sync: Sync submodules correctly again

Commit b4429439 (sync: refactor main fetch loop) broke syncing of
submodules with sync-s="true". The first `repo sync` would just fetch
the superrepo, while the second `repo sync` would fetch the submodules.
This was due to the new _FetchMain() function not passing back the
all_projects variable that it had modified.

Change-Id: Ie8187cde7bb894e4e9a6b76c2aed83873d9f69a4
Signed-off-by: Peter Kjellerstedt <peter.kjellerstedt@axis.com>
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/307065
Reviewed-by: Mike Frysinger <vapier@google.com>

project.py

@@ -2197,7 +2197,7 @@ class Project(object):
         ret = prunecmd.Wait()
         if ret:
           break
-        output_redir.write('retrying fetch after pruning remote branches')
+        print('retrying fetch after pruning remote branches', file=output_redir)
         # Continue right away so we don't sleep as we shouldn't need to.
         continue
       elif current_branch_only and is_sha1 and ret == 128:
@@ -2210,10 +2210,11 @@ class Project(object):
         break
 
       # Figure out how long to sleep before the next attempt, if there is one.
-      if not verbose:
+      if not verbose and gitcmd.stdout:
-        output_redir.write('\n%s:\n%s' % (self.name, gitcmd.stdout))
+        print('\n%s:\n%s' % (self.name, gitcmd.stdout), end='', file=output_redir)
       if try_n < retry_fetches - 1:
-        output_redir.write('sleeping %s seconds before retrying' % retry_cur_sleep)
+        print('%s: sleeping %s seconds before retrying' % (self.name, retry_cur_sleep),
+              file=output_redir)
         time.sleep(retry_cur_sleep)
         retry_cur_sleep = min(retry_exp_factor * retry_cur_sleep,
                               MAXIMUM_RETRY_SLEEP_SEC)

subcmds/sync.py

@@ -469,11 +469,14 @@ later is required to fix a server side protocol bug.
     Args:
       opt: Program options returned from optparse.  See _Options().
       args: Command line args used to filter out projects.
-      all_projects: List of all projects that should be checked out.
+      all_projects: List of all projects that should be fetched.
       err_event: Whether an error was hit while processing.
       manifest_name: Manifest file to be reloaded.
       load_local_manifests: Whether to load local manifests.
       ssh_proxy: SSH manager for clients & masters.
+
+    Returns:
+      List of all projects that should be checked out.
     """
     rp = self.manifest.repoProject
 
@@ -520,6 +523,8 @@ later is required to fix a server side protocol bug.
         err_event.set()
       fetched.update(new_fetched)
 
+    return all_projects
+
   def _CheckoutOne(self, detach_head, force_sync, project):
     """Checkout work tree for one project
 
@@ -1006,8 +1011,9 @@ later is required to fix a server side protocol bug.
         with ssh.ProxyManager(manager) as ssh_proxy:
           # Initialize the socket dir once in the parent.
           ssh_proxy.sock()
-          self._FetchMain(opt, args, all_projects, err_event, manifest_name,
+          all_projects = self._FetchMain(opt, args, all_projects, err_event,
-                          load_local_manifests, ssh_proxy)
+                                         manifest_name, load_local_manifests,
+                                         ssh_proxy)
 
       if opt.network_only:
         return