Python script to search and replace uncomplicated terms recursively in a given directory, always asking for confirmation.

renamer.py

"""
Recursively does a search & replace in the given directory.

Usage: python renamer.py <dir> <search> <replace>
"""
import os
import re
import sys

from fabric.colors import red

def main():
    dir, search, replace = sys.argv[1:4]
    command = 'grep -R -l %s %s' % (search, dir)
    print command
    files = os.popen(command).readlines()
    for file in files:
        search_and_replace(search, replace, file.strip())
    
def search_and_replace(search, replace, file):
    input = open(file)
    lines = input.readlines()
    input.close()
    output = open(file, 'w')
    for line in lines:
        confirmation = line
        for m in re.findall(search, line):
            highlight = red(search)
            confirmation = line.replace(search, highlight, 1)
            if raw_input(confirmation) == '':
                line = line.replace(search, replace, 1)
            confirmation = confirmation.replace(highlight, search, 1)
        output.write(line)
    output.close()


if __name__ == '__main__':
    main()