Asset url timestamping for phpbb

timestamp-asset-urls.py

#!/usr/bin/env python

# Current timestamp can be obtained by, e.g.:
#
# perl -e 'print time'

import os, os.path, re, sys

if len(sys.argv) != 2:
    print >>sys.stderr, "Usage: timestamp-asset-urls timestamp"
    exit(2)

timestamp = sys.argv[1]

root = None
base = os.path.join(os.path.dirname(__file__), '..')
for dir in ['webroot/forums']:
    candidate_root = os.path.join(base, dir)
    if os.path.exists(os.path.join(candidate_root, 'config.php')):
        root = candidate_root
        break

if not root:
    print >>sys.stderr, "Unable to locate root"
    exit(3)

css_regexp = re.compile(r'url\( *((?:"|\')?)(.*?\.(png|gif|jpe?g))(\?\d+)?\1\)')
generic_regexp = re.compile(r'\b(\w+\.(?:png|gif|jpe?g|ico))(\?\d+)?\b')
js_css_regexp = re.compile(r'\b(\w+\.(?:css|js))(\?\d+)?\b')
css_functions_regexp = re.compile(r'(\.css)(\?\d+)?\b')
generic_file_regexp = re.compile(r'.*\.(php|html|js)\b$')

def read(path):
    with open(path, 'r') as f:
        return f.read()

def write(path, content):
    with open(path, 'w') as f:
        f.write(content)

def fix_css(path):
    content = read(path)
    new_content = css_regexp.sub(r'url(\2?%s)' % timestamp, content)
    if content != new_content:
        write(path, new_content)

def fix_generic(path):
    content = read(path)
    new_content = generic_regexp.sub(r'\1?%s' % timestamp, content)
    if content != new_content:
        write(path, new_content)

def fix_js_css(path):
    content = read(path)
    new_content = js_css_regexp.sub(r'\1?%s' % timestamp, content)
    if content != new_content:
        write(path, new_content)

def fix_functions(path):
    content = read(path)
    new_content = css_functions_regexp.sub(r'\1?%s' % timestamp, content)
    if content != new_content:
        write(path, new_content)

for parent, dirs, files in os.walk(root):
    if '.svn' in dirs:
        dirs.remove('.svn')
    for file in files:
        if file.endswith('.css'):
            path = os.path.join(parent, file)
            fix_css(path)
        elif generic_file_regexp.match(file):
            path = os.path.join(parent, file)
            fix_generic(path)

template_paths = ('adm/style', 'styles')
for template_path in template_paths:
    for parent, dirs, files in os.walk(os.path.join(root, template_path)):
        if '.svn' in dirs:
            dirs.remove('.svn')
        for file in files:
            if file.endswith('.html'):
                path = os.path.join(parent, file)
                fix_js_css(path)

fix_functions(os.path.join(root, 'includes/functions.php'))

# Copyright (c) 2010 Oleg Pudeyev
#
# Permission is hereby granted, free of charge, to any person obtaining a copy
# of this software and associated documentation files (the "Software"), to deal
# in the Software without restriction, including without limitation the rights
# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
# copies of the Software, and to permit persons to whom the Software is
# furnished to do so, subject to the following conditions:
#
# The above copyright notice and this permission notice shall be included in
# all copies or substantial portions of the Software.
#
# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
# THE SOFTWARE.