Add jupyterlite_contents config

Author: martinRenou

src/jupyterlite_sphinx.py

@@ -161,7 +161,10 @@ def run(self):
 
             # Copy the Notebook for RetroLite to find
             os.makedirs(os.path.dirname(notebooks_dir), exist_ok=True)
-            shutil.copyfile(notebook, str(notebooks_dir))
+            try:
+                shutil.copyfile(notebook, str(notebooks_dir))
+            except shutil.SameFileError:
+                pass
         else:
             notebook_name = None
 
@@ -214,6 +217,11 @@ def jupyterlite_build(app: Sphinx, error):
         if app.env.config.jupyterlite_config:
             config = ["--config", app.env.config.jupyterlite_config]
 
+        contents = []
+        if app.env.config.jupyterlite_contents:
+            for content in app.env.config.jupyterlite_contents:
+                contents.extend(["--contents", content])
+
         with tempfile.TemporaryDirectory() as tmp_dir:
             subprocess.check_output(
                 [
@@ -222,6 +230,7 @@ def jupyterlite_build(app: Sphinx, error):
                     "build",
                     "--debug",
                     *config,
+                    *contents,
                     "--lite-dir",
                     tmp_dir,
                     "--contents",
@@ -248,6 +257,7 @@ def setup(app):
 
     # Config options
     app.add_config_value("jupyterlite_config", None, rebuild="html")
+    app.add_config_value("jupyterlite_contents", None, rebuild="html")
 
     # Initialize RetroLite and JupyterLite directives
     app.add_node(