Add "archive" command to git_cl.py.

git_cl.py

Index: git_cl.py
diff --git a/git_cl.py b/git_cl.py
index 35785ebdf0443e4c86784f4c820b0a7c71ca9103..4c7cd93adcc1ff270c50f2d8059a269e147b9f35 100755
--- a/git_cl.py
+++ b/git_cl.py
@@ -2947,6 +2947,10 @@ def get_cl_statuses(changes, fine_grained, max_processes=None):
       fetch = lambda cl: (cl, cl.GetStatus())
       yield fetch(changes[0])
 
+      if len(changes) == 0:
+        # Exit early if there was only one branch to fetch.
+        return
+
       changes_to_fetch = changes[1:]
       pool = ThreadPool(
           min(max_processes, len(changes_to_fetch))
@@ -3073,6 +3077,68 @@ def upload_branch_deps(cl, args):
 
   return 0
 
+def CMDcleanup(parser, args):
+  """Archives and deletes branches associated with closed changelists."""
+  parser.add_option(
+      '-j', '--maxjobs', action='store', type=int,
+      help='The maximum number of jobs to use when retrieving review status')
+
+  parser.add_option(
+      '-f', action='store_true', dest='force', default=False,
+      help='Bypasses the confirmation prompt.')
+
+  auth.add_auth_options(parser)
+  options, args = parser.parse_args(args)
+  if args:
+    parser.error('Unsupported args: %s' % ' '.join(args))
+  auth_config = auth.extract_auth_config_from_options(options)
+
+  branches = RunGit(['for-each-ref', '--format=%(refname)', 'refs/heads'])
+  if not branches:
+    print 'No local branch found.'
+    return 0
+
+  print 'Finding all branches associated with closed issues...'
+  changes = [Changelist(branchref=b, auth_config=auth_config)
+              for b in branches.splitlines()]
+  alignment = max(5, max(len(c.GetBranch()) for c in changes))
+  statuses = get_cl_statuses(changes,
+                             fine_grained=True,
+                             max_processes=options.maxjobs)
+  proposal = [(cl.GetBranch(),
+               'git-cl-closed-%s-%s' % (cl.GetBranch(), cl.GetIssue()))
+              for cl, status in statuses
+              if status == 'closed']
+
+  if len(proposal) == 0:
+    print 'No branches with closed codereview issues found.'
+    return 0
+
+  current_branch = RunGit(['symbolic-ref', 'HEAD', '--short']).strip()

[tandrii(chromium), 2016/05/31 20:18:32]

use existing func:
current_branch = GetCurrentBranch()

[Kevin M, 2016/05/31 20:26:35]

Done.

+  print "Current branch: " + current_branch
+
+  if any(branch == current_branch for branch, _ in proposal):

[tandrii(chromium), 2016/05/31 20:18:33]

I'd print all the branches with closed issues first, and then do this check.
WDYT?

[Kevin M, 2016/05/31 20:26:35]

Done.

+    print 'You are currently using a branch associated with a closed'

[tandrii(chromium), 2016/05/31 20:18:33]

s/using a branch associated/on a branch %s associated

and %s is current_branch. And I'd not print it above, as in normal case, it's
not important to the command.

[Kevin M, 2016/05/31 20:26:35]

Done.

+    print 'codereview issue, so cleanup cannot proceed. Please change to '

[tandrii(chromium), 2016/05/31 20:18:33]

use 1 print statement (basically, call) and don't format this yourself:

print ('You are currently using a branch associated with a closed '
       'codereview issue, so cleanup cannot proceed. ....
       '...')

[Kevin M, 2016/05/31 20:26:35]

Done.

+    print 'another branch and run \'git cl cleanup\' again.'
+    return 1
+
+  print '\nBranches with closed issues that will be tagged and deleted:'
+  print '%*s | %s' % (alignment, 'Branch name', 'Archival tag name')
+  for next_item in proposal:
+    print '%*s   %s' % (alignment, next_item[0], next_item[1])
+
+  if not options.force:
+    if ask_for_data('\nProceed with deletion (Y/N)? ').lower() != 'y':
+      print 'Aborted.'
+      return 1
+
+  for branch, tagname in proposal:
+    RunGit(['tag', tagname, branch])
+    RunGit(['branch', '-D', branch])
+  print '\nJob\'s done!'
+
+  return 0
 
 def CMDstatus(parser, args):
   """Show status of changelists.