feat: improve NodeCG runtime installation and relaunch behavior

src/main/nodecg/runtime-provisioner.ts

@@ -28,6 +28,11 @@ type RuntimeProvisionerDeps = {
   writeFileSync: (filePath: string, content: string) => unknown;
 };
 
+export type PreparedNodecgRuntime = {
+  runtimePath: string;
+  installed: boolean;
+};
+
 type RuntimeManifest = {
   appVersion?: unknown;
   bundleName?: unknown;
@@ -47,14 +52,16 @@ export function prepareUserNodecgRuntime({
   bundleName,
   log,
   deps,
-}: RuntimeProvisionerConfig): string {
+}: RuntimeProvisionerConfig): PreparedNodecgRuntime {
   const resolvedDeps = resolveDeps(deps);
   const targetRuntimePath = path.join(userDataPath, "nodecg");
 
   validateSourceRuntime(sourceRuntimePath, bundleName, resolvedDeps.existsSync);
   resolvedDeps.mkdirSync(targetRuntimePath, { recursive: true });
 
-  if (shouldInstallRuntime(sourceRuntimePath, targetRuntimePath, appVersion, bundleName, resolvedDeps)) {
+  const installed = shouldInstallRuntime(sourceRuntimePath, targetRuntimePath, appVersion, bundleName, resolvedDeps);
+
+  if (installed) {
     log(`Installing managed NodeCG runtime into ${targetRuntimePath}`);
     installManagedRuntime(sourceRuntimePath, targetRuntimePath, appVersion, bundleName, resolvedDeps);
   }
@@ -63,7 +70,7 @@ export function prepareUserNodecgRuntime({
     resolvedDeps.mkdirSync(path.join(targetRuntimePath, writableDir), { recursive: true });
   }
 
-  return targetRuntimePath;
+  return { runtimePath: targetRuntimePath, installed };
 }
 
 function resolveDeps(deps?: Partial<RuntimeProvisionerDeps>): RuntimeProvisionerDeps {
@@ -166,7 +173,10 @@ function installManagedRuntime(
   );
 }
 
-function readJson(filePath: string, deps: Pick<RuntimeProvisionerDeps, "existsSync" | "readFileSync">): RuntimeManifest | null {
+function readJson(
+  filePath: string,
+  deps: Pick<RuntimeProvisionerDeps, "existsSync" | "readFileSync">,
+): RuntimeManifest | null {
   if (!deps.existsSync(filePath)) {
     return null;
   }