From ebcb5131558f8ac10f76123daee1ee0ddf531164 Mon Sep 17 00:00:00 2001
From: Aleen <aleen42@vip.qq.com>
Date: Thu, 5 Jan 2023 19:35:36 +0800
Subject: [PATCH 1/3] fix: should rename `x.[hash].js` to `x-legacy.[hash].js`

---
 packages/plugin-legacy/src/index.ts | 5 +++++
 1 file changed, 5 insertions(+)

diff --git a/packages/plugin-legacy/src/index.ts b/packages/plugin-legacy/src/index.ts
index 3e8b86eee48888..1ead162f17904f 100644
--- a/packages/plugin-legacy/src/index.ts
+++ b/packages/plugin-legacy/src/index.ts
@@ -314,6 +314,11 @@ function viteLegacyPlugin(options: Options = {}): Plugin[] {
           if (fileName.includes('[name]')) {
             // [name]-[hash].[format] -> [name]-legacy-[hash].[format]
             fileName = fileName.replace('[name]', '[name]-legacy')
+          } else if (fileName.includes('[hash]')) {
+            // custom[hash].[format] -> [name]-legacy[hash].[format]
+            // custom-[hash].[format] -> [name]-legacy-[hash].[format]
+            // custom.[hash].[format] -> [name]-legacy.[hash].[format]
+            fileName = fileName.replace(/[.-]?\[hash\]/, '-legacy$&')
           } else {
             // entry.js -> entry-legacy.js
             fileName = fileName.replace(/(.+)\.(.+)/, '$1-legacy.$2')

From 1c3b5bc96286d7c9e2eceb01d00e2ba071c6cf3a Mon Sep 17 00:00:00 2001
From: Aleen <aleen42@vip.qq.com>
Date: Fri, 6 Jan 2023 10:42:53 +0800
Subject: [PATCH 2/3] test: use a case to introduce the case when there is no
 `[name]`

---
 playground/legacy/__tests__/legacy.spec.ts | 7 +++++++
 playground/legacy/custom0.js               | 0
 playground/legacy/custom1.js               | 0
 playground/legacy/custom2.js               | 0
 playground/legacy/main.js                  | 3 +++
 playground/legacy/vite.config.js           | 4 ++++
 6 files changed, 14 insertions(+)
 create mode 100644 playground/legacy/custom0.js
 create mode 100644 playground/legacy/custom1.js
 create mode 100644 playground/legacy/custom2.js

diff --git a/playground/legacy/__tests__/legacy.spec.ts b/playground/legacy/__tests__/legacy.spec.ts
index 290f6b69ac1cf9..2ec5c56715ec7e 100644
--- a/playground/legacy/__tests__/legacy.spec.ts
+++ b/playground/legacy/__tests__/legacy.spec.ts
@@ -88,6 +88,13 @@ describe.runIf(isBuild)('build', () => {
     expect(manifest['../../vite/legacy-polyfills-legacy'].src).toBe(
       '../../vite/legacy-polyfills-legacy',
     )
+    expect(manifest['custom0-legacy.js'].file).toMatch(
+      /chunk-X-legacy.\w{8}.js/,
+    )
+    expect(manifest['custom1-legacy.js'].file).toMatch(
+      /chunk-X-legacy-\w{8}.js/,
+    )
+    expect(manifest['custom2-legacy.js'].file).toMatch(/chunk-X-legacy\w{8}.js/)
     // modern polyfill
     expect(manifest['../../vite/legacy-polyfills']).toBeDefined()
     expect(manifest['../../vite/legacy-polyfills'].src).toBe(
diff --git a/playground/legacy/custom0.js b/playground/legacy/custom0.js
new file mode 100644
index 00000000000000..e69de29bb2d1d6
diff --git a/playground/legacy/custom1.js b/playground/legacy/custom1.js
new file mode 100644
index 00000000000000..e69de29bb2d1d6
diff --git a/playground/legacy/custom2.js b/playground/legacy/custom2.js
new file mode 100644
index 00000000000000..e69de29bb2d1d6
diff --git a/playground/legacy/main.js b/playground/legacy/main.js
index 91ba0b038104c4..aee9bda9594354 100644
--- a/playground/legacy/main.js
+++ b/playground/legacy/main.js
@@ -3,6 +3,9 @@ import viteSvgPath from './vite.svg'
 import MyWorker from './worker?worker'
 
 async function run() {
+  await import('./custom0.js')
+  await import('./custom1.js')
+  await import('./custom2.js')
   const { fn } = await import('./async.js')
   fn()
 }
diff --git a/playground/legacy/vite.config.js b/playground/legacy/vite.config.js
index 7adf0f784eeeb2..c15a8b14b40cd2 100644
--- a/playground/legacy/vite.config.js
+++ b/playground/legacy/vite.config.js
@@ -23,6 +23,10 @@ module.exports = {
         chunkFileNames(chunkInfo) {
           if (chunkInfo.name === 'immutable-chunk') {
             return `assets/${chunkInfo.name}.js`
+          } else if (/custom\d/.test(chunkInfo.name)) {
+            return `assets/chunk-X${
+              ['.', '-', ''][/custom(\d)/.exec(chunkInfo.name)[1]]
+            }[hash].js`
           }
           return `assets/chunk-[name].[hash].js`
         },

From d77ada3b9088efeb9d34ec11524cc1568890abdd Mon Sep 17 00:00:00 2001
From: bluwy <bjornlu.dev@gmail.com>
Date: Fri, 6 Oct 2023 14:49:20 +0800
Subject: [PATCH 3/3] chore: fix test

---
 playground/legacy/custom0.js | 1 +
 playground/legacy/custom1.js | 1 +
 playground/legacy/custom2.js | 1 +
 3 files changed, 3 insertions(+)

diff --git a/playground/legacy/custom0.js b/playground/legacy/custom0.js
index e69de29bb2d1d6..21ec276fc7f825 100644
--- a/playground/legacy/custom0.js
+++ b/playground/legacy/custom0.js
@@ -0,0 +1 @@
+export const foo = 'bar'
diff --git a/playground/legacy/custom1.js b/playground/legacy/custom1.js
index e69de29bb2d1d6..21ec276fc7f825 100644
--- a/playground/legacy/custom1.js
+++ b/playground/legacy/custom1.js
@@ -0,0 +1 @@
+export const foo = 'bar'
diff --git a/playground/legacy/custom2.js b/playground/legacy/custom2.js
index e69de29bb2d1d6..21ec276fc7f825 100644
--- a/playground/legacy/custom2.js
+++ b/playground/legacy/custom2.js
@@ -0,0 +1 @@
+export const foo = 'bar'