fix: prevent init if local files belong to other app (#13954)

Author: sobolk

packages/amplify-cli/src/commands/init.ts

@@ -1,4 +1,4 @@
-import { $TSContext, LocalEnvInfo } from '@aws-amplify/amplify-cli-core';
+import { $TSContext, AmplifyError, LocalEnvInfo, stateManager } from '@aws-amplify/amplify-cli-core';
 import { constructInputParams } from '../amplify-service-helper';
 import { Context } from '../domain/context';
 import { raisePostEnvAddEvent } from '../execution-manager';
@@ -10,6 +10,7 @@ import { initProviders } from '../init-steps/s2-initProviders';
 import { scaffoldProjectHeadless } from '../init-steps/s8-scaffoldHeadless';
 import { onHeadlessSuccess, onSuccess } from '../init-steps/s9-onSuccess';
 import { checkForNestedProject } from './helpers/projectUtils';
+import { getAmplifyAppId } from '../extensions/amplify-helpers/get-amplify-appId';
 
 const constructExeInfo = (context: $TSContext): void => {
   context.exeInfo = {
@@ -32,6 +33,18 @@ export const run = async (context: $TSContext): Promise<void> => {
   constructExeInfo(context);
   checkForNestedProject();
 
+  const projectPath = process.cwd();
+  if (stateManager.metaFileExists(projectPath)) {
+    const inputAppId = context.exeInfo?.inputParams?.amplify?.appId;
+    const appId = getAmplifyAppId();
+    if (inputAppId && appId && inputAppId !== appId) {
+      throw new AmplifyError('InvalidAmplifyAppIdError', {
+        message: `Amplify appId mismatch.`,
+        resolution: `You are currently working in the amplify project with Id ${appId}`,
+      });
+    }
+  }
+
   const steps = runStrategy(!!context?.parameters?.options?.quickstart);
   for (const step of steps) {
     await step(context);