build: experimental build with node package

um_wasm_loader/rollup.config.mjs

@@ -0,0 +1,50 @@
+import { defineConfig } from 'rollup';
+import { wasm } from '@rollup/plugin-wasm';
+import replace from '@rollup/plugin-replace';
+import { dts } from 'rollup-plugin-dts';
+
+function makePlugins({ sync }) {
+  const plugins = [];
+  plugins.push(wasm({ sync: sync ? ['pkg/um_wasm_bg.wasm'] : [] }));
+  plugins.push(
+    replace({
+      preventAssignment: true,
+      values: {
+        'process.env.UMC_INLINE_BUILD': JSON.stringify(String(sync ? 1 : 0)),
+      },
+    }),
+  );
+  return plugins;
+}
+
+export default defineConfig([
+  {
+    input: 'src/loader.mjs',
+    output: {
+      file: 'dist/loader.js',
+      format: 'cjs',
+    },
+    plugins: [...makePlugins({ sync: false })],
+  },
+  {
+    input: 'src/loader.mjs',
+    output: {
+      file: 'dist/loader.mjs',
+      format: 'es',
+    },
+    plugins: [...makePlugins({ sync: false })],
+  },
+  {
+    input: 'src/loader.mjs',
+    output: {
+      file: 'dist/loader-inline.js',
+      format: 'cjs',
+    },
+    plugins: [...makePlugins({ sync: true })],
+  },
+  {
+    input: './src/loader.d.ts',
+    output: [{ file: 'dist/loader.d.ts', format: 'es' }],
+    plugins: [dts()],
+  },
+]);