From dd371a59de0a8730bab3b4e61f7718a7260fb0ef Mon Sep 17 00:00:00 2001
From: Takeshi KOMIYA <i.tkomiya@gmail.com>
Date: Fri, 4 Jan 2019 00:32:15 +0900
Subject: [PATCH] Move DirectoryHTMLBuilder to sphinx.builders.dirhtml package

---
 sphinx/application.py      |  1 +
 sphinx/builders/dirhtml.py | 68 ++++++++++++++++++++++++++++++++++++++
 sphinx/builders/html.py    | 36 ++------------------
 3 files changed, 71 insertions(+), 34 deletions(-)
 create mode 100644 sphinx/builders/dirhtml.py

diff --git a/sphinx/application.py b/sphinx/application.py
index 762b7f89c7..cce9926b53 100644
--- a/sphinx/application.py
+++ b/sphinx/application.py
@@ -64,6 +64,7 @@ builtin_extensions = (
     'sphinx.addnodes',
     'sphinx.builders.changes',
     'sphinx.builders.epub3',
+    'sphinx.builders.dirhtml',
     'sphinx.builders.dummy',
     'sphinx.builders.gettext',
     'sphinx.builders.html',
diff --git a/sphinx/builders/dirhtml.py b/sphinx/builders/dirhtml.py
new file mode 100644
index 0000000000..7ab6fad98a
--- /dev/null
+++ b/sphinx/builders/dirhtml.py
@@ -0,0 +1,68 @@
+"""
+    sphinx.builders.dirhtml
+    ~~~~~~~~~~~~~~~~~~~~~~~
+
+    Directory HTML builders.
+
+    :copyright: Copyright 2007-2019 by the Sphinx team, see AUTHORS.
+    :license: BSD, see LICENSE for details.
+"""
+
+from os import path
+
+from sphinx.builders.html import StandaloneHTMLBuilder
+from sphinx.util import logging
+from sphinx.util.osutil import SEP, os_path
+
+if False:
+    # For type annotation
+    from typing import Any, Dict, Set  # NOQA
+    from sphinx.application import Sphinx  # NOQA
+
+logger = logging.getLogger(__name__)
+
+
+class DirectoryHTMLBuilder(StandaloneHTMLBuilder):
+    """
+    A StandaloneHTMLBuilder that creates all HTML pages as "index.html" in
+    a directory given by their pagename, so that generated URLs don't have
+    ``.html`` in them.
+    """
+    name = 'dirhtml'
+
+    def get_target_uri(self, docname, typ=None):
+        # type: (str, str) -> str
+        if docname == 'index':
+            return ''
+        if docname.endswith(SEP + 'index'):
+            return docname[:-5]  # up to sep
+        return docname + SEP
+
+    def get_outfilename(self, pagename):
+        # type: (str) -> str
+        if pagename == 'index' or pagename.endswith(SEP + 'index'):
+            outfilename = path.join(self.outdir, os_path(pagename) +
+                                    self.out_suffix)
+        else:
+            outfilename = path.join(self.outdir, os_path(pagename),
+                                    'index' + self.out_suffix)
+
+        return outfilename
+
+    def prepare_writing(self, docnames):
+        # type: (Set[str]) -> None
+        super().prepare_writing(docnames)
+        self.globalcontext['no_search_suffix'] = True
+
+
+def setup(app):
+    # type: (Sphinx) -> Dict[str, Any]
+    app.setup_extension('sphinx.builders.html')
+
+    app.add_builder(DirectoryHTMLBuilder)
+
+    return {
+        'version': 'builtin',
+        'parallel_read_safe': True,
+        'parallel_write_safe': True,
+    }
diff --git a/sphinx/builders/html.py b/sphinx/builders/html.py
index 87b3ccac8b..09ba8d6778 100644
--- a/sphinx/builders/html.py
+++ b/sphinx/builders/html.py
@@ -1169,39 +1169,6 @@ class StandaloneHTMLBuilder(Builder):
         logger.info(__('done'))
 
 
-class DirectoryHTMLBuilder(StandaloneHTMLBuilder):
-    """
-    A StandaloneHTMLBuilder that creates all HTML pages as "index.html" in
-    a directory given by their pagename, so that generated URLs don't have
-    ``.html`` in them.
-    """
-    name = 'dirhtml'
-
-    def get_target_uri(self, docname, typ=None):
-        # type: (str, str) -> str
-        if docname == 'index':
-            return ''
-        if docname.endswith(SEP + 'index'):
-            return docname[:-5]  # up to sep
-        return docname + SEP
-
-    def get_outfilename(self, pagename):
-        # type: (str) -> str
-        if pagename == 'index' or pagename.endswith(SEP + 'index'):
-            outfilename = path.join(self.outdir, os_path(pagename) +
-                                    self.out_suffix)
-        else:
-            outfilename = path.join(self.outdir, os_path(pagename),
-                                    'index' + self.out_suffix)
-
-        return outfilename
-
-    def prepare_writing(self, docnames):
-        # type: (Set[str]) -> None
-        super().prepare_writing(docnames)
-        self.globalcontext['no_search_suffix'] = True
-
-
 class SerializingHTMLBuilder(StandaloneHTMLBuilder):
     """
     An abstract builder that serializes the generated HTML.
@@ -1417,10 +1384,12 @@ def validate_math_renderer(app):
 
 
 # for compatibility
+from sphinx.builders.dirhtml import DirectoryHTMLBuilder  # NOQA
 from sphinx.builders.singlehtml import SingleFileHTMLBuilder  # NOQA
 
 deprecated_alias('sphinx.builders.html',
                  {
+                     'DirectoryHTMLBuilder': DirectoryHTMLBuilder,
                      'SingleFileHTMLBuilder': SingleFileHTMLBuilder,
                  },
                  RemovedInSphinx40Warning)
@@ -1430,7 +1399,6 @@ def setup(app):
     # type: (Sphinx) -> Dict[str, Any]
     # builders
     app.add_builder(StandaloneHTMLBuilder)
-    app.add_builder(DirectoryHTMLBuilder)
     app.add_builder(PickleHTMLBuilder)
     app.add_builder(JSONHTMLBuilder)