chore: enable isolatedModules in TypeScript configs (#36024)

mrgrain · web-flow · commit 76e0fa0ecf60 · 2025-11-12T11:40:40.000Z
### Reason for this change Follow-up to #35997 in which I missed many tsconfigs and also didn't actually remove the deprecated `ts-jest` config. ### Description of changes - Added `"isolatedModules": true` to all `tsconfig.json` and `tsconfig.dev.json` files across packages and tools - Removed the redundant `isolatedModules` override from the Jest configuration in `cdk-build-tools` since it's now set globally in TypeScript configs ### Describe any new or updated permissions being added None ### Description of how you validated changes This is a build configuration change that enables stricter TypeScript compilation checks. ### Checklist - [x] My code adheres to the [CONTRIBUTING GUIDE](https://github.com/aws/aws-cdk/blob/main/CONTRIBUTING.md) and [DESIGN GUIDELINES](https://github.com/aws/aws-cdk/blob/main/docs/DESIGN_GUIDELINES.md) ---- *By submitting this pull request, I confirm that my contribution is made under the terms of the Apache-2.0 license*
diff --git a/packages/@aws-cdk-testing/framework-integ/tsconfig.json b/packages/@aws-cdk-testing/framework-integ/tsconfig.json
@@ -15,6 +15,7 @@
         "noFallthroughCasesInSwitch": true,
         "resolveJsonModule": true,
         "composite": true,
+        "isolatedModules": true,
         "incremental": true
     },
     "include": [
diff --git a/packages/@aws-cdk/aws-ec2-alpha/tsconfig.json b/packages/@aws-cdk/aws-ec2-alpha/tsconfig.json
@@ -25,6 +25,7 @@
     "stripInternal": false,
     "target": "es2022",
     "composite": true,
+    "isolatedModules": true,
     "tsBuildInfoFile": "tsconfig.tsbuildinfo",
     "esModuleInterop": true
   },
diff --git a/packages/@aws-cdk/aws-imagebuilder-alpha/tsconfig.json b/packages/@aws-cdk/aws-imagebuilder-alpha/tsconfig.json
@@ -25,6 +25,7 @@
     "stripInternal": false,
     "target": "es2022",
     "composite": true,
+    "isolatedModules": true,
     "tsBuildInfoFile": "tsconfig.tsbuildinfo",
     "esModuleInterop": false
   },
diff --git a/packages/@aws-cdk/aws-pipes-alpha/tsconfig.dev.json b/packages/@aws-cdk/aws-pipes-alpha/tsconfig.dev.json
@@ -25,6 +25,7 @@
     "stripInternal": false,
     "target": "ES2022",
     "composite": false,
+    "isolatedModules": true,
     "tsBuildInfoFile": "tsconfig.dev.tsbuildinfo"
   },
   "include": [
diff --git a/packages/@aws-cdk/aws-pipes-alpha/tsconfig.json b/packages/@aws-cdk/aws-pipes-alpha/tsconfig.json
@@ -25,9 +25,9 @@
     "stripInternal": false,
     "target": "es2022",
     "composite": true,
+    "isolatedModules": true,
     "tsBuildInfoFile": "tsconfig.tsbuildinfo",
-    "esModuleInterop": false,
-    "isolatedModules": true
+    "esModuleInterop": false
   },
   "include": [
     "**/*.ts"
diff --git a/packages/@aws-cdk/aws-pipes-enrichments-alpha/tsconfig.dev.json b/packages/@aws-cdk/aws-pipes-enrichments-alpha/tsconfig.dev.json
@@ -25,6 +25,7 @@
     "stripInternal": false,
     "target": "ES2022",
     "composite": false,
+    "isolatedModules": true,
     "tsBuildInfoFile": "tsconfig.dev.tsbuildinfo"
   },
   "include": [
diff --git a/packages/@aws-cdk/aws-pipes-sources-alpha/tsconfig.dev.json b/packages/@aws-cdk/aws-pipes-sources-alpha/tsconfig.dev.json
@@ -25,6 +25,7 @@
     "stripInternal": false,
     "target": "ES2022",
     "composite": false,
+    "isolatedModules": true,
     "tsBuildInfoFile": "tsconfig.dev.tsbuildinfo"
   },
   "include": [
diff --git a/packages/@aws-cdk/aws-pipes-targets-alpha/tsconfig.dev.json b/packages/@aws-cdk/aws-pipes-targets-alpha/tsconfig.dev.json
@@ -25,6 +25,7 @@
     "stripInternal": false,
     "target": "ES2022",
     "composite": false,
+    "isolatedModules": true,
     "tsBuildInfoFile": "tsconfig.dev.tsbuildinfo"
   },
   "include": [
diff --git a/packages/@aws-cdk/aws-route53resolver-alpha/tsconfig.json b/packages/@aws-cdk/aws-route53resolver-alpha/tsconfig.json
@@ -25,6 +25,7 @@
     "stripInternal": false,
     "target": "es2022",
     "composite": true,
+    "isolatedModules": true,
     "tsBuildInfoFile": "tsconfig.tsbuildinfo",
     "esModuleInterop": true
   },
diff --git a/packages/@aws-cdk/aws-servicecatalogappregistry-alpha/tsconfig.json b/packages/@aws-cdk/aws-servicecatalogappregistry-alpha/tsconfig.json
@@ -25,6 +25,7 @@
     "stripInternal": false,
     "target": "es2022",
     "composite": true,
+    "isolatedModules": true,
     "tsBuildInfoFile": "tsconfig.tsbuildinfo",
     "esModuleInterop": true
   },
diff --git a/packages/@aws-cdk/custom-resource-handlers/tsconfig.dev.json b/packages/@aws-cdk/custom-resource-handlers/tsconfig.dev.json
@@ -15,6 +15,7 @@
         "resolveJsonModule": true,
         "composite": true,
         "incremental": true,
+        "isolatedModules": true
     },
     "include": [
         "**/*.ts",
diff --git a/packages/aws-cdk-lib/tsconfig.dev.json b/packages/aws-cdk-lib/tsconfig.dev.json
@@ -26,6 +26,7 @@
     "stripInternal": false,
     "target": "ES2022",
     "composite": false,
+    "isolatedModules": true,
     "tsBuildInfoFile": "tsconfig.dev.tsbuildinfo"
   },
   "include": [
diff --git a/packages/awslint/tsconfig.json b/packages/awslint/tsconfig.json
@@ -15,6 +15,7 @@
       "noFallthroughCasesInSwitch": true,
       "resolveJsonModule": true,
       "composite": true,
+      "isolatedModules": true,
       "incremental": true
     },
     "include": ["**/*.ts"]
diff --git a/tools/@aws-cdk/cdk-build-tools/config/jest.config.js b/tools/@aws-cdk/cdk-build-tools/config/jest.config.js
@@ -11,11 +11,7 @@ module.exports = {
   // package to depend on `ts-jest` directly.
   transform: {
     '^.+\\.tsx?$': [
-      'ts-jest',
-      {
-        // Skips type checking
-        isolatedModules: true,
-      },
+      'ts-jest'
     ],
   },
   // Jest is resource greedy so this shouldn't be more than 50%
diff --git a/tools/@aws-cdk/cdk-build-tools/tsconfig.json b/tools/@aws-cdk/cdk-build-tools/tsconfig.json
@@ -13,6 +13,7 @@
     "noFallthroughCasesInSwitch": true,
     "resolveJsonModule": true,
     "composite": true,
+    "isolatedModules": true,
     "incremental": true
   },
   "include": ["**/*.ts"]
diff --git a/tools/@aws-cdk/cdk-release/tsconfig.json b/tools/@aws-cdk/cdk-release/tsconfig.json
@@ -14,6 +14,7 @@
     "noFallthroughCasesInSwitch": true,
     "resolveJsonModule": true,
     "composite": true,
+    "isolatedModules": true,
     "incremental": true
   },
   "exclude": ["test/enrichments/**"],
diff --git a/tools/@aws-cdk/construct-metadata-updater/tsconfig.json b/tools/@aws-cdk/construct-metadata-updater/tsconfig.json
@@ -15,6 +15,7 @@
     "resolveJsonModule": true,
     "composite": true,
     "incremental": true,
+    "isolatedModules": true,
     "moduleResolution": "node"
   },
   "include": ["**/*.ts"],
diff --git a/tools/@aws-cdk/enum-updater/tsconfig.json b/tools/@aws-cdk/enum-updater/tsconfig.json
@@ -15,6 +15,7 @@
     "resolveJsonModule": true,
     "composite": true,
     "incremental": true,
+    "isolatedModules": true,
     "moduleResolution": "node"
   },
   "include": ["**/*.ts"],
diff --git a/tools/@aws-cdk/integration-test-deployment/tsconfig.json b/tools/@aws-cdk/integration-test-deployment/tsconfig.json
@@ -14,6 +14,7 @@
     "noFallthroughCasesInSwitch": true,
     "resolveJsonModule": true,
     "composite": true,
+    "isolatedModules": true,
     "incremental": true,
     "moduleResolution": "node",
     "types": ["node"],
diff --git a/tools/@aws-cdk/lambda-integration-test-updater/tsconfig.json b/tools/@aws-cdk/lambda-integration-test-updater/tsconfig.json
@@ -14,6 +14,7 @@
     "noFallthroughCasesInSwitch": true,
     "resolveJsonModule": true,
     "composite": true,
+    "isolatedModules": true,
     "incremental": true
   },
   "include": ["**/*.ts"],
diff --git a/tools/@aws-cdk/lazify/tsconfig.json b/tools/@aws-cdk/lazify/tsconfig.json
@@ -3,6 +3,7 @@
     "alwaysStrict": true,
     "declaration": true,
     "esModuleInterop": true,
+    "isolatedModules": true,
     "experimentalDecorators": true,
     "inlineSourceMap": true,
     "inlineSources": true,
diff --git a/tools/@aws-cdk/pkglint/tsconfig.json b/tools/@aws-cdk/pkglint/tsconfig.json
@@ -13,6 +13,7 @@
     "noFallthroughCasesInSwitch": true,
     "resolveJsonModule": true,
     "composite": true,
+    "isolatedModules": true,
     "incremental": true
   },
   "include": ["**/*.ts"]
diff --git a/tools/@aws-cdk/pkgtools/tsconfig.json b/tools/@aws-cdk/pkgtools/tsconfig.json
@@ -14,6 +14,7 @@
     "noFallthroughCasesInSwitch": true,
     "resolveJsonModule": true,
     "composite": true,
+    "isolatedModules": true,
     "incremental": true
   },
   "include": ["**/*.ts"]
diff --git a/tools/@aws-cdk/prlint/tsconfig.json b/tools/@aws-cdk/prlint/tsconfig.json
@@ -13,6 +13,7 @@
     "noFallthroughCasesInSwitch": true,
     "resolveJsonModule": true,
     "composite": true,
+    "isolatedModules": true,
     "incremental": true
   },
   "include": ["**/*.ts"]
diff --git a/tools/@aws-cdk/project-sync/tsconfig.json b/tools/@aws-cdk/project-sync/tsconfig.json
@@ -14,6 +14,7 @@
     "noFallthroughCasesInSwitch": true,
     "resolveJsonModule": true,
     "composite": true,
+    "isolatedModules": true,
     "incremental": true,
     "moduleResolution": "node",
     "types": ["node"]
diff --git a/tools/@aws-cdk/security-guardian/tsconfig.json b/tools/@aws-cdk/security-guardian/tsconfig.json
@@ -4,6 +4,7 @@
     "module": "commonjs",
     "lib": ["ES2022"],
     "outDir": "dist",
+    "isolatedModules": true,
     "esModuleInterop": true,
     "forceConsistentCasingInFileNames": true,
     "strict": true,
