feat: support parallel builds

Co-authored-by: Pooya Parsa <pooya@pi0.io>

Author: Sunny-117

src/build.ts

@@ -155,6 +155,7 @@ async function _build(
           respectExternal: true,
         },
       },
+      parallel: false,
     },
   ) as BuildOptions;
 
@@ -273,17 +274,20 @@ async function _build(
   //   await symlink(resolve(ctx.rootDir), nodemodulesDir).catch(() => {})
   // }
 
-  // untyped
-  await typesBuild(ctx);
-
-  // mkdist
-  await mkdistBuild(ctx);
-
-  // rollup
-  await rollupBuild(ctx);
-
-  // copy
-  await copyBuild(ctx);
+  const buildTasks = [
+    typesBuild, // untyped
+    mkdistBuild, // mkdist
+    rollupBuild, // rollup
+    copyBuild, // copy
+  ] as const;
+
+  if (options.parallel) {
+    await Promise.all(buildTasks.map((task) => task(ctx)));
+  } else {
+    for (const task of buildTasks) {
+      await task(ctx);
+    }
+  }
 
   // Skip rest for stub and watch mode
   if (options.stub || options.watch) {

src/cli.ts

@@ -41,6 +41,11 @@ const main = defineCommand({
       type: "boolean",
       description: "Generate sourcemaps (experimental)",
     },
+    parallel: {
+      type: "boolean",
+      description:
+        "Run different types of builds (untyped, mkdist, Rollup, copy) simultaneously.",
+    },
   },
   async run({ args }) {
     const rootDir = resolve(process.cwd(), args.dir || ".");

src/types.ts

@@ -138,6 +138,11 @@ export interface BuildOptions {
    * [Rollup](https://rollupjs.org/configuration-options) Build Options
    */
   rollup: RollupBuildOptions;
+
+  /**
+   * Run different types of builds (untyped, mkdist, Rollup, copy) simultaneously.
+   */
+  parallel: boolean;
 }
 
 export interface BuildContext {