[Mesa-dev] [PATCH] git_sha1_gen: accept MESA_GIT_SHA1_OVERRIDE env var
Brian Paul
brianp at vmware.com
Tue Oct 10 02:26:22 UTC 2017
If one uses a parent build script to download/build Mesa we may not
have a full git repository (maybe a tar archive) so the 'git rev-parse'
command will fail.
This updates the script to look for a MESA_GIT_SHA1_OVERRIDE env var.
If it's set, use that sha1 instead of using git rev-parse. With this
change we can put a git hash in the GL_VERSION string even when we
don't have a git repo.
v2: incorporate Dylan's suggestions to simplify the code
---
bin/git_sha1_gen.py | 39 ++++++++++++++++++++++++++-------------
1 file changed, 26 insertions(+), 13 deletions(-)
diff --git a/bin/git_sha1_gen.py b/bin/git_sha1_gen.py
index 97981fb..87e06a8 100755
--- a/bin/git_sha1_gen.py
+++ b/bin/git_sha1_gen.py
@@ -1,20 +1,33 @@
#!/usr/bin/env python
+"""
+Generate the contents of the git_sha1.h file.
+The output of this script goes to stdout.
+"""
+
+
+import os
import os.path
import subprocess
import sys
-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',
- '--short=10',
- 'HEAD',
- ], stderr=open(os.devnull, 'w')).decode("ascii")
-except:
- # don't print anything if it fails
- pass
-else:
+
+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
+
+
+git_sha1 = os.environ.get('MESA_GIT_SHA1_OVERRIDE', get_git_sha1())[:10]
+if git_sha1:
sys.stdout.write('#define MESA_GIT_SHA1 "git-%s"\n' % git_sha1.rstrip())
--
1.9.1
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