feat: implement option for `HashedModuleIdes` plugin

lib/WebpackOptionsApply.js

@@ -56,6 +56,7 @@ const RuntimeChunkPlugin = require("./optimize/RuntimeChunkPlugin");
 const NoEmitOnErrorsPlugin = require("./NoEmitOnErrorsPlugin");
 const NamedModulesPlugin = require("./NamedModulesPlugin");
 const NamedChunksPlugin = require("./NamedChunksPlugin");
+const HashedModuleIdsPlugin = require("./HashedModuleIdsPlugin");
 const DefinePlugin = require("./DefinePlugin");
 const SizeLimitsPlugin = require("./performance/SizeLimitsPlugin");
 
@@ -328,6 +329,8 @@ class WebpackOptionsApply extends OptionsApply {
 			new NoEmitOnErrorsPlugin().apply(compiler);
 		if (options.optimization.namedModules)
 			new NamedModulesPlugin().apply(compiler);
+		if (options.optimization.hashedModuleIds)
+			new HashedModuleIdsPlugin().apply(compiler);
 		if (options.optimization.namedChunks)
 			new NamedChunksPlugin().apply(compiler);
 		if (options.optimization.nodeEnv) {

lib/WebpackOptionsDefaulter.js

@@ -258,6 +258,8 @@ class WebpackOptionsDefaulter extends OptionsDefaulter {
 			"make",
 			options => options.mode === "development"
 		);
+		// TODO enable for production mode in webpack 5
+		this.set("optimization.hashedModuleIds", false);
 		this.set(
 			"optimization.namedChunks",
 			"make",

schemas/WebpackOptions.json

@@ -1546,6 +1546,10 @@
           "description": "Use readable module identifiers for better debugging",
           "type": "boolean"
         },
+        "hashedModuleIds": {
+          "description": "Use hashed module id instead module identifiers for better long term caching",
+          "type": "boolean"
+        },
         "namedChunks": {
           "description": "Use readable chunk identifiers for better debugging",
           "type": "boolean"

test/TestCases.template.js

@@ -29,6 +29,7 @@ const DEFAULT_OPTIMIZATIONS = {
 	noEmitOnErrors: false,
 	concatenateModules: false,
 	namedModules: false,
+	hashedModuleIds: false,
 	minimizer: [uglifyJsForTesting]
 };
 

test/configCases/optimization/hashed-module-ids/files/file1.js

@@ -0,0 +1 @@
+module.exports = module.id;

test/configCases/optimization/hashed-module-ids/files/file2.js

@@ -0,0 +1 @@
+module.exports = module.id;

test/configCases/optimization/hashed-module-ids/files/file3.js

@@ -0,0 +1 @@
+module.exports = module.id;

test/configCases/optimization/hashed-module-ids/files/file4.js

@@ -0,0 +1 @@
+module.exports = module.id;

test/configCases/optimization/hashed-module-ids/files/file5.js

@@ -0,0 +1 @@
+module.exports = module.id;

test/configCases/optimization/hashed-module-ids/index.js

@@ -0,0 +1,10 @@
+var path = require("path");
+
+it("should have named modules ids", function() {
+	for (var i = 1; i <= 5; i++) {
+		var expectedModuleId = "file" + i + ".js";
+		var moduleId = require("./files/file" + i + ".js");
+
+		expect(path.basename(moduleId)).not.toBe(expectedModuleId);
+	}
+});

test/configCases/optimization/hashed-module-ids/webpack.config.js

@@ -0,0 +1,5 @@
+module.exports = {
+	optimization: {
+		hashedModuleIds: true
+	}
+};

test/configCases/optimization/named-modules/files/file1.js

@@ -0,0 +1 @@
+module.exports = module.id;

test/configCases/optimization/named-modules/files/file2.js

@@ -0,0 +1 @@
+module.exports = module.id;

test/configCases/optimization/named-modules/files/file3.js

@@ -0,0 +1 @@
+module.exports = module.id;

test/configCases/optimization/named-modules/files/file4.js

@@ -0,0 +1 @@
+module.exports = module.id;

test/configCases/optimization/named-modules/files/file5.js

@@ -0,0 +1 @@
+module.exports = module.id;

test/configCases/optimization/named-modules/index.js

@@ -0,0 +1,10 @@
+var path = require("path");
+
+it("should have named modules ids", function() {
+	for (var i = 1; i <= 5; i++) {
+		var expectedModuleId = "file" + i + ".js";
+		var moduleId = require("./files/file" + i + ".js");
+
+		expect(path.basename(moduleId)).toBe(expectedModuleId);
+	}
+});

test/configCases/optimization/named-modules/webpack.config.js

@@ -0,0 +1,5 @@
+module.exports = {
+	optimization: {
+		namedModules: true
+	}
+};