9d4369ebc06bffe3188608686f1275bc6ecc6f47
2 Generate the contents of the git_sha1.h file.
14 """Try to get the git SHA1 with git rev-parse."""
15 git_dir
= os
.path
.join(os
.path
.dirname(sys
.argv
[0]), '..', '.git')
17 git_sha1
= subprocess
.check_output([
19 '--git-dir=' + git_dir
,
22 ], stderr
=open(os
.devnull
, 'w')).decode("ascii")
24 # don't print anything if it fails
28 def write_if_different(contents
):
30 Avoid touching the output file if it doesn't need modifications
31 Useful to avoid triggering rebuilds when nothing has changed.
33 if os
.path
.isfile(args
.output
):
34 with
open(args
.output
, 'r') as file:
35 if file.read() == contents
:
37 with
open(args
.output
, 'w') as file:
40 parser
= argparse
.ArgumentParser()
41 parser
.add_argument('--output', help='File to write the #define in',
43 args
= parser
.parse_args()
45 git_sha1
= os
.environ
.get('MESA_GIT_SHA1_OVERRIDE', get_git_sha1())[:10]
47 write_if_different('#define MESA_GIT_SHA1 " (git-' + git_sha1
+ ')"')
49 write_if_different('#define MESA_GIT_SHA1 ""')