A served-tree pane spoils no Grep, and `look .` from a gone directory is ENOENT

A pane named `/virtual` gave Grep the root `/`, which swallowed every
other pane's directory and ran out of walk before any file: every Grep
missed. Grep passes over panes of the served tree. And `.` from a pane
whose directory was gone resolved to the served tree's root (/virtual/),
or through the jump list to another pane's directory: a dot path is the
looking pane's own, and gone it fails, `look: <dir>: no such directory`.

Co-Authored-By: Claude Opus 5.5 <[email protected]>

1 files changed, 20 insertions, 2 deletions

diff --git a/src/look.zig b/src/look.zig
index fa86aee4..9a81a5c9 100644
--- a/src/look.zig
+++ b/src/look.zig
@@ -593,7 +593,11 @@ pub fn runSearch(p: *Pardes, id: usize, pat_raw: []const u8, kind: Search, start
         var nroots: usize = 0;
         for (p.panes) |slot| {
             const pp = slot orelse continue;
-            const d = Pardes.paneDir(pp);
+            // A pane of the served tree (/virtual/, /n/<peer>/) has no
+            // directory on this host to walk, and one that named `/` would
+            // swallow every other root: passed over.
+            const d = filesystem.localPath(Pardes.paneDir(pp)) orelse continue;
+            if (filesystem.isVirtual(if (pp.file) |f| f.path else d)) continue;
             var covered = false;
             var k: usize = 0;
             while (k < nroots) {
@@ -1107,7 +1111,8 @@ fn resolveLookTarget(p: *Pardes, id: usize, txt: []const u8, realbuf: *[4096]u8)
                 if (openPaneTarget(p, j, pl.at)) |target| return target;
         }
         found = resolve(p, txt, dir, realbuf);
-        if (found != .none or pl.path.len == 0 or pl.path[0] == '/') break;
+        // `.`, `..`, `./x` are this pane's directory's, not another's.
+        if (found != .none or pl.path.len == 0 or pl.path[0] == '/' or filesystem.dotRelative(pl.path)) break;
     }
     return found;
 }
@@ -1407,6 +1412,13 @@ pub fn lookAt(p: *Pardes, id: usize, operand: []const u8) void {
     }
     switch (found) {
         .none => {
+            // `.` or `..` from a pane whose directory is gone: said, ENOENT,
+            // not searched for as a word.
+            if (filesystem.dotRelative(trimmed)) {
+                const dir = Pardes.paneDir(pane);
+                var said: [4200]u8 = undefined;
+                return p.reportFailure(id, std.fmt.bufPrint(&said, "look: {s}: no such directory", .{dir[0..@min(dir.len, 4096)]}) catch "look: no such directory");
+            }
             // A raw terminal's clicks are its program's; a look written over
             // 9P is no keyboard input, and searches whatever the key mode.
             if (pane.image != null or (pane.body.mode == .tty and !p.fs.serving)) return;
@@ -1439,6 +1451,12 @@ pub fn lookAt(p: *Pardes, id: usize, operand: []const u8) void {
         },
         .url => |u| if (u.len <= 256) p.emit(.{ .open_link = .from(u) }),
         .dir => |dir| {
+            // A directory that is not there (the pane's own, gone): said,
+            // ENOENT, no terminal made in it.
+            if (comptime pardes.hosted) if (filesystem.localPath(dir)) |local| if (!exec.isDirectory(local)) {
+                var said: [4200]u8 = undefined;
+                return p.reportFailure(id, std.fmt.bufPrint(&said, "look: {s}: no such directory", .{dir[0..@min(dir.len, 4096)]}) catch "look: no such directory");
+            };
             for (p.panes, 0..) |slot, i| {
                 if (slot) |tt| if (std.mem.eql(u8, tt.cwdSlice(), dir) and exec.takesCommandLine(p, i)) {
                     clearNavigationSelection(p, tt);