From: Andrey Rakhmatullin <wrar@debian.org>
Date: Sat, 20 Apr 2024 23:02:04 +0500
Subject: Use local intersphinx files.

---
 docs/conf.py | 114 ++++++++++++++++++++++++++++++++++++++++++++++++++---------
 1 file changed, 98 insertions(+), 16 deletions(-)

diff --git a/docs/conf.py b/docs/conf.py
index 1167ce0..3d4d5e8 100644
--- a/docs/conf.py
+++ b/docs/conf.py
@@ -141,22 +141,104 @@ coverage_ignore_pyobjects = [
 # -- Options for the InterSphinx extension -----------------------------------
 # https://www.sphinx-doc.org/en/master/usage/extensions/intersphinx.html#configuration
 
-intersphinx_mapping = {
-    "attrs": ("https://www.attrs.org/en/stable/", None),
-    "coverage": ("https://coverage.readthedocs.io/en/latest", None),
-    "cryptography": ("https://cryptography.io/en/latest/", None),
-    "cssselect": ("https://cssselect.readthedocs.io/en/latest", None),
-    "itemloaders": ("https://itemloaders.readthedocs.io/en/latest/", None),
-    "parsel": ("https://parsel.readthedocs.io/en/latest/", None),
-    "pytest": ("https://docs.pytest.org/en/latest", None),
-    "python": ("https://docs.python.org/3", None),
-    "sphinx": ("https://www.sphinx-doc.org/en/master", None),
-    "tox": ("https://tox.wiki/en/latest/", None),
-    "twisted": ("https://docs.twisted.org/en/stable/", None),
-    "twistedapi": ("https://docs.twisted.org/en/stable/api/", None),
-    "w3lib": ("https://w3lib.readthedocs.io/en/latest", None),
-}
-intersphinx_disabled_reftypes: Sequence[str] = []
+
+def check_object_path(key, url, path):
+    if os.path.isfile(path):
+        return {key: (url, path)}
+    return {}
+
+
+intersphinx_mapping = {}
+intersphinx_mapping.update(
+    check_object_path(
+        "attrs",
+        "https://www.attrs.org/en/stable/",
+        "/usr/share/doc/python-attr-doc/html/objects.inv",
+    )
+)
+intersphinx_mapping.update(
+    check_object_path(
+        "coverage",
+        "https://coverage.readthedocs.org/en/latest/",
+        "/usr/share/doc/python-coverage-doc/html/objects.inv",
+    )
+)
+intersphinx_mapping.update(
+    check_object_path(
+        "cryptography",
+        "https://cryptography.io/en/latest/",
+        "/usr/share/doc/python-cryptography-doc/html/objects.inv",
+    )
+)
+intersphinx_mapping.update(
+   check_object_path(
+       "cssselect",
+       "https://cssselect.readthedocs.org/en/latest/",
+       "/usr/share/doc/python-cssselect-doc/html/objects.inv",
+   )
+)
+intersphinx_mapping.update(
+    check_object_path(
+        "itemloaders",
+        "https://itemloaders.readthedocs.org/en/latest/",
+        "/usr/share/doc/python-itemloaders-doc/html/objects.inv",
+    )
+)
+intersphinx_mapping.update(
+    check_object_path(
+        "parsel",
+        "https://parsel.readthedocs.org/en/latest/",
+        "/usr/share/doc/python-parsel-doc/html/objects.inv",
+    )
+)
+intersphinx_mapping.update(
+    check_object_path(
+        "pytest",
+        "https://docs.pytest.org/en/latest",
+        "/usr/share/doc/python-pytest-doc/html/objects.inv",
+    )
+)
+intersphinx_mapping.update(
+    check_object_path(
+        "python",
+        "https://docs.python.org/3",
+        "/usr/share/doc/python%d.%d/html/objects.inv" % sys.version_info[:2],
+    )
+)
+intersphinx_mapping.update(
+    check_object_path(
+        "sphinx",
+        "https://www.sphinx-doc.org/en/master",
+        "/usr/share/doc/sphinx-doc/html/objects.inv",
+    )
+)
+intersphinx_mapping.update(
+    check_object_path(
+        "tox", "https://tox.wiki/en/latest/", "/usr/share/doc/tox/html/objects.inv"
+    )
+)
+intersphinx_mapping.update(
+    check_object_path(
+        "twisted",
+        "https://docs.twisted.org/en/stable/",
+        "/usr/share/doc/twisted-doc/html/objects.inv",
+    )
+)
+intersphinx_mapping.update(
+    check_object_path(
+        "twistedapi",
+        "https://docs.twisted.org/en/stable/api",
+        "/usr/share/doc/twisted-doc/html/api/objects.inv",
+    )
+)
+intersphinx_mapping.update(
+    check_object_path(
+        "w3lib",
+        "https://w3lib.readthedocs.org/en/latest/",
+        "/usr/share/doc/python-w3lib-doc/html/objects.inv",
+    )
+)
+intersphinx_disabled_reftypes = []
 
 
 # -- Options for sphinx-hoverxref extension ----------------------------------