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# -*- coding: utf-8 -*-
# Copyright © 2012-2016 Roberto Alsina and others.
# 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.
"""Bundle assets using WebAssets."""
from __future__ import unicode_literals
import os
try:
import webassets
except ImportError:
webassets = None # NOQA
from nikola.plugin_categories import LateTask
from nikola import utils
class BuildBundles(LateTask):
"""Bundle assets using WebAssets."""
name = "create_bundles"
def set_site(self, site):
"""Set Nikola site."""
self.logger = utils.get_logger('bundles', utils.STDERR_HANDLER)
if webassets is None and site.config['USE_BUNDLES']:
utils.req_missing(['webassets'], 'USE_BUNDLES', optional=True)
self.logger.warn('Setting USE_BUNDLES to False.')
site.config['USE_BUNDLES'] = False
site._GLOBAL_CONTEXT['use_bundles'] = False
super(BuildBundles, self).set_site(site)
def gen_tasks(self):
"""Bundle assets using WebAssets."""
kw = {
'filters': self.site.config['FILTERS'],
'output_folder': self.site.config['OUTPUT_FOLDER'],
'cache_folder': self.site.config['CACHE_FOLDER'],
'theme_bundles': get_theme_bundles(self.site.THEMES),
'themes': self.site.THEMES,
'files_folders': self.site.config['FILES_FOLDERS'],
'code_color_scheme': self.site.config['CODE_COLOR_SCHEME'],
}
def build_bundle(output, inputs):
out_dir = os.path.join(kw['output_folder'],
os.path.dirname(output))
inputs = [os.path.relpath(i, out_dir) for i in inputs if os.path.isfile(i)]
cache_dir = os.path.join(kw['cache_folder'], 'webassets')
utils.makedirs(cache_dir)
env = webassets.Environment(out_dir, os.path.dirname(output),
cache=cache_dir)
if inputs:
bundle = webassets.Bundle(*inputs, output=os.path.basename(output))
env.register(output, bundle)
# This generates the file
try:
env[output].urls()
except Exception as e:
self.logger.error("Failed to build bundles.")
self.logger.exception(e)
self.logger.notice("Try running ``nikola clean`` and building again.")
else:
with open(os.path.join(out_dir, os.path.basename(output)), 'wb+'):
pass # Create empty file
yield self.group_task()
if (webassets is not None and self.site.config['USE_BUNDLES'] is not
False):
for name, _files in kw['theme_bundles'].items():
output_path = os.path.join(kw['output_folder'], name)
dname = os.path.dirname(name)
files = []
for fname in _files:
# paths are relative to dirname
files.append(os.path.join(dname, fname))
file_dep = [os.path.join(kw['output_folder'], fname)
for fname in files if
utils.get_asset_path(
fname,
self.site.THEMES,
self.site.config['FILES_FOLDERS'],
output_dir=kw['output_folder']) or fname == os.path.join('assets', 'css', 'code.css')]
# code.css will be generated by us if it does not exist in
# FILES_FOLDERS or theme assets. It is guaranteed that the
# generation will happen before this task.
task = {
'file_dep': list(file_dep),
'task_dep': ['copy_assets', 'copy_files'],
'basename': str(self.name),
'name': str(output_path),
'actions': [(build_bundle, (name, file_dep))],
'targets': [output_path],
'uptodate': [
utils.config_changed({
1: kw,
2: file_dep
}, 'nikola.plugins.task.bundles')],
'clean': True,
}
yield utils.apply_filters(task, kw['filters'])
def get_theme_bundles(themes):
"""Given a theme chain, return the bundle definitions."""
bundles = {}
for theme_name in themes:
bundles_path = os.path.join(
utils.get_theme_path(theme_name), 'bundles')
if os.path.isfile(bundles_path):
with open(bundles_path) as fd:
for line in fd:
try:
name, files = line.split('=')
files = [f.strip() for f in files.split(',')]
bundles[name.strip().replace('/', os.sep)] = files
except ValueError:
# for empty lines
pass
break
return bundles
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