Deprecate Parser.set_application()

CHANGES.rst

@@ -14,6 +14,10 @@ Deprecated
   including ``builder.app``, ``env.app``, ``events.app``,
   and ``SphinxTransform.`app``.
   Patch by Adam Turner.
+* #13637: Deprecate the :py:meth:`!set_application` method
+  of :py:class:`~sphinx.parsers.Parser` objects.
+  Sphinx now directly sets the :py:attr:`!config` and :py:attr:`!env` attributes.
+  Patch by Adam Turner.
 
 Features added
 --------------

sphinx/parsers.py

@@ -10,6 +10,7 @@
 from docutils.statemachine import StringList
 from docutils.transforms.universal import SmartQuotes
 
+from sphinx.deprecation import _deprecation_warning
 from sphinx.util.rst import append_epilog, prepend_prolog
 
 if TYPE_CHECKING:
@@ -44,7 +45,9 @@ def set_application(self, app: Sphinx) -> None:
 
         :param sphinx.application.Sphinx app: Sphinx application object
         """
-        self._app = app
+        cls_module = self.__class__.__module__
+        cls_name = self.__class__.__qualname__
+        _deprecation_warning(cls_module, f'{cls_name}.set_application', remove=(10, 0))
         self.config = app.config
         self.env = app.env
 

sphinx/registry.py

@@ -379,7 +379,8 @@ def create_source_parser(self, app: Sphinx, filename: str) -> Parser:
         parser_class = self.get_source_parser(filename)
         parser = parser_class()
         if isinstance(parser, SphinxParser):
-            parser.set_application(app)
+            parser.config = app.config
+            parser.env = app.env
         return parser
 
     def add_translator(

sphinx/testing/restructuredtext.py

@@ -22,7 +22,8 @@ def parse(app: Sphinx, text: str, docname: str = 'index') -> nodes.document:
         reader = SphinxStandaloneReader()
         reader.setup(app)
         parser = RSTParser()
-        parser.set_application(app)
+        parser.config = app.config
+        parser.env = app.env
         with sphinx_domains(env):
             return publish_doctree(
                 text,

tests/test_markup/test_parser.py

@@ -16,7 +16,8 @@ def test_RSTParser_prolog_epilog(RSTStateMachine, app):
     document = new_document('dummy.rst')
     document.settings = Mock(tab_width=8, language_code='')
     parser = RSTParser()
-    parser.set_application(app)
+    parser.config = app.config
+    parser.env = app.env
 
     # normal case
     text = 'hello Sphinx world\nSphinx is a document generator'