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#!/usr/bin/env python2
""" Git Versioning Script
Will transform stdin to expand some keywords with git version/author/date information.
Specify --clean to remove this information before commit.
Setup:
1. Copy versioning.py into your git repository
2. Run:
git config filter.versioning.smudge 'python versioning.py'
git config filter.versioning.clean 'python versioning.py --clean'
echo 'version.py filter=versioning' >> .gitattributes
git add versioning.py
3. add a version.py file with this contents:
__version__ = ""
"""
import sys
import subprocess
import re
def main():
clean = False
if len(sys.argv) > 1:
if sys.argv[1] == '--clean':
clean = True
# initialise empty here. Otherwise: forkbomb through the git calls.
subst_list = {
"version": "",
}
for line in sys.stdin:
if not clean:
subst_list = {
# '--dirty' could be added to the following, too, but is not supported everywhere
"version": subprocess.check_output(['git', 'describe', '--always']),
}
for k, v in subst_list.iteritems():
v = re.sub(r'[\n\r\t"\']', "", v)
rexp = "__%s__\s*=[\s'\"]+" % k
line = re.sub(rexp, "__%s__ = \"%s\"\n" % (k, v), line)
sys.stdout.write(line)
else:
for k in subst_list:
rexp = "__%s__\s*=.*" % k
line = re.sub(rexp, "__%s__ = \"\"" % k, line)
sys.stdout.write(line)
if __name__ == "__main__":
main()
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