$ keeps the selections a shell command exits 0 on, and line end is gl

$ was a second key for line end, which helix never meant: in helix it is
shell_keep_pipe. It now arms the pipe prompt with a $ marker, runs the
command once per range with that range's text on stdin, and keeps the ranges
it exits 0 on; the primary stays if kept, else the last kept range takes
over, and keeping none changes nothing. The runner's answer is all or
nothing, so the command runs in a subshell whose status is echoed as its
output. Line end stays on helix's own gl and End; the snapshots, tutor and
docs that pressed $ for it press gl.

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

1 files changed, 5 insertions, 1 deletions

diff --git a/test/panes.zig b/test/panes.zig
index 0b9909ad..f0e1ba3d 100644
--- a/test/panes.zig
+++ b/test/panes.zig
@@ -1954,7 +1954,11 @@ test "a prompt owns the pipe behavior through cancellation and submission" {
         p.update(.{ .key = .{ .cp = Key.enter } });
         const pending = p.pipe.wait orelse return error.MissingPipe;
         try std.testing.expectEqual(how, pending.how);
-        try std.testing.expectEqualStrings("cat", pending.command);
+        // `$` runs the command in a subshell that reports its status
+        if (how == .keep)
+            try std.testing.expect(std.mem.indexOf(u8, pending.command, "\ncat\n") != null)
+        else
+            try std.testing.expectEqualStrings("cat", pending.command);
         try std.testing.expectEqual(@as(usize, 1), pending.inputs.len);
         try std.testing.expectEqualStrings(if (how.pipes()) "one" else "", pending.inputs[0].bytes);
         try std.testing.expect(pane.prompt == .none);