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from docutils.parsers.rst import Directive, nodes
from docutils.utils import new_document
from recommonmark.parser import CommonMarkParser
import importlib
import textwrap
class WPTLintRules(Directive):
"""A docutils directive to generate documentation for the
web-platform-test-test's linting tool from its source code. Requires a
single argument: a Python module specifier for a file which declares
linting rules."""
has_content = True
required_arguments = 1
optional_arguments = 0
_md_parser = CommonMarkParser()
@staticmethod
def _parse_markdown(markdown):
WPTLintRules._md_parser.parse(markdown, new_document("<string>"))
return WPTLintRules._md_parser.document.children[0]
@property
def module_specifier(self):
return self.arguments[0]
def _get_rules(self):
try:
module = importlib.import_module(self.module_specifier)
except ImportError:
raise ImportError(
"""wpt-lint-rules: unable to resolve the module at "{}".""".format(self.module_specifier)
)
for binding_name, value in module.__dict__.items():
if hasattr(value, "__abstractmethods__") and len(value.__abstractmethods__):
continue
description = getattr(value, "description", None)
name = getattr(value, "name", None)
to_fix = getattr(value, "to_fix", None)
if description is None:
continue
if to_fix is not None:
to_fix = textwrap.dedent(to_fix)
yield {
"name": name,
"description": textwrap.dedent(description),
"to_fix": to_fix
}
def run(self):
definition_list = nodes.definition_list()
for rule in sorted(self._get_rules(), key=lambda rule: rule['name']):
item = nodes.definition_list_item()
definition = nodes.definition()
term = nodes.term()
item += term
item += definition
definition_list += item
term += nodes.literal(text=rule["name"])
definition += WPTLintRules._parse_markdown(rule["description"])
if rule["to_fix"]:
definition += nodes.strong(text="To fix:")
definition += WPTLintRules._parse_markdown(rule["to_fix"])
if len(definition_list.children) == 0:
raise Exception(
"""wpt-lint-rules: no linting rules found at "{}".""".format(self.module_specifier)
)
return [definition_list]
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