More debug.

git_cl.py

Index: git_cl.py
diff --git a/git_cl.py b/git_cl.py
index c43b62106110ac5a351f6cf5bcbfcb557d04da02..07cda7fa6d335244f2bc81db19ee107f8f35e778 100755
--- a/git_cl.py
+++ b/git_cl.py
@@ -97,9 +97,14 @@ def GetNoGitPagerEnv():
 
 def RunCommand(args, error_ok=False, error_message=None, shell=False, **kwargs):
   try:
-    return subprocess2.check_output(args, shell=shell, **kwargs)
+    out = subprocess2.check_output(args, shell=shell, **kwargs)
+    logging.debug('output of %s is\n%s\n', args,
+        '\n'.join('  ' + l for l in out.splitlines()))
+    return out
   except subprocess2.CalledProcessError as e:
     logging.debug('Failed running %s', args)
+    logging.debug('output of %s is\n%s\n', args,
+        '\n'.join('  ' + l for l in e.stdout.splitlines()) if e.stdout else '')
     if not error_ok:
       DieWithError(
           'Command "%s" failed.\n%s' % (
@@ -123,9 +128,13 @@ def RunGitWithCode(args, suppress_stderr=False):
                                              env=GetNoGitPagerEnv(),
                                              stdout=subprocess2.PIPE,
                                              stderr=stderr)
+    logging.debug('output of %s is\n%s\n', args,
+        '\n'.join('  ' + l for l in out.splitlines()))
     return code, out
   except subprocess2.CalledProcessError as e:
     logging.debug('Failed running %s', args)
+    logging.debug('output of %s is\n%s\n', args,
+        '\n'.join('  ' + l for l in e.stdout.splitlines()) if e.stdout else '')
     return e.returncode, e.stdout
 
 
@@ -2024,6 +2033,7 @@ class _RietveldChangelistImpl(_ChangelistCodereviewBase):
       # Look for dependent patchsets. See crbug.com/480453 for more details.
       remote, upstream_branch = self.FetchUpstreamTuple(self.GetBranch())
       upstream_branch = ShortBranchName(upstream_branch)
+      logging.debug('remote: %s, upstream: %s', remote, upstream_branch)
       if remote is '.':
         # A local branch is being tracked.
         local_branch = upstream_branch
@@ -2036,9 +2046,13 @@ class _RietveldChangelistImpl(_ChangelistCodereviewBase):
           auth_config = auth.extract_auth_config_from_options(options)
           branch_cl = Changelist(branchref='refs/heads/'+local_branch,
                                  auth_config=auth_config)
+          logging.debug('upstream cl: Gerrit=%s', branch_cl.IsGerrit())
           branch_cl_issue_url = branch_cl.GetIssueURL()
           branch_cl_issue = branch_cl.GetIssue()
           branch_cl_patchset = branch_cl.GetPatchset()
+          logging.debug('upstream cl: url %s issue %s pachset %s',
+            branch_cl_issue_url, branch_cl_issue , branch_cl_patchset)
+
           if branch_cl_issue_url and branch_cl_issue and branch_cl_patchset:
             upload_args.extend(
                 ['--depends_on_patchset', '%s:%s' % (