[MERGE] Forward-port of branch 12.0 to 13.0

extensions/autodoc_placeholder/__init__.py

@@ -21,6 +21,6 @@ def setup(app):
     directives.register_directive('autoattribute', PlaceHolder)
 
     return {
-        'parallel_read_safe': False,
+        'parallel_read_safe': True,
         'parallel_write_safe': True
     }

extensions/embedded_video/__init__.py

@@ -66,6 +66,6 @@ def setup(app):
     directives.register_directive('vimeo', Vimeo)
 
     return {
-        'parallel_read_safe': False,
+        'parallel_read_safe': True,
         'parallel_write_safe': True
     }

extensions/exercise_admonition/__init__.py

@@ -21,7 +21,7 @@ def setup(app):
     ))
 
     return {
-        'parallel_read_safe': False,
+        'parallel_read_safe': True,
         'parallel_write_safe': True
     }
 

extensions/github_link/__init__.py

@@ -75,7 +75,7 @@ def setup(app):
     app.config.linkcode_resolve = linkcode_resolve
 
     return {
-        'parallel_read_safe': False,
+        'parallel_read_safe': True,
         'parallel_write_safe': True
     }
 

extensions/html_domain/__init__.py

@@ -40,7 +40,7 @@ def setup(app):
         addnode(app, node, name)
 
     return {
-        'parallel_read_safe': False,
+        'parallel_read_safe': True,
         'parallel_write_safe': True
     }
 
@@ -183,3 +183,11 @@ class HtmlDomain(Domain):
         'var': makerole(var),
         'samp': makerole(samp),
     }
+
+    def merge_domaindata(self, docnames, otherdata) -> None:
+        """Merge in data regarding *docnames* from a different domaindata
+        inventory (coming from a subprocess in parallel builds).
+        """
+        # This extension doesn't store any data on the env
+        # and therefore doesn't need to support this method.
+        pass

extensions/odoo_theme/__init__.py

@@ -16,7 +16,7 @@ def setup(app):
     app.add_js_file('js/page_toc.js')
 
     return {
-        'parallel_read_safe': False,
+        'parallel_read_safe': True,
         'parallel_write_safe': True
     }
 

extensions/redirects/__init__.py

@@ -64,6 +64,6 @@ def setup(app):
     app.connect('builder-inited', generate_redirects)
 
     return {
-        'parallel_read_safe': False,
+        'parallel_read_safe': True,
         'parallel_write_safe': True
     }

extensions/switcher/__init__.py

@@ -13,7 +13,7 @@ def setup(app):
     app.connect('env-updated', add_statics)
 
     return {
-        'parallel_read_safe': False,
+        'parallel_read_safe': True,
         'parallel_write_safe': True
     }