use canonical base URL for projects

git_cl.py

Index: git_cl.py
diff --git a/git_cl.py b/git_cl.py
index 06594f0404ed534b938239da25437cac45089f70..6e564010d1a47e59752891611b37fbce551a643b 100755
--- a/git_cl.py
+++ b/git_cl.py
@@ -635,12 +635,17 @@ or verify this branch is set up to track another (via the --track argument to
     return True
 
   def GetGitBaseUrlFromConfig(self):
-    """Return the configured base URL from branch.<branchname>.baseurl.
+    """Return the configured base URL from branch.<branchname>.canonical-url.
 
     Returns None if it is not set.
     """
-    return RunGit(['config', 'branch.%s.base-url' % self.GetBranch()],
-                  error_ok=True).strip()
+    branch = self.GetBranch()
+    url = RunGit(['config', 'branch.%s.canonical-url' % branch],
+                 error_ok=True).strip()
+    if not url:
+      url = RunGit(['config', 'branch.%s.base-url' % branch],
+                   error_ok=True).strip()
+    return url
 
   def GetRemoteUrl(self):
     """Return the configured remote URL, e.g. 'git://example.org/foo.git/'.
@@ -1074,6 +1079,13 @@ def LoadCodereviewSettingsFromFile(fileobj):
     RunGit(['config', keyvals['PUSH_URL_CONFIG'],
             keyvals['ORIGIN_URL_CONFIG']])
 
+  if 'CANONICAL_URL' in keyvals:
+    branchref = RunGit(['symbolic-ref', 'HEAD']).strip()
+    branch = ShortBranchName(branchref)
+    RunGit(['config', 'branch.%s.canonical-url' % branch,
+            keyvals['CANONICAL_URL']],
+          error_ok=False)
+
 
 def urlretrieve(source, destination):
   """urllib is broken for SSL connections via a proxy therefore we