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, 2 insertions, 1 deletions

diff --git a/src/exec.zig b/src/exec.zig
index 7d682d74..d114dbf8 100644
--- a/src/exec.zig
+++ b/src/exec.zig
@@ -295,9 +295,10 @@ pub fn saveTo(p: *Pardes, id: usize, path: []const u8) void {
     if (path.len == 0 or path[path.len - 1] == '/' or
         std.mem.indexOfScalar(u8, path, '\n') != null)
         return p.reportError(id, "save", error.NoFilename);
+    var home_buf: [4096]u8 = undefined;
     const full = std.fs.path.resolvePosix(
         p.scratch.allocator(),
-        &.{ Pardes.paneDir(pane), path },
+        &.{ Pardes.paneDir(pane), @import("fs.zig").expandHome(path, &home_buf) },
     ) catch return;
     if (!std.fs.path.isAbsolute(full)) return p.reportError(id, "save", error.NoDirectory);
     if (full.len > Pardes.SavePath.cap) return p.reportError(id, "save", error.PathTooLong);