refactor(vite): migrate to tsup (#326)

packages/vite/esbuild-shims/cjs-shim.ts

@@ -0,0 +1,7 @@
+import { createRequire } from 'node:module'
+import path from 'node:path'
+import url from 'node:url'
+
+globalThis.require = createRequire(import.meta.url)
+globalThis.__filename = url.fileURLToPath(import.meta.url)
+globalThis.__dirname = path.dirname(__filename)

packages/vite/package.json

@@ -43,8 +43,8 @@
     "node": ">=v14.21.3"
   },
   "scripts": {
-    "build": "unbuild",
-    "stub": "unbuild --stub"
+    "build": "tsup",
+    "stub": "tsup --watch"
   },
   "peerDependencies": {
     "vite": "^3.1.0 || ^4.0.0-0 || ^5.0.0-0"

packages/vite/tsup.config.ts

@@ -0,0 +1,35 @@
+import { defineConfig } from 'tsup'
+
+export default defineConfig({
+  entryPoints: [
+    'src/vite.ts',
+  ],
+  // To avoid esbuild compile import.meta.url to import_meta.url
+  // See: https://github.com/vitejs/vite/issues/503
+  target: 'es2020',
+  clean: true,
+  format: ['esm', 'cjs'],
+  // Force esbuild to use .mjs extension for ESM output
+  outExtension({ format }) {
+    if (format === 'esm') {
+      return {
+        js: '.mjs',
+        dts: '.d.ts',
+      }
+    }
+    else if (format === 'cjs') {
+      return {
+        js: '.cjs',
+        dts: '.d.cts',
+      }
+    }
+    return {
+      js: '.js',
+      dts: '.d.ts',
+    }
+  },
+  // See: https://github.com/evanw/esbuild/issues/1921
+  inject: ['./esbuild-shims/cjs-shim.ts'],
+  dts: true,
+  shims: true,
+})