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# Copyright (c) 2012 Roberto Alsina y otros.
# 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"""
import os
import shutil
from mako import util, lexer
from mako.lookup import TemplateLookup
from nikola.plugin_categories import TemplateSystem
class MakoTemplates(TemplateSystem):
"""Wrapper for Mako templates."""
name = "mako"
lookup = None
cache = {}
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):
"""Createa template lookup."""
cache_dir = os.path.join(cache_folder, '.mako.tmp')
if os.path.exists(cache_dir):
shutil.rmtree(cache_dir)
self.lookup = TemplateLookup(
directories=directories,
module_directory=cache_dir,
output_encoding='utf-8')
def render_template(self, template_name, output_name, context):
"""Render the template into output_name using context."""
template = self.lookup.get_template(template_name)
data = template.render_unicode(**context)
if output_name is not None:
try:
os.makedirs(os.path.dirname(output_name))
except:
pass
with open(output_name, 'w+') as output:
output.write(data)
return data
def template_deps(self, template_name):
"""Returns filenames which are dependencies for a template."""
# We can cache here because depedencies 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])
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