fix(appbuilder): misleading placeholder message #6010

## Problem
I was working on a CDK project, and after synthesizing my CDK template,
I noticed that the app-builder is showing a misleading notification to
customers: No IaC templates found in the workspace. This seems
incorrect, as I do have IaC templates in the workspace, including both
raw and synthesized CDK templates.

While I understand the intention behind the message, it needs to be more
precise to avoid confusion. I suggest we roll it back to something more
accurate, like No SAM templates found in the workspace, to clearly
indicate the specific missing template type.

## Solution
Solution is to change all instance where IAC is mentioned to the
customer to SAM, we would roll back to IaC once we start support CDK.

Remove redundant Logic.

Author: jonife

packages/core/src/awsService/appBuilder/explorer/nodes/appNode.ts

@@ -17,7 +17,6 @@ import { getSamCliContext } from '../../../../shared/sam/cli/samCliContext'
 import { SamCliListResourcesParameters } from '../../../../shared/sam/cli/samCliListResources'
 import { getDeployedResources, StackResource } from '../../../../lambda/commands/listSamResources'
 import * as path from 'path'
-import fs from '../../../../shared/fs/fs'
 import { generateStackNode } from './deployedStack'
 
 export class AppNode implements TreeNode {
@@ -61,19 +60,9 @@ export class AppNode implements TreeNode {
 
             // indicate that App exists, but it is empty
             if (resources.length === 0) {
-                if (await fs.exists(this.location.samTemplateUri)) {
-                    return [
-                        createPlaceholderItem(
-                            localize(
-                                'AWS.appBuilder.explorerNode.app.noResource',
-                                '[No resource found in IaC template]'
-                            )
-                        ),
-                    ]
-                }
                 return [
                     createPlaceholderItem(
-                        localize('AWS.appBuilder.explorerNode.app.noTemplate', '[No IaC templates found in Workspaces]')
+                        localize('AWS.appBuilder.explorerNode.app.noResource', '[No resource found in SAM template]')
                     ),
                 ]
             }
@@ -84,7 +73,7 @@ export class AppNode implements TreeNode {
                 createPlaceholderItem(
                     localize(
                         'AWS.appBuilder.explorerNode.app.noResourceTree',
-                        '[Unable to load Resource tree for this App. Update IaC template]'
+                        '[Unable to load Resource tree for this App. Update SAM template]'
                     )
                 ),
             ]

packages/core/src/awsService/appBuilder/explorer/nodes/rootNode.ts

@@ -26,7 +26,7 @@ export async function getAppNodes(): Promise<TreeNode[]> {
     if (appsFound.length === 0) {
         return [
             createPlaceholderItem(
-                localize('AWS.appBuilder.explorerNode.noApps', '[No IaC templates found in Workspaces]')
+                localize('AWS.appBuilder.explorerNode.noApps', '[No SAM templates found in Workspaces]')
             ),
         ]
     }

packages/core/src/test/shared/applicationBuilder/explorer/nodes/appNode.test.ts

@@ -90,7 +90,7 @@ describe('AppNode', () => {
 
             const resourceNode = resources[0] as TreeNode
             assert.strictEqual(resourceNode.id, 'placeholder')
-            assert.strictEqual(resourceNode.resource, '[No IaC templates found in Workspaces]')
+            assert.strictEqual(resourceNode.resource, '[No resource found in SAM template]')
             assert(getAppStub.calledOnce)
             assert(getStackNameStub.calledOnce)
             assert(generateStackNodeStub.notCalled)
@@ -157,7 +157,7 @@ describe('AppNode', () => {
             assert.strictEqual(resourceNode.id, 'placeholder')
             assert.strictEqual(
                 resourceNode.resource,
-                '[Unable to load Resource tree for this App. Update IaC template]'
+                '[Unable to load Resource tree for this App. Update SAM template]'
             )
             assert(getAppStub.calledOnce)
             assert(getStackNameStub.notCalled)

packages/core/src/test/shared/applicationBuilder/explorer/nodes/rootNode.test.ts

@@ -34,7 +34,7 @@ describe('getAppNodes', async () => {
         const appNodes = await getAppNodes()
         assert.strictEqual(appNodes.length, 1)
         assert.strictEqual(appNodes[0].id, 'placeholder')
-        assert.strictEqual(appNodes[0].resource, '[No IaC templates found in Workspaces]')
+        assert.strictEqual(appNodes[0].resource, '[No SAM templates found in Workspaces]')
     })
 
     it('should return all SAM projects as AppNode', async () => {

packages/toolkit/.changes/next-release/Bug Fix-3f75e95c-f940-42e3-b0e2-b6a3b9143a58.json

@@ -0,0 +1,4 @@
+{
+	"type": "Bug Fix",
+	"description": "SAM debugging: misleading 'IaC' message/placeholder"
+}