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#!/usr/bin/python3
# Copyright (C) 2013, 2015, 2016 Apple Inc. All rights reserved.
#
# Redistribution and use in source and binary forms, with or without
# modification, are permitted provided that the following conditions
# are met:
# 1. Redistributions of source code must retain the above copyright
# notice, this list of conditions and the following disclaimer.
# 2. Redistributions in binary form must reproduce the above copyright
# notice, this list of conditions and the following disclaimer in the
# documentation and/or other materials provided with the distribution.
#
# THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
# THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
# PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
# BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
# THE POSSIBILITY OF SUCH DAMAGE.
import os
import re
import subprocess
import sys
import xml.dom.minidom
def main(argv):
tools_dir = os.path.dirname(__file__)
public_v3_dir = os.path.abspath(os.path.join(tools_dir, '..', 'public', 'v3'))
bundled_script = ''
index_html = xml.dom.minidom.parse(os.path.join(public_v3_dir, 'index.html'))
for template in index_html.getElementsByTagName('template'):
if template.getAttribute('id') != 'unbundled-scripts':
continue
unbundled_scripts = template.getElementsByTagName('script')
for script in unbundled_scripts:
src = script.getAttribute('src')
with open(os.path.join(public_v3_dir, src)) as script_file:
script_content = script_file.read()
script_content = re.sub(r'([\"\'])use strict\1;', '', script_content)
script_content = re.sub(r'(?P<prefix>\n\s*static\s+(?P<type>\w+)Template\(\)\s*{[^`]*`)(?P<content>[^`]*)(?P<suffix>`;?\s*})',
compress_template, script_content, re.MULTILINE)
bundled_script += script_content
jsmin = subprocess.Popen(['python3', os.path.join(tools_dir, 'jsmin.py')], stdin=subprocess.PIPE, stdout=subprocess.PIPE)
minified_script = jsmin.communicate(input=bundled_script.encode())[0]
new_size = float(len(minified_script))
old_size = float(len(bundled_script))
print('%d -> %d (%.1f%%)' % (old_size, new_size, new_size / old_size * 100))
with open(os.path.join(public_v3_dir, 'bundled-scripts.js'), 'w') as bundled_file:
bundled_file.write(minified_script.decode())
def compress_template(match):
prefix = match.group('prefix')
content = match.group('content')
suffix = match.group('suffix')
if match.group('type') == 'css':
content = cssminify(content)
else:
content = re.sub(r'\s+', ' ', content)
return prefix + content + suffix
def cssminify(css):
rules = (
(r"\/\*.*?\*\/", ""), # delete comments
(r"\n", ""), # delete new lines
(r"\s+", " "), # change multiple spaces to one space
(r"\s?([;{},~>!])\s?", r"\1"), # delete space where it is not needed
(r":\s", ":"), # delete spaces after colons, but not before. E.g. do not break selectors "a :focus", "b :matches(...)", "c :not(...)" where the leading space is significant
(r"\s?([-+])(?:\s(?![0-9(])(?!var))", r"\1"), # delete whitespace around + and - when not followed by a number, paren, or var(). E.g. strip for selector "a + b" but not "calc(a + b)" which requires spaces.
(r";}", "}") # change ';}' to '}' because the semicolon is not needed
)
css = css.replace("\r\n", "\n")
for rule in rules:
css = re.compile(rule[0], re.MULTILINE | re.UNICODE | re.DOTALL).sub(rule[1], css)
return css
if __name__ == "__main__":
main(sys.argv)
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