chore: add internal vite config (#568)

devtools/vite-config/package.json

@@ -0,0 +1,24 @@
+{
+  "name": "vite-config",
+  "version": "1.0.0",
+  "type": "module",
+  "private": true,
+  "exports": {
+    "types": "./dist/index.d.ts",
+    "default": "./dist/index.js"
+  },
+  "scripts": {
+    "build": "tsc",
+    "lint": "eslint .",
+    "format": "prettier --check --ignore-unknown --ignore-path ../../.prettierignore .",
+    "format:fix": "prettier --write --ignore-unknown --ignore-path ../../.prettierignore .",
+    "types": "tsc --noEmit"
+  },
+  "devDependencies": {
+    "oxc-transform": "0.50.0",
+    "rollup-plugin-preserve-directives": "0.4.0",
+    "unplugin-isolated-decl": "0.11.0",
+    "vite": "5.4.14",
+    "vite-plugin-externalize-deps": "0.9.0"
+  }
+}

devtools/vite-config/src/index.ts

@@ -0,0 +1,37 @@
+import type { UserConfig } from 'vite'
+import { preserveDirectives } from 'rollup-plugin-preserve-directives'
+import { externalizeDeps } from 'vite-plugin-externalize-deps'
+import UnpluginIsolatedDecl from 'unplugin-isolated-decl/vite'
+
+interface Options {
+  /** Entry file, e.g. `./src/index.ts` */
+  entry: string | Array<string>
+}
+
+export function defineViteConfig({ entry }: Options): UserConfig {
+  const outDir = 'dist'
+
+  return {
+    build: {
+      outDir,
+      minify: false,
+      sourcemap: true,
+      lib: {
+        entry,
+        formats: ['es'],
+        fileName: 'esm/[name]',
+      },
+      rollupOptions: {
+        output: {
+          preserveModules: true,
+          entryFileNames: 'esm/[name].js',
+        },
+      },
+    },
+    plugins: [
+      externalizeDeps(),
+      preserveDirectives(),
+      UnpluginIsolatedDecl({ transformer: 'oxc' }),
+    ],
+  }
+}

devtools/vite-config/tsconfig.json

@@ -0,0 +1,14 @@
+{
+  "extends": "../../tsconfig.json",
+  "include": ["src"],
+  "compilerOptions": {
+    // Modules
+    "moduleResolution": "node16",
+    "module": "Node16",
+
+    // Emit
+    "noEmit": false,
+    "declaration": true,
+    "outDir": "dist"
+  }
+}