Use @tsconfig/recommended and add tsconfig.cjs.json (smithy-lang#493)

Author: trivikr

smithy-typescript-codegen/src/main/java/software/amazon/smithy/typescript/codegen/CodegenVisitor.java

@@ -72,6 +72,7 @@ class CodegenVisitor extends ShapeVisitor.Default<Void> {
     private static final Map<String, String> STATIC_FILE_COPIES = MapUtils.of(
             "typedoc.json", "typedoc.json",
             "tsconfig.json", "tsconfig.json",
+            "tsconfig.cjs.json", "tsconfig.cjs.json",
             "tsconfig.es.json", "tsconfig.es.json",
             "tsconfig.types.json", "tsconfig.types.json"
     );

smithy-typescript-codegen/src/main/resources/software/amazon/smithy/typescript/codegen/base-package.json

@@ -4,7 +4,7 @@
   "version": "${packageVersion}",
   "scripts": {
     "build": "${packageManager} build:cjs && ${packageManager} build:es && ${packageManager} build:types",
-    "build:cjs": "tsc -p tsconfig.json",
+    "build:cjs": "tsc -p tsconfig.cjs.json",
     "build:docs": "typedoc",
     "build:es": "tsc -p tsconfig.es.json",
     "build:types": "tsc -p tsconfig.types.json",
@@ -19,6 +19,7 @@
     "tslib": "^2.3.0"
   },
   "devDependencies": {
+    "@tsconfig/recommended": "1.0.1",
     "downlevel-dts": "0.7.0",
     "rimraf": "^3.0.0",
     "typedoc": "^0.20.0",

smithy-typescript-codegen/src/main/resources/software/amazon/smithy/typescript/codegen/tsconfig.cjs.json

@@ -0,0 +1,8 @@
+{
+  "extends": "./tsconfig",
+  "compilerOptions": {
+    "target": "ES2018",
+    "module": "commonjs",
+    "outDir": "dist-cjs"
+  }
+}

smithy-typescript-codegen/src/main/resources/software/amazon/smithy/typescript/codegen/tsconfig.json

@@ -1,18 +1,11 @@
 {
+  "extends": "@tsconfig/recommended/tsconfig.json",
   "compilerOptions": {
-    "rootDir": "./src",
-    "alwaysStrict": true,
-    "target": "ES2018",
-    "module": "commonjs",
-    "strict": true,
     "downlevelIteration": true,
     "importHelpers": true,
-    "noEmitHelpers": true,
     "incremental": true,
+    "removeComments": true,
     "resolveJsonModule": true,
-    "esModuleInterop": true,
-    "outDir": "dist-cjs",
-    "removeComments": true
-  },
-  "exclude": ["test/**/*"]
+    "rootDir": "src"
+  }
 }