contrib/git-fix-changelog.py

   1 #!/usr/bin/env python3
   2
   3 # Copyright (C) 2020-2023 Free Software Foundation, Inc.
   4 #
   5 # This file is part of GCC.
   6 #
   7 # GCC is free software; you can redistribute it and/or modify
   8 # it under the terms of the GNU General Public License as published by
   9 # the Free Software Foundation; either version 3, or (at your option)
  10 # any later version.
  11 #
  12 # GCC is distributed in the hope that it will be useful,
  13 # but WITHOUT ANY WARRANTY; without even the implied warranty of
  14 # MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  15 # GNU General Public License for more details.
  16 #
  17 # You should have received a copy of the GNU General Public License
  18 # along with GCC; see the file COPYING.  If not, write to
  19 # the Free Software Foundation, 51 Franklin Street, Fifth Floor,
  20 # Boston, MA 02110-1301, USA.
  21 #
  22 # The script tries to fix commit message where ChangeLog entries
  23 # can point to .cc renamed files.
  24
  25 import argparse
  26 import os
  27 import subprocess
  28 import tempfile
  29
  30 DESCRIPTION = 'Fix up ChangeLog of the current commit.'
  31
  32 script_folder = os.path.dirname(os.path.abspath(__file__))
  33 verify_script = os.path.join(script_folder,
  34                              'gcc-changelog/git_check_commit.py')
  35
  36
  37 def replace_file_in_changelog(lines, filename, fixed):
  38     # consider all componenets of a path: gcc/ipa-icf.cc
  39     while filename:
  40         for i, line in enumerate(lines):
  41             if filename in line:
  42                 lines[i] = line.replace(filename, fixed)
  43                 return
  44
  45         parts = filename.split('/')
  46         if len(parts) == 1:
  47             return
  48         filename = '/'.join(parts[1:])
  49         fixed = '/'.join(fixed.split('/')[1:])
  50
  51
  52 if __name__ == '__main__':
  53     parser = argparse.ArgumentParser(description=DESCRIPTION)
  54     args = parser.parse_args()
  55
  56     # Update commit message if change for a .cc file was taken
  57     r = subprocess.run(f'{verify_script} HEAD', shell=True, encoding='utf8',
  58                        stdout=subprocess.PIPE, stderr=subprocess.PIPE)
  59     if r.returncode != 0:
  60         lines = r.stdout.splitlines()
  61         cmd = 'git show -s --format=%B'
  62         commit_message = subprocess.check_output(cmd, shell=True,
  63                                                  encoding='utf8').strip()
  64         commit_message = commit_message.splitlines()
  65
  66         # Parse the following lines:
  67         # ERR: unchanged file mentioned in a ChangeLog \
  68         # (did you mean "gcc/ipa-icf.cc"?): "gcc/ipa-icf.c"
  69         replaced = 0
  70         for line in lines:
  71             if ('unchanged file mentioned' in line and
  72                     'did you mean' in line):
  73                 filename = line.split()[-1].strip('"')
  74                 fixed = line[line.index('did you mean'):]
  75                 fixed = fixed[fixed.index('"') + 1:]
  76                 fixed = fixed[:fixed.index('"')]
  77
  78                 if filename.count('/') == fixed.count('/'):
  79                     replace_file_in_changelog(commit_message, filename, fixed)
  80                     replaced += 1
  81
  82         if replaced:
  83             with tempfile.NamedTemporaryFile('w', encoding='utf8',
  84                                              delete=False) as w:
  85                 w.write('\n'.join(commit_message))
  86                 w.close()
  87                 subprocess.check_output(f'git commit --amend -F {w.name}',
  88                                         shell=True, encoding='utf8')
  89                 os.unlink(w.name)
  90                 print(f'Commit message updated: {replaced} file(s) renamed.')
  91         else:
  92             print('Commit message has not been updated.')