feat: emit a warning when minify: true (#3182)

### Description

closes #3173 

This is a simple feature issue that I noticed nobody was working on, so
I implemented it.

packages/rolldown/src/log/logs.ts

@@ -6,7 +6,16 @@ const INVALID_LOG_POSITION = 'INVALID_LOG_POSITION',
   PLUGIN_ERROR = 'PLUGIN_ERROR',
   INPUT_HOOK_IN_OUTPUT_PLUGIN = 'INPUT_HOOK_IN_OUTPUT_PLUGIN',
   CYCLE_LOADING = 'CYCLE_LOADING',
-  MULTIPLY_NOTIFY_OPTION = 'MULTIPLY_NOTIFY_OPTION'
+  MULTIPLY_NOTIFY_OPTION = 'MULTIPLY_NOTIFY_OPTION',
+  MINIFY_WARNING = 'MINIFY_WARNING'
+
+export function logMinifyWarning(): RollupLog {
+  return {
+    code: MINIFY_WARNING,
+    message:
+      'The built-in minifier is still under development. Setting "minify: true" is not recommended for production use.',
+  }
+}
 
 export function logInvalidLogPosition(pluginName: string): RollupLog {
   return {

packages/rolldown/src/utils/create-bundler-option.ts

@@ -12,12 +12,13 @@ import {
   normalizePlugins,
 } from './normalize-plugin-option'
 import { initializeParallelPlugins } from './initialize-parallel-plugins'
-import type { InputOptions } from '../options/input-options'
-import type { OutputOptions } from '../options/output-options'
-import { LOG_LEVEL_INFO } from '../log/logging'
-import { getLogger, getOnLog } from '../log/logger'
 import { getObjectPlugins } from '../plugin/plugin-driver'
 import { LogHandler } from '../rollup'
+import { logMinifyWarning } from '../log/logs'
+import { getLogger, getOnLog } from '../log/logger'
+import { LOG_LEVEL_INFO, LOG_LEVEL_WARN } from '../log/logging'
+import type { InputOptions } from '../options/input-options'
+import type { OutputOptions } from '../options/output-options'
 
 export async function createBundlerOptions(
   inputOptions: InputOptions,
@@ -33,19 +34,23 @@ export async function createBundlerOptions(
 
   const outputPlugins = await normalizePluginOption(outputOptions.plugins)
 
-  // The `outputOptions` hook is called with the input plugins and the output plugins
-  outputOptions = pluginDriver.callOutputOptionsHook(
-    [...inputPlugins, ...outputPlugins],
-    outputOptions,
-  )
-
   const logLevel = inputOptions.logLevel || LOG_LEVEL_INFO
   const onLog = getLogger(
     getObjectPlugins(inputPlugins),
     getOnLog(inputOptions, logLevel),
     logLevel,
   )
 
+  // The `outputOptions` hook is called with the input plugins and the output plugins
+  outputOptions = pluginDriver.callOutputOptionsHook(
+    [...inputPlugins, ...outputPlugins],
+    outputOptions,
+  )
+
+  if (outputOptions.minify === true) {
+    onLog(LOG_LEVEL_WARN, logMinifyWarning())
+  }
+
   let plugins = [
     ...normalizePlugins(inputPlugins, ANONYMOUS_PLUGIN_PREFIX),
     ...checkOutputPluginOption(