feat: allow passing array of array in config.plugins (#1938)

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### Description
1. This could allow the user or developer to compose two or more
different types plugin into one, this is easy for distributing.
2. See test as an example.
3. Progressive porting js plugin.
4. Prerequisite of porting `vite:build-import-analysis`
<!-- Please insert your description here and provide especially info
about the "what" this PR is solving -->

packages/rolldown/src/options/input-options.ts

@@ -1,4 +1,4 @@
-import type { RolldownPlugin } from '../plugin'
+import type { RolldownPluginRec } from '../plugin'
 import { z } from 'zod'
 import * as zodExt from '../utils/zod-ext'
 import {
@@ -27,7 +27,7 @@ const externalSchema = zodExt
 
 const inputOptionsSchema = z.strictObject({
   input: inputOptionSchema.optional(),
-  plugins: zodExt.phantom<RolldownPlugin>().array().optional(),
+  plugins: zodExt.phantom<RolldownPluginRec>().array().optional(),
   external: externalSchema.optional(),
   resolve: z
     .strictObject({

packages/rolldown/src/plugin/index.ts

@@ -255,4 +255,6 @@ export interface Plugin<A = any> extends OutputPlugin, Partial<PluginHooks> {
   api?: A
 }
 
-export type RolldownPlugin<A = any> = Plugin<A> | ParallelPlugin | BuiltinPlugin
+export type RolldownPlugin<A = any> = Plugin<A> | BuiltinPlugin | ParallelPlugin
+// A recursive type definition for `RolldownPlugin`, this type is used internally for `config.plugins`
+export type RolldownPluginRec<A = any> = RolldownPlugin<A> | RolldownPlugin<A>[]

packages/rolldown/src/plugin/plugin-driver.ts

@@ -1,6 +1,6 @@
 import { getLogHandler, normalizeLog } from '../log/logHandler'
 import { LOG_LEVEL_DEBUG, LOG_LEVEL_INFO, LOG_LEVEL_WARN } from '../log/logging'
-import { Plugin, RolldownPlugin } from './'
+import { Plugin, RolldownPluginRec } from './'
 import { error, logPluginError } from '../log/logs'
 import { NormalizedInputOptions } from '../options/normalized-input-options'
 import { RollupError } from '../rollup'
@@ -87,7 +87,7 @@ export class PluginDriver {
   }
 }
 
-export function getObjectPlugins(plugins: RolldownPlugin[]): Plugin[] {
+export function getObjectPlugins(plugins: RolldownPluginRec[]): Plugin[] {
   return plugins.filter((plugin) => {
     if ('_parallel' in plugin) {
       return undefined

packages/rolldown/tests/fixtures/plugin/hybrid-plugin/_config.ts

@@ -0,0 +1,35 @@
+import { expect } from 'vitest'
+import path from 'node:path'
+import { defineTest } from '@tests'
+import { loadFallbackPlugin } from 'rolldown/experimental'
+import { RolldownPlugin } from '@src/plugin'
+
+const entry = path.join(__dirname, './main.js')
+
+function removeConsoleForPathWithQuery(): RolldownPlugin[] {
+  return [
+    loadFallbackPlugin(),
+    {
+      name: 'remove-console',
+      transform(code) {
+        return code.replace('console.log', '')
+      },
+    },
+  ]
+}
+export default defineTest({
+  config: {
+    input: entry,
+    plugins: [
+      {
+        name: 'test-plugin',
+        banner: () => '/* Lorem ipsum */',
+      },
+      removeConsoleForPathWithQuery(),
+    ],
+  },
+  afterTest: async (output) => {
+    expect(output.output[0].code).toContain('/* Lorem ipsum */')
+    await import('./assert.mjs')
+  },
+})

packages/rolldown/tests/fixtures/plugin/hybrid-plugin/assert.mjs

@@ -0,0 +1,4 @@
+import { a } from './dist/main'
+import assert from 'node:assert'
+
+assert(a === 1)

packages/rolldown/tests/fixtures/plugin/hybrid-plugin/main.js

@@ -0,0 +1 @@
+export const a = console.log(1)