Remove unused images from Xcode project

remove_unused_images.py

#!/usr/bin/env python
# Copyright (c) 2014 Quanlong. All rights reserved.
#
# \author: Quanlong <quanlong.he@gmail.com>

import logging
import subprocess
import re
import optparse
import sys
import os
from progress.bar import Bar

def FindImages():
    pattern = '.*'
    image_globs = ['*.png', '*.jpg']

    out, err = subprocess.Popen(
        ['git', 'grep', '--name-only', '-E', pattern, '--'] + image_globs,
        stdout=subprocess.PIPE,
        shell=False).communicate()

    return out.splitlines()

def GetUsages(image, file_globs):
    # Get image name ref in code, remove image extension and @2x.
    refer = re.sub(r'(?i)(@2x)?\.(jpg|png)$', '', os.path.basename(image))

    # The refer must in quote, like imageNamed:@"bla.png"
    refer = '@"' + refer

    out, err = subprocess.Popen(
        ['git', 'grep', '-H', '-n', '-E', refer, '--'] + file_globs,
        stdout=subprocess.PIPE,
        shell=False).communicate()

    logging.info('==> Processing %s' % refer)
    logging.info(out)
    return len(out.splitlines())

def RemoveImage(image):
    out, err = subprocess.Popen(
        ['git', 'rm', image],
        stdout=subprocess.PIPE,
        shell=False).communicate()

def main():
    parser = optparse.OptionParser(usage=' %prog [-p <project_path>] [-l <log_file>] [-t template]')
    parser.add_option('-p',
                      type='string',
                      action='store',
                      dest='project_path',
                      default='.',
                      metavar='<project_path>',
                      help='Project path')
    parser.add_option('-l',
                      type='string',
                      action='store',
                      dest='log_file',
                      default='',
                      help='Log file path')
    parser.add_option('-t',
                      type='string',
                      action='store',
                      dest='template',
                      default= """\
/* %(description)s */
"%(key)s" = "%(localized_value)s";

""",
                      metavar='<template>',
                      help='Template string')

    opts, args = parser.parse_args()

    if opts.log_file:
        logging.basicConfig(filename=opts.log_file, filemode='w', level=logging.DEBUG)

    images = FindImages()
    removed = 0

    bar = Bar('Processing', max=len(images))
    for image in images:
        bar.next()

        nusages = GetUsages(image,
            ['*.storyboard', '*.xib', '*.mm', '*.m', '*.cc', '*.h'])
        if nusages == 0:
            RemoveImage(image)
            removed += 1

    bar.finish()
    print 'Removed %d images' % removed

if __name__ == '__main__':
      sys.exit(main())