KonstantinSeurer
/
mesa
1
0
Fork 0
Code Issues Pull Requests Packages Projects Releases Wiki Activity

bin: split `write_if_different()` out 

Signed-off-by: Eric Engestrom <eric.engestrom@intel.com>
Reviewed-by: Dylan Baker <dylan@pnwbakers.com>
This commit is contained in:
Eric Engestrom 2018-08-14 18:02:04 +01:00
parent c2e00f9eee
commit c5dd02287f
1 changed files with 14 additions and 7 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

21
bin/git_sha1_gen.py
View File

@ -28,6 +28,18 @@ def get_git_sha1():
git_sha1 = ''
return git_sha1
def write_if_different(contents):
"""
Avoid touching the output file if it doesn't need modifications
Useful to avoid triggering rebuilds when nothing has changed.
"""
if os.path.isfile(args.output):
with open(args.output, 'r') as file:
if file.read() == contents:
return
with open(args.output, 'w') as file:
file.write(contents)
parser = argparse.ArgumentParser()
parser.add_argument('--output', help='File to write the #define in',
required=True)
@ -39,11 +51,6 @@ if git_sha1:
'..', '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)
write_if_different(new_sha1)
else:
open(args.output, 'w').close()
write_if_different('')