files",
+    "Sparse files",
+    "Hard-linked files",
+];
 
 const TOP_LIMIT: usize = 500;
 
@@ -319,7 +404,9 @@ impl TopView {
             return;
         }
         (self.cache_key, self.computed) = (k, true);
-        let is_file = |n: &crate::inventory::Node| n.kind == Kind::File && n.flags & (FLAG_HARDLINK_DUP | FLAG_DELETED) == 0;
+        let is_file = |n: &crate::inventory::Node| {
+            n.kind == Kind::File && n.flags & (FLAG_HARDLINK_DUP | FLAG_DELETED) == 0
+        };
         let matches = |id: NodeId| m.search.result.as_ref().is_none_or(|r| r.size(id) > 0);
         let mut tk = TopK::new(TOP_LIMIT);
         let mut val: HashMap<NodeId, i64> = HashMap::new();
@@ -358,7 +445,14 @@ impl TopView {
                     }
                     TopMode::Old | TopMode::New => {
                         if sz >= LARGE_FILE && n.mtime > 0 {
-                            tk.offer(id, if mode == TopMode::Old { -n.mtime } else { n.mtime });
+                            tk.offer(
+                                id,
+                                if mode == TopMode::Old {
+                                    -n.mtime
+                                } else {
+                                    n.mtime
+                                },
+                            );
                             val.insert(id, sz);
                         }
                     }
@@ -390,8 +484,16 @@ impl TopView {
         let mut rows = Vec::with_capacity(self.ids.len());
         for (i, &id) in self.ids.iter().enumerate() {
             let n = tr.node(id);
-            let val = if self.mode == TopMode::Count { textutil::count(self.vals[i]) } else { textutil::size(self.vals[i]) };
-            let modified = if n.mtime > 0 { fmt_date(n.mtime) } else { String::new() };
+            let val = if self.mode == TopMode::Count {
+                textutil::count(self.vals[i])
+            } else {
+                textutil::size(self.vals[i])
+            };
+            let modified = if n.mtime > 0 {
+                fmt_date(n.mtime)
+            } else {
+                String::new()
+            };
             let frac = if first > 0 && self.mode != TopMode::Old && self.mode != TopMode::New {
                 self.vals[i] as f64 / first as f64
             } else {
@@ -400,12 +502,20 @@ impl TopView {
             let c = m.color_of(tr, id as i64);
             rows.push(TableRow {
                 cells: vec![val, modified, String::new(), san(&tr.path_bytes(id))],
-                styles: vec![None, Some(Style::new(t.muted, t.bg)), None, Some(Style::new(c.mix(t.fg, 0.45), t.bg))],
+                styles: vec![
+                    None,
+                    Some(Style::new(t.muted, t.bg)),
+                    None,
+                    Some(Style::new(c.mix(t.fg, 0.45), t.bg)),
+                ],
                 bar: frac,
                 bar_col: c,
             });
         }
-        let mut title = format!("◂ {} ▸   (←/→ change list · Enter details · Space jump to it)", TOP_NAMES[self.mode as usize]);
+        let mut title = format!(
+            "◂ {} ▸   (←/→ change list · Enter details · Space jump to it)",
+            TOP_NAMES[self.mode as usize]
+        );
         if m.search.result.is_some() {
             title += "  · filtered";
         }
@@ -414,7 +524,12 @@ impl TopView {
             TopMode::Sparse => "SAVED",
             _ => "SIZE",
         };
-        let cols = [col(val_title, 10, true, false), col("MODIFIED", 10, false, false), col("", 10, false, false), col("PATH", 0, false, true)];
+        let cols = [
+            col(val_title, 10, true, false),
+            col("MODIFIED", 10, false, false),
+            col("", 10, false, false),
+            col("PATH", 0, false, true),
+        ];
         self.tb.paint(m, cv, r, &cols, &rows, &title);
     }
 
@@ -487,18 +602,45 @@ impl ChangesView {
                     Status::Unchanged => Color::default(),
                 };
                 TableRow {
-                    cells: vec![textutil::signed_size(c.delta), c.status.name().into(), textutil::size(c.old), textutil::size(c.new),
-                        String::new(), textutil::sanitize(&c.path)],
-                    styles: vec![Some(Style::new(col, t.bg).with(BOLD)), Some(Style::new(col, t.bg)), Some(Style::new(t.muted, t.bg)), None, None, None],
+                    cells: vec![
+                        textutil::signed_size(c.delta),
+                        c.status.name().into(),
+                        textutil::size(c.old),
+                        textutil::size(c.new),
+                        String::new(),
+                        textutil::sanitize(&c.path),
+                    ],
+                    styles: vec![
+                        Some(Style::new(col, t.bg).with(BOLD)),
+                        Some(Style::new(col, t.bg)),
+                        Some(Style::new(t.muted, t.bg)),
+                        None,
+                        None,
+                        None,
+                    ],
                     bar: c.delta.abs() as f64 / max_abs as f64,
                     bar_col: col,
                 }
             })
             .collect();
-        let cols = [col("CHANGE", 13, true, false), col("STATUS", 9, false, false), col("OLD", 10, true, false),
-            col("NEW", 10, true, false), col("", 10, false, false), col("PATH", 0, false, true)];
-        let (ro, rn) = (d.old.node(0).total(m.size_mode), tr.node(0).total(m.size_mode));
-        let title = format!("Changes  {} → {}  ({})", textutil::size(ro), textutil::size(rn), textutil::signed_size(rn - ro));
+        let cols = [
+            col("CHANGE", 13, true, false),
+            col("STATUS", 9, false, false),
+            col("OLD", 10, true, false),
+            col("NEW", 10, true, false),
+            col("", 10, false, false),
+            col("PATH", 0, false, true),
+        ];
+        let (ro, rn) = (
+            d.old.node(0).total(m.size_mode),
+            tr.node(0).total(m.size_mode),
+        );
+        let title = format!(
+            "Changes  {} → {}  ({})",
+            textutil::size(ro),
+            textutil::size(rn),
+            textutil::signed_size(rn - ro)
+        );
         self.tb.paint(m, cv, r, &cols, &rows, &title);
     }
 
@@ -511,7 +653,10 @@ impl ChangesView {
             let c = &self.rows.as_ref().unwrap()[self.tb.at()];
             if c.node == NO_NODE {
                 if k == "enter" || k == "space" {
-                    let msg = format!("Removed since the old snapshot: {}", textutil::sanitize(&c.path));
+                    let msg = format!(
+                        "Removed since the old snapshot: {}",
+                        textutil::sanitize(&c.path)
+                    );
                     return (true, m.info(msg));
                 }
                 return (false, Cmd::None);