forked from varia/varia.website
306 lines
11 KiB
Python
306 lines
11 KiB
Python
# $Id: peps.py 7995 2016-12-10 17:50:59Z milde $
|
|
# Author: David Goodger <goodger@python.org>
|
|
# Copyright: This module has been placed in the public domain.
|
|
|
|
"""
|
|
Transforms for PEP processing.
|
|
|
|
- `Headers`: Used to transform a PEP's initial RFC-2822 header. It remains a
|
|
field list, but some entries get processed.
|
|
- `Contents`: Auto-inserts a table of contents.
|
|
- `PEPZero`: Special processing for PEP 0.
|
|
"""
|
|
|
|
__docformat__ = 'reStructuredText'
|
|
|
|
import sys
|
|
import os
|
|
import re
|
|
import time
|
|
from docutils import nodes, utils, languages
|
|
from docutils import ApplicationError, DataError
|
|
from docutils.transforms import Transform, TransformError
|
|
from docutils.transforms import parts, references, misc
|
|
|
|
|
|
class Headers(Transform):
|
|
|
|
"""
|
|
Process fields in a PEP's initial RFC-2822 header.
|
|
"""
|
|
|
|
default_priority = 360
|
|
|
|
pep_url = 'pep-%04d'
|
|
pep_cvs_url = ('http://hg.python.org'
|
|
'/peps/file/default/pep-%04d.txt')
|
|
rcs_keyword_substitutions = (
|
|
(re.compile(r'\$' r'RCSfile: (.+),v \$$', re.IGNORECASE), r'\1'),
|
|
(re.compile(r'\$[a-zA-Z]+: (.+) \$$'), r'\1'),)
|
|
|
|
def apply(self):
|
|
if not len(self.document):
|
|
# @@@ replace these DataErrors with proper system messages
|
|
raise DataError('Document tree is empty.')
|
|
header = self.document[0]
|
|
if not isinstance(header, nodes.field_list) or \
|
|
'rfc2822' not in header['classes']:
|
|
raise DataError('Document does not begin with an RFC-2822 '
|
|
'header; it is not a PEP.')
|
|
pep = None
|
|
for field in header:
|
|
if field[0].astext().lower() == 'pep': # should be the first field
|
|
value = field[1].astext()
|
|
try:
|
|
pep = int(value)
|
|
cvs_url = self.pep_cvs_url % pep
|
|
except ValueError:
|
|
pep = value
|
|
cvs_url = None
|
|
msg = self.document.reporter.warning(
|
|
'"PEP" header must contain an integer; "%s" is an '
|
|
'invalid value.' % pep, base_node=field)
|
|
msgid = self.document.set_id(msg)
|
|
prb = nodes.problematic(value, value or '(none)',
|
|
refid=msgid)
|
|
prbid = self.document.set_id(prb)
|
|
msg.add_backref(prbid)
|
|
if len(field[1]):
|
|
field[1][0][:] = [prb]
|
|
else:
|
|
field[1] += nodes.paragraph('', '', prb)
|
|
break
|
|
if pep is None:
|
|
raise DataError('Document does not contain an RFC-2822 "PEP" '
|
|
'header.')
|
|
if pep == 0:
|
|
# Special processing for PEP 0.
|
|
pending = nodes.pending(PEPZero)
|
|
self.document.insert(1, pending)
|
|
self.document.note_pending(pending)
|
|
if len(header) < 2 or header[1][0].astext().lower() != 'title':
|
|
raise DataError('No title!')
|
|
for field in header:
|
|
name = field[0].astext().lower()
|
|
body = field[1]
|
|
if len(body) > 1:
|
|
raise DataError('PEP header field body contains multiple '
|
|
'elements:\n%s' % field.pformat(level=1))
|
|
elif len(body) == 1:
|
|
if not isinstance(body[0], nodes.paragraph):
|
|
raise DataError('PEP header field body may only contain '
|
|
'a single paragraph:\n%s'
|
|
% field.pformat(level=1))
|
|
elif name == 'last-modified':
|
|
date = time.strftime(
|
|
'%d-%b-%Y',
|
|
time.localtime(os.stat(self.document['source'])[8]))
|
|
if cvs_url:
|
|
body += nodes.paragraph(
|
|
'', '', nodes.reference('', date, refuri=cvs_url))
|
|
else:
|
|
# empty
|
|
continue
|
|
para = body[0]
|
|
if name == 'author':
|
|
for node in para:
|
|
if isinstance(node, nodes.reference):
|
|
node.replace_self(mask_email(node))
|
|
elif name == 'discussions-to':
|
|
for node in para:
|
|
if isinstance(node, nodes.reference):
|
|
node.replace_self(mask_email(node, pep))
|
|
elif name in ('replaces', 'replaced-by', 'requires'):
|
|
newbody = []
|
|
space = nodes.Text(' ')
|
|
for refpep in re.split(r',?\s+', body.astext()):
|
|
pepno = int(refpep)
|
|
newbody.append(nodes.reference(
|
|
refpep, refpep,
|
|
refuri=(self.document.settings.pep_base_url
|
|
+ self.pep_url % pepno)))
|
|
newbody.append(space)
|
|
para[:] = newbody[:-1] # drop trailing space
|
|
elif name == 'last-modified':
|
|
utils.clean_rcs_keywords(para, self.rcs_keyword_substitutions)
|
|
if cvs_url:
|
|
date = para.astext()
|
|
para[:] = [nodes.reference('', date, refuri=cvs_url)]
|
|
elif name == 'content-type':
|
|
pep_type = para.astext()
|
|
uri = self.document.settings.pep_base_url + self.pep_url % 12
|
|
para[:] = [nodes.reference('', pep_type, refuri=uri)]
|
|
elif name == 'version' and len(body):
|
|
utils.clean_rcs_keywords(para, self.rcs_keyword_substitutions)
|
|
|
|
|
|
class Contents(Transform):
|
|
|
|
"""
|
|
Insert an empty table of contents topic and a transform placeholder into
|
|
the document after the RFC 2822 header.
|
|
"""
|
|
|
|
default_priority = 380
|
|
|
|
def apply(self):
|
|
language = languages.get_language(self.document.settings.language_code,
|
|
self.document.reporter)
|
|
name = language.labels['contents']
|
|
title = nodes.title('', name)
|
|
topic = nodes.topic('', title, classes=['contents'])
|
|
name = nodes.fully_normalize_name(name)
|
|
if not self.document.has_name(name):
|
|
topic['names'].append(name)
|
|
self.document.note_implicit_target(topic)
|
|
pending = nodes.pending(parts.Contents)
|
|
topic += pending
|
|
self.document.insert(1, topic)
|
|
self.document.note_pending(pending)
|
|
|
|
|
|
class TargetNotes(Transform):
|
|
|
|
"""
|
|
Locate the "References" section, insert a placeholder for an external
|
|
target footnote insertion transform at the end, and schedule the
|
|
transform to run immediately.
|
|
"""
|
|
|
|
default_priority = 520
|
|
|
|
def apply(self):
|
|
doc = self.document
|
|
i = len(doc) - 1
|
|
refsect = copyright = None
|
|
while i >= 0 and isinstance(doc[i], nodes.section):
|
|
title_words = doc[i][0].astext().lower().split()
|
|
if 'references' in title_words:
|
|
refsect = doc[i]
|
|
break
|
|
elif 'copyright' in title_words:
|
|
copyright = i
|
|
i -= 1
|
|
if not refsect:
|
|
refsect = nodes.section()
|
|
refsect += nodes.title('', 'References')
|
|
doc.set_id(refsect)
|
|
if copyright:
|
|
# Put the new "References" section before "Copyright":
|
|
doc.insert(copyright, refsect)
|
|
else:
|
|
# Put the new "References" section at end of doc:
|
|
doc.append(refsect)
|
|
pending = nodes.pending(references.TargetNotes)
|
|
refsect.append(pending)
|
|
self.document.note_pending(pending, 0)
|
|
pending = nodes.pending(misc.CallBack,
|
|
details={'callback': self.cleanup_callback})
|
|
refsect.append(pending)
|
|
self.document.note_pending(pending, 1)
|
|
|
|
def cleanup_callback(self, pending):
|
|
"""
|
|
Remove an empty "References" section.
|
|
|
|
Called after the `references.TargetNotes` transform is complete.
|
|
"""
|
|
if len(pending.parent) == 2: # <title> and <pending>
|
|
pending.parent.parent.remove(pending.parent)
|
|
|
|
|
|
class PEPZero(Transform):
|
|
|
|
"""
|
|
Special processing for PEP 0.
|
|
"""
|
|
|
|
default_priority =760
|
|
|
|
def apply(self):
|
|
visitor = PEPZeroSpecial(self.document)
|
|
self.document.walk(visitor)
|
|
self.startnode.parent.remove(self.startnode)
|
|
|
|
|
|
class PEPZeroSpecial(nodes.SparseNodeVisitor):
|
|
|
|
"""
|
|
Perform the special processing needed by PEP 0:
|
|
|
|
- Mask email addresses.
|
|
|
|
- Link PEP numbers in the second column of 4-column tables to the PEPs
|
|
themselves.
|
|
"""
|
|
|
|
pep_url = Headers.pep_url
|
|
|
|
def unknown_visit(self, node):
|
|
pass
|
|
|
|
def visit_reference(self, node):
|
|
node.replace_self(mask_email(node))
|
|
|
|
def visit_field_list(self, node):
|
|
if 'rfc2822' in node['classes']:
|
|
raise nodes.SkipNode
|
|
|
|
def visit_tgroup(self, node):
|
|
self.pep_table = node['cols'] == 4
|
|
self.entry = 0
|
|
|
|
def visit_colspec(self, node):
|
|
self.entry += 1
|
|
if self.pep_table and self.entry == 2:
|
|
node['classes'].append('num')
|
|
|
|
def visit_row(self, node):
|
|
self.entry = 0
|
|
|
|
def visit_entry(self, node):
|
|
self.entry += 1
|
|
if self.pep_table and self.entry == 2 and len(node) == 1:
|
|
node['classes'].append('num')
|
|
p = node[0]
|
|
if isinstance(p, nodes.paragraph) and len(p) == 1:
|
|
text = p.astext()
|
|
try:
|
|
pep = int(text)
|
|
ref = (self.document.settings.pep_base_url
|
|
+ self.pep_url % pep)
|
|
p[0] = nodes.reference(text, text, refuri=ref)
|
|
except ValueError:
|
|
pass
|
|
|
|
|
|
non_masked_addresses = ('peps@python.org',
|
|
'python-list@python.org',
|
|
'python-dev@python.org')
|
|
|
|
def mask_email(ref, pepno=None):
|
|
"""
|
|
Mask the email address in `ref` and return a replacement node.
|
|
|
|
`ref` is returned unchanged if it contains no email address.
|
|
|
|
For email addresses such as "user@host", mask the address as "user at
|
|
host" (text) to thwart simple email address harvesters (except for those
|
|
listed in `non_masked_addresses`). If a PEP number (`pepno`) is given,
|
|
return a reference including a default email subject.
|
|
"""
|
|
if ref.hasattr('refuri') and ref['refuri'].startswith('mailto:'):
|
|
if ref['refuri'][8:] in non_masked_addresses:
|
|
replacement = ref[0]
|
|
else:
|
|
replacement_text = ref.astext().replace('@', ' at ')
|
|
replacement = nodes.raw('', replacement_text, format='html')
|
|
if pepno is None:
|
|
return replacement
|
|
else:
|
|
ref['refuri'] += '?subject=PEP%%20%s' % pepno
|
|
ref[:] = [replacement]
|
|
return ref
|
|
else:
|
|
return ref
|