mk/git-changelog

   1 #!/usr/bin/env python
   2
   3 # git-changelog
   4 #
   5 # version 2.0, by John Wiegley
   6 #
   7 # The purpose of this code is to turn "git log" output into a complete
   8 # ChangeLog, for projects who wish to begin using a ChangeLog, but haven't
   9 # been.
  10 #
  11 # This version of git-changelog depends on GitPython:
  12 #   git://gitorious.org/git-python/mainline.git
  13
  14 import time
  15 import string
  16 import sys
  17 import re
  18 import os
  19
  20 from git import *               # GitPython
  21 from subprocess import *
  22
  23 repo = Repo(os.getcwd())
  24 ref  = 'origin/master..'
  25 path = ''
  26
  27 # Usage: git changelog [COMMITISH] [-- [PATH]]
  28
  29 saw_dashdash = False
  30 if len(sys.argv) > 1:
  31     for arg in sys.argv[1:]:
  32         if arg == "--":
  33             saw_dashdash = True
  34         elif saw_dashdash:
  35             path = arg
  36         else:
  37             ref = arg
  38
  39 for commit in repo.iter_commits(ref, paths=path):
  40     hash_id  = commit.sha
  41     author   = commit.author
  42     date     = commit.committed_date
  43     log_text = commit.message.split('\n')[0]
  44
  45     log_text_remainder = commit.message.split('\n\n')[1:]
  46     while len(log_text_remainder) > 0 and not log_text_remainder[0]:
  47         log_text_remainder = log_text_remainder[1:]
  48     log_text_remainder = string.join(log_text_remainder, '\n\t')
  49     if log_text_remainder:
  50         log_text_remainder = '\n\t' + log_text_remainder
  51
  52     diff = commit.diff(commit.parents[0])
  53     files = []
  54     for f in diff:
  55         if not f.a_blob:
  56             p = f.b_blob.path
  57         elif not f.b_blob:
  58             p = f.a_blob.path
  59         else:
  60             continue
  61
  62         p2 = re.sub('^' + path + '/', '', p)
  63         if p != p2:
  64             files.append(p2)
  65
  66     fp = Popen(["fmt", "-72"], shell = True, stdin = PIPE, stdout = PIPE)
  67     if files:
  68         fp.stdin.write("\t* %s: %s" % (string.join(files, ",\n\t"), log_text))
  69     else:
  70         fp.stdin.write("\t* %s" % log_text)
  71     fp.stdin.close()
  72     log_text = fp.stdout.read()
  73     del fp
  74
  75     print "%s  %s  <%s>\n" % \
  76         (time.strftime("%Y-%m-%d", time.gmtime(date)),
  77          author.name, author.email)
  78
  79     if path:
  80         log_text = re.sub(' ' + path + '/', ' ', log_text)
  81         log_text_remainder = re.sub(' ' + path + '/', ' ', log_text_remainder)
  82
  83     # If the log_text_remainder already begins with a *, then use that as the
  84     # changelog text.
  85     if re.match('\s+\* ', log_text_remainder):
  86         if log_text_remainder[0] == '\n':
  87             print log_text_remainder[1:]
  88         else:
  89             print log_text_remainder
  90     else:
  91         print "%s%s" % (log_text, log_text_remainder)
  92
  93 # git-changelog ends here