fix: invalidate cache on code update

solara/__main__.py

@@ -595,7 +595,7 @@ def staticbuild():
     include_nbextensions = True
     if include_nbextensions:
         directories = solara.server.server.get_nbextensions_directories()
-        nbextensions = solara.server.server.get_nbextensions()
+        nbextensions, ignore = solara.server.server.get_nbextensions()
         for name in nbextensions:
             for directory in directories:
                 if (directory / (name + ".js")).exists():

solara/server/server.py

@@ -5,7 +5,7 @@
 import sys
 import time
 from pathlib import Path
-from typing import Dict, List, Optional, TypeVar
+from typing import Dict, List, Optional, Tuple, TypeVar
 
 import ipykernel
 import ipyvue
@@ -262,9 +262,9 @@ def read_root(path: str, root_path: str = "", render_kwargs={}, use_nbextensions
     if not router.possible_match:
         return None
     if use_nbextensions:
-        nbextensions = get_nbextensions()
+        nbextensions, nbextensions_hashes = get_nbextensions()
     else:
-        nbextensions = []
+        nbextensions, nbextensions_hashes = [], {}
 
     from markupsafe import Markup
 
@@ -328,6 +328,7 @@ def include_js(path: str, module=False) -> Markup:
     resources = {
         "theme": "light",
         "nbextensions": nbextensions,
+        "nbextensions_hashes": nbextensions_hashes,
         "include_css": include_css,
         "include_js": include_js,
     }
@@ -397,7 +398,7 @@ def get_nbextensions_directories() -> List[Path]:
 
 
 @solara.memoize(storage=cache_memory)
-def get_nbextensions() -> List[str]:
+def get_nbextensions() -> Tuple[List[str], Dict[str, Optional[str]]]:
     from jupyter_core.paths import jupyter_config_path
 
     paths = [Path(p) / "nbconfig" for p in jupyter_config_path()]
@@ -411,8 +412,15 @@ def exists(name):
         logger.info(f"nbextension {name} not found")
         return False
 
-    nbextensions = [name for name, enabled in load_extensions.items() if enabled and (name not in nbextensions_ignorelist) and exists(name)]
-    return nbextensions
+    def hash_file(name):
+        for directory in nbextensions_directories:
+            if (directory / (name + ".js")).exists():
+                return solara.util.get_file_hash(directory / (name + ".js"))[1]
+        return None
+
+    nbextensions: List[str] = [name for name, enabled in load_extensions.items() if enabled and (name not in nbextensions_ignorelist) and exists(name)]
+    nbextensions_hashes = {name: hash_file(name) for name in nbextensions}
+    return nbextensions, nbextensions_hashes
 
 
 nbextensions_directories = get_nbextensions_directories()

solara/server/templates/solara.html.j2

@@ -379,6 +379,7 @@
         {% if 'jupyter-vuetify/extension' in resources.nbextensions -%}
         window.enable_nbextensions = true;
         {% endif -%}
+        nbextensionHashes = {{ resources.nbextensions_hashes | tojson | safe }};
         requirejs.config({
             baseUrl: '{{root_path}}/static/',
             waitSeconds: 3000,
@@ -391,7 +392,16 @@
         'jupyter-vuetify': 'nbextensions/jupyter-vuetify/nodeps',
             {% endif -%}
                     },
-                }
+                },
+                urlArgs: function (id, url) {
+                    id = id.replace("/static/nbextensions/", "").replace(".js", "");
+                    if (nbextensionHashes[id] !== undefined) {
+                        console.log('nbextensionHashes', id, nbextensionHashes[id]);
+                        return (url.indexOf('?') === -1 ? '?' : '&') + nbextensionHashes[id];
+                    } else {
+                        return '';
+                    }
+                },
             });
         requirejs([
             {% for ext in resources.nbextensions if ext != 'jupyter-vuetify/extension' and ext != 'jupyter-vue/extension' -%}