vite.config.ts

import { resolve } from "path";
import { existsSync, readdirSync, lstatSync, rmdirSync, unlinkSync } from "fs";
import { defineConfig } from "vite";
import vue from "@vitejs/plugin-vue";
import vueJsx from "@vitejs/plugin-vue-jsx";
import dts from "vite-plugin-dts";

const env = process.env.ENV;
if (env !== "TEST") {
  emptyDir(resolve(__dirname, "dist"));
}

export default defineConfig({
  resolve: {
    // alias: [{ find: /^@\/(.+)/, replacement: resolve(__dirname, '$1') }]
    alias: {
      "@": resolve(__dirname),
      "@components": resolve(__dirname, "src/components"),
    },
  },
  build: {
    lib: {
      entry: [resolve(__dirname, "src/main.ts")],
      name: "test-vue-vite",
      formats: ["es"],
      // fileName: 'test'
    },
    rollupOptions: {
      external: ["vue"],
      output: {
        // Provide global variables to use in the UMD build
        // for externalized deps
        globals: {
          vue: "Vue",
        },
      },
    },
  },
  plugins: [
    dts({
      outDir: ["dist"],
      exclude: ["src/index.ts"],
      staticImport: true,
      rollupTypes: true,
      insertTypesEntry: true,
      copyDtsFiles: true,
      strictOutput: true,
    }),
    vue(),
    vueJsx(),
  ],
});

function emptyDir(dir: string): void {
  if (!existsSync(dir)) {
    return;
  }

  for (const file of readdirSync(dir)) {
    const abs = resolve(dir, file);

    // baseline is Node 12 so can't use rmSync
    if (lstatSync(abs).isDirectory()) {
      emptyDir(abs);
      rmdirSync(abs);
    } else {
      unlinkSync(abs);
    }
  }
}