A path typed with a leading ~ is the home directory, at every entry point that takes one, through one helper

Only DumpDir (dump.zig) and ShaderBuild expanded `~/`, each its own way.
So a look at `~/notes.txt`, `name ~/x`, `Save ~/x`, ThemeFile, Restore and
a quoted `pardes '~/x'` all took `~` as a directory of that name under the
pane's. There is now one rule, filesystem.expandHome. A leading `~`,
alone or before `/` or `:`, is $HOME, else the passwd entry's home;
`~user` is that user's (getpwnam). As in a shell, it applies even beside a
file named `~`, and `./~` names that file. Every entry point runs its
typed path through it:
- look, B3 and 9P, before any parsing, so `~/x:12`, `~/x:12:3` and
  `~/x:/re/` all work;
- name, and a tag's rename;
- Save <path>;
- ThemeFile, DumpDir, Restore and ShaderBuild's shader files;
- the forwarding launch.
Recent rows are not shown with `~` and need nothing. How names are shown
is unchanged.

Tests: expandHome's cases, and HOME unset (passwd), with HOME passed in
rather than set, since setenv moves the environ a spawned child reads.
fs.py covers Save into missing directories under `~`, `name ~/x`, a look
at `~/x:3`, and a forwarded `pardes '~/x'`.

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

1 files changed, 4 insertions, 1 deletions

diff --git a/src/look.zig b/src/look.zig
index de51804d..357a9c63 100644
--- a/src/look.zig
+++ b/src/look.zig
@@ -1499,8 +1499,11 @@ fn isRecentList(pane: *const Pane) bool {
     return std.meta.eql(o.from, panes.Output.Origin{ .cmd = .Recent }) or std.meta.eql(o.from, panes.Output.Origin{ .cmd = .Jumplist });
 }
 
-pub fn lookAt(p: *Pardes, id: usize, operand: []const u8) void {
+pub fn lookAt(p: *Pardes, id: usize, operand_raw: []const u8) void {
     const pane = p.panes[id] orelse return;
+    // `~/x`, `~/x:12`, `~/x:/re/`: home, before anything reads the text.
+    var home_buf: [4096]u8 = undefined;
+    const operand = filesystem.expandHome(std.mem.trim(u8, operand_raw, " \t\r\n"), &home_buf);
     // A +Recent row is a remembered place: reopened and clamped to the file
     // as it is now, never a miss for a line the file no longer has.
     if (isRecentList(pane)) {