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62 lines
1.8 KiB
Python
62 lines
1.8 KiB
Python
# -*- coding: utf-8 -*-
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"""
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Optimized images (jpg and png)
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Assumes that jpegtran and optipng are isntalled on path.
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http://jpegclub.org/jpegtran/
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http://optipng.sourceforge.net/
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Copyright (c) 2012 Irfan Ahmad (http://i.com.pk)
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"""
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import logging
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import os
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from subprocess import call
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from pelican import signals
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logger = logging.getLogger(__name__)
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# Display command output on DEBUG and TRACE
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SHOW_OUTPUT = logger.getEffectiveLevel() <= logging.DEBUG
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# A list of file types with their respective commands
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COMMANDS = {
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# '.ext': ('command {flags} {filename', 'silent_flag', 'verbose_flag')
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'.svg': ('svgo {flags} --input="{filename}" --output="{filename}"', '--quiet', ''),
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'.jpg': ('jpegtran {flags} -copy none -optimize -outfile "{filename}" "{filename}"', '', '-v'),
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'.png': ('optipng {flags} "{filename}"', '--quiet', ''),
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}
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def optimize_images(pelican):
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"""
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Optimized jpg and png images
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:param pelican: The Pelican instance
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"""
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for dirpath, _, filenames in os.walk(pelican.settings['OUTPUT_PATH']):
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for name in filenames:
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if os.path.splitext(name)[1] in COMMANDS.keys():
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optimize(dirpath, name)
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def optimize(dirpath, filename):
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"""
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Check if the name is a type of file that should be optimized.
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And optimizes it if required.
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:param dirpath: Path of the file to be optimzed
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:param name: A file name to be optimized
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"""
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filepath = os.path.join(dirpath, filename)
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logger.info('optimizing %s', filepath)
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ext = os.path.splitext(filename)[1]
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command, silent, verbose = COMMANDS[ext]
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flags = verbose if SHOW_OUTPUT else silent
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command = command.format(filename=filepath, flags=flags)
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call(command, shell=True)
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def register():
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signals.finalized.connect(optimize_images)
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