Return all available data from git-blame

Returning this now to avoid having to change the function's return value
structure later on if we want to emit more information.

2 files changed, 25 insertions, 8 deletions

diff --git a/git/repo/base.py b/git/repo/base.py
index f74e0b59..0274c0a7 100644
--- a/git/repo/base.py
+++ b/git/repo/base.py
@@ -60,12 +60,15 @@ from git.compat import (
 import os
 import sys
 import re
+from collections import namedtuple
 
 DefaultDBType = GitCmdObjectDB
 if sys.version_info[:2] < (2, 5):     # python 2.4 compatiblity
     DefaultDBType = GitCmdObjectDB
 # END handle python 2.4
 
+BlameEntry = namedtuple('BlameEntry', ['commit', 'linenos', 'orig_path', 'orig_linenos'])
+
 
 __all__ = ('Repo', )
 
@@ -661,10 +664,10 @@ class Repo(object):
         """Iterator for blame information for the given file at the given revision.
 
         Unlike .blame(), this does not return the actual file's contents, only
-        a stream of (commit, range) tuples.
+        a stream of BlameEntry tuples.
 
         :parm rev: revision specifier, see git-rev-parse for viable options.
-        :return: lazy iterator of (git.Commit, range) tuples, where the commit
+        :return: lazy iterator of BlameEntry tuples, where the commit
                  indicates the commit to blame for the line, and range
                  indicates a span of line numbers in the resulting file.
 
@@ -678,9 +681,10 @@ class Repo(object):
         while True:
             line = next(stream)  # when exhausted, casues a StopIteration, terminating this function
 
-            hexsha, _, lineno, num_lines = line.split()
+            hexsha, orig_lineno, lineno, num_lines = line.split()
             lineno = int(lineno)
             num_lines = int(num_lines)
+            orig_lineno = int(orig_lineno)
             if hexsha not in commits:
                 # Now read the next few lines and build up a dict of properties
                 # for this commit
@@ -696,6 +700,7 @@ class Repo(object):
                     props[tag] = value
                     if tag == b'filename':
                         # "filename" formally terminates the entry for --incremental
+                        orig_filename = value
                         break
 
                 c = Commit(self, hex_to_bin(hexsha),
@@ -710,9 +715,14 @@ class Repo(object):
             else:
                 # Discard the next line (it's a filename end tag)
                 line = next(stream)
-                assert line.startswith(b'filename'), 'Unexpected git blame output'
-
-            yield commits[hexsha], range(lineno, lineno + num_lines)
+                tag, value = line.split(b' ', 1)
+                assert tag == b'filename', 'Unexpected git blame output'
+                orig_filename = value
+
+            yield BlameEntry(commits[hexsha],
+                             range(lineno, lineno + num_lines),
+                             safe_decode(orig_filename),
+                             range(orig_lineno, orig_lineno + num_lines))
 
     def blame(self, rev, file, incremental=False, **kwargs):
         """The blame information for the given file at the given revision.
diff --git a/git/test/test_repo.py b/git/test/test_repo.py
index ab6c502f..d7437d35 100644
--- a/git/test/test_repo.py
+++ b/git/test/test_repo.py
@@ -341,12 +341,19 @@ class TestRepo(TestBase):
         assert len(blame_output) == 5
 
         # Check all outputted line numbers
-        ranges = flatten([line_numbers for _, line_numbers in blame_output])
+        ranges = flatten([entry.linenos for entry in blame_output])
         assert ranges == flatten([range(2, 3), range(14, 15), range(1, 2), range(3, 14), range(15, 17)]), str(ranges)
 
-        commits = [c.hexsha[:7] for c, _ in blame_output]
+        commits = [entry.commit.hexsha[:7] for entry in blame_output]
         assert commits == ['82b8902', '82b8902', 'c76852d', 'c76852d', 'c76852d'], str(commits)
 
+        # Original filenames
+        assert all([entry.orig_path == u'AUTHORS' for entry in blame_output])
+
+        # Original line numbers
+        orig_ranges = flatten([entry.orig_linenos for entry in blame_output])
+        assert orig_ranges == flatten([range(2, 3), range(14, 15), range(1, 2), range(2, 13), range(13, 15)]), str(orig_ranges)  # noqa
+
     @patch.object(Git, '_call_process')
     def test_blame_complex_revision(self, git):
         git.return_value = fixture('blame_complex_revision')