Fix: Ensure parent ID is saved in .clasp.json

Author: sqrrrl

src/core/clasp.ts

@@ -131,7 +131,7 @@ export async function initClaspInstance(options: InitOptions): Promise<Clasp> {
     project: {
       scriptId: config.scriptId,
       projectId: config.projectId,
-      parentId: config.parentId,
+      parentId: firstValue(config.parentId),
     },
   });
 }
@@ -245,3 +245,10 @@ async function hasReadAccess(path: string): Promise<boolean> {
   }
   return true;
 }
+
+function firstValue<T>(values: T | T[] | undefined): T | undefined {
+  if (Array.isArray(values) && values.length > 0) {
+    return values[0];
+  }
+  return values as T | undefined;
+}

src/core/project.ts

@@ -316,6 +316,7 @@ export class Project {
     const settings = {
       scriptId: this.options.project.scriptId,
       rootDir: srcDir,
+      parentId: this.options.project.parentId,
       projectId: this.options.project.projectId,
       scriptExtensions: this.options.files.fileExtensions['SERVER_JS'],
       htmlExtensions: this.options.files.fileExtensions['HTML'],