contrib/gcc-changelog/git_email.py

   1 #!/usr/bin/env python3
   2 #
   3 # This file is part of GCC.
   4 #
   5 # GCC is free software; you can redistribute it and/or modify it under
   6 # the terms of the GNU General Public License as published by the Free
   7 # Software Foundation; either version 3, or (at your option) any later
   8 # version.
   9 #
  10 # GCC is distributed in the hope that it will be useful, but WITHOUT ANY
  11 # WARRANTY; without even the implied warranty of MERCHANTABILITY or
  12 # FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License
  13 # for more details.
  14 #
  15 # You should have received a copy of the GNU General Public License
  16 # along with GCC; see the file COPYING3.  If not see
  17 # <http://www.gnu.org/licenses/>.  */
  18
  19 import os
  20 import sys
  21 from itertools import takewhile
  22
  23 from dateutil.parser import parse
  24
  25 from git_commit import GitCommit
  26
  27 from unidiff import PatchSet
  28
  29 DATE_PREFIX = 'Date: '
  30 FROM_PREFIX = 'From: '
  31
  32
  33 class GitEmail(GitCommit):
  34     def __init__(self, filename, strict=False):
  35         self.filename = filename
  36         diff = PatchSet.from_filename(filename)
  37         date = None
  38         author = None
  39
  40         with open(self.filename, 'r') as f:
  41             lines = f.read().splitlines()
  42         lines = list(takewhile(lambda line: line != '---', lines))
  43         for line in lines:
  44             if line.startswith(DATE_PREFIX):
  45                 date = parse(line[len(DATE_PREFIX):])
  46             elif line.startswith(FROM_PREFIX):
  47                 author = GitCommit.format_git_author(line[len(FROM_PREFIX):])
  48         header = list(takewhile(lambda line: line != '', lines))
  49         body = lines[len(header) + 1:]
  50
  51         modified_files = []
  52         for f in diff:
  53             # Strip "a/" and "b/" prefixes
  54             source = f.source_file[2:]
  55             target = f.target_file[2:]
  56
  57             if f.is_added_file:
  58                 t = 'A'
  59             elif f.is_removed_file:
  60                 t = 'D'
  61             elif f.is_rename:
  62                 # Consider that renamed files are two operations: the deletion
  63                 # of the original name and the addition of the new one.
  64                 modified_files.append((source, 'D'))
  65                 t = 'A'
  66             else:
  67                 t = 'M'
  68             modified_files.append((target, t))
  69         super().__init__(None, date, author, body, modified_files,
  70                          strict=strict, commit_to_date_hook=lambda x: date)
  71
  72
  73 # With zero arguments, process every patch file in the ./patches directory.
  74 # With one argument, process the named patch file.
  75 # Patch files must be in 'git format-patch' format.
  76 if __name__ == '__main__':
  77     if len(sys.argv) == 1:
  78         allfiles = []
  79         for root, _dirs, files in os.walk('patches'):
  80             for f in files:
  81                 full = os.path.join(root, f)
  82                 allfiles.append(full)
  83
  84         success = 0
  85         for full in sorted(allfiles):
  86             email = GitEmail(full, False)
  87             print(email.filename)
  88             if email.success:
  89                 success += 1
  90                 print('  OK')
  91             else:
  92                 for error in email.errors:
  93                     print('  ERR: %s' % error)
  94
  95         print()
  96         print('Successfully parsed: %d/%d' % (success, len(allfiles)))
  97     else:
  98         email = GitEmail(sys.argv[1], False)
  99         if email.success:
 100             print('OK')
 101             email.print_output()
 102         else:
 103             if not email.lines:
 104                 print('Error: patch contains no parsed lines', file=sys.stderr)
 105             email.print_errors()
 106             sys.exit(1)