forked from ros-infrastructure/rep
-
Notifications
You must be signed in to change notification settings - Fork 1
/
docutils_transforms_reps.py
312 lines (264 loc) · 11.1 KB
/
docutils_transforms_reps.py
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
# $Id: reps.py 4564 2006-05-21 20:44:42Z wiemann $
# Author: David Goodger <[email protected]>
# Copyright: This module has been placed in the public domain.
"""
Transforms for REP processing.
- `Headers`: Used to transform a REP's initial RFC-2822 header. It remains a
field list, but some entries get processed.
- `Contents`: Auto-inserts a table of contents.
- `REPZero`: Special processing for REP 0.
"""
__docformat__ = 'reStructuredText'
import os
import re
import time
from docutils import nodes, utils, languages
from docutils import DataError
from docutils.transforms import Transform
from docutils.transforms import parts, references, misc
class Headers(Transform):
"""Process fields in a REP's initial RFC-2822 header."""
default_priority = 360
rep_rst_nr = 12
rep_url = 'rep-%04d.html'
rep_git_url = \
'https://github.com/ros-infrastructure/rep/blob/master/rep-%04d.rst'
rcs_keyword_substitutions = (
(re.compile(r'\$' r'RCSfile: (.+),v \$$', re.IGNORECASE), r'\1'),
(re.compile(r'\$[a-zA-Z]+: (.+) \$$'), r'\1'),)
def apply(self):
self.document.settings.rep_base_url = 'https://ros.org/reps/'
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 REP.')
rep = None
for field in header:
if field[0].astext().lower() == 'rep': # should be the first field
value = field[1].astext()
try:
rep = int(value)
repo_url = self.rep_git_url % rep
except ValueError:
rep = value
repo_url = None
msg = self.document.reporter.warning(
'"REP" header must contain an integer; "%s" is an '
'invalid value.' % rep, 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 rep is None:
raise DataError('Document does not contain an RFC-2822 "REP" '
'header.')
if rep == 0:
# Special processing for REP 0.
pending = nodes.pending(REPZero)
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('REP 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('REP 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 repo_url:
body += nodes.paragraph(
'', '', nodes.reference('', date, refuri=repo_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, rep))
elif name in ('replaces', 'replaced-by', 'requires'):
newbody = []
space = nodes.Text(' ')
for refrep in re.split(',?\s+', body.astext()):
repno = int(refrep)
newbody.append(nodes.reference(
refrep, refrep,
refuri=(self.document.settings.rep_base_url
+ self.rep_url % repno)))
newbody.append(space)
para[:] = newbody[:-1] # drop trailing space
elif name == 'last-modified':
utils.clean_rcs_keywords(para, self.rcs_keyword_substitutions)
if repo_url:
date = para.astext()
para[:] = [nodes.reference('', date, refuri=repo_url)]
elif name == 'content-type':
rep_type = para.astext()
uri = (self.document.settings.rep_base_url + self.rep_url
% self.rep_rst_nr)
para[:] = [nodes.reference('', rep_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):
try:
#incompatible API change in docutils
language = languages.get_language(
self.document.settings.language_code, None)
except TypeError:
language = languages.get_language(
self.document.settings.language_code)
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 REPZero(Transform):
"""Special processing for REP 0."""
default_priority = 760
def apply(self):
visitor = REPZeroSpecial(self.document)
self.document.walk(visitor)
self.startnode.parent.remove(self.startnode)
class REPZeroSpecial(nodes.SparseNodeVisitor):
"""
Perform the special processing needed by REP 0:
- Mask email addresses.
- Link REP numbers in the second column of 4-column tables to the REPs
themselves.
"""
rep_url = Headers.rep_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.rep_table = node['cols'] == 4
self.entry = 0
def visit_colspec(self, node):
self.entry += 1
if self.rep_table and self.entry == 2:
node['classes'].append('num')
def visit_row(self, node):
self.entry = 0
def visit_entry(self, node):
self.document.settings.rep_base_url = 'https://ros.org/reps/'
self.entry += 1
if self.rep_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:
rep = int(text)
ref = (self.document.settings.rep_base_url
+ self.rep_url % rep)
p[0] = nodes.reference(text, text, refuri=ref)
except ValueError:
pass
non_masked_addresses = ('[email protected]',
def mask_email(ref, repno=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 REP number (`repno`) 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 repno is None:
return replacement
else:
ref['refuri'] += '?subject=REP%%20%s' % repno
ref[:] = [replacement]
return ref
else:
return ref