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
|
from datetime import datetime
from docutils import nodes
import errno
import os
try:
import urllib2 as urllib
except ImportError:
import urllib.request as urllib
from lxml import html
VALIDATION_SPEC = "http://json-schema.org/latest/json-schema-validation.html"
def setup(app):
"""
Install the plugin.
:argument sphinx.application.Sphinx app: the Sphinx application context
"""
app.add_config_value("cache_path", "_cache", "")
try:
os.makedirs(app.config.cache_path)
except OSError as error:
if error.errno != errno.EEXIST:
raise
path = os.path.join(app.config.cache_path, "spec.html")
spec = fetch_or_load(path)
app.add_role("validator", docutils_sucks(spec))
def fetch_or_load(spec_path):
"""
Fetch a new specification or use the cache if it's current.
:argument cache_path: the path to a cached specification
"""
headers = {}
try:
modified = datetime.utcfromtimestamp(os.path.getmtime(spec_path))
date = modified.strftime("%a, %d %b %Y %I:%M:%S UTC")
headers["If-Modified-Since"] = date
except OSError as error:
if error.errno != errno.ENOENT:
raise
request = urllib.Request(VALIDATION_SPEC, headers=headers)
response = urllib.urlopen(request)
if response.code == 200:
with open(spec_path, "w+b") as spec:
spec.writelines(response)
spec.seek(0)
return html.parse(spec)
with open(spec_path) as spec:
return html.parse(spec)
def docutils_sucks(spec):
"""
Yeah.
It doesn't allow using a class because it does stupid stuff like try to set
attributes on the callable object rather than just keeping a dict.
"""
base_url = VALIDATION_SPEC
ref_url = "http://json-schema.org/latest/json-schema-core.html#anchor25"
schema_url = "http://json-schema.org/latest/json-schema-core.html#anchor22"
def validator(name, raw_text, text, lineno, inliner):
"""
Link to the JSON Schema documentation for a validator.
:argument str name: the name of the role in the document
:argument str raw_source: the raw text (role with argument)
:argument str text: the argument given to the role
:argument int lineno: the line number
:argument docutils.parsers.rst.states.Inliner inliner: the inliner
:returns: 2-tuple of nodes to insert into the document and an iterable
of system messages, both possibly empty
"""
if text == "$ref":
return [nodes.reference(raw_text, text, refuri=ref_url)], []
elif text == "$schema":
return [nodes.reference(raw_text, text, refuri=schema_url)], []
xpath = "//h3[re:match(text(), '(^|\W)\"?{0}\"?($|\W,)', 'i')]"
header = spec.xpath(
xpath.format(text),
namespaces={"re": "http://exslt.org/regular-expressions"},
)
if len(header) == 0:
inliner.reporter.warning(
"Didn't find a target for {0}".format(text),
)
uri = base_url
else:
if len(header) > 1:
inliner.reporter.info(
"Found multiple targets for {0}".format(text),
)
uri = base_url + "#" + header[0].getprevious().attrib["name"]
reference = nodes.reference(raw_text, text, refuri=uri)
return [reference], []
return validator
|
