Add --field=patch to git cl status printing the patchset of the current issue.

git-cl

Index: git-cl
diff --git a/git-cl b/git-cl
index fb1e91ab08bf45b4ebc915d1e520cbf01a48f528..1d0a719d1e1d3fe10cc3544232ad5ccf34a6a417 100755
--- a/git-cl
+++ b/git-cl
@@ -224,6 +224,8 @@ class Changelist(object):
     self.issue = None
     self.has_description = False
     self.description = None
+    self.has_patchset = False
+    self.patchset = None
 
   def GetBranch(self):
     """Returns the short branch name, e.g. 'master'."""
@@ -487,7 +489,8 @@ def CmdConfig(args):
 
 def CmdStatus(args):
   parser = optparse.OptionParser(usage='git cl status [options]')
-  parser.add_option('--field', help='print only specific field (desc|id|url)')
+  parser.add_option('--field',
+                    help='print only specific field (desc|id|patch|url)')
   (options, args) = parser.parse_args(args)
 
   # TODO: maybe make show_branches a flag if necessary.
@@ -506,9 +509,17 @@ def CmdStatus(args):
     if options.field.startswith('desc'):
       print cl.GetDescription()
     elif options.field == 'id':
-      print cl.GetIssue()
+      id = cl.GetIssue()
+      if id:
+        print id
+    elif options.field == 'patch':
+      patchset = cl.GetPatchset()
+      if patchset:
+        print patchset
     elif options.field == 'url':
-      print cl.GetIssueURL()
+      url = cl.GetIssueURL()
+      if url:
+        print url
   else:
     print
     print 'Current branch:',