341 lines
12 KiB
Python
341 lines
12 KiB
Python
import collections
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import json
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import os
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import sys
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from typing import Any, Dict, List
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# for MD conversion
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import mistune
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import re
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from xml.sax.saxutils import escape, quoteattr
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JSON = Dict[str, Any]
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class Key:
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def __init__(self, path: List[str]):
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self.path = path
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def __hash__(self):
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result = 0
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for id in self.path:
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result ^= hash(id)
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return result
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def __eq__(self, other):
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return type(self) is type(other) and self.path == other.path
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Option = collections.namedtuple('Option', ['name', 'value'])
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# pivot a dict of options keyed by their display name to a dict keyed by their path
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def pivot(options: Dict[str, JSON]) -> Dict[Key, Option]:
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result: Dict[Key, Option] = dict()
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for (name, opt) in options.items():
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result[Key(opt['loc'])] = Option(name, opt)
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return result
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# pivot back to indexed-by-full-name
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# like the docbook build we'll just fail if multiple options with differing locs
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# render to the same option name.
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def unpivot(options: Dict[Key, Option]) -> Dict[str, JSON]:
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result: Dict[str, Dict] = dict()
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for (key, opt) in options.items():
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if opt.name in result:
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raise RuntimeError(
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'multiple options with colliding ids found',
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opt.name,
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result[opt.name]['loc'],
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opt.value['loc'],
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)
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result[opt.name] = opt.value
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return result
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manpage_urls = json.load(open(os.getenv('MANPAGE_URLS')))
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admonitions = {
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'.warning': 'warning',
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'.important': 'important',
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'.note': 'note'
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}
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class Renderer(mistune.renderers.BaseRenderer):
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def _get_method(self, name):
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try:
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return super(Renderer, self)._get_method(name)
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except AttributeError:
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def not_supported(*args, **kwargs):
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raise NotImplementedError("md node not supported yet", name, args, **kwargs)
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return not_supported
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def text(self, text):
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return escape(text)
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def paragraph(self, text):
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return text + "\n\n"
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def newline(self):
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return "<literallayout>\n</literallayout>"
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def codespan(self, text):
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return f"<literal>{escape(text)}</literal>"
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def block_code(self, text, info=None):
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info = f" language={quoteattr(info)}" if info is not None else ""
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return f"<programlisting{info}>\n{escape(text)}</programlisting>"
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def link(self, link, text=None, title=None):
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tag = "link"
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if link[0:1] == '#':
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if text == "":
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tag = "xref"
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attr = "linkend"
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link = quoteattr(link[1:])
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else:
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# try to faithfully reproduce links that were of the form <link href="..."/>
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# in docbook format
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if text == link:
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text = ""
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attr = "xlink:href"
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link = quoteattr(link)
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return f"<{tag} {attr}={link}>{text}</{tag}>"
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def list(self, text, ordered, level, start=None):
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if ordered:
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raise NotImplementedError("ordered lists not supported yet")
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return f"<itemizedlist>\n{text}\n</itemizedlist>"
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def list_item(self, text, level):
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return f"<listitem><para>{text}</para></listitem>\n"
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def block_text(self, text):
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return text
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def emphasis(self, text):
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return f"<emphasis>{text}</emphasis>"
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def strong(self, text):
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return f"<emphasis role=\"strong\">{text}</emphasis>"
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def admonition(self, text, kind):
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if kind not in admonitions:
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raise NotImplementedError(f"admonition {kind} not supported yet")
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tag = admonitions[kind]
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# we don't keep whitespace here because usually we'll contain only
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# a single paragraph and the original docbook string is no longer
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# available to restore the trailer.
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return f"<{tag}><para>{text.rstrip()}</para></{tag}>"
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def block_quote(self, text):
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return f"<blockquote><para>{text}</para></blockquote>"
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def command(self, text):
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return f"<command>{escape(text)}</command>"
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def option(self, text):
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return f"<option>{escape(text)}</option>"
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def file(self, text):
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return f"<filename>{escape(text)}</filename>"
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def var(self, text):
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return f"<varname>{escape(text)}</varname>"
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def env(self, text):
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return f"<envar>{escape(text)}</envar>"
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def manpage(self, page, section):
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man = f"{page}({section})"
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title = f"<refentrytitle>{escape(page)}</refentrytitle>"
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vol = f"<manvolnum>{escape(section)}</manvolnum>"
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ref = f"<citerefentry>{title}{vol}</citerefentry>"
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if man in manpage_urls:
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return self.link(manpage_urls[man], text=ref)
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else:
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return ref
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def finalize(self, data):
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return "".join(data)
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def p_command(md):
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COMMAND_PATTERN = r'\{command\}`(.*?)`'
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def parse(self, m, state):
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return ('command', m.group(1))
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md.inline.register_rule('command', COMMAND_PATTERN, parse)
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md.inline.rules.append('command')
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def p_file(md):
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FILE_PATTERN = r'\{file\}`(.*?)`'
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def parse(self, m, state):
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return ('file', m.group(1))
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md.inline.register_rule('file', FILE_PATTERN, parse)
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md.inline.rules.append('file')
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def p_var(md):
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VAR_PATTERN = r'\{var\}`(.*?)`'
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def parse(self, m, state):
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return ('var', m.group(1))
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md.inline.register_rule('var', VAR_PATTERN, parse)
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md.inline.rules.append('var')
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def p_env(md):
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ENV_PATTERN = r'\{env\}`(.*?)`'
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def parse(self, m, state):
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return ('env', m.group(1))
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md.inline.register_rule('env', ENV_PATTERN, parse)
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md.inline.rules.append('env')
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def p_option(md):
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OPTION_PATTERN = r'\{option\}`(.*?)`'
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def parse(self, m, state):
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return ('option', m.group(1))
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md.inline.register_rule('option', OPTION_PATTERN, parse)
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md.inline.rules.append('option')
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def p_manpage(md):
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MANPAGE_PATTERN = r'\{manpage\}`(.*?)\((.+?)\)`'
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def parse(self, m, state):
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return ('manpage', m.group(1), m.group(2))
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md.inline.register_rule('manpage', MANPAGE_PATTERN, parse)
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md.inline.rules.append('manpage')
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def p_admonition(md):
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ADMONITION_PATTERN = re.compile(r'^::: \{([^\n]*?)\}\n(.*?)^:::$\n*', flags=re.MULTILINE|re.DOTALL)
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def parse(self, m, state):
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return {
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'type': 'admonition',
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'children': self.parse(m.group(2), state),
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'params': [ m.group(1) ],
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}
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md.block.register_rule('admonition', ADMONITION_PATTERN, parse)
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md.block.rules.append('admonition')
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md = mistune.create_markdown(renderer=Renderer(), plugins=[
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p_command, p_file, p_var, p_env, p_option, p_manpage, p_admonition
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])
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# converts in-place!
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def convertMD(options: Dict[str, Any]) -> str:
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def convertString(path: str, text: str) -> str:
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try:
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rendered = md(text)
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# keep trailing spaces so we can diff the generated XML to check for conversion bugs.
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return rendered.rstrip() + text[len(text.rstrip()):]
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except:
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print(f"error in {path}")
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raise
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def optionIs(option: Dict[str, Any], key: str, typ: str) -> bool:
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if key not in option: return False
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if type(option[key]) != dict: return False
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if '_type' not in option[key]: return False
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return option[key]['_type'] == typ
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for (name, option) in options.items():
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try:
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if optionIs(option, 'description', 'mdDoc'):
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option['description'] = convertString(name, option['description']['text'])
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elif markdownByDefault:
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option['description'] = convertString(name, option['description'])
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if optionIs(option, 'example', 'literalMD'):
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docbook = convertString(name, option['example']['text'])
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option['example'] = { '_type': 'literalDocBook', 'text': docbook }
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if optionIs(option, 'default', 'literalMD'):
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docbook = convertString(name, option['default']['text'])
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option['default'] = { '_type': 'literalDocBook', 'text': docbook }
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except Exception as e:
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raise Exception(f"Failed to render option {name}: {str(e)}")
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return options
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warningsAreErrors = False
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errorOnDocbook = False
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markdownByDefault = False
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optOffset = 0
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for arg in sys.argv[1:]:
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if arg == "--warnings-are-errors":
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optOffset += 1
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warningsAreErrors = True
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if arg == "--error-on-docbook":
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optOffset += 1
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errorOnDocbook = True
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if arg == "--markdown-by-default":
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optOffset += 1
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markdownByDefault = True
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options = pivot(json.load(open(sys.argv[1 + optOffset], 'r')))
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overrides = pivot(json.load(open(sys.argv[2 + optOffset], 'r')))
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# fix up declaration paths in lazy options, since we don't eval them from a full nixpkgs dir
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for (k, v) in options.items():
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# The _module options are not declared in nixos/modules
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if v.value['loc'][0] != "_module":
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v.value['declarations'] = list(map(lambda s: f'nixos/modules/{s}' if isinstance(s, str) else s, v.value['declarations']))
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# merge both descriptions
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for (k, v) in overrides.items():
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cur = options.setdefault(k, v).value
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for (ok, ov) in v.value.items():
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if ok == 'declarations':
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decls = cur[ok]
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for d in ov:
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if d not in decls:
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decls += [d]
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elif ok == "type":
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# ignore types of placeholder options
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if ov != "_unspecified" or cur[ok] == "_unspecified":
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cur[ok] = ov
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elif ov is not None or cur.get(ok, None) is None:
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cur[ok] = ov
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severity = "error" if warningsAreErrors else "warning"
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def is_docbook(o, key):
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val = o.get(key, {})
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if not isinstance(val, dict):
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return False
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return val.get('_type', '') == 'literalDocBook'
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# check that every option has a description
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hasWarnings = False
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hasErrors = False
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hasDocBookErrors = False
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for (k, v) in options.items():
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if errorOnDocbook:
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if isinstance(v.value.get('description', {}), str):
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hasErrors = True
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hasDocBookErrors = True
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print(
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f"\x1b[1;31merror: option {v.name} description uses DocBook\x1b[0m",
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file=sys.stderr)
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elif is_docbook(v.value, 'defaultText'):
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hasErrors = True
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hasDocBookErrors = True
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print(
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f"\x1b[1;31merror: option {v.name} default uses DocBook\x1b[0m",
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file=sys.stderr)
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elif is_docbook(v.value, 'example'):
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hasErrors = True
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hasDocBookErrors = True
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print(
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f"\x1b[1;31merror: option {v.name} example uses DocBook\x1b[0m",
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file=sys.stderr)
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if v.value.get('description', None) is None:
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hasWarnings = True
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print(f"\x1b[1;31m{severity}: option {v.name} has no description\x1b[0m", file=sys.stderr)
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v.value['description'] = "This option has no description."
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if v.value.get('type', "unspecified") == "unspecified":
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hasWarnings = True
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print(
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f"\x1b[1;31m{severity}: option {v.name} has no type. Please specify a valid type, see " +
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"https://nixos.org/manual/nixos/stable/index.html#sec-option-types\x1b[0m", file=sys.stderr)
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if hasDocBookErrors:
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print("Explanation: The documentation contains descriptions, examples, or defaults written in DocBook. " +
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"NixOS is in the process of migrating from DocBook to Markdown, and " +
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"DocBook is disallowed for in-tree modules. To change your contribution to "+
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"use Markdown, apply mdDoc and literalMD and use the *MD variants of option creation " +
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"functions where they are available. For example:\n" +
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"\n" +
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" example.foo = mkOption {\n" +
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" description = lib.mdDoc ''your description'';\n" +
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" defaultText = lib.literalMD ''your description of default'';\n" +
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" };\n" +
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"\n" +
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" example.enable = mkEnableOption (lib.mdDoc ''your thing'');\n" +
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" example.package = mkPackageOptionMD pkgs \"your-package\" {};\n" +
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" imports = [ (mkAliasOptionModuleMD [ \"example\" \"args\" ] [ \"example\" \"settings\" ]) ];",
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file = sys.stderr)
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if hasErrors:
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sys.exit(1)
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if hasWarnings and warningsAreErrors:
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print(
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"\x1b[1;31m" +
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"Treating warnings as errors. Set documentation.nixos.options.warningsAreErrors " +
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"to false to ignore these warnings." +
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"\x1b[0m",
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file=sys.stderr)
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sys.exit(1)
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json.dump(convertMD(unpivot(options)), fp=sys.stdout)
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