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executable file
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#!/usr/bin/env python3
# This is free and unencumbered software released into the public
# domain.
# Anyone is free to copy, modify, publish, use, compile, sell, or
# distribute this software, either in source code form or as a
# compiled binary, for any purpose, commercial or non-commercial, and
# by any means.
# In jurisdictions that recognize copyright laws, the author or
# authors of this software dedicate any and all copyright interest in
# the software to the public domain. We make this dedication for the
# benefit of the public at large and to the detriment of our heirs
# and successors. We intend this dedication to be an overt act of
# relinquishment in perpetuity of all present and future rights to
# this software under copyright law.
# 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 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.
# For more information, please refer to <http://unlicense.org>
"""Create HTML files of the tutorial."""
import argparse
import os
import posixpath
import shutil
import string
import sys
import textwrap
import webbrowser
try:
import mistune
except ImportError:
print("mistune isn't installed.", file=sys.stderr)
print("You can install it like this:")
print()
print(">>> import pip")
print(">>> pip.main(['install', '--user', 'mistune'])")
sys.exit(1)
try:
import pygments.formatters
import pygments.lexers
import pygments.styles
except ImportError:
# we can work without pygments, but we won't get colors
pygments = None
import common
HTML_TEMPLATE = """\
<!DOCTYPE html>
<html>
<head>
<meta charset="UTF-8">
<title>{title}</title>
<link rel="stylesheet" type="text/css" href="{stylefile}">
</head>
<body>
{body}
</body>
</html>
"""
def mkdir_slashfix_open(filename, mode):
"""Like common.slashfix_open(), but make directories as needed."""
real_filename = common.slashfix(filename)
directory = os.path.dirname(real_filename)
os.makedirs(directory, exist_ok=True)
return open(real_filename, mode)
def fix_filename(filename):
renames = [('README.md', 'index.html'),
('LICENSE', 'LICENSE.txt')]
for before, after in renames:
if posixpath.basename(filename) == before:
# BEFORE -> AFTER
# some/place/BEFORE -> some/place/AFTER
return filename[:-len(before)] + after
if filename.endswith('.md'):
filename = filename[:-3] + '.html'
return filename
class TutorialRenderer(mistune.Renderer):
def __init__(self, pygments_style):
super().__init__()
self.pygments_style = pygments_style
self.title = None # will be set by header()
self._headercounts = {}
def _get_header_link(self, title):
"""Return a github-style link target for a title.
>>> r = TutorialRenderer()
>>> r._get_header_link('Hello there!')
'hello-there'
>>> r._get_header_link('Hello there!')
'hello-there-1'
>>> r._get_header_link('Hello there!')
'hello-there-2'
>>>
"""
result = ''
for character in title:
if character in string.whitespace:
result += '-'
elif character in string.punctuation:
pass
else:
result += character.lower()
if result not in self._headercounts:
# this title appears in this file for the first time
self._headercounts[result] = 1
return result
# there has been already a link with the same text on this page,
# we need to do thetitle, thetitle-1, thetitle-2, etc.
real_result = '%s-%d' % (result, self._headercounts[result])
self._headercounts[result] += 1
return real_result
def header(self, text, level, raw):
"""Create a header that is also a link and a # link target."""
# "# raw"
if level == 1:
self.title = text
target = self._get_header_link(raw)
content = super().header(text, level, raw)
return '<a name="{0}" href="#{0}">{1}</a>'.format(target, content)
def link(self, link, title, text):
"""Return a link that points to the correct file."""
# "[text](link)"
if link.startswith('#'):
# it's like "#title", no need to do anything
pass
elif '#' in link:
# it's like "some-file#title", we need to fix some-file
before, after = link.split('#', 1)
link = fix_filename(before) + '#' + after
else:
# it's like "some-file"
link = fix_filename(link)
return super().link(link, title, text)
def block_code(self, code, lang=None):
"""Highlight Python code blocks with Pygments if it's installed."""
if lang == 'python' and pygments is not None:
# we can highlight it
if code.startswith('>>> '):
lexer = pygments.lexers.PythonConsoleLexer()
else:
lexer = pygments.lexers.PythonLexer()
formatter = pygments.formatters.HtmlFormatter(
style=self.pygments_style, noclasses=True)
return pygments.highlight(code, lexer, formatter)
# we can't highlight it
return super().block_code(code, lang)
def image(self, src, title, text):
"""Return an image inside a link."""
result = super().image(src, title, text)
return self.link(src, title, result)
def table(self, header, body):
"""Return a table with a border."""
result = super().table(header, body)
return result.replace('<table>', '<table border="1">', 1)
def wrap_text(text):
"""Like textwrap.fill, but respects newlines."""
result = []
for part in text.split('\n'):
result.append(textwrap.fill(part))
return '\n'.join(result)
def main():
desc = ("Create HTML files of the tutorial.\n\n"
"The files have light text on a dark background by "
"default, and you can edit html-style.css to change that.")
if pygments is not None:
desc += (
" Editing the style file doesn't change the colors of the "
"code examples, but you can use the --pygments-style "
"option. Search for 'pygments style gallery' online or see "
"https://help.farbox.com/pygments.html to get an idea of "
"what different styles look like.")
parser = argparse.ArgumentParser(
description=wrap_text(desc),
formatter_class=argparse.RawDescriptionHelpFormatter)
parser.add_argument(
'-o', '--outdir', default='html',
help="write the HTML files here, defaults to %(default)r")
if pygments is not None:
parser.add_argument(
'--pygments-style', metavar='STYLE', default='native',
choices=list(pygments.styles.get_all_styles()),
help=("the Pygments color style (see above), "
"%(default)r by default"))
args = parser.parse_args()
if pygments is None:
print("Pygments isn't installed. You can install it like this:")
print()
print(">>> import pip")
print(">>> pip.main(['install', '--user', 'pygments'])")
print()
print("You can also continue without Pygments, but the code examples")
print("will not be colored.")
if not common.askyesno("Continue without pygments?"):
print("Interrupt.")
return
if os.path.exists(args.outdir):
if not common.askyesno("%s exists. Do you want to remove it?"
% args.outdir):
print("Interrupt.")
return
if os.path.isdir(args.outdir):
shutil.rmtree(args.outdir)
else:
os.remove(args.outdir)
print("Generating HTML files...")
for markdownfile in common.get_markdown_files():
fixed_markdownfile = fix_filename(markdownfile)
htmlfile = posixpath.join(args.outdir, fixed_markdownfile)
print(' %-30.30s --> %-30.30s' % (markdownfile, htmlfile), end='\r')
with common.slashfix_open(markdownfile, 'r') as f:
markdown = f.read()
renderer = TutorialRenderer(args.pygments_style)
body = mistune.markdown(markdown, renderer=renderer)
stylefile = posixpath.relpath(
'style.css', posixpath.dirname(fixed_markdownfile))
html = HTML_TEMPLATE.format(
title=renderer.title,
body=body,
stylefile=stylefile,
)
with mkdir_slashfix_open(htmlfile, 'w') as f:
print(html, file=f)
print()
print("Copying other files...")
shutil.copytree('images', os.path.join(args.outdir, 'images'))
shutil.copy('LICENSE', os.path.join(args.outdir, 'LICENSE.txt'))
shutil.copy('html-style.css', os.path.join(args.outdir, 'style.css'))
print("\n*********************\n")
print("Ready! The files are in %r." % args.outdir)
print("You can go there and double-click index.html to read the tutorial.")
print()
if common.askyesno("Do you want to view the tutorial now?", default=False):
print("Opening the tutorial...")
webbrowser.open(os.path.join(args.outdir, 'index.html'))
if __name__ == '__main__':
main()
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