Use event callbacks instead of subextensions

sphinx_github_style/__init__.py

@@ -17,8 +17,12 @@
 
 
 def setup(app: Sphinx) -> Dict[str, Any]:
+    app.setup_extension('sphinx.ext.linkcode')
     app.connect("builder-inited", add_static_path)
+    app.connect('doctree-resolved', add_linkcode_node_class)
+
     app.add_config_value('linkcode_blob', 'head', True)
+    app.add_config_value('linkcode_link_text', 'View on GitHub', 'html')
 
     linkcode_blob = get_conf_val(app, "linkcode_blob")
     linkcode_url = get_linkcode_url(
@@ -37,10 +41,9 @@ def setup(app: Sphinx) -> Dict[str, Any]:
         linkcode_func = get_linkcode_resolve(linkcode_url, repo_dir)
         set_conf_val(app, 'linkcode_resolve', linkcode_func)
 
-    app.setup_extension('sphinx_github_style.add_linkcode_class')
-    app.setup_extension('sphinx_github_style.github_style')
-    app.setup_extension('sphinx.ext.linkcode')
     app.add_lexer('python', GitHubLexer)
+    app.add_css_file('github_style.css')
+    app.config.pygments_style = 'sphinx_github_style.GitHubStyle'
 
     return {'version': sphinx.__display_version__, 'parallel_read_safe': True}
 

sphinx_github_style/add_linkcode_class.py

@@ -1,9 +1,7 @@
-import sphinx
 from sphinx.locale import _
 from sphinx.application import Sphinx
 from docutils.nodes import Node, Text
 from docutils import nodes
-from typing import Any, Dict
 
 
 def add_linkcode_node_class(app: Sphinx, doctree: Node, docname: str) -> None:
@@ -22,9 +20,3 @@ def add_linkcode_node_class(app: Sphinx, doctree: Node, docname: str) -> None:
             if node.parent.get('internal', None) is False:
                 node['classes'] = ['linkcode-link']
                 node.children = [Text(_(f'{link_text}'))]
-
-
-def setup(app: Sphinx) -> Dict[str, Any]:
-    app.connect('doctree-resolved', add_linkcode_node_class)
-    app.add_config_value('linkcode_link_text', 'View on GitHub', 'html')
-    return {'version': sphinx.__display_version__, 'parallel_read_safe': True}

sphinx_github_style/github_style.py

@@ -139,8 +139,3 @@ class GitHubStyle(Style):
         Text: pl["syntax-markup-bold"],
     }
 
-
-def setup(app):
-    app.config.pygments_style = 'sphinx_github_style.GitHubStyle'
-    app.add_css_file('github_style.css')
-    return {'version': sphinx.__display_version__, 'parallel_read_safe': True}