bin/git_sha1_gen.py

   1 #!/usr/bin/env python
   2
   3 """
   4 Generate the contents of the git_sha1.h file.
   5 The output of this script goes to stdout.
   6 """
   7
   8
   9 import argparse
  10 import os
  11 import os.path
  12 import subprocess
  13 import sys
  14
  15
  16 def get_git_sha1():
  17     """Try to get the git SHA1 with git rev-parse."""
  18     git_dir = os.path.join(os.path.dirname(sys.argv[0]), '..', '.git')
  19     try:
  20         git_sha1 = subprocess.check_output([
  21             'git',
  22             '--git-dir=' + git_dir,
  23             'rev-parse',
  24             'HEAD',
  25         ], stderr=open(os.devnull, 'w')).decode("ascii")
  26     except:
  27         # don't print anything if it fails
  28         git_sha1 = ''
  29     return git_sha1
  30
  31 parser = argparse.ArgumentParser()
  32 parser.add_argument('--output', help='File to write the #define in',
  33         required=True)
  34 args = parser.parse_args()
  35
  36 git_sha1 = os.environ.get('MESA_GIT_SHA1_OVERRIDE', get_git_sha1())[:10]
  37 if git_sha1:
  38     git_sha1_h_in_path = os.path.join(os.path.dirname(sys.argv[0]),
  39             '..', 'src', 'git_sha1.h.in')
  40     with open(git_sha1_h_in_path , 'r') as git_sha1_h_in:
  41         new_sha1 = git_sha1_h_in.read().replace('@VCS_TAG@', git_sha1)
  42         if os.path.isfile(args.output):
  43             with open(args.output, 'r') as git_sha1_h:
  44                 if git_sha1_h.read() == new_sha1:
  45                     quit()
  46         with open(args.output, 'w') as git_sha1_h:
  47             git_sha1_h.write(new_sha1)