git-euc-grep.py

#!/usr/bin/python
# vim: syn=python fileencoding=utf-8 ai et ts=4 sts=4 sw=4
import sys, subprocess

args = ['git', 'grep']
argv = sys.argv[1:]
if argv[0] == 'grep':
    argv = argv[1:]
for arg in argv:
    args.append(unicode(arg, 'utf-8').encode('euc-jp'))

p = subprocess.Popen(args,
                     stdout=subprocess.PIPE,
                     stderr=sys.stderr,
                     stdin=sys.stdin)

encodings = ('euc-jp', 'utf-8')

while True:
    line = p.stdout.readline()
    if not line:
        break
    uline = u''
    for encoding in encodings:
        try:
            uline = unicode(line, encoding)
            break
        except UnicodeDecodeError:
            pass
    uline = uline.rstrip()
    if len(uline) > 0:
        print(uline.encode('utf-8'))

p.wait()

git-euc.sh

#!/bin/sh
if [ "x$1" = "xgrep" ]; then
	git-euc-grep "$@"
fi