minify_with_uglify.py

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#!/usr/bin/env python

# Copyright 2019 The Chromium Authors. All rights reserved.

# Use of this source code is governed by a BSD-style license that can be

# found in the LICENSE file.

from __future__ import print_function

import os

import sys

import tempfile

_HERE_PATH = os.path.dirname(__file__)

_SRC_PATH = os.path.normpath(os.path.join(_HERE_PATH, '..', '..'))

sys.path.append(os.path.join(_SRC_PATH, 'third_party', 'node'))

import node

import node_modules

def Minify(source):

  # Open two temporary files, so that uglify can read the input from one and

  # write its output to the other.

  with tempfile.NamedTemporaryFile(suffix='.js') as infile, \

       tempfile.NamedTemporaryFile(suffix='.js') as outfile:

    infile.write(source)

    infile.flush();

    node.RunNode([

        node_modules.PathToUglify(), infile.name, '--output', outfile.name])

    result = outfile.read()

    return result

def main():

  orig_stdout = sys.stdout

  result = ''

  try:

    sys.stdout = sys.stderr

    result = Minify(sys.stdin.read())

  finally:

    sys.stdout = orig_stdout

    print(result)

if __name__ == '__main__':

  main()