Make git.Repository.status() also return None

Fixes #326

powerline/lib/vcs/git.py

@@ -73,7 +73,8 @@ try:
 							| git.GIT_STATUS_INDEX_MODIFIED
 							| git.GIT_STATUS_INDEX_DELETED):
 						index_column = 'I'
-				return wt_column + index_column + untracked_column
+				r = wt_column + index_column + untracked_column
+				return r if r != '   ' else None
 
 		def branch(self):
 			try:
@@ -132,7 +133,7 @@ except ImportError:
 						wt_column = 'D'
 
 				r = wt_column + index_column + untracked_column
-				return r
+				return r if r != '   ' else None
 
 		def branch(self):
 			for line in self._gitcmd('branch', '-l'):

powerline/segments/common.py

@@ -55,7 +55,7 @@ def branch(status_colors=True):
 		if status_colors:
 			return [{
 				'contents': branch,
-				'highlight_group': ['branch_dirty' if repo.status().strip() else 'branch_clean', 'branch'],
+				'highlight_group': ['branch_dirty' if repo.status() else 'branch_clean', 'branch'],
 				}]
 		else:
 			return branch

powerline/segments/vim.py

@@ -320,7 +320,7 @@ def branch(segment_info, status_colors=True):
 	if repo:
 		return [{
 			'contents': repo.branch(),
-			'highlight_group': (['branch_dirty' if repo.status().strip() else 'branch_clean'] if status_colors else []) + ['branch'],
+			'highlight_group': (['branch_dirty' if repo.status() else 'branch_clean'] if status_colors else []) + ['branch'],
 			'divider_highlight_group': 'branch:divider',
 		}]
 	return None

tests/test_lib.py

@@ -48,7 +48,7 @@ class TestVCS(TestCase):
 		repo = guess(path=GIT_REPO)
 		self.assertNotEqual(repo, None)
 		self.assertEqual(repo.branch(), 'master')
-		self.assertEqual(repo.status(), '   ')
+		self.assertEqual(repo.status(), None)
 		self.assertEqual(repo.status('file'), None)
 		with open(os.path.join(GIT_REPO, 'file'), 'w') as f:
 			f.write('abc')
@@ -69,6 +69,7 @@ class TestVCS(TestCase):
 			repo = guess(path=HG_REPO)
 			self.assertNotEqual(repo, None)
 			self.assertEqual(repo.branch(), 'default')
+			self.assertEqual(repo.status(), None)
 			with open(os.path.join(HG_REPO, 'file'), 'w') as f:
 				f.write('abc')
 				f.flush()

tests/test_segments.py

@@ -46,7 +46,7 @@ class TestCommon(TestCase):
 			self.assertEqual(common.user(), [{'contents': 'def', 'highlight_group': ['superuser', 'user']}])
 
 	def test_branch(self):
-		with replace_module_attr(common, 'guess', lambda path: Args(branch=lambda: os.path.basename(path), status=lambda: '   ')):
+		with replace_module_attr(common, 'guess', lambda path: Args(branch=lambda: os.path.basename(path), status=lambda: None)):
 			self.assertEqual(common.branch(status_colors=False), 'tests')
 			self.assertEqual(common.branch(status_colors=True),
 					[{'contents': 'tests', 'highlight_group': ['branch_clean', 'branch']}])