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"""
pygments.sphinxext
~~~~~~~~~~~~~~~~~~
Sphinx extension to generate automatic documentation of lexers,
formatters and filters.
:copyright: Copyright 2006-2023 by the Pygments team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
import sys
from docutils import nodes
from docutils.statemachine import ViewList
from docutils.parsers.rst import Directive
from sphinx.util.nodes import nested_parse_with_titles
MODULEDOC = '''
.. module:: %s
%s
%s
'''
LEXERDOC = '''
.. class:: %s
:Short names: %s
:Filenames: %s
:MIME types: %s
%s
'''
FMTERDOC = '''
.. class:: %s
:Short names: %s
:Filenames: %s
%s
'''
FILTERDOC = '''
.. class:: %s
:Name: %s
%s
'''
class PygmentsDoc(Directive):
"""
A directive to collect all lexers/formatters/filters and generate
autoclass directives for them.
"""
has_content = False
required_arguments = 1
optional_arguments = 0
final_argument_whitespace = False
option_spec = {}
def run(self):
self.filenames = set()
if self.arguments[0] == 'lexers':
out = self.document_lexers()
elif self.arguments[0] == 'formatters':
out = self.document_formatters()
elif self.arguments[0] == 'filters':
out = self.document_filters()
elif self.arguments[0] == 'lexers_overview':
out = self.document_lexers_overview()
else:
raise Exception('invalid argument for "pygmentsdoc" directive')
node = nodes.compound()
vl = ViewList(out.split('\n'), source='')
nested_parse_with_titles(self.state, vl, node)
for fn in self.filenames:
self.state.document.settings.record_dependencies.add(fn)
return node.children
def document_lexers_overview(self):
"""Generate a tabular overview of all lexers.
The columns are the lexer name, the extensions handled by this lexer
(or "None"), the aliases and a link to the lexer class."""
from pygments.lexers._mapping import LEXERS
import pygments.lexers
out = []
table = []
def format_link(name, url):
if url:
return f'`{name} <{url}>`_'
return name
for classname, data in sorted(LEXERS.items(), key=lambda x: x[1][1].lower()):
lexer_cls = pygments.lexers.find_lexer_class(data[1])
extensions = lexer_cls.filenames + lexer_cls.alias_filenames
table.append({
'name': format_link(data[1], lexer_cls.url),
'extensions': ', '.join(extensions).replace('*', '\\*').replace('_', '\\') or 'None',
'aliases': ', '.join(data[2]),
'class': f'{data[0]}.{classname}'
})
column_names = ['name', 'extensions', 'aliases', 'class']
column_lengths = [max([len(row[column]) for row in table if row[column]])
for column in column_names]
def write_row(*columns):
"""Format a table row"""
out = []
for l, c in zip(column_lengths, columns):
if c:
out.append(c.ljust(l))
else:
out.append(' '*l)
return ' '.join(out)
def write_seperator():
"""Write a table separator row"""
sep = ['='*c for c in column_lengths]
return write_row(*sep)
out.append(write_seperator())
out.append(write_row('Name', 'Extension(s)', 'Short name(s)', 'Lexer class'))
out.append(write_seperator())
for row in table:
out.append(write_row(
row['name'],
row['extensions'],
row['aliases'],
f':class:`~{row["class"]}`'))
out.append(write_seperator())
return '\n'.join(out)
def document_lexers(self):
from pygments.lexers._mapping import LEXERS
import pygments
import inspect
import pathlib
out = []
modules = {}
moduledocstrings = {}
for classname, data in sorted(LEXERS.items(), key=lambda x: x[0]):
module = data[0]
mod = __import__(module, None, None, [classname])
self.filenames.add(mod.__file__)
cls = getattr(mod, classname)
if not cls.__doc__:
print("Warning: %s does not have a docstring." % classname)
docstring = cls.__doc__
if isinstance(docstring, bytes):
docstring = docstring.decode('utf8')
example_file = getattr(cls, '_example', None)
if example_file:
p = pathlib.Path(inspect.getabsfile(pygments)).parent.parent /\
'tests' / 'examplefiles' / example_file
content = p.read_text(encoding='utf-8')
if not content:
raise Exception(
f"Empty example file '{example_file}' for lexer "
f"{classname}")
if data[2]:
lexer_name = data[2][0]
docstring += '\n\n .. admonition:: Example\n'
docstring += f'\n .. code-block:: {lexer_name}\n\n'
for line in content.splitlines():
docstring += f' {line}\n'
modules.setdefault(module, []).append((
classname,
', '.join(data[2]) or 'None',
', '.join(data[3]).replace('*', '\\*').replace('_', '\\') or 'None',
', '.join(data[4]) or 'None',
docstring))
if module not in moduledocstrings:
moddoc = mod.__doc__
if isinstance(moddoc, bytes):
moddoc = moddoc.decode('utf8')
moduledocstrings[module] = moddoc
for module, lexers in sorted(modules.items(), key=lambda x: x[0]):
if moduledocstrings[module] is None:
raise Exception("Missing docstring for %s" % (module,))
heading = moduledocstrings[module].splitlines()[4].strip().rstrip('.')
out.append(MODULEDOC % (module, heading, '-'*len(heading)))
for data in lexers:
out.append(LEXERDOC % data)
return ''.join(out)
def document_formatters(self):
from pygments.formatters import FORMATTERS
out = []
for classname, data in sorted(FORMATTERS.items(), key=lambda x: x[0]):
module = data[0]
mod = __import__(module, None, None, [classname])
self.filenames.add(mod.__file__)
cls = getattr(mod, classname)
docstring = cls.__doc__
if isinstance(docstring, bytes):
docstring = docstring.decode('utf8')
heading = cls.__name__
out.append(FMTERDOC % (heading, ', '.join(data[2]) or 'None',
', '.join(data[3]).replace('*', '\\*') or 'None',
docstring))
return ''.join(out)
def document_filters(self):
from pygments.filters import FILTERS
out = []
for name, cls in FILTERS.items():
self.filenames.add(sys.modules[cls.__module__].__file__)
docstring = cls.__doc__
if isinstance(docstring, bytes):
docstring = docstring.decode('utf8')
out.append(FILTERDOC % (cls.__name__, name, docstring))
return ''.join(out)
def setup(app):
app.add_directive('pygmentsdoc', PygmentsDoc)
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