Enhance application controller and runtime provisioner with loading window visibility and improved file handling

src/main/nodecg/runtime-provisioner.ts

@@ -23,11 +23,13 @@ type RuntimeProvisionerDeps = {
       recursive: true;
       force: true;
       dereference: true;
-      filter: (sourcePath: string) => boolean;
+      filter?: (sourcePath: string) => boolean;
     },
   ) => unknown;
   readFileSync: (filePath: string) => string | Buffer;
   writeFileSync: (filePath: string, content: string) => unknown;
+  statSync: (filePath: string) => { isDirectory: () => boolean };
+  symlinkSync: (target: string, path: string, type: "junction") => unknown;
 };
 
 export type PreparedNodecgRuntime = {
@@ -84,6 +86,8 @@ function resolveDeps(deps?: Partial<RuntimeProvisionerDeps>): RuntimeProvisioner
     cpSync: deps?.cpSync ?? fs.cpSync,
     readFileSync: deps?.readFileSync ?? fs.readFileSync,
     writeFileSync: deps?.writeFileSync ?? fs.writeFileSync,
+    statSync: deps?.statSync ?? fs.statSync,
+    symlinkSync: deps?.symlinkSync ?? fs.symlinkSync,
   };
 }
 
@@ -150,16 +154,20 @@ function installManagedRuntime(
     deps.rmSync(path.join(targetRuntimePath, entry), { recursive: true, force: true });
   }
 
-  deps.cpSync(sourceRuntimePath, targetRuntimePath, {
-    recursive: true,
-    force: true,
-    dereference: true,
-    filter: (sourcePath) => {
-      const relativePath = path.relative(sourceRuntimePath, sourcePath);
-      const firstSegment = relativePath.split(path.sep)[0];
-      return !WRITABLE_NODECG_DIRS.includes(firstSegment as (typeof WRITABLE_NODECG_DIRS)[number]);
-    },
-  });
+  for (const entry of MANAGED_RUNTIME_ENTRIES) {
+    const sourcePath = path.join(sourceRuntimePath, entry);
+    const targetPath = path.join(targetRuntimePath, entry);
+
+    if (!deps.existsSync(sourcePath)) {
+      continue;
+    }
+
+    if (deps.statSync(sourcePath).isDirectory()) {
+      deps.symlinkSync(sourcePath, targetPath, "junction");
+    } else {
+      deps.cpSync(sourcePath, targetPath, { recursive: true, force: true, dereference: true });
+    }
+  }
 
   const sourceRuntime = readJson(path.join(sourceRuntimePath, ".scoreko-runtime.json"), deps);
   deps.writeFileSync(