A Save into a directory that is not there says no such directory, ENOENT

It failed EIO with `file not found`, which named no file that was
missing. It says `Save <path>: no such directory`, and a late failure
saying `no such` answers ENOENT, as a builtin's does.

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

1 files changed, 10 insertions, 2 deletions

diff --git a/src/pardes.zig b/src/pardes.zig
index 1afb1e24..27cbf383 100644
--- a/src/pardes.zig
+++ b/src/pardes.zig
@@ -5271,8 +5271,16 @@ pub const Pardes = struct {
             // The `-%` spelling fs.zig already uses for "make this dirty".
             f.saved_revision = f.revision -% 1;
         };
-        var what: [limits.host_path_cap + 8]u8 = undefined;
-        p.reportError(id, std.fmt.bufPrint(&what, "Save {s}", .{path}) catch "Save", err);
+        var what: [limits.host_path_cap + 32]u8 = undefined;
+        // A write into a directory that is not there: said so, in the words
+        // a mount reads as ENOENT.
+        const parent = std.fs.path.dirname(path) orelse "/";
+        const no_dir = err == error.FileNotFound or err == error.NotDir or
+            (if (comptime hosted) (if (filesystem.localPath(parent)) |local| !exec.isDirectory(local) else false) else false);
+        if (no_dir)
+            p.reportFailure(id, std.fmt.bufPrint(&what, "Save {s}: no such directory", .{path}) catch "Save: no such directory")
+        else
+            p.reportError(id, std.fmt.bufPrint(&what, "Save {s}", .{path}) catch "Save", err);
         const said = if (p.panes[id]) |pane| pane.msg[0..pane.msg_len] else "Save failed";
         const kept = @import("Messages.zig").clip(said, p.fs.late_failure.len);
         @memcpy(p.fs.late_failure[0..kept.len], kept);