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# -*- coding: utf-8 -*-
# Copyright © 2012-2014 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.
"""Mako template handlers"""
from __future__ import unicode_literals, print_function, absolute_import
import os
import shutil
import sys
import tempfile
from mako import util, lexer
from mako.lookup import TemplateLookup
from mako.template import Template
from markupsafe import Markup # It's ok, Mako requires it
from nikola.plugin_categories import TemplateSystem
from nikola.utils import makedirs, get_logger, STDERR_HANDLER
LOGGER = get_logger('mako', STDERR_HANDLER)
class MakoTemplates(TemplateSystem):
"""Wrapper for Mako templates."""
name = "mako"
lookup = None
cache = {}
filters = {}
directories = []
cache_dir = None
def get_deps(self, filename):
text = util.read_file(filename)
lex = lexer.Lexer(text=text, filename=filename)
lex.parse()
deps = []
for n in lex.template.nodes:
keyword = getattr(n, 'keyword', None)
if keyword in ["inherit", "namespace"]:
deps.append(n.attributes['file'])
# TODO: include tags are not handled
return deps
def set_directories(self, directories, cache_folder):
"""Set directories and create a template lookup."""
cache_dir = os.path.join(cache_folder, '.mako.tmp')
# Workaround for a Mako bug, Issue #825
if sys.version_info[0] == 2:
try:
os.path.abspath(cache_dir).decode('ascii')
except UnicodeEncodeError:
cache_dir = tempfile.mkdtemp()
LOGGER.warning('Because of a Mako bug, setting cache_dir to {0}'.format(cache_dir))
if os.path.exists(cache_dir):
shutil.rmtree(cache_dir)
self.directories = directories
self.cache_dir = cache_dir
self.create_lookup()
def inject_directory(self, directory):
"""if it's not there, add the directory to the lookup with lowest priority, and
recreate the lookup."""
if directory not in self.directories:
self.directories.append(directory)
self.create_lookup()
def create_lookup(self):
"""Create a template lookup object."""
self.lookup = TemplateLookup(
directories=self.directories,
module_directory=self.cache_dir,
output_encoding='utf-8')
def set_site(self, site):
"""Sets the site."""
self.site = site
self.filters.update(self.site.config['TEMPLATE_FILTERS'])
def render_template(self, template_name, output_name, context):
"""Render the template into output_name using context."""
context['striphtml'] = striphtml
template = self.lookup.get_template(template_name)
data = template.render_unicode(**context)
if output_name is not None:
makedirs(os.path.dirname(output_name))
with open(output_name, 'w+') as output:
output.write(data)
return data
def render_template_to_string(self, template, context):
""" Render template to a string using context. """
context = context.update(self.filters)
return Template(template).render(**context)
def template_deps(self, template_name):
"""Returns filenames which are dependencies for a template."""
# We can cache here because dependencies should
# not change between runs
if self.cache.get(template_name, None) is None:
template = self.lookup.get_template(template_name)
dep_filenames = self.get_deps(template.filename)
deps = [template.filename]
for fname in dep_filenames:
deps += self.template_deps(fname)
self.cache[template_name] = tuple(deps)
return list(self.cache[template_name])
def striphtml(text):
return Markup(text).striptags()
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