sync: Don't process project.list in a mirror

We have no working tree, so we cannot update the project.list
state file, nor should we try to delete a directory if a project is
removed from the manifest.  Clients would still need the repository
for historical records.

Signed-off-by: Shawn O. Pearce <sop@google.com>

1 files changed, 4 insertions, 0 deletions

diff --git a/subcmds/sync.py b/subcmds/sync.py
index ecb89a10..ad05cadd 100644
--- a/subcmds/sync.py
+++ b/subcmds/sync.py
@@ -217,6 +217,10 @@ uncommitted changes are present' % project.relpath
             missing.append(project)
         self._Fetch(missing)
 
+    if self.manifest.IsMirror:
+      # bail out now, we have no working tree
+      return
+
     if self.UpdateProjectList():
       sys.exit(1)