A command run from a pane gets acme's $winid, the serial of the pane it was run from; one from a column's or the workspace's tag gets none

PARDES_PANE names the command pane itself, so a script a click ran had
no way to address the pane it was run in, as acme's win scripts do with
$winid. The command pane now remembers that pane and its child gets
winid set to it; a header tag's command, which no pane owns, gets winid
unset. PARDES_PANE is unchanged.

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

1 files changed, 9 insertions, 0 deletions

diff --git a/src/exec.zig b/src/exec.zig
index e15ad12c..47484105 100644
--- a/src/exec.zig
+++ b/src/exec.zig
@@ -792,6 +792,7 @@ fn runCommand(p: *Pardes, from: usize, line: []const u8) ?usize {
         if (panes.terminal.onAlternateScreen(pane)) panes.terminal.feedOutput(p, pane, "\x1b[?1049l");
         panes.terminal.feedOutput(p, pane, "\x1b[?1000l\x1b[?1002l\x1b[?1003l\x1b[?1006l\x1b[?2004l\x1b[?25h\x1b[0m");
         echoCommand(p, pane, line);
+        pane.command_from = winid(p, src);
         p.emitSpawn(id, pane.serial, pane.cwdSlice());
         noteRun(p, pane, "run", line);
         return id;
@@ -804,12 +805,20 @@ fn runCommand(p: *Pardes, from: usize, line: []const u8) ?usize {
         p.reportError(from, "exec", err);
         return null;
     };
+    pane.command_from = winid(p, src);
     echoCommand(p, pane, line);
     placeNew(p, from, from, free, .command);
     noteRun(p, pane, "run", line);
     return free;
 }
 
+/// The serial a command's `$winid` names: the pane it was run from, none
+/// (0) from a column's or the workspace's tag.
+fn winid(p: *const Pardes, src: ?*Pane) u32 {
+    if (p.exec_header) return 0;
+    return if (src) |s| s.serial else 0;
+}
+
 /// `% line` above a command's output, every command, as a shell echoes
 /// what it was given; its newlines the terminal's, so a multi-line command
 /// does not staircase.