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#!/usr/bin/env python
# This script replaces prefixes of files, and symbols in that file.
# Useful for creating different versions of the codebase that don't
# conflict at compile time.
#
# example:
# $ ./scripts/prefix.py lfs2
import os
import os.path
import re
import glob
import itertools
import tempfile
import shutil
import subprocess
DEFAULT_PREFIX = "lfs"
def subn(from_prefix, to_prefix, name):
name, count1 = re.subn('\\b'+from_prefix, to_prefix, name)
name, count2 = re.subn('\\b'+from_prefix.upper(), to_prefix.upper(), name)
name, count3 = re.subn('\\B-D'+from_prefix.upper(),
'-D'+to_prefix.upper(), name)
return name, count1+count2+count3
def main(from_prefix, to_prefix=None, files=None):
if not to_prefix:
from_prefix, to_prefix = DEFAULT_PREFIX, from_prefix
if not files:
files = subprocess.check_output([
'git', 'ls-tree', '-r', '--name-only', 'HEAD']).split()
for oldname in files:
# Rename any matching file names
newname, namecount = subn(from_prefix, to_prefix, oldname)
if namecount:
subprocess.check_call(['git', 'mv', oldname, newname])
# Rename any prefixes in file
count = 0
with open(newname+'~', 'w') as tempf:
with open(newname) as newf:
for line in newf:
line, n = subn(from_prefix, to_prefix, line)
count += n
tempf.write(line)
shutil.copystat(newname, newname+'~')
os.rename(newname+'~', newname)
subprocess.check_call(['git', 'add', newname])
# Summary
print '%s: %d replacements' % (
'%s -> %s' % (oldname, newname) if namecount else oldname,
count)
if __name__ == "__main__":
import sys
sys.exit(main(*sys.argv[1:]))
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