feat: support the deleteOriginalAssets option as a function (#380)

Author: alexander-akait

README.md

@@ -381,7 +381,10 @@ module.exports = {
 Type:
 
 ```ts
-type deleteOriginalAssets = boolean | "keep-source-map";
+type deleteOriginalAssets =
+  | boolean
+  | "keep-source-map"
+  | ((name: string) => boolean);
 ```
 
 Default: `false`
@@ -400,7 +403,7 @@ module.exports = {
 };
 ```
 
-To exclude sourcemaps from compression
+To exclude sourcemaps from compression:
 
 ```js
 module.exports = {
@@ -413,6 +416,25 @@ module.exports = {
 };
 ```
 
+Using a custom function:
+
+```js
+module.exports = {
+  plugins: [
+    new CompressionPlugin({
+      exclude: /.map$/,
+      deleteOriginalAssets: (name) => {
+        if (/\.js$/.test(name)) {
+          return false;
+        }
+
+        return true;
+      },
+    }),
+  ],
+};
+```
+
 ## Examples
 
 ### Using Zopfli

src/index.js

@@ -58,7 +58,7 @@ const schema = require("./options.json");
  */
 
 /**
- * @typedef {boolean | "keep-source-map"} DeleteOriginalAssets
+ * @typedef {boolean | "keep-source-map" | ((name: string) => boolean)} DeleteOriginalAssets
  */
 
 /**
@@ -378,9 +378,17 @@ class CompressionPlugin {
                 // @ts-ignore
                 related: { sourceMap: null },
               });
-            }
 
-            compilation.deleteAsset(name);
+              compilation.deleteAsset(name);
+            } else if (
+              typeof this.options.deleteOriginalAssets === "function"
+            ) {
+              if (this.options.deleteOriginalAssets(name)) {
+                compilation.deleteAsset(name);
+              }
+            } else {
+              compilation.deleteAsset(name);
+            }
           } else {
             compilation.updateAsset(name, source, {
               related: { [relatedName]: newFilename },

src/options.json

@@ -98,6 +98,9 @@
         {
           "type": "boolean"
         },
+        {
+          "instanceof": "Function"
+        },
         {
           "enum": ["keep-source-map"]
         }

test/CompressionPlugin.test.js

@@ -25,8 +25,8 @@ describe("CompressionPlugin", () => {
       {
         output: {
           path: `${__dirname}/dist`,
-          filename: "[name].js?var=[hash]",
-          chunkFilename: "[id].[name].js?ver=[hash]",
+          filename: "[name].js?var=[contenthash]",
+          chunkFilename: "[id].[name].js?ver=[contenthash]",
         },
       },
     );
@@ -48,8 +48,8 @@ describe("CompressionPlugin", () => {
         devtool: "source-map",
         output: {
           path: `${__dirname}/dist`,
-          filename: "[name].js?var=[hash]",
-          chunkFilename: "[id].[name].js?ver=[hash]",
+          filename: "[name].js?var=[contenthash]",
+          chunkFilename: "[id].[name].js?ver=[contenthash]",
         },
       },
     );
@@ -72,8 +72,8 @@ describe("CompressionPlugin", () => {
       {
         output: {
           path: `${__dirname}/dist`,
-          filename: "[name].js?var=[hash]",
-          chunkFilename: "[id].[name].js?ver=[hash]",
+          filename: "[name].js?var=[contenthash]",
+          chunkFilename: "[id].[name].js?ver=[contenthash]",
         },
         module: {
           rules: [
@@ -119,8 +119,8 @@ describe("CompressionPlugin", () => {
       {
         output: {
           path: `${__dirname}/dist`,
-          filename: "[name].js?var=[hash]",
-          chunkFilename: "[id].[name].js?ver=[hash]",
+          filename: "[name].js?var=[contenthash]",
+          chunkFilename: "[id].[name].js?ver=[contenthash]",
         },
       },
     );
@@ -484,8 +484,8 @@ describe("CompressionPlugin", () => {
       {
         output: {
           path: `${__dirname}/dist`,
-          filename: "[name].js?var=[hash]",
-          chunkFilename: "[id].[name].js?ver=[hash]",
+          filename: "[name].js?var=[contenthash]",
+          chunkFilename: "[id].[name].js?ver=[contenthash]",
         },
       },
     );
@@ -508,8 +508,8 @@ describe("CompressionPlugin", () => {
       {
         output: {
           path: `${__dirname}/dist`,
-          filename: "[name].js?var=[hash]",
-          chunkFilename: "[id].[name].js?ver=[hash]",
+          filename: "[name].js?var=[contenthash]",
+          chunkFilename: "[id].[name].js?ver=[contenthash]",
         },
       },
     );

test/__snapshots__/CompressionPlugin.test.js.snap

@@ -1319,10 +1319,10 @@ exports[`CompressionPlugin should work child compilations: assets 1`] = `
     },
   ],
   [
-    "async.async.js?ver=59fa7d38343840d3f6ca",
+    "async.async.js?ver=cd3aed5809a2faa4eb5a",
     194,
     {
-      "fullhash": "59fa7d38343840d3f6ca",
+      "contenthash": "cd3aed5809a2faa4eb5a",
       "immutable": true,
       "javascriptModule": false,
       "related": {
@@ -1352,24 +1352,24 @@ exports[`CompressionPlugin should work child compilations: assets 1`] = `
   ],
   [
     "main.js.gz",
-    4042,
+    4018,
     {
       "compressed": true,
       "immutable": true,
-      "size": 4042,
+      "size": 4018,
     },
   ],
   [
-    "main.js?var=59fa7d38343840d3f6ca",
-    16258,
+    "main.js?var=87e4bf99b728fffc08a0",
+    16101,
     {
-      "fullhash": "59fa7d38343840d3f6ca",
+      "contenthash": "87e4bf99b728fffc08a0",
       "immutable": true,
       "javascriptModule": false,
       "related": {
         "gzipped": "main.js.gz",
       },
-      "size": 16258,
+      "size": 16101,
     },
   ],
 ]
@@ -1511,10 +1511,10 @@ exports[`CompressionPlugin should work with assets info: assets 1`] = `
     },
   ],
   [
-    "async.async.js?ver=e30bb673a67a1e8f00d2",
+    "async.async.js?ver=ff0ad4032ae148f14da4",
     194,
     {
-      "fullhash": "e30bb673a67a1e8f00d2",
+      "contenthash": "ff0ad4032ae148f14da4",
       "immutable": true,
       "javascriptModule": false,
       "related": {
@@ -1544,44 +1544,44 @@ exports[`CompressionPlugin should work with assets info: assets 1`] = `
   ],
   [
     "main.js.gz",
-    4078,
+    4070,
     {
       "compressed": true,
       "immutable": true,
-      "size": 4078,
+      "size": 4070,
     },
   ],
   [
     "main.js.map.gz",
-    4164,
+    4158,
     {
       "compressed": true,
-      "size": 4164,
+      "size": 4158,
     },
   ],
   [
-    "main.js.map?var=e30bb673a67a1e8f00d2",
-    13212,
+    "main.js.map?var=73bfdc1831ffc69a2d3f",
+    13104,
     {
       "development": true,
       "related": {
         "gzipped": "main.js.map.gz",
       },
-      "size": 13212,
+      "size": 13104,
     },
   ],
   [
-    "main.js?var=e30bb673a67a1e8f00d2",
-    16319,
+    "main.js?var=73bfdc1831ffc69a2d3f",
+    16162,
     {
-      "fullhash": "e30bb673a67a1e8f00d2",
+      "contenthash": "73bfdc1831ffc69a2d3f",
       "immutable": true,
       "javascriptModule": false,
       "related": {
         "gzipped": "main.js.gz",
-        "sourceMap": "main.js.map?var=e30bb673a67a1e8f00d2",
+        "sourceMap": "main.js.map?var=73bfdc1831ffc69a2d3f",
       },
-      "size": 16319,
+      "size": 16162,
     },
   ],
 ]
@@ -1712,10 +1712,10 @@ exports[`CompressionPlugin should work with multiple plugins: assets 1`] = `
     },
   ],
   [
-    "async.async.js?ver=5bff95cff1ab52803d05",
+    "async.async.js?ver=cd3aed5809a2faa4eb5a",
     194,
     {
-      "fullhash": "5bff95cff1ab52803d05",
+      "contenthash": "cd3aed5809a2faa4eb5a",
       "immutable": true,
       "javascriptModule": false,
       "related": {
@@ -1729,45 +1729,45 @@ exports[`CompressionPlugin should work with multiple plugins: assets 1`] = `
   ],
   [
     "main.js.br",
-    3538,
+    3514,
     {
       "compressed": true,
       "immutable": true,
-      "size": 3538,
+      "size": 3514,
     },
   ],
   [
     "main.js.compress",
-    16261,
+    16104,
     {
       "compressed": true,
       "immutable": true,
-      "size": 16261,
+      "size": 16104,
     },
   ],
   [
     "main.js.custom?foo=bar#hash",
-    16261,
+    16104,
     {
       "compressed": true,
       "immutable": true,
-      "size": 16261,
+      "size": 16104,
     },
   ],
   [
     "main.js.gz",
-    4045,
+    4021,
     {
       "compressed": true,
       "immutable": true,
-      "size": 4045,
+      "size": 4021,
     },
   ],
   [
-    "main.js?var=5bff95cff1ab52803d05",
-    16261,
+    "main.js?var=6d8b5bc920f6f6bff225",
+    16104,
     {
-      "fullhash": "5bff95cff1ab52803d05",
+      "contenthash": "6d8b5bc920f6f6bff225",
       "immutable": true,
       "javascriptModule": false,
       "related": {
@@ -1776,7 +1776,7 @@ exports[`CompressionPlugin should work with multiple plugins: assets 1`] = `
         "customed": "main.js.custom?foo=bar#hash",
         "gzipped": "main.js.gz",
       },
-      "size": 16261,
+      "size": 16104,
     },
   ],
 ]
@@ -1828,10 +1828,10 @@ exports[`CompressionPlugin should work: assets 1`] = `
     },
   ],
   [
-    "async.async.js?ver=5bff95cff1ab52803d05",
+    "async.async.js?ver=cd3aed5809a2faa4eb5a",
     194,
     {
-      "fullhash": "5bff95cff1ab52803d05",
+      "contenthash": "cd3aed5809a2faa4eb5a",
       "immutable": true,
       "javascriptModule": false,
       "related": {
@@ -1842,24 +1842,24 @@ exports[`CompressionPlugin should work: assets 1`] = `
   ],
   [
     "main.js.gz",
-    4045,
+    4021,
     {
       "compressed": true,
       "immutable": true,
-      "size": 4045,
+      "size": 4021,
     },
   ],
   [
-    "main.js?var=5bff95cff1ab52803d05",
-    16261,
+    "main.js?var=6d8b5bc920f6f6bff225",
+    16104,
     {
-      "fullhash": "5bff95cff1ab52803d05",
+      "contenthash": "6d8b5bc920f6f6bff225",
       "immutable": true,
       "javascriptModule": false,
       "related": {
         "gzipped": "main.js.gz",
       },
-      "size": 16261,
+      "size": 16104,
     },
   ],
 ]