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#!/usr/bin/env python
"""
Generate the contents of the git_sha1.h file.
The output of this script goes to stdout.
"""
import argparse
import os
import os.path
import subprocess
import sys
def get_git_sha1():
"""Try to get the git SHA1 with git rev-parse."""
git_dir = os.path.join(os.path.dirname(sys.argv[0]), '..', '.git')
try:
git_sha1 = subprocess.check_output([
'git',
'--git-dir=' + git_dir,
'rev-parse',
'HEAD',
], stderr=open(os.devnull, 'w')).decode("ascii")
except:
# don't print anything if it fails
git_sha1 = ''
return git_sha1
parser = argparse.ArgumentParser()
parser.add_argument('--output', help='File to write the #define in',
required=True)
args = parser.parse_args()
git_sha1 = os.environ.get('MESA_GIT_SHA1_OVERRIDE', get_git_sha1())[:10]
if git_sha1:
git_sha1_h_in_path = os.path.join(os.path.dirname(sys.argv[0]),
'..', 'src', 'git_sha1.h.in')
with open(git_sha1_h_in_path, 'r') as git_sha1_h_in:
new_sha1 = git_sha1_h_in.read().replace('@VCS_TAG@', git_sha1)
if os.path.isfile(args.output):
with open(args.output, 'r') as git_sha1_h:
if git_sha1_h.read() == new_sha1:
quit()
with open(args.output, 'w') as git_sha1_h:
git_sha1_h.write(new_sha1)
else:
open(args.output, 'w').close()
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