When writing manifest, set the dest-branch attribute for projects

When generating a revision locked manifest, we need to know what
ref to push changes to when doing 'repo upload'.  This information
is lost when we lock the revision attribute to a particular commit
hash, so we need to expose it through the dest-branch attribute.

Bug: https://crbug.com/1005103
Test: manual execution
Change-Id: Ib31fd77ad8c9379759c4181dac1ea97de43eec35
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/263572
Tested-by: Sean McAllister <smcallis@google.com>
Reviewed-by: Mike Frysinger <vapier@google.com>

1 files changed, 8 insertions, 1 deletions

diff --git a/manifest_xml.py b/manifest_xml.py
index edcbadae..b2918cac 100644
--- a/manifest_xml.py
+++ b/manifest_xml.py
@@ -284,7 +284,7 @@ https://gerrit.googlesource.com/git-repo/+/HEAD/docs/manifest-format.md
   def _ParseGroups(self, groups):
     return [x for x in re.split(r'[,\s]+', groups) if x]
 
-  def Save(self, fd, peg_rev=False, peg_rev_upstream=True, groups=None):
+  def Save(self, fd, peg_rev=False, peg_rev_upstream=True, peg_rev_dest_branch=True, groups=None):
     """Write the current manifest out to the given file descriptor.
     """
     mp = self.manifestProject
@@ -389,6 +389,13 @@ https://gerrit.googlesource.com/git-repo/+/HEAD/docs/manifest-format.md
             # Only save the origin if the origin is not a sha1, and the default
             # isn't our value
             e.setAttribute('upstream', p.revisionExpr)
+
+        if peg_rev_dest_branch:
+          if p.dest_branch:
+            e.setAttribute('dest-branch', p.dest_branch)
+          elif value != p.revisionExpr:
+            e.setAttribute('dest-branch', p.revisionExpr)
+
       else:
         revision = self.remotes[p.remote.orig_name].revision or d.revisionExpr
         if not revision or revision != p.revisionExpr: