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import os
import jinja2
import logging
from mkdocs import utils
from mkdocs.utils import filters
from mkdocs.config.base import ValidationError
log = logging.getLogger(__name__)
log.addFilter(utils.warning_filter)
class Theme:
"""
A Theme object.
Keywords:
name: The name of the theme as defined by its entrypoint.
custom_dir: User defined directory for custom templates.
static_templates: A list of templates to render as static pages.
All other keywords are passed as-is and made available as a key/value mapping.
"""
def __init__(self, name=None, **user_config):
self.name = name
self._vars = {}
# MkDocs provided static templates are always included
package_dir = os.path.abspath(os.path.dirname(__file__))
mkdocs_templates = os.path.join(package_dir, 'templates')
self.static_templates = set(os.listdir(mkdocs_templates))
# Build self.dirs from various sources in order of precedence
self.dirs = []
if 'custom_dir' in user_config:
self.dirs.append(user_config.pop('custom_dir'))
if self.name:
self._load_theme_config(name)
# Include templates provided directly by MkDocs (outside any theme)
self.dirs.append(mkdocs_templates)
# Handle remaining user configs. Override theme configs (if set)
self.static_templates.update(user_config.pop('static_templates', []))
self._vars.update(user_config)
def __repr__(self):
return "{}(name='{}', dirs={}, static_templates={}, {})".format(
self.__class__.__name__, self.name, self.dirs, list(self.static_templates),
', '.join('{}={}'.format(k, repr(v)) for k, v in self._vars.items())
)
def __getitem__(self, key):
return self._vars[key]
def __setitem__(self, key, value):
self._vars[key] = value
def __contains__(self, item):
return item in self._vars
def __iter__(self):
return iter(self._vars)
def _load_theme_config(self, name):
""" Recursively load theme and any parent themes. """
theme_dir = utils.get_theme_dir(name)
self.dirs.append(theme_dir)
try:
file_path = os.path.join(theme_dir, 'mkdocs_theme.yml')
with open(file_path, 'rb') as f:
theme_config = utils.yaml_load(f)
if theme_config is None:
theme_config = {}
except OSError as e:
log.debug(e)
raise ValidationError(
"The theme '{}' does not appear to have a configuration file. "
"Please upgrade to a current version of the theme.".format(name)
)
log.debug("Loaded theme configuration for '%s' from '%s': %s", name, file_path, theme_config)
parent_theme = theme_config.pop('extends', None)
if parent_theme:
themes = utils.get_theme_names()
if parent_theme not in themes:
raise ValidationError(
"The theme '{}' inherits from '{}', which does not appear to be installed. "
"The available installed themes are: {}".format(name, parent_theme, ', '.join(themes))
)
self._load_theme_config(parent_theme)
self.static_templates.update(theme_config.pop('static_templates', []))
self._vars.update(theme_config)
def get_env(self):
""" Return a Jinja environment for the theme. """
loader = jinja2.FileSystemLoader(self.dirs)
env = jinja2.Environment(loader=loader)
env.filters['tojson'] = filters.tojson
env.filters['url'] = filters.url_filter
return env
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