Merge pull request #7812 from webpack/feature/orphan_modules

Hide orphan modules in Stats

lib/Stats.js

@@ -173,6 +173,10 @@ class Stats {
 			options.nestedModules,
 			true
 		);
+		const showOrphanModules = optionOrLocalFallback(
+			options.orphanModules,
+			false
+		);
 		const showModuleAssets = optionOrLocalFallback(
 			options.moduleAssets,
 			!forToString
@@ -225,16 +229,22 @@ class Stats {
 			!forToString
 		);
 
+		if (!showOrphanModules) {
+			excludeModules.push((ident, module, type) => {
+				return module.getNumberOfChunks() === 0 && type !== "nested";
+			});
+		}
+
 		if (!showCachedModules) {
 			excludeModules.push((ident, module) => !module.built);
 		}
 
-		const createModuleFilter = () => {
+		const createModuleFilter = type => {
 			let i = 0;
 			return module => {
 				if (excludeModules.length > 0) {
 					const ident = requestShortener.shorten(module.resource);
-					const excluded = excludeModules.some(fn => fn(ident, module));
+					const excluded = excludeModules.some(fn => fn(ident, module, type));
 					if (excluded) return false;
 				}
 				const result = i < maxModules;
@@ -492,7 +502,7 @@ class Stats {
 			obj.namedChunkGroups = fnChunkGroup(compilation.namedChunkGroups);
 		}
 
-		const fnModule = module => {
+		const fnModule = (module, nested) => {
 			const path = [];
 			const issuer = module.getIssuer(moduleGraph);
 			let current = issuer;
@@ -529,6 +539,9 @@ class Stats {
 				errors: module.errors ? module.errors.length : 0,
 				warnings: module.warnings ? module.warnings.length : 0
 			};
+			if (showOrphanModules && !nested) {
+				obj.orphan = module.getNumberOfChunks() === 0;
+			}
 			if (showModuleAssets) {
 				obj.assets = Object.keys(module.buildInfo.assets || {});
 			}
@@ -612,8 +625,8 @@ class Stats {
 					const modules = module.modules;
 					obj.modules = modules
 						.sort(sortByField("depth"))
-						.filter(createModuleFilter())
+						.filter(createModuleFilter("nested"))
-						.map(fnModule);
+						.map(m => fnModule(m, true));
 					obj.filteredModules = modules.length - obj.modules.length;
 					obj.modules.sort(sortByField(sortModules));
 				}
@@ -664,8 +677,8 @@ class Stats {
 					obj.modules = chunk
 						.getModules()
 						.sort(sortByField("depth"))
-						.filter(createModuleFilter())
+						.filter(createModuleFilter("chunk"))
-						.map(fnModule);
+						.map(m => fnModule(m));
 					obj.filteredModules = chunk.getNumberOfModules() - obj.modules.length;
 					obj.modules.sort(sortByField(sortModules));
 				}
@@ -713,8 +726,8 @@ class Stats {
 			obj.modules = compilation.modules
 				.slice()
 				.sort(sortByField("depth"))
-				.filter(createModuleFilter())
+				.filter(createModuleFilter("module"))
-				.map(fnModule);
+				.map(m => fnModule(m));
 			obj.filteredModules = compilation.modules.length - obj.modules.length;
 			obj.modules.sort(sortByField(sortModules));
 		}
@@ -1036,6 +1049,9 @@ class Stats {
 			if (module.cacheable === false) {
 				colors.red(" [not cacheable]");
 			}
+			if (module.orphan) {
+				colors.yellow(" [orphan]");
+			}
 			if (module.optional) {
 				colors.yellow(" [optional]");
 			}

schemas/WebpackOptions.json

@@ -1844,6 +1844,10 @@
               "type": "boolean",
               "description": "add built modules information"
             },
+            "orphanModules": {
+              "type": "boolean",
+              "description": "add information about orphan modules"
+            },
             "nestedModules": {
               "type": "boolean",
               "description": "add information about modules nested in other modules (like with module concatenation)"
@@ -1858,7 +1862,7 @@
             },
             "cached": {
               "type": "boolean",
-              "description": "add also information about cached (not built) modules"
+              "description": "add information about cached (not built) modules"
             },
             "cachedAssets": {
               "type": "boolean",

test/__snapshots__/StatsTestCases.test.js.snap

@@ -679,15 +679,15 @@ exports[`StatsTestCases should print correct stats for concat-and-sideeffects 1`
     | ./index.js 46 bytes [built]
     | ./node_modules/pmodule/a.js 49 bytes [built]
     | ./node_modules/pmodule/aa.js 24 bytes [built]
-./node_modules/pmodule/index.js 63 bytes [built]
+./node_modules/pmodule/index.js 63 bytes [orphan] [built]
     ModuleConcatenation bailout: Module is not in any chunk
-./node_modules/pmodule/b.js 49 bytes [built]
+./node_modules/pmodule/b.js 49 bytes [orphan] [built]
     ModuleConcatenation bailout: Module is not in any chunk
-./node_modules/pmodule/c.js 49 bytes [built]
+./node_modules/pmodule/c.js 49 bytes [orphan] [built]
     ModuleConcatenation bailout: Module is not in any chunk
-./node_modules/pmodule/bb.js 24 bytes [built]
+./node_modules/pmodule/bb.js 24 bytes [orphan] [built]
     ModuleConcatenation bailout: Module is not in any chunk
-./node_modules/pmodule/cc.js 24 bytes [built]
+./node_modules/pmodule/cc.js 24 bytes [orphan] [built]
     ModuleConcatenation bailout: Module is not in any chunk"
 `;
 
@@ -1097,7 +1097,7 @@ entry.js   8.46 KiB       0  [emitted]  entry
 Entrypoint entry = entry.js
 [0] ./entry.js 120 bytes {0} [built]
 [1] ./modules/b.js 22 bytes {1} [built]
-./modules/a.js 37 bytes [built]"
+    + 1 hidden module"
 `;
 
 exports[`StatsTestCases should print correct stats for import-with-invalid-options-comments 1`] = `
@@ -2247,20 +2247,20 @@ Entrypoint main = main.js
     | ./components/src/CompAB/CompB.js 77 bytes [built]
     |     [only some exports used: default]
     |     harmony import specifier ./components  ./main.js 4:15-20 (skipped side-effect-free modules)
-./components/src/index.js 84 bytes [built]
+./components/src/index.js 84 bytes [orphan] [built]
     [module unused]
     harmony side effect evaluation ./components [2] ./foo.js 1:0-37
     harmony side effect evaluation ./components [3] ./main.js + 1 modules 1:0-44
-./components/src/CompAB/index.js 87 bytes [built]
+./components/src/CompAB/index.js 87 bytes [orphan] [built]
     [module unused]
     harmony side effect evaluation ./CompAB  ./components/src/index.js 1:0-40
     harmony export imported specifier ./CompAB  ./components/src/index.js 1:0-40
     harmony export imported specifier ./CompAB  ./components/src/index.js 1:0-40
-./components/src/CompC/index.js 34 bytes [built]
+./components/src/CompC/index.js 34 bytes [orphan] [built]
     [module unused]
     harmony side effect evaluation ./CompC  ./components/src/index.js 2:0-43
     harmony export imported specifier ./CompC  ./components/src/index.js 2:0-43
-./components/src/CompC/CompC.js 33 bytes [built]
+./components/src/CompC/CompC.js 33 bytes [orphan] [built]
     [module unused]
     harmony side effect evaluation ./CompC  ./components/src/CompC/index.js 1:0-34
     harmony export imported specifier ./CompC  ./components/src/CompC/index.js 1:0-34"
@@ -2285,11 +2285,11 @@ Entrypoint main = main.js
     | ./node_modules/pmodule/c.js 28 bytes [built]
     |     [only some exports used: z]
     |     harmony import specifier pmodule  ./index.js 3:17-18 (skipped side-effect-free modules)
-./node_modules/pmodule/a.js 60 bytes [built]
+./node_modules/pmodule/a.js 60 bytes [orphan] [built]
     [module unused]
     harmony side effect evaluation ./a [0] ./index.js + 2 modules 1:0-20
     harmony export imported specifier ./a [0] ./index.js + 2 modules 1:0-20
-./node_modules/pmodule/b.js 69 bytes [built]
+./node_modules/pmodule/b.js 69 bytes [orphan] [built]
     [module unused]
     harmony side effect evaluation ./b [0] ./index.js + 2 modules 2:0-30
     harmony export imported specifier ./b [0] ./index.js + 2 modules 2:0-30

test/statsCases/concat-and-sideeffects/webpack.config.js

@@ -6,6 +6,7 @@ module.exports = {
 		all: false,
 		modules: true,
 		nestedModules: true,
+		orphanModules: true,
 		optimizationBailout: true
 	}
 };

test/statsCases/scope-hoisting-bailouts/webpack.config.js

@@ -12,6 +12,7 @@ module.exports = {
 	externals: ["external"],
 	stats: {
 		assets: false,
+		orphanModules: true,
 		optimizationBailout: true
 	}
 };

test/statsCases/scope-hoisting-multi/webpack.config.js

@@ -55,6 +55,7 @@ module.exports = [
 		},
 		stats: {
 			assets: false,
+			orphanModules: true,
 			optimizationBailout: true
 		}
 	}

test/statsCases/side-effects-issue-7428/webpack.config.js

@@ -7,6 +7,7 @@ module.exports = {
 		concatenateModules: true
 	},
 	stats: {
+		orphanModules: true,
 		nestedModules: true,
 		usedExports: true,
 		reasons: true

test/statsCases/side-effects-simple-unused/webpack.config.js

@@ -3,6 +3,7 @@ module.exports = {
 	optimization: { moduleIds: "natural", chunkIds: "natural" },
 	entry: "./index",
 	stats: {
+		orphanModules: true,
 		nestedModules: true,
 		usedExports: true,
 		reasons: true