forked from github/pelican
695 lines
23 KiB
Python
695 lines
23 KiB
Python
# -*- coding: utf-8 -*-
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from __future__ import unicode_literals, print_function
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import six
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import codecs
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import errno
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import fnmatch
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import locale
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import logging
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import os
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import pytz
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import re
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import shutil
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import sys
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import traceback
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import pickle
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import datetime
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from collections import Hashable
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from contextlib import contextmanager
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import dateutil.parser
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from functools import partial
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from itertools import groupby
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from jinja2 import Markup
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from operator import attrgetter
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from posixpath import join as posix_join
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logger = logging.getLogger(__name__)
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def strftime(date, date_format):
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'''
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Replacement for built-in strftime
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This is necessary because of the way Py2 handles date format strings.
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Specifically, Py2 strftime takes a bytestring. In the case of text output
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(e.g. %b, %a, etc), the output is encoded with an encoding defined by
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locale.LC_TIME. Things get messy if the formatting string has chars that
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are not valid in LC_TIME defined encoding.
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This works by 'grabbing' possible format strings (those starting with %),
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formatting them with the date, (if necessary) decoding the output and
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replacing formatted output back.
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'''
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c89_directives = 'aAbBcdfHIjmMpSUwWxXyYzZ%'
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strip_zeros = lambda x: x.lstrip('0') or '0'
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# grab candidate format options
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format_options = '%[-]?.'
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candidates = re.findall(format_options, date_format)
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# replace candidates with placeholders for later % formatting
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template = re.sub(format_options, '%s', date_format)
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# we need to convert formatted dates back to unicode in Py2
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# LC_TIME determines the encoding for built-in strftime outputs
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lang_code, enc = locale.getlocale(locale.LC_TIME)
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formatted_candidates = []
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for candidate in candidates:
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# test for valid C89 directives only
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if candidate[-1] in c89_directives:
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# check for '-' prefix
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if len(candidate) == 3:
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# '-' prefix
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candidate = '%{}'.format(candidate[-1])
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conversion = strip_zeros
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else:
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conversion = None
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# format date
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if isinstance(date, SafeDatetime):
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formatted = date.strftime(candidate, safe=False)
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else:
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formatted = date.strftime(candidate)
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# convert Py2 result to unicode
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if not six.PY3 and enc is not None:
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formatted = formatted.decode(enc)
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# strip zeros if '-' prefix is used
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if conversion:
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formatted = conversion(formatted)
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else:
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formatted = candidate
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formatted_candidates.append(formatted)
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# put formatted candidates back and return
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return template % tuple(formatted_candidates)
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class SafeDatetime(datetime.datetime):
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'''Subclass of datetime that works with utf-8 format strings on PY2'''
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def strftime(self, fmt, safe=True):
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'''Uses our custom strftime if supposed to be *safe*'''
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if safe:
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return strftime(self, fmt)
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else:
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return super(SafeDatetime, self).strftime(fmt)
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class DateFormatter(object):
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'''A date formatter object used as a jinja filter
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Uses the `strftime` implementation and makes sure jinja uses the locale
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defined in LOCALE setting
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'''
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def __init__(self):
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self.locale = locale.setlocale(locale.LC_TIME)
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def __call__(self, date, date_format):
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old_lc_time = locale.setlocale(locale.LC_TIME)
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old_lc_ctype = locale.setlocale(locale.LC_CTYPE)
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locale.setlocale(locale.LC_TIME, self.locale)
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# on OSX, encoding from LC_CTYPE determines the unicode output in PY3
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# make sure it's same as LC_TIME
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locale.setlocale(locale.LC_CTYPE, self.locale)
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formatted = strftime(date, date_format)
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locale.setlocale(locale.LC_TIME, old_lc_time)
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locale.setlocale(locale.LC_CTYPE, old_lc_ctype)
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return formatted
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def python_2_unicode_compatible(klass):
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"""
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A decorator that defines __unicode__ and __str__ methods under Python 2.
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Under Python 3 it does nothing.
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To support Python 2 and 3 with a single code base, define a __str__ method
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returning text and apply this decorator to the class.
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From django.utils.encoding.
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"""
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if not six.PY3:
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klass.__unicode__ = klass.__str__
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klass.__str__ = lambda self: self.__unicode__().encode('utf-8')
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return klass
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class memoized(object):
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"""Function decorator to cache return values.
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If called later with the same arguments, the cached value is returned
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(not reevaluated).
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"""
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def __init__(self, func):
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self.func = func
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self.cache = {}
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def __call__(self, *args):
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if not isinstance(args, Hashable):
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# uncacheable. a list, for instance.
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# better to not cache than blow up.
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return self.func(*args)
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if args in self.cache:
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return self.cache[args]
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else:
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value = self.func(*args)
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self.cache[args] = value
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return value
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def __repr__(self):
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return self.func.__doc__
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def __get__(self, obj, objtype):
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'''Support instance methods.'''
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return partial(self.__call__, obj)
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def deprecated_attribute(old, new, since=None, remove=None, doc=None):
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"""Attribute deprecation decorator for gentle upgrades
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For example:
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class MyClass (object):
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@deprecated_attribute(
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old='abc', new='xyz', since=(3, 2, 0), remove=(4, 1, 3))
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def abc(): return None
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def __init__(self):
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xyz = 5
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Note that the decorator needs a dummy method to attach to, but the
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content of the dummy method is ignored.
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"""
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def _warn():
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version = '.'.join(six.text_type(x) for x in since)
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message = ['{} has been deprecated since {}'.format(old, version)]
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if remove:
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version = '.'.join(six.text_type(x) for x in remove)
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message.append(
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' and will be removed by version {}'.format(version))
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message.append('. Use {} instead.'.format(new))
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logger.warning(''.join(message))
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logger.debug(''.join(
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six.text_type(x) for x in traceback.format_stack()))
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def fget(self):
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_warn()
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return getattr(self, new)
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def fset(self, value):
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_warn()
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setattr(self, new, value)
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def decorator(dummy):
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return property(fget=fget, fset=fset, doc=doc)
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return decorator
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def get_date(string):
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"""Return a datetime object from a string.
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If no format matches the given date, raise a ValueError.
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"""
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string = re.sub(' +', ' ', string)
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default = SafeDatetime.now().replace(hour=0, minute=0,
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second=0, microsecond=0)
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try:
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return dateutil.parser.parse(string, default=default)
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except (TypeError, ValueError):
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raise ValueError('{0!r} is not a valid date'.format(string))
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@contextmanager
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def pelican_open(filename, mode='rb', strip_crs=(sys.platform == 'win32')):
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"""Open a file and return its content"""
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with codecs.open(filename, mode, encoding='utf-8') as infile:
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content = infile.read()
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if content[0] == codecs.BOM_UTF8.decode('utf8'):
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content = content[1:]
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if strip_crs:
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content = content.replace('\r\n', '\n')
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yield content
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def slugify(value, substitutions=()):
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"""
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Normalizes string, converts to lowercase, removes non-alpha characters,
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and converts spaces to hyphens.
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Took from Django sources.
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"""
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# TODO Maybe steal again from current Django 1.5dev
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value = Markup(value).striptags()
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# value must be unicode per se
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import unicodedata
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from unidecode import unidecode
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# unidecode returns str in Py2 and 3, so in Py2 we have to make
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# it unicode again
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value = unidecode(value)
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if isinstance(value, six.binary_type):
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value = value.decode('ascii')
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# still unicode
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value = unicodedata.normalize('NFKD', value).lower()
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for src, dst in substitutions:
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value = value.replace(src.lower(), dst.lower())
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value = re.sub('[^\w\s-]', '', value).strip()
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value = re.sub('[-\s]+', '-', value)
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# we want only ASCII chars
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value = value.encode('ascii', 'ignore')
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# but Pelican should generally use only unicode
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return value.decode('ascii')
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def copy(source, destination, ignores=None):
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"""Recursively copy source into destination.
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If source is a file, destination has to be a file as well.
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The function is able to copy either files or directories.
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:param source: the source file or directory
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:param destination: the destination file or directory
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:param ignores: either None, or a list of glob patterns;
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files matching those patterns will _not_ be copied.
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"""
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def walk_error(err):
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logger.warning("While copying %s: %s: %s",
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source_, err.filename, err.strerror)
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source_ = os.path.abspath(os.path.expanduser(source))
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destination_ = os.path.abspath(os.path.expanduser(destination))
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if ignores is None:
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ignores = []
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if any(fnmatch.fnmatch(os.path.basename(source), ignore)
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for ignore in ignores):
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logger.info('Not copying %s due to ignores', source_)
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return
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if os.path.isfile(source_):
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dst_dir = os.path.dirname(destination_)
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if not os.path.exists(dst_dir):
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logger.info('Creating directory %s', dst_dir)
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os.makedirs(dst_dir)
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logger.info('Copying %s to %s', source_, destination_)
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shutil.copy2(source_, destination_)
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elif os.path.isdir(source_):
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if not os.path.exists(destination_):
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logger.info('Creating directory %s', destination_)
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os.makedirs(destination_)
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if not os.path.isdir(destination_):
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logger.warning('Cannot copy %s (a directory) to %s (a file)',
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source_, destination_)
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return
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for src_dir, subdirs, others in os.walk(source_):
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dst_dir = os.path.join(destination_,
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os.path.relpath(src_dir, source_))
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subdirs[:] = (s for s in subdirs if not any(fnmatch.fnmatch(s, i)
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for i in ignores))
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others[:] = (o for o in others if not any(fnmatch.fnmatch(o, i)
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for i in ignores))
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if not os.path.isdir(dst_dir):
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logger.info('Creating directory %s', dst_dir)
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# Parent directories are known to exist, so 'mkdir' suffices.
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os.mkdir(dst_dir)
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for o in others:
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src_path = os.path.join(src_dir, o)
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dst_path = os.path.join(dst_dir, o)
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if os.path.isfile(src_path):
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logger.info('Copying %s to %s', src_path, dst_path)
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shutil.copy2(src_path, dst_path)
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else:
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logger.warning('Skipped copy %s (not a file or directory) to %s',
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src_path, dst_path)
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def clean_output_dir(path, retention):
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"""Remove all files from output directory except those in retention list"""
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if not os.path.exists(path):
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logger.debug("Directory already removed: %s", path)
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return
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if not os.path.isdir(path):
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try:
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os.remove(path)
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except Exception as e:
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logger.error("Unable to delete file %s; %s", path, e)
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return
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# remove existing content from output folder unless in retention list
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for filename in os.listdir(path):
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file = os.path.join(path, filename)
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if any(filename == retain for retain in retention):
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logger.debug("Skipping deletion; %s is on retention list: %s",
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filename, file)
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elif os.path.isdir(file):
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try:
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shutil.rmtree(file)
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logger.debug("Deleted directory %s", file)
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except Exception as e:
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logger.error("Unable to delete directory %s; %s",
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file, e)
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elif os.path.isfile(file) or os.path.islink(file):
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try:
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os.remove(file)
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logger.debug("Deleted file/link %s", file)
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except Exception as e:
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logger.error("Unable to delete file %s; %s", file, e)
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else:
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logger.error("Unable to delete %s, file type unknown", file)
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def get_relative_path(path):
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"""Return the relative path from the given path to the root path."""
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components = split_all(path)
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if len(components) <= 1:
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return os.curdir
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else:
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parents = [os.pardir] * (len(components) - 1)
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return os.path.join(*parents)
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def path_to_url(path):
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"""Return the URL corresponding to a given path."""
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if os.sep == '/':
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return path
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else:
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return '/'.join(split_all(path))
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def posixize_path(rel_path):
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"""Use '/' as path separator, so that source references,
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like '{filename}/foo/bar.jpg' or 'extras/favicon.ico',
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will work on Windows as well as on Mac and Linux."""
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return rel_path.replace(os.sep, '/')
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def truncate_html_words(s, num, end_text='...'):
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"""Truncates HTML to a certain number of words.
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(not counting tags and comments). Closes opened tags if they were correctly
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closed in the given html. Takes an optional argument of what should be used
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to notify that the string has been truncated, defaulting to ellipsis (...).
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Newlines in the HTML are preserved. (From the django framework).
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"""
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length = int(num)
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if length <= 0:
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return ''
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html4_singlets = ('br', 'col', 'link', 'base', 'img', 'param', 'area',
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'hr', 'input')
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# Set up regular expressions
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re_words = re.compile(r'&.*?;|<.*?>|(\w[\w-]*)', re.U)
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re_tag = re.compile(r'<(/)?([^ ]+?)(?: (/)| .*?)?>')
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# Count non-HTML words and keep note of open tags
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pos = 0
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end_text_pos = 0
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words = 0
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open_tags = []
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while words <= length:
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m = re_words.search(s, pos)
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if not m:
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# Checked through whole string
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break
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pos = m.end(0)
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if m.group(1):
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# It's an actual non-HTML word
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words += 1
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if words == length:
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end_text_pos = pos
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continue
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# Check for tag
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tag = re_tag.match(m.group(0))
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if not tag or end_text_pos:
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# Don't worry about non tags or tags after our truncate point
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continue
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closing_tag, tagname, self_closing = tag.groups()
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tagname = tagname.lower() # Element names are always case-insensitive
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if self_closing or tagname in html4_singlets:
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pass
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elif closing_tag:
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# Check for match in open tags list
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try:
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i = open_tags.index(tagname)
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except ValueError:
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pass
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else:
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# SGML: An end tag closes, back to the matching start tag,
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# all unclosed intervening start tags with omitted end tags
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open_tags = open_tags[i + 1:]
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else:
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# Add it to the start of the open tags list
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open_tags.insert(0, tagname)
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if words <= length:
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# Don't try to close tags if we don't need to truncate
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return s
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out = s[:end_text_pos]
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if end_text:
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out += ' ' + end_text
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# Close any tags still open
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for tag in open_tags:
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out += '</%s>' % tag
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# Return string
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return out
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def process_translations(content_list, order_by=None):
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""" Finds translation and returns them.
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Returns a tuple with two lists (index, translations). Index list includes
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items in default language or items which have no variant in default
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language. Items with the `translation` metadata set to something else than
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`False` or `false` will be used as translations, unless all the items with
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the same slug have that metadata.
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For each content_list item, sets the 'translations' attribute.
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order_by can be a string of an attribute or sorting function. If order_by
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is defined, content will be ordered by that attribute or sorting function.
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By default, content is ordered by slug.
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Different content types can have default order_by attributes defined
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in settings, e.g. PAGES_ORDER_BY='sort-order', in which case `sort-order`
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should be a defined metadata attribute in each page.
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"""
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content_list.sort(key=attrgetter('slug'))
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grouped_by_slugs = groupby(content_list, attrgetter('slug'))
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index = []
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translations = []
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for slug, items in grouped_by_slugs:
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items = list(items)
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# items with `translation` metadata will be used as translations…
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default_lang_items = list(filter(
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lambda i: i.metadata.get('translation', 'false').lower()
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== 'false',
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items))
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# …unless all items with that slug are translations
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if not default_lang_items:
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default_lang_items = items
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# display warnings if several items have the same lang
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for lang, lang_items in groupby(items, attrgetter('lang')):
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lang_items = list(lang_items)
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len_ = len(lang_items)
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if len_ > 1:
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logger.warning('There are %s variants of "%s" with lang %s',
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len_, slug, lang)
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for x in lang_items:
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logger.warning('\t%s', x.source_path)
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# find items with default language
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default_lang_items = list(filter(attrgetter('in_default_lang'),
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default_lang_items))
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# if there is no article with default language, take an other one
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if not default_lang_items:
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default_lang_items = items[:1]
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if not slug:
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|
logger.warning(
|
|
'empty slug for %s. '
|
|
'You can fix this by adding a title or a slug to your '
|
|
'content',
|
|
default_lang_items[0].source_path)
|
|
index.extend(default_lang_items)
|
|
translations.extend([x for x in items if x not in default_lang_items])
|
|
for a in items:
|
|
a.translations = [x for x in items if x != a]
|
|
|
|
if order_by:
|
|
if callable(order_by):
|
|
try:
|
|
index.sort(key=order_by)
|
|
except Exception:
|
|
logger.error('Error sorting with function %s', order_by)
|
|
elif isinstance(order_by, six.string_types):
|
|
if order_by.startswith('reversed-'):
|
|
order_reversed = True
|
|
order_by = order_by.replace('reversed-', '', 1)
|
|
else:
|
|
order_reversed = False
|
|
|
|
if order_by == 'basename':
|
|
index.sort(key=lambda x: os.path.basename(x.source_path or ''),
|
|
reverse=order_reversed)
|
|
# already sorted by slug, no need to sort again
|
|
elif not (order_by == 'slug' and not order_reversed):
|
|
try:
|
|
index.sort(key=attrgetter(order_by),
|
|
reverse=order_reversed)
|
|
except AttributeError:
|
|
logger.warning('There is no "%s" attribute in the item '
|
|
'metadata. Defaulting to slug order.', order_by)
|
|
else:
|
|
logger.warning('Invalid *_ORDER_BY setting (%s).'
|
|
'Valid options are strings and functions.', order_by)
|
|
|
|
return index, translations
|
|
|
|
|
|
def folder_watcher(path, extensions, ignores=[]):
|
|
'''Generator for monitoring a folder for modifications.
|
|
|
|
Returns a boolean indicating if files are changed since last check.
|
|
Returns None if there are no matching files in the folder'''
|
|
|
|
def file_times(path):
|
|
'''Return `mtime` for each file in path'''
|
|
|
|
for root, dirs, files in os.walk(path, followlinks=True):
|
|
dirs[:] = [x for x in dirs if not x.startswith(os.curdir)]
|
|
|
|
for f in files:
|
|
if (f.endswith(tuple(extensions)) and
|
|
not any(fnmatch.fnmatch(f, ignore) for ignore in ignores)):
|
|
try:
|
|
yield os.stat(os.path.join(root, f)).st_mtime
|
|
except OSError as e:
|
|
logger.warning('Caught Exception: %s', e)
|
|
|
|
LAST_MTIME = 0
|
|
while True:
|
|
try:
|
|
mtime = max(file_times(path))
|
|
if mtime > LAST_MTIME:
|
|
LAST_MTIME = mtime
|
|
yield True
|
|
except ValueError:
|
|
yield None
|
|
else:
|
|
yield False
|
|
|
|
|
|
def file_watcher(path):
|
|
'''Generator for monitoring a file for modifications'''
|
|
LAST_MTIME = 0
|
|
while True:
|
|
if path:
|
|
try:
|
|
mtime = os.stat(path).st_mtime
|
|
except OSError as e:
|
|
logger.warning('Caught Exception: %s', e)
|
|
continue
|
|
|
|
if mtime > LAST_MTIME:
|
|
LAST_MTIME = mtime
|
|
yield True
|
|
else:
|
|
yield False
|
|
else:
|
|
yield None
|
|
|
|
|
|
def set_date_tzinfo(d, tz_name=None):
|
|
"""Set the timezone for dates that don't have tzinfo"""
|
|
if tz_name and not d.tzinfo:
|
|
tz = pytz.timezone(tz_name)
|
|
d = tz.localize(d)
|
|
return SafeDatetime(d.year, d.month, d.day, d.hour, d.minute, d.second,
|
|
d.microsecond, d.tzinfo)
|
|
return d
|
|
|
|
|
|
def mkdir_p(path):
|
|
try:
|
|
os.makedirs(path)
|
|
except OSError as e:
|
|
if e.errno != errno.EEXIST or not os.path.isdir(path):
|
|
raise
|
|
|
|
|
|
def split_all(path):
|
|
"""Split a path into a list of components
|
|
|
|
While os.path.split() splits a single component off the back of
|
|
`path`, this function splits all components:
|
|
|
|
>>> split_all(os.path.join('a', 'b', 'c'))
|
|
['a', 'b', 'c']
|
|
"""
|
|
components = []
|
|
path = path.lstrip('/')
|
|
while path:
|
|
head, tail = os.path.split(path)
|
|
if tail:
|
|
components.insert(0, tail)
|
|
elif head == path:
|
|
components.insert(0, head)
|
|
break
|
|
path = head
|
|
return components
|
|
|
|
|
|
def is_selected_for_writing(settings, path):
|
|
'''Check whether path is selected for writing
|
|
according to the WRITE_SELECTED list
|
|
|
|
If WRITE_SELECTED is an empty list (default),
|
|
any path is selected for writing.
|
|
'''
|
|
if settings['WRITE_SELECTED']:
|
|
return path in settings['WRITE_SELECTED']
|
|
else:
|
|
return True
|
|
|
|
|
|
def path_to_file_url(path):
|
|
'''Convert file-system path to file:// URL'''
|
|
return six.moves.urllib_parse.urljoin(
|
|
"file://", six.moves.urllib.request.pathname2url(path))
|
|
|
|
|
|
def maybe_pluralize(count, singular, plural):
|
|
'''
|
|
Returns a formatted string containing count and plural if count is not 1
|
|
Returns count and singular if count is 1
|
|
|
|
maybe_pluralize(0, 'Article', 'Articles') -> '0 Articles'
|
|
maybe_pluralize(1, 'Article', 'Articles') -> '1 Article'
|
|
maybe_pluralize(2, 'Article', 'Articles') -> '2 Articles'
|
|
|
|
'''
|
|
selection = plural
|
|
if count == 1:
|
|
selection = singular
|
|
return '{} {}'.format(count, selection)
|