forked from mitsuhiko/rstblog
/
builder.py
303 lines (248 loc) · 10.1 KB
/
builder.py
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# -*- coding: utf-8 -*-
"""
rstblog.builder
~~~~~~~~~~~~~~~
The building components.
:copyright: (c) 2010 by Armin Ronacher.
:license: BSD, see LICENSE for more details.
"""
import re
import os
import posixpath
from fnmatch import fnmatch
from docutils.core import publish_parts
from jinja2 import Environment, FileSystemLoader, Markup
from babel import Locale, dates
from werkzeug.routing import Map, Rule
from rstblog.signals import before_file_processed, \
before_template_rendered, before_build_finished, \
before_file_built, after_file_prepaired
from rstblog.modules import find_module
from rstblog.programs import RSTProgram, CopyProgram
OUTPUT_FOLDER = '_build'
builtin_programs = {
'rst': RSTProgram,
'copy': CopyProgram
}
builtin_templates = os.path.join(os.path.dirname(__file__), 'templates')
url_parts_re = re.compile(r'\$(\w+|{[^}]+})')
class Context(object):
"""Per rendering information"""
def __init__(self, builder, config, source_filename):
self.builder = builder
self.config = config
self.title = 'Untitled'
self.summary = None
self.pub_date = None
self.source_filename = source_filename
self.links = []
self.program_name = self.config.get('program')
if self.program_name is None:
self.program_name = self.builder.guess_program(
config, source_filename)
self.program = self.builder.programs[self.program_name](self)
self.destination_filename = self.program.get_desired_filename()
self.program.prepare()
after_file_prepaired.send(self)
@property
def slug(self):
directory, filename = os.path.split(self.source_filename)
basename, ext = os.path.splitext(filename)
if basename == 'index':
return posixpath.join(directory, basename).rstrip('/')
return posixpath.join(directory, basename)
def make_destination_folder(self):
folder = self.destination_folder
if not os.path.isdir(folder):
os.makedirs(folder)
def open_source_file(self, mode='r'):
return open(self.full_source_filename, mode)
def open_destination_file(self, mode='w'):
self.make_destination_folder()
return open(self.full_destination_filename, mode)
@property
def destination_folder(self):
return os.path.dirname(self.full_destination_filename)
@property
def full_destination_filename(self):
return os.path.join(self.builder.project_folder,
self.config.get('output_folder') or OUTPUT_FOLDER,
self.destination_filename)
@property
def full_source_filename(self):
return os.path.join(self.builder.project_folder, self.source_filename)
@property
def needs_build(self):
return True
src = self.full_source_filename
dst = self.full_destination_filename
return not os.path.isfile(dst) or \
os.path.getmtime(dst) < os.path.getmtime(src)
def get_default_template_context(self):
return {
'source_filename': self.source_filename,
'program_name': self.program_name,
'links': self.links,
'ctx': self,
'config': self.config
}
def render_template(self, template_name, context=None):
real_context = self.get_default_template_context()
if context:
real_context.update(context)
return self.builder.render_template(template_name, real_context)
def render_rst(self, contents):
settings = {
'initial_header_level': self.config.get('rst_header_level', 2),
'rstblog_context': self
}
parts = publish_parts(source=contents,
writer_name='html4css1',
settings_overrides=settings)
return {
'title': parts['title'],
'html_title': Markup(parts['html_title']),
'fragment': Markup(parts['fragment'])
}
def render_contents(self):
return self.program.render_contents()
def render_summary(self):
if not self.summary:
return u''
return self.render_rst(self.summary)['fragment']
def add_stylesheet(self, href, type=None, media=None):
if type is None:
type = 'text/css'
self.links.append({
'href': '/' + posixpath.join(self.builder.static_folder, href),
'type': type,
'media': media,
'rel': 'stylesheet'
})
def run(self):
before_file_processed.send(self)
if self.needs_build:
self.build()
def build(self):
before_file_built.send(self)
self.program.run()
class BuildError(ValueError):
pass
class Builder(object):
default_ignores = ('.*', '_*', 'config.yml', 'Makefile', 'README')
default_programs = {
'*.rst': 'rst'
}
default_template_path = '_templates'
default_static_folder = 'static'
def __init__(self, project_folder, config):
self.project_folder = os.path.abspath(project_folder)
self.config = config
self.programs = builtin_programs.copy()
self.modules = []
self.storage = {}
self.url_map = Map()
self.url_adapter = self.url_map.bind('dummy.invalid')
self.register_url('page', '/<path:slug>')
template_path = os.path.join(self.project_folder,
self.config.root_get('template_path') or
self.default_template_path)
self.locale = Locale(self.config.root_get('locale') or 'en')
self.jinja_env = Environment(
loader=FileSystemLoader([template_path, builtin_templates]),
autoescape=self.config.root_get('template_autoescape', True),
extensions=['jinja2.ext.autoescape', 'jinja2.ext.with_'],
)
self.jinja_env.globals.update(
link_to=self.link_to,
format_datetime=self.format_datetime,
format_date=self.format_date,
format_time=self.format_time
)
self.static_folder = self.config.root_get('static_folder') or \
self.default_static_folder
for module in self.config.root_get('active_modules') or []:
mod = find_module(module)
mod.setup(self)
self.modules.append(mod)
@property
def default_output_folder(self):
return os.path.join(self.project_folder,
self.config.root_get('output_folder')
or OUTPUT_FOLDER)
def link_to(self, _key, **values):
return self.url_adapter.build(_key, values)
def get_link_filename(self, _key, **values):
link = self.link_to(_key, **values).lstrip('/')
if not link or link.endswith('/'):
link += 'index.html'
return os.path.join(self.default_output_folder, link)
def open_link_file(self, _key, mode='w', **values):
filename = self.get_link_filename(_key, **values)
folder = os.path.dirname(filename)
if not os.path.isdir(folder):
os.makedirs(folder)
return open(filename, mode)
def register_url(self, key, rule=None, config_key=None, **extra):
if config_key is not None:
rule = self.config.root_get(config_key)
self.url_map.add(Rule(rule, endpoint=key, **extra))
def open_static_file(self, filename, mode='w'):
full_filename = os.path.join(self.default_output_folder,
self.static_folder, filename)
folder = os.path.dirname(full_filename)
if not os.path.isdir(folder):
os.makedirs(folder)
return open(full_filename, mode)
def get_storage(self, module):
return self.storage.setdefault(module, {})
def filter_files(self, files, config):
patterns = config.merged_get('ignore_files')
if patterns is None:
patterns = self.default_ignores
result = []
for filename in files:
for pattern in patterns:
if fnmatch(filename, pattern):
break
else:
result.append(filename)
return result
def guess_program(self, config, filename):
mapping = config.list_entries('programs') or self.default_programs
for pattern, program_name in mapping.iteritems():
if fnmatch(filename, pattern):
return program_name
return 'copy'
def render_template(self, template_name, context=None):
if context is None:
context = {}
context['builder'] = self
context.setdefault('config', self.config)
tmpl = self.jinja_env.get_template(template_name)
before_template_rendered.send(tmpl, context=context)
return tmpl.render(context)
def format_datetime(self, datetime=None, format='medium'):
return dates.format_datetime(datetime, format, locale=self.locale)
def format_time(self, time=None, format='medium'):
return dates.format_time(time, format, locale=self.locale)
def format_date(self, date=None, format='medium'):
return dates.format_date(date, format, locale=self.locale)
def run(self):
contexts = []
last_config = self.config
cutoff = len(self.project_folder) + 1
for dirpath, dirnames, filenames in os.walk(self.project_folder):
local_config = last_config
local_config_filename = os.path.join(dirpath, 'config.yml')
if os.path.isfile(local_config_filename):
with open(local_config_filename) as f:
local_config = last_config.add_from_file(f)
dirnames[:] = self.filter_files(dirnames, local_config)
filenames = self.filter_files(filenames, local_config)
for filename in filenames:
contexts.append(Context(self, local_config,
os.path.join(dirpath[cutoff:], filename)))
for context in contexts:
context.run()
before_build_finished.send(self)