init: show a notice when reinitializing

Make it clear to users when we're reinitializing an existing checkout
in case they weren't expecting it.

Bug: https://crbug.com/gerrit/12396
Change-Id: I22e89ae041a8e7b147c9d06a82f1302dd5807ae0
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/343535
Reviewed-by: LaMont Jones <lamontjones@google.com>
Tested-by: Mike Frysinger <vapier@google.com>

1 files changed, 7 insertions, 0 deletions

diff --git a/subcmds/init.py b/subcmds/init.py
index bcccae06..803f39a6 100644
--- a/subcmds/init.py
+++ b/subcmds/init.py
@@ -315,6 +315,13 @@ to update the working directory files.
       # Older versions of git supported worktree, but had dangerous gc bugs.
       git_require((2, 15, 0), fail=True, msg='git gc worktree corruption')
 
+    # Provide a short notice that we're reinitializing an existing checkout.
+    # Sometimes developers might not realize that they're in one, or that
+    # repo doesn't do nested checkouts.
+    existing_checkout = self.manifest.manifestProject.Exists
+    if not opt.quiet and existing_checkout:
+      print('repo: reusing existing repo client checkout in', self.manifest.topdir)
+
     self._SyncManifest(opt)
 
     if os.isatty(0) and os.isatty(1) and not self.manifest.IsMirror: