rn.sh -- git mv to rename files by a source pattern and an expected output pattern

rn.sh

#!/bin/bash
# based on:
# https://stackoverflow.com/questions/9984722/git-rename-many-files-and-folders

OLD_PATTERN=$1
NEW_PATTERN=$2

for file in `git ls-files | grep "$OLD_PATTERN"`; do git mv -k $file `echo $file | sed -e "s|$OLD_PATTERN|$NEW_PATTERN|g"`; done