info: Handle undefined mergeBranch

When a repo client is initialized with --standalone-manifest, it doesn't
have merge branch defined. This results in mergeBranch being None.

Bug: b/308025460
Change-Id: Iebceac0976e5d3adab5300bd8dfc76744a791234
Reviewed-on: https://gerrit-review.googlesource.com/c/git-repo/+/393716
Tested-by: Josip Sokcevic <sokcevic@google.com>
Reviewed-by: Mike Frysinger <vapier@google.com>
Commit-Queue: Josip Sokcevic <sokcevic@google.com>

1 files changed, 3 insertions, 1 deletions

diff --git a/subcmds/info.py b/subcmds/info.py
index f637600e..ab230ddd 100644
--- a/subcmds/info.py
+++ b/subcmds/info.py
@@ -97,7 +97,9 @@ class Info(PagedCommand):
             self.headtext(self.manifest.default.revisionExpr)
         self.out.nl()
         self.heading("Manifest merge branch: ")
-        self.headtext(mergeBranch)
+        # The manifest might not have a merge branch if it isn't in a git repo,
+        # e.g. if `repo init --standalone-manifest` is used.
+        self.headtext(mergeBranch or "")
         self.out.nl()
         self.heading("Manifest groups: ")
         self.headtext(manifestGroups)