Added a read-only Repo.active_branch property which returns the name of the currently active branch.

Author: dokai

lib/git/repo.py

@@ -458,5 +458,19 @@ def is_dirty(self):
 
         return len(self.git.diff('HEAD').strip()) > 0
 
+    @property
+    def active_branch(self):
+        """
+        The name of the currently active branch.
+        
+        Returns
+            str (the branch name)
+        """
+        branch = self.git.symbolic_ref('HEAD').strip()
+        if branch.startswith('refs/heads/'):
+            branch = branch[len('refs/heads/'):]
+
+        return branch
+
     def __repr__(self):
         return '<GitPython.Repo "%s">' % self.path

test/git/test_repo.py

@@ -307,10 +307,16 @@ def test_is_dirty_with_clean_working_dir(self, git):
         git.return_value = ''
         assert_false(self.repo.is_dirty)
         assert_equal(git.call_args, (('diff', 'HEAD'), {}))
-    
+
     @patch(Git, '_call_process')
     def test_is_dirty_with_dirty_working_dir(self, git):
         self.repo.bare = False
         git.return_value = '''-aaa\n+bbb'''
         assert_true(self.repo.is_dirty)
         assert_equal(git.call_args, (('diff', 'HEAD'), {}))
+
+    @patch(Git, '_call_process')
+    def test_active_branch(self, git):
+        git.return_value = 'refs/heads/major-refactoring'
+        assert_equal(self.repo.active_branch, 'major-refactoring')
+        assert_equal(git.call_args, (('symbolic_ref', 'HEAD'), {}))