thumbor optimizer support for guetzli

guetzli.py

#!/usr/bin/python
# -*- coding: utf-8 -*-

# thumbor imaging service
# https://github.com/thumbor/thumbor/wiki

#guetzli compression for thumbor
#https://gist.github.com/honsa/bf972693bc1452d42acc1d87d0ce18e1

# Licensed under the MIT license:
# http://www.opensource.org/licenses/mit-license
# Copyright (c) 2018 globo.com [email protected]

import os
import subprocess

from subprocess import Popen, PIPE

from thumbor.optimizers import BaseOptimizer
from thumbor.utils import logger
from os.path import exists


class Optimizer(BaseOptimizer):

    def should_run(self, image_extension, buffer):
        if image_extension in ['.jpg', '.jpeg']:
            if not exists(self.context.config.GUETZLI_PATH):
                logger.warn(
                    'guetzli optimizer enabled but binary GUETZLI_PATH does not exist')
                return False
            return True
        return False

    def optimize(self, buffer, input_file, output_file):

            command = self.context.config.GUETZLI_PATH + ' --quality 84' + ' --verbose ' + input_file + ' ' + output_file

            os.system(command)