Fix #7095: dirhtml: Cross references are broken via intersphinx and :doc:

CHANGES

@@ -83,6 +83,7 @@ Bugs fixed
 * #6889: autodoc: Trailing comma in ``:members::`` option causes cryptic warning
 * #7055: linkcheck: redirect is treated as an error
 * #7090: std domain: Can't assign numfig-numbers for custom container nodes
+* #7095: dirhtml: Cross references are broken via intersphinx and ``:doc:`` role
 
 Testing
 --------

sphinx/util/inventory.py

@@ -122,7 +122,7 @@ class InventoryFile:
 
         for line in stream.read_compressed_lines():
             # be careful to handle names with embedded spaces correctly
-            m = re.match(r'(?x)(.+?)\s+(\S*:\S*)\s+(-?\d+)\s+(\S+)\s+(.*)',
+            m = re.match(r'(?x)(.+?)\s+(\S*:\S*)\s+(-?\d+)\s+?(\S*)\s+(.*)',
                          line.rstrip())
             if not m:
                 continue

tests/roots/test-builder-dirhtml/bar.rst

@@ -0,0 +1,4 @@
+.. _bar:
+
+bar
+===

tests/roots/test-builder-dirhtml/foo/foo_1.rst

@@ -0,0 +1,4 @@
+.. _foo_1:
+
+foo/foo_1
+=========

tests/roots/test-builder-dirhtml/foo/foo_2.rst

@@ -0,0 +1,4 @@
+.. _foo_2:
+
+foo/foo_2
+=========

tests/roots/test-builder-dirhtml/foo/index.rst

@@ -0,0 +1,9 @@
+.. _foo:
+
+foo/index
+=========
+
+.. toctree::
+
+   foo_1
+   foo_2

tests/roots/test-builder-dirhtml/index.rst

@@ -0,0 +1,9 @@
+.. _index:
+
+index
+=====
+
+.. toctree::
+
+   foo/index
+   bar

tests/test_build_dirhtml.py

@@ -0,0 +1,47 @@
+"""
+    test_build_dirhtml
+    ~~~~~~~~~~~~~~~~~~
+
+    Test dirhtml builder.
+
+    :copyright: Copyright 2007-2020 by the Sphinx team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+import posixpath
+
+import pytest
+
+from sphinx.util.inventory import InventoryFile
+
+
+@pytest.mark.sphinx(buildername='dirhtml', testroot='builder-dirhtml')
+def test_dirhtml(app, status, warning):
+    app.build()
+
+    assert (app.outdir / 'index.html').exists()
+    assert (app.outdir / 'foo/index.html').exists()
+    assert (app.outdir / 'foo/foo_1/index.html').exists()
+    assert (app.outdir / 'foo/foo_2/index.html').exists()
+    assert (app.outdir / 'bar/index.html').exists()
+
+    content = (app.outdir / 'index.html').text()
+    assert 'href="foo/"' in content
+    assert 'href="foo/foo_1/"' in content
+    assert 'href="foo/foo_2/"' in content
+    assert 'href="bar/"' in content
+
+    # objects.inv (refs: #7095)
+    f = (app.outdir / 'objects.inv').open('rb')
+    invdata = InventoryFile.load(f, 'path/to', posixpath.join)
+    assert 'index' in invdata.get('std:doc')
+    assert ('Python', '', 'path/to/', '-') == invdata['std:doc']['index']
+
+    assert 'foo/index' in invdata.get('std:doc')
+    assert ('Python', '', 'path/to/foo/', '-') == invdata['std:doc']['foo/index']
+
+    assert 'index' in invdata.get('std:label')
+    assert ('Python', '', 'path/to/#index', '-') == invdata['std:label']['index']
+
+    assert 'foo' in invdata.get('std:label')
+    assert ('Python', '', 'path/to/foo/#foo', 'foo/index') == invdata['std:label']['foo']