4 Generate the contents of the git_sha1.h file.
5 The output of this script goes to stdout.
17 """Try to get the git SHA1 with git rev-parse."""
18 git_dir
= os
.path
.join(os
.path
.dirname(sys
.argv
[0]), '..', '.git')
20 git_sha1
= subprocess
.check_output([
22 '--git-dir=' + git_dir
,
25 ], stderr
=open(os
.devnull
, 'w')).decode("ascii")
27 # don't print anything if it fails
31 def write_if_different(contents
):
33 Avoid touching the output file if it doesn't need modifications
34 Useful to avoid triggering rebuilds when nothing has changed.
36 if os
.path
.isfile(args
.output
):
37 with
open(args
.output
, 'r') as file:
38 if file.read() == contents
:
40 with
open(args
.output
, 'w') as file:
43 parser
= argparse
.ArgumentParser()
44 parser
.add_argument('--output', help='File to write the #define in',
46 args
= parser
.parse_args()
48 git_sha1
= os
.environ
.get('MESA_GIT_SHA1_OVERRIDE', get_git_sha1())[:10]
50 write_if_different('#define MESA_GIT_SHA1 " (git-' + git_sha1
+ ')"')
52 write_if_different('#define MESA_GIT_SHA1 ""')