feat: support legal comments (#246)

* feat: add legalComments

* feat: add legalComments

* refactor

Co-authored-by: asins <asinsimple@alibaba-inc.com>
Co-authored-by: EGOIST <0x142857@gmail.com>

src/index.ts

@@ -1,7 +1,13 @@
 import { existsSync, statSync } from 'fs'
 import { extname, resolve, dirname, join } from 'path'
 import { Plugin, PluginContext } from 'rollup'
-import { transform, Loader, formatMessages, Message } from 'esbuild'
+import {
+  transform,
+  Loader,
+  formatMessages,
+  Message,
+  CommonOptions,
+} from 'esbuild'
 import { createFilter, FilterPattern } from '@rollup/pluginutils'
 import { getOptions } from './options'
 import { bundle } from './bundle'
@@ -21,6 +27,7 @@ export type Options = {
   minifyWhitespace?: boolean
   minifyIdentifiers?: boolean
   minifySyntax?: boolean
+  legalComments?: CommonOptions['legalComments']
   target?: string | string[]
   /**
    * Requires esbuild >= 0.12.1
@@ -160,6 +167,7 @@ export default (options: Options = {}): Plugin => {
         define: options.define,
         sourcemap: options.sourceMap !== false,
         sourcefile: id,
+        legalComments: options.legalComments,
       })
 
       await warn(this, result.warnings)

test/index.test.ts

@@ -106,6 +106,24 @@ test('minify syntax only', async () => {
   `)
 })
 
+
+test('legal comments none', async () => {
+  mockfs({
+    './fixture/index.js': `/** @preserve comment */
+      /*!
+       * comment
+       */
+      //! comment
+      console.log(1 === 1);
+    `,
+  })
+  const output = await build({ minify: true, legalComments: 'none' })
+  expect(output[0].code).toMatchInlineSnapshot(`
+    "console.log(!0);
+    "
+  `)
+})
+
 test('load index.(x)', async () => {
   mockfs({
     './fixture/index.js': `