136 lines
4.0 KiB
Python
136 lines
4.0 KiB
Python
# -*- coding: utf-8 -*-
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# Copyright (c) 2011-2014 - Simon Conseil
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# Permission is hereby granted, free of charge, to any person obtaining a copy
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# of this software and associated documentation files (the "Software"), to
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# deal in the Software without restriction, including without limitation the
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# rights to use, copy, modify, merge, publish, distribute, sublicense, and/or
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# sell copies of the Software, and to permit persons to whom the Software is
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# furnished to do so, subject to the following conditions:
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# The above copyright notice and this permission notice shall be included in
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# all copies or substantial portions of the Software.
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# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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# FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS
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# IN THE SOFTWARE.
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import codecs
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import os
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import shutil
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from markdown import Markdown
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from subprocess import Popen, PIPE
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from . import compat
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VIDEO_MIMES = {'.mp4': 'video/mp4',
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'.webm': 'video/webm',
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'.ogv': 'video/ogg'}
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class Devnull(object):
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"""'Black hole' for output that should not be printed"""
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def write(self, *_):
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pass
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def flush(self, *_):
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pass
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def copy(src, dst, symlink=False):
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"""Copy or symlink the file."""
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func = os.symlink if symlink else shutil.copy2
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if symlink and os.path.lexists(dst):
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os.remove(dst)
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func(src, dst)
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def check_or_create_dir(path):
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"Create the directory if it does not exist"
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if not os.path.isdir(path):
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os.makedirs(path)
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def url_from_path(path):
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"""Transform path to url, converting backslashes to slashes if needed."""
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if os.sep == '/':
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return path
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else:
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return '/'.join(path.split(os.sep))
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def read_markdown(filename):
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"""Reads markdown file, converts output and fetches title and meta-data for
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further processing.
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"""
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# Use utf-8-sig codec to remove BOM if it is present. This is only possible
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# this way prior to feeding the text to the markdown parser (which would
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# also default to pure utf-8)
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with codecs.open(filename, 'r', 'utf-8-sig') as f:
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text = f.read()
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md = Markdown(extensions=['markdown.extensions.meta',
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'markdown.extensions.tables'],
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output_format='html5')
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output = {'description': md.convert(text)}
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try:
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meta = md.Meta.copy()
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except AttributeError:
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pass
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else:
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output['meta'] = meta
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output['title'] = md.Meta.get('title', [''])[0]
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return output
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def call_subprocess(cmd):
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"""Wrapper to call ``subprocess.Popen`` and return stdout & stderr."""
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p = Popen(cmd, stdout=PIPE, stderr=PIPE)
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stdout, stderr = p.communicate()
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if not compat.PY2:
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stderr = stderr.decode('utf8')
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stdout = stdout.decode('utf8')
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return p.returncode, stdout, stderr
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def is_valid_html5_video(ext):
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"""Checks if ext is a supported HTML5 video."""
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return ext in VIDEO_MIMES.keys()
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def get_mime(ext):
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"""Returns mime type for extension."""
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return VIDEO_MIMES[ext]
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class cached_property(object):
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""" A property that is only computed once per instance and then replaces
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itself with an ordinary attribute. Deleting the attribute resets the
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property.
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Source:
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https://github.com/pydanny/cached-property (BSD Licensed)
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https://github.com/bottlepy/bottle/commit/fa7733e075da0d790d809aa3d2f53071897e6f76
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"""
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def __init__(self, func):
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self.__doc__ = getattr(func, '__doc__')
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self.func = func
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def __get__(self, obj, cls):
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if obj is None:
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return self
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value = obj.__dict__[self.func.__name__] = self.func(obj)
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return value
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