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|
# -*- coding: utf-8 -*-
"""
sphinx.ext.intersphinx
~~~~~~~~~~~~~~~~~~~~~~
Insert links to objects documented in remote Sphinx documentation.
This works as follows:
* Each Sphinx HTML build creates a file named "objects.inv" that contains a
mapping from object names to URIs relative to the HTML set's root.
* Projects using the Intersphinx extension can specify links to such mapping
files in the `intersphinx_mapping` config value. The mapping will then be
used to resolve otherwise missing references to objects into links to the
other documentation.
* By default, the mapping file is assumed to be at the same location as the
rest of the documentation; however, the location of the mapping file can
also be specified individually, e.g. if the docs should be buildable
without Internet access.
:copyright: Copyright 2007-2018 by the Sphinx team, see AUTHORS.
:license: BSD, see LICENSE for details.
"""
from __future__ import print_function
import functools
import posixpath
import sys
import time
import warnings
from os import path
from docutils import nodes
from docutils.utils import relative_path
from six import PY3, iteritems, string_types
from six.moves.urllib.parse import urlsplit, urlunsplit
import sphinx
from sphinx.builders.html import INVENTORY_FILENAME
from sphinx.deprecation import RemovedInSphinx20Warning
from sphinx.locale import _, __
from sphinx.util import requests, logging
from sphinx.util.inventory import InventoryFile
if False:
# For type annotation
from typing import Any, Dict, IO, List, Tuple, Union # NOQA
from sphinx.application import Sphinx # NOQA
from sphinx.config import Config # NOQA
from sphinx.environment import BuildEnvironment # NOQA
if PY3:
unicode = str
Inventory = Dict[unicode, Dict[unicode, Tuple[unicode, unicode, unicode, unicode]]]
logger = logging.getLogger(__name__)
class InventoryAdapter(object):
"""Inventory adapter for environment"""
def __init__(self, env):
# type: (BuildEnvironment) -> None
self.env = env
if not hasattr(env, 'intersphinx_cache'):
self.env.intersphinx_cache = {} # type: ignore
self.env.intersphinx_inventory = {} # type: ignore
self.env.intersphinx_named_inventory = {} # type: ignore
@property
def cache(self):
# type: () -> Dict[unicode, Tuple[unicode, int, Inventory]]
return self.env.intersphinx_cache # type: ignore
@property
def main_inventory(self):
# type: () -> Inventory
return self.env.intersphinx_inventory # type: ignore
@property
def named_inventory(self):
# type: () -> Dict[unicode, Inventory]
return self.env.intersphinx_named_inventory # type: ignore
def clear(self):
# type: () -> None
self.env.intersphinx_inventory.clear() # type: ignore
self.env.intersphinx_named_inventory.clear() # type: ignore
def _strip_basic_auth(url):
# type: (unicode) -> unicode
"""Returns *url* with basic auth credentials removed. Also returns the
basic auth username and password if they're present in *url*.
E.g.: https://user:pass@example.com => https://example.com
*url* need not include basic auth credentials.
:param url: url which may or may not contain basic auth credentials
:type url: ``str``
:return: *url* with any basic auth creds removed
:rtype: ``str``
"""
frags = list(urlsplit(url))
# swap out "user[:pass]@hostname" for "hostname"
if '@' in frags[1]:
frags[1] = frags[1].split('@')[1]
return urlunsplit(frags)
def _read_from_url(url, config=None):
# type: (unicode, Config) -> IO
"""Reads data from *url* with an HTTP *GET*.
This function supports fetching from resources which use basic HTTP auth as
laid out by RFC1738 § 3.1. See § 5 for grammar definitions for URLs.
.. seealso:
https://www.ietf.org/rfc/rfc1738.txt
:param url: URL of an HTTP resource
:type url: ``str``
:return: data read from resource described by *url*
:rtype: ``file``-like object
"""
r = requests.get(url, stream=True, config=config, timeout=config.intersphinx_timeout)
r.raise_for_status()
r.raw.url = r.url
# decode content-body based on the header.
# ref: https://github.com/kennethreitz/requests/issues/2155
r.raw.read = functools.partial(r.raw.read, decode_content=True)
return r.raw
def _get_safe_url(url):
# type: (unicode) -> unicode
"""Gets version of *url* with basic auth passwords obscured. This function
returns results suitable for printing and logging.
E.g.: https://user:12345@example.com => https://user@example.com
:param url: a url
:type url: ``str``
:return: *url* with password removed
:rtype: ``str``
"""
parts = urlsplit(url)
if parts.username is None:
return url
else:
frags = list(parts)
if parts.port:
frags[1] = '{0}@{1}:{2}'.format(parts.username, parts.hostname, parts.port)
else:
frags[1] = '{0}@{1}'.format(parts.username, parts.hostname)
return urlunsplit(frags)
def fetch_inventory(app, uri, inv):
# type: (Sphinx, unicode, Any) -> Any
"""Fetch, parse and return an intersphinx inventory file."""
# both *uri* (base URI of the links to generate) and *inv* (actual
# location of the inventory file) can be local or remote URIs
localuri = '://' not in uri
if not localuri:
# case: inv URI points to remote resource; strip any existing auth
uri = _strip_basic_auth(uri)
try:
if '://' in inv:
f = _read_from_url(inv, config=app.config)
else:
f = open(path.join(app.srcdir, inv), 'rb')
except Exception as err:
err.args = ('intersphinx inventory %r not fetchable due to %s: %s',
inv, err.__class__, err)
raise
try:
if hasattr(f, 'url'):
newinv = f.url # type: ignore
if inv != newinv:
logger.info('intersphinx inventory has moved: %s -> %s', inv, newinv)
if uri in (inv, path.dirname(inv), path.dirname(inv) + '/'):
uri = path.dirname(newinv)
with f:
try:
join = localuri and path.join or posixpath.join
invdata = InventoryFile.load(f, uri, join)
except ValueError as exc:
raise ValueError('unknown or unsupported inventory version: %r' % exc)
except Exception as err:
err.args = ('intersphinx inventory %r not readable due to %s: %s',
inv, err.__class__.__name__, err)
raise
else:
return invdata
def load_mappings(app):
# type: (Sphinx) -> None
"""Load all intersphinx mappings into the environment."""
now = int(time.time())
cache_time = now - app.config.intersphinx_cache_limit * 86400
inventories = InventoryAdapter(app.builder.env)
update = False
for key, value in iteritems(app.config.intersphinx_mapping):
name = None # type: unicode
uri = None # type: unicode
inv = None # type: Union[unicode, Tuple[unicode, ...]]
if isinstance(value, (list, tuple)):
# new format
name, (uri, inv) = key, value
if not isinstance(name, string_types):
logger.warning(__('intersphinx identifier %r is not string. Ignored'), name)
continue
else:
# old format, no name
name, uri, inv = None, key, value
# we can safely assume that the uri<->inv mapping is not changed
# during partial rebuilds since a changed intersphinx_mapping
# setting will cause a full environment reread
if not isinstance(inv, tuple):
invs = (inv, )
else:
invs = inv # type: ignore
failures = []
for inv in invs:
if not inv:
inv = posixpath.join(uri, INVENTORY_FILENAME)
# decide whether the inventory must be read: always read local
# files; remote ones only if the cache time is expired
if '://' not in inv or uri not in inventories.cache \
or inventories.cache[uri][1] < cache_time:
safe_inv_url = _get_safe_url(inv) # type: ignore
logger.info('loading intersphinx inventory from %s...', safe_inv_url)
try:
invdata = fetch_inventory(app, uri, inv)
except Exception as err:
failures.append(err.args)
continue
if invdata:
inventories.cache[uri] = (name, now, invdata)
update = True
break
if failures == []:
pass
elif len(failures) < len(invs):
logger.info("encountered some issues with some of the inventories,"
" but they had working alternatives:")
for fail in failures:
logger.info(*fail)
else:
logger.warning(__("failed to reach any of the inventories "
"with the following issues:"))
for fail in failures:
logger.warning(*fail)
if update:
inventories.clear()
# Duplicate values in different inventories will shadow each
# other; which one will override which can vary between builds
# since they are specified using an unordered dict. To make
# it more consistent, we sort the named inventories and then
# add the unnamed inventories last. This means that the
# unnamed inventories will shadow the named ones but the named
# ones can still be accessed when the name is specified.
cached_vals = list(inventories.cache.values())
named_vals = sorted(v for v in cached_vals if v[0])
unnamed_vals = [v for v in cached_vals if not v[0]]
for name, _x, invdata in named_vals + unnamed_vals:
if name:
inventories.named_inventory[name] = invdata
for type, objects in iteritems(invdata):
inventories.main_inventory.setdefault(type, {}).update(objects)
def missing_reference(app, env, node, contnode):
# type: (Sphinx, BuildEnvironment, nodes.Node, nodes.Node) -> None
"""Attempt to resolve a missing reference via intersphinx references."""
target = node['reftarget']
inventories = InventoryAdapter(env)
objtypes = None # type: List[unicode]
if node['reftype'] == 'any':
# we search anything!
objtypes = ['%s:%s' % (domain.name, objtype)
for domain in env.domains.values()
for objtype in domain.object_types]
domain = None
else:
domain = node.get('refdomain')
if not domain:
# only objects in domains are in the inventory
return
objtypes = env.get_domain(domain).objtypes_for_role(node['reftype'])
if not objtypes:
return
objtypes = ['%s:%s' % (domain, objtype) for objtype in objtypes]
if 'std:cmdoption' in objtypes:
# until Sphinx-1.6, cmdoptions are stored as std:option
objtypes.append('std:option')
to_try = [(inventories.main_inventory, target)]
if domain:
full_qualified_name = env.get_domain(domain).get_full_qualified_name(node)
if full_qualified_name:
to_try.append((inventories.main_inventory, full_qualified_name))
in_set = None
if ':' in target:
# first part may be the foreign doc set name
setname, newtarget = target.split(':', 1)
if setname in inventories.named_inventory:
in_set = setname
to_try.append((inventories.named_inventory[setname], newtarget))
if domain:
node['reftarget'] = newtarget
full_qualified_name = env.get_domain(domain).get_full_qualified_name(node)
if full_qualified_name:
to_try.append((inventories.named_inventory[setname], full_qualified_name))
for inventory, target in to_try:
for objtype in objtypes:
if objtype not in inventory or target not in inventory[objtype]:
continue
proj, version, uri, dispname = inventory[objtype][target]
if '://' not in uri and node.get('refdoc'):
# get correct path in case of subdirectories
uri = path.join(relative_path(node['refdoc'], '.'), uri)
if version:
reftitle = _('(in %s v%s)') % (proj, version)
else:
reftitle = _('(in %s)') % (proj,)
newnode = nodes.reference('', '', internal=False, refuri=uri, reftitle=reftitle)
if node.get('refexplicit'):
# use whatever title was given
newnode.append(contnode)
elif dispname == '-' or \
(domain == 'std' and node['reftype'] == 'keyword'):
# use whatever title was given, but strip prefix
title = contnode.astext()
if in_set and title.startswith(in_set + ':'):
newnode.append(contnode.__class__(title[len(in_set) + 1:],
title[len(in_set) + 1:]))
else:
newnode.append(contnode)
else:
# else use the given display name (used for :ref:)
newnode.append(contnode.__class__(dispname, dispname))
return newnode
# at least get rid of the ':' in the target if no explicit title given
if in_set is not None and not node.get('refexplicit', True):
if len(contnode) and isinstance(contnode[0], nodes.Text):
contnode[0] = nodes.Text(newtarget, contnode[0].rawsource)
def setup(app):
# type: (Sphinx) -> Dict[unicode, Any]
app.add_config_value('intersphinx_mapping', {}, True)
app.add_config_value('intersphinx_cache_limit', 5, False)
app.add_config_value('intersphinx_timeout', None, False)
app.connect('missing-reference', missing_reference)
app.connect('builder-inited', load_mappings)
return {
'version': sphinx.__display_version__,
'env_version': 1,
'parallel_read_safe': True
}
def debug(argv):
# type: (List[unicode]) -> None
"""Debug functionality to print out an inventory"""
warnings.warn('sphinx.ext.intersphinx.debug() is deprecated. '
'Please use inspect_main() instead',
RemovedInSphinx20Warning)
inspect_main(argv[1:])
def inspect_main(argv):
# type: (List[unicode]) -> None
"""Debug functionality to print out an inventory"""
if len(argv) < 1:
print("Print out an inventory file.\n"
"Error: must specify local path or URL to an inventory file.",
file=sys.stderr)
sys.exit(1)
class MockConfig(object):
intersphinx_timeout = None # type: int
tls_verify = False
class MockApp(object):
srcdir = ''
config = MockConfig()
def warn(self, msg):
# type: (unicode) -> None
print(msg, file=sys.stderr)
try:
filename = argv[0]
invdata = fetch_inventory(MockApp(), '', filename) # type: ignore
for key in sorted(invdata or {}):
print(key)
for entry, einfo in sorted(invdata[key].items()):
print('\t%-40s %s%s' % (entry,
einfo[3] != '-' and '%-40s: ' % einfo[3] or '',
einfo[2]))
except ValueError as exc:
print(exc.args[0] % exc.args[1:])
except Exception as exc:
print('Unknown error: %r' % exc)
if __name__ == '__main__':
import logging # type: ignore
logging.basicConfig()
inspect_main(argv=sys.argv[1:]) # type: ignore
|