updated ChangeLog with new git2changelog.py

git2changelog.py

@@ -0,0 +1,40 @@
+#!/usr/bin/env python
+
+# Copyright (C) 2013 nu774
+# For conditions of distribution and use, see copyright notice in COPYING
+
+import sys
+import re
+from subprocess import Popen, PIPE
+from itertools import groupby
+from collections import namedtuple
+
+GITLOG_FMT = 'commit %H%nauthor %cn <%ae>%ndate %ad%nsubject %s%nref %d%n%n'
+GITLOG_CMD = ['git','log','--date=short','--format={0}'.format(GITLOG_FMT)]
+
+Commit = namedtuple('Commit', 'commit author date subject ref')
+
+def parse_gitlog(stream):
+    re_decode_tag = re.compile(r'(?<=\()([^,)]+)')
+    commit = dict()
+    for line in stream:
+        fields = line.decode('utf-8').rstrip('\r\n').split(' ', 1)
+        if len(fields) == 2:
+            key, value = fields
+            if key == 'ref':
+                m = re_decode_tag.search(value)
+                value = ' [{0}]'.format(m.group()) if m else ''
+            commit[key] = value
+        elif commit:
+            yield Commit(**commit) 
+            commit = dict()
+
+output=sys.stdout.write
+
+with Popen(GITLOG_CMD, shell=False, stdout=PIPE).stdout as pipe:
+    commits = parse_gitlog(pipe)
+    commits_by_date_author = groupby(commits, key=lambda x: (x.date, x.author))
+    for (date, author), commits in commits_by_date_author:
+        output('{0}  {1}\n\n'.format(date, author))
+        for c in commits:
+            output('  * {0}{1}\n\n'.format(c.subject, c.ref))