Build package with tsup

.yarn/patches/tsup-npm-8.0.2-86e40f68a7.patch

@@ -0,0 +1,13 @@
+diff --git a/dist/index.js b/dist/index.js
+index 4500c4e43c3bbd24aa60b7d4cf95aa3fee8eb185..9c442bc216f99b7cfadb5ac62cb98d3ae9ce2f56 100644
+--- a/dist/index.js
++++ b/dist/index.js
+@@ -1813,6 +1813,8 @@ var cjsSplitting = () => {
+       }
+       const { transform: transform3 } = await Promise.resolve().then(() => require("sucrase"));
+       const result = transform3(code, {
++        // https://github.com/egoist/tsup/issues/1087
++        disableESTransforms: true,
+         filePath: info.path,
+         transforms: ["imports"],
+         sourceMapOptions: this.options.sourcemap ? {

package.json

@@ -38,44 +38,37 @@
   "sideEffects": false,
   "exports": {
     ".": {
-      "import": {
-        "default": "./dist/index.mjs",
-        "types": "./dist/index.d.mts"
-      },
-      "require": {
-        "default": "./dist/index.cjs",
-        "types": "./dist/index.d.cts"
-      }
-    }
+      "import": "./dist/index.mjs",
+      "require": "./dist/index.js",
+      "types": "./dist/types/index.d.ts"
+    },
+    "./package.json": "./package.json"
   },
-  "main": "./dist/index.cjs",
+  "main": "./dist/index.js",
   "module": "./dist/index.mjs",
-  "types": "./dist/index.d.cts",
+  "types": "./dist/types/index.d.ts",
   "files": [
     "dist"
   ],
   "scripts": {
-    "build": "rm -rf ./dist && rollup --config ./rollup.config.mjs",
-    "clean": "rm -rf ./{dist,node_modules}",
+    "build": "tsup --clean && yarn build:types",
+    "build:types": "tsc --project tsconfig.build.json",
     "lint": "yarn lint:eslint && yarn lint:misc --check && yarn lint:dependencies --check && yarn lint:changelog",
     "lint:changelog": "auto-changelog validate --prettier",
     "lint:dependencies": "depcheck && yarn dedupe",
     "lint:eslint": "eslint . --cache --ext js,ts",
     "lint:fix": "yarn lint:eslint --fix && yarn lint:misc --write && yarn lint:dependencies && yarn lint:changelog",
     "lint:misc": "prettier '**/*.json' '**/*.md' '**/*.yml' '!.yarnrc.yml' --ignore-path .gitignore --no-error-on-unmatched-pattern",
-    "release": "npm run build && npm run lint && np",
-    "test": "npm run build && npm run test:types && npm run test:vitest",
-    "test:types": "tsc --noEmit && tsc --project ./test/tsconfig.json --noEmit",
-    "test:vitest": "vitest run",
-    "watch": "npm run build -- --watch"
+    "test": "yarn test:types && yarn test:vitest",
+    "test:types": "tsc --noEmit",
+    "test:vitest": "vitest run"
   },
   "devDependencies": {
     "@lavamoat/allow-scripts": "^3.0.3",
     "@metamask/eslint-config": "^12.2.0",
     "@metamask/eslint-config-jest": "^12.1.0",
     "@metamask/eslint-config-nodejs": "^12.1.0",
     "@metamask/eslint-config-typescript": "^12.1.0",
-    "@rollup/plugin-typescript": "^9.0.2",
     "@types/expect": "^24.3.0",
     "@types/lodash": "^4.14.144",
     "@types/lodash-es": "^4.17.12",
@@ -96,10 +89,9 @@
     "is-uuid": "^1.0.2",
     "jest": "^29.7.0",
     "lodash-es": "^4.17.21",
-    "np": "^7.6.2",
     "prettier": "^2.7.1",
     "prettier-plugin-packagejson": "^2.3.0",
-    "rollup": "^3.3.0",
+    "tsup": "patch:tsup@npm%3A8.0.2#~/.yarn/patches/tsup-npm-8.0.2-86e40f68a7.patch",
     "typescript": "~4.8.4",
     "vitest": "^1.2.2"
   },
@@ -112,7 +104,8 @@
   },
   "lavamoat": {
     "allowScripts": {
-      "vitest>vite>esbuild": true
+      "vitest>vite>esbuild": true,
+      "tsup>esbuild": true
     }
   }
 }

tsconfig.build.json

@@ -0,0 +1,24 @@
+{
+  "extends": "./tsconfig.json",
+  "compilerOptions": {
+    "declaration": true,
+    "declarationMap": true,
+    "emitDeclarationOnly": true,
+    "inlineSources": true,
+    "noEmit": false,
+    "outDir": "dist/types",
+    "rootDir": "src",
+    "sourceMap": true
+  },
+  "include": ["./src/**/*.ts"],
+  "exclude": [
+    "./src/**/__fixtures__/**/*",
+    "./src/**/__mocks__/**/*",
+    "./src/**/__test__/**/*",
+    "./src/**/__tests__/**/*",
+    "./src/**/__snapshots__/**/*",
+    "./src/**/*.test.ts",
+    "./src/**/*.test-d.ts",
+    "./src/**/*.test.*.ts"
+  ]
+}

tsconfig.json

@@ -9,6 +9,7 @@
     "noEmit": true,
     "noErrorTruncation": true,
     "noUncheckedIndexedAccess": true,
+    "skipLibCheck": true,
     "strict": true,
     "target": "es2020"
   },

tsup.config.ts

@@ -0,0 +1,35 @@
+import { defineConfig } from 'tsup';
+
+export default defineConfig({
+  // The entry to bundle.
+  entry: [
+    'src/**/*.ts',
+    '!src/**/__fixtures__/**/*',
+    '!src/**/__mocks__/**/*',
+    '!src/**/__test__/**/*',
+    '!src/**/__tests__/**/*',
+    '!src/**/__snapshots__/**/*',
+    '!src/**/*.test.ts',
+    '!src/**/*.test-d.ts',
+    '!src/**/*.test.*.ts',
+  ],
+
+  // The output formats. We want to generate both CommonJS and ESM bundles.
+  // https://tsup.egoist.dev/#bundle-formats
+  format: ['cjs', 'esm'],
+
+  // Generate sourcemaps as separate files.
+  // https://tsup.egoist.dev/#generate-sourcemap-file
+  sourcemap: true,
+
+  // Clean the dist folder before bundling.
+  clean: true,
+
+  // Hide unnecessary logs from the console. Warnings and errors will still be
+  // shown.
+  silent: true,
+
+  // Split the output into chunks. This is useful for tree-shaking.
+  // https://tsup.egoist.dev/#code-splitting
+  splitting: true,
+});