moving to tsup for building. checking output with @arethetypeswrong

.github/workflows/check.yml

@@ -33,5 +33,5 @@ jobs:
         run: yarn install
 
       # Validates project
-      - name: Typescript, prettier checks
+      - name: Typescript, prettier, dist checks
         run: yarn check

package.json

@@ -20,9 +20,12 @@
   "sideEffects": false,
   "type": "module",
   "exports": {
-    "import": "./dist/esm/index.js",
-    "require": "./dist/cjs/index.cjs",
-    "types": "./dist/esm/index.d.ts"
+    "types": {
+      "import": "./dist/index.d.js",
+      "require": "./dist/index.d.cjs"
+    },
+    "import": "./dist/index.js",
+    "require": "./dist/index.cjs"
   },
   "config": {
     "prettier_target": "src/**/*.ts test/**/*.ts"
@@ -33,36 +36,36 @@
   ],
   "size-limit": [
     {
-      "path": "./dist/esm/bind.js",
+      "path": "./dist/bind.js",
       "limit": "95B"
     },
     {
-      "path": "./dist/esm/bind-all.js",
+      "path": "./dist/bind-all.js",
       "limit": "211B"
     }
   ],
   "engines": {
     "node": ">=18"
   },
   "scripts": {
-    "build": "yarn build:clean && yarn build:dist:esm && yarn build:dist:cjs",
+    "build": "yarn build:clean && yarn build:dist",
     "build:clean": "rimraf dist",
-    "build:dist:esm": "tsc",
-    "build:dist:cjs": "esbuild ./src/* --outdir=./dist/cjs --format=cjs --out-extension:.js=.cjs",
-    "check": "yarn check:typescript && yarn check:prettier",
+    "build:dist": "tsup",
+    "check": "yarn check:typescript && yarn check:prettier && yarn check:dist",
     "check:prettier": "prettier --debug-check $npm_package_config_prettier_target",
     "check:typescript": "tsc --noEmit && tsc --noEmit --project ./test/tsconfig.json",
+    "check:dist": "attw --pack . --ignore-rules no-resolution",
     "prettier:write": "prettier --write $npm_package_config_prettier_target",
     "test": "yarn jest",
     "test:size": "size-limit",
     "prepublishOnly": "yarn build"
   },
   "dependencies": {},
   "devDependencies": {
+    "@arethetypeswrong/cli": "^0.15.3",
     "@size-limit/preset-small-lib": "^8.2.4",
     "@types/jest": "^29.5.1",
     "@types/node": "^18.16.0",
-    "esbuild": "^0.21.3",
     "expect-type": "^0.15.0",
     "jest": "^29.5.0",
     "jest-environment-jsdom": "^29.5.0",
@@ -71,6 +74,7 @@
     "size-limit": "^8.2.4",
     "ts-expect": "^1.3.0",
     "ts-jest": "^29.1.0",
+    "tsup": "^8.0.2",
     "typescript": "^5.0.4"
   }
 }

tsconfig.json

@@ -14,7 +14,6 @@
     "noImplicitOverride": true,
     /* If transpiling with TypeScript: */
     "module": "es2022",
-    "outDir": "dist/esm",
     /* AND if you're building for a library: */
     "declaration": true,
     /* If your code runs in the DOM: */

tsup.config.ts

@@ -0,0 +1,10 @@
+import { defineConfig } from 'tsup';
+
+export default defineConfig({
+  entry: ['src/*'],
+  bundle: false,
+  clean: true,
+  format: ['cjs', 'esm'],
+  dts: true,
+  tsconfig: './tsconfig.json',
+});