sync: Suggest "git repack -a -d" in bloat warning

The warning suggests running "repo sync --auto-gc" which runs "git gc
--auto". Git may decide not to repack if its internal thresholds are not
met, leaving the warning active even after running the suggested
command.

"git repack -a -d" forces all reachable objects into a single pack and
deletes redundant packs, reducing the pack count to 1. This guarantees
that the warning (which triggers when pack count exceeds 10) goes away.

Bug: 505755299
Change-Id: I10163ef8efb7f3b7c5055378ad95051974d11b88
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/580821
Reviewed-by: Becky Siegel <beckysiegel@google.com>
Commit-Queue: Gavin Mak <gavinmak@google.com>
Tested-by: Gavin Mak <gavinmak@google.com>

1 files changed, 2 insertions, 2 deletions

diff --git a/subcmds/sync.py b/subcmds/sync.py
index 7e7a2d3c0..5aec277a0 100644
--- a/subcmds/sync.py
+++ b/subcmds/sync.py
@@ -2151,8 +2151,8 @@ later is required to fix a server side protocol bug.
         for project_name in sorted(self._bloated_projects):
             warn_msg = (
                 f'warning: Project "{project_name}" is accumulating '
-                'unoptimized data. Please run "repo sync --auto-gc" or '
-                '"repo gc --repack" to clean up.'
+                'unoptimized data. Please run "git repack -a -d" in the '
+                'project directory or "repo gc --repack" to clean up.'
             )
             self.git_event_log.ErrorEvent(warn_msg)
             logger.warning(warn_msg)