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