Fix #8936: LaTeX: A custom LaTeX builder fails with unknown node error

At present, post transform components for LaTeX builder does not work
for the custom LaTeX builder that inherits the original LaTeX builder.
This allows them working with the custom LaTeX builders.

CHANGES

@@ -16,6 +16,8 @@ Features added
 Bugs fixed
 ----------
 
+* #8936: LaTeX: A custom LaTeX builder fails with unknown node error
+
 Testing
 --------
 

sphinx/builders/latex/transforms.py

@@ -42,7 +42,7 @@ class SubstitutionDefinitionsRemover(SphinxPostTransform):
 
     # should be invoked after Substitutions process
     default_priority = Substitutions.default_priority + 1
-    builders = ('latex',)
+    formats = ('latex',)
 
     def run(self, **kwargs: Any) -> None:
         for node in self.document.traverse(nodes.substitution_definition):
@@ -57,7 +57,7 @@ class ShowUrlsTransform(SphinxPostTransform):
     .. note:: This transform is used for integrated doctree
     """
     default_priority = 400
-    builders = ('latex',)
+    formats = ('latex',)
 
     # references are expanded to footnotes (or not)
     expanded = False
@@ -345,7 +345,7 @@ class LaTeXFootnoteTransform(SphinxPostTransform):
     """
 
     default_priority = 600
-    builders = ('latex',)
+    formats = ('latex',)
 
     def run(self, **kwargs: Any) -> None:
         footnotes = list(self.document.traverse(nodes.footnote))
@@ -497,7 +497,7 @@ class BibliographyTransform(SphinxPostTransform):
                     ...
     """
     default_priority = 750
-    builders = ('latex',)
+    formats = ('latex',)
 
     def run(self, **kwargs: Any) -> None:
         citations = thebibliography()
@@ -516,7 +516,7 @@ class CitationReferenceTransform(SphinxPostTransform):
     pending_xref nodes to citation_reference.
     """
     default_priority = 5  # before ReferencesResolver
-    builders = ('latex',)
+    formats = ('latex',)
 
     def run(self, **kwargs: Any) -> None:
         domain = cast(CitationDomain, self.env.get_domain('citation'))
@@ -536,7 +536,7 @@ class MathReferenceTransform(SphinxPostTransform):
     nodes to math_reference.
     """
     default_priority = 5  # before ReferencesResolver
-    builders = ('latex',)
+    formats = ('latex',)
 
     def run(self, **kwargs: Any) -> None:
         equations = self.env.get_domain('math').data['objects']
@@ -551,7 +551,7 @@ def run(self, **kwargs: Any) -> None:
 class LiteralBlockTransform(SphinxPostTransform):
     """Replace container nodes for literal_block by captioned_literal_block."""
     default_priority = 400
-    builders = ('latex',)
+    formats = ('latex',)
 
     def run(self, **kwargs: Any) -> None:
         matcher = NodeMatcher(nodes.container, literal_block=True)
@@ -563,7 +563,7 @@ def run(self, **kwargs: Any) -> None:
 class DocumentTargetTransform(SphinxPostTransform):
     """Add :doc label to the first section of each document."""
     default_priority = 400
-    builders = ('latex',)
+    formats = ('latex',)
 
     def run(self, **kwargs: Any) -> None:
         for node in self.document.traverse(addnodes.start_of_file):
@@ -599,7 +599,7 @@ class IndexInSectionTitleTransform(SphinxPostTransform):
             ...
     """
     default_priority = 400
-    builders = ('latex',)
+    formats = ('latex',)
 
     def run(self, **kwargs: Any) -> None:
         for node in self.document.traverse(nodes.title):