Dependency Extraction Webpack Plugin: Make the plugin work when using optimizations.runtimeChunk = 'single'

packages/dependency-extraction-webpack-plugin/README.md

@@ -107,6 +107,13 @@ module.exports = {
 
 The output format for the generated asset file. There are two options available: 'php' or 'json'.
 
+##### `outputFilename`
+
+- Type: string | function
+- Default: null
+
+The filename for the generated asset file. Accepts the same values as the Webpack `output.filename` option.
+
 ##### `combineAssets`
 
 -   Type: boolean

packages/dependency-extraction-webpack-plugin/lib/index.js

@@ -28,6 +28,7 @@ class DependencyExtractionWebpackPlugin {
 				externalizedReport: false,
 				injectPolyfill: false,
 				outputFormat: 'php',
+				outputFilename: null,
 				useDefaults: true,
 			},
 			options
@@ -143,6 +144,7 @@ class DependencyExtractionWebpackPlugin {
 			externalizedReport,
 			injectPolyfill,
 			outputFormat,
+			outputFilename,
 		} = this.options;
 
 		// Dump actually externalized dependencies to a report file.
@@ -196,12 +198,14 @@ class DependencyExtractionWebpackPlugin {
 				}
 			}
 
-			const runtimeChunk = entrypoint.getRuntimeChunk();
+			const entrypointChunk = isWebpack4
+				? entrypoint.chunks.find( ( c ) => c.name === entrypointName )
+				: entrypoint.getEntrypointChunk();
 
 			const assetData = {
 				// Get a sorted array so we can produce a stable, stringified representation.
 				dependencies: Array.from( entrypointExternalizedWpDeps ).sort(),
-				version: runtimeChunk.hash,
+				version: entrypointChunk.hash,
 			};
 
 			const assetString = this.stringify( assetData );
@@ -211,7 +215,7 @@ class DependencyExtractionWebpackPlugin {
 			const buildFilename = compilation.getPath(
 				compiler.options.output.filename,
 				{
-					chunk: runtimeChunk,
+					chunk: entrypointChunk,
 					filename,
 					query,
 					basename: basename( filename ),
@@ -226,14 +230,30 @@ class DependencyExtractionWebpackPlugin {
 				continue;
 			}
 
-			const assetFilename = buildFilename.replace(
-				/\.js$/i,
-				'.asset.' + ( outputFormat === 'php' ? 'php' : 'json' )
-			);
+			let assetFilename;
+
+			if ( outputFilename ) {
+				assetFilename = compilation.getPath( outputFilename, {
+					chunk: entrypointChunk,
+					filename,
+					query,
+					basename: basename( filename ),
+					contentHash: createHash( 'md4' )
+						.update( assetString )
+						.digest( 'hex' ),
+				} );
+			} else {
+				assetFilename = buildFilename.replace(
+					/\.js$/i,
+					'.asset.' + ( outputFormat === 'php' ? 'php' : 'json' )
+				);
+			}
 
 			// Add source and file into compilation for webpack to output.
 			compilation.assets[ assetFilename ] = new RawSource( assetString );
-			runtimeChunk.files[ isWebpack4 ? 'push' : 'add' ]( assetFilename );
+			entrypointChunk.files[ isWebpack4 ? 'push' : 'add' ](
+				assetFilename
+			);
 		}
 
 		if ( combineAssets ) {

packages/dependency-extraction-webpack-plugin/lib/types.d.ts

@@ -11,6 +11,7 @@ declare interface DependencyExtractionWebpackPluginOptions {
 	injectPolyfill?: boolean;
 	useDefaults?: boolean;
 	outputFormat?: 'php' | 'json';
+	outputFilename?: string | Function,
 	requestToExternal?: ( request: string ) => string | string[] | undefined;
 	requestToHandle?: ( request: string ) => string | undefined;
 	combinedOutputFile?: string | null;

packages/dependency-extraction-webpack-plugin/test/__snapshots__/build.js.snap

@@ -1,6 +1,6 @@
 // Jest Snapshot v1, https://goo.gl/fbAQLP
 
-exports[`Webpack \`combine-assets\` should produce expected output: Asset file should match snapshot 1`] = `"<?php return array('fileA.js' => array('dependencies' => array('lodash', 'wp-blob'), 'version' => 'bedcdcf40ea252047201aa0ee74a9377'), 'fileB.js' => array('dependencies' => array('wp-token-list'), 'version' => 'bec6f52af59733fff68cf46dbce8e226'));"`;
+exports[`Webpack \`combine-assets\` should produce expected output: Asset file 'assets.php' should match snapshot 1`] = `"<?php return array('fileA.js' => array('dependencies' => array('lodash', 'wp-blob'), 'version' => 'bedcdcf40ea252047201aa0ee74a9377'), 'fileB.js' => array('dependencies' => array('wp-token-list'), 'version' => 'bec6f52af59733fff68cf46dbce8e226'));"`;
 
 exports[`Webpack \`combine-assets\` should produce expected output: External modules should match snapshot 1`] = `
 Array [
@@ -28,7 +28,7 @@ Array [
 ]
 `;
 
-exports[`Webpack \`dynamic-import\` should produce expected output: Asset file should match snapshot 1`] = `"<?php return array('dependencies' => array('lodash', 'wp-blob'), 'version' => 'd56d3ad4bd3fcf9605c3d640d369cde4');"`;
+exports[`Webpack \`dynamic-import\` should produce expected output: Asset file 'main.asset.php' should match snapshot 1`] = `"<?php return array('dependencies' => array('lodash', 'wp-blob'), 'version' => 'd56d3ad4bd3fcf9605c3d640d369cde4');"`;
 
 exports[`Webpack \`dynamic-import\` should produce expected output: External modules should match snapshot 1`] = `
 Array [
@@ -48,7 +48,7 @@ Array [
 ]
 `;
 
-exports[`Webpack \`function-output-filename\` should produce expected output: Asset file should match snapshot 1`] = `"<?php return array('dependencies' => array('lodash', 'wp-blob'), 'version' => '844c4b1f2a6db3a13416e9ea339e6334');"`;
+exports[`Webpack \`function-output-filename\` should produce expected output: Asset file 'chunk--main--main.asset.php' should match snapshot 1`] = `"<?php return array('dependencies' => array('lodash', 'wp-blob'), 'version' => '844c4b1f2a6db3a13416e9ea339e6334');"`;
 
 exports[`Webpack \`function-output-filename\` should produce expected output: External modules should match snapshot 1`] = `
 Array [
@@ -68,7 +68,7 @@ Array [
 ]
 `;
 
-exports[`Webpack \`has-extension-suffix\` should produce expected output: Asset file should match snapshot 1`] = `"<?php return array('dependencies' => array('lodash', 'wp-blob'), 'version' => 'c35663ec29b695840a3c52d6fcc041c3');"`;
+exports[`Webpack \`has-extension-suffix\` should produce expected output: Asset file 'index.min.asset.php' should match snapshot 1`] = `"<?php return array('dependencies' => array('lodash', 'wp-blob'), 'version' => 'c35663ec29b695840a3c52d6fcc041c3');"`;
 
 exports[`Webpack \`has-extension-suffix\` should produce expected output: External modules should match snapshot 1`] = `
 Array [
@@ -88,15 +88,55 @@ Array [
 ]
 `;
 
-exports[`Webpack \`no-default\` should produce expected output: Asset file should match snapshot 1`] = `"<?php return array('dependencies' => array(), 'version' => 'feb97b1f3aec28878f5872b60f37567b');"`;
+exports[`Webpack \`no-default\` should produce expected output: Asset file 'main.asset.php' should match snapshot 1`] = `"<?php return array('dependencies' => array(), 'version' => 'feb97b1f3aec28878f5872b60f37567b');"`;
 
 exports[`Webpack \`no-default\` should produce expected output: External modules should match snapshot 1`] = `Array []`;
 
-exports[`Webpack \`no-deps\` should produce expected output: Asset file should match snapshot 1`] = `"<?php return array('dependencies' => array(), 'version' => 'd77fa1fabdfc18f9520a9325e0768b24');"`;
+exports[`Webpack \`no-deps\` should produce expected output: Asset file 'main.asset.php' should match snapshot 1`] = `"<?php return array('dependencies' => array(), 'version' => 'd77fa1fabdfc18f9520a9325e0768b24');"`;
 
 exports[`Webpack \`no-deps\` should produce expected output: External modules should match snapshot 1`] = `Array []`;
 
-exports[`Webpack \`output-format-json\` should produce expected output: Asset file should match snapshot 1`] = `"{\\"dependencies\\":[\\"lodash\\"],\\"version\\":\\"c0593f49cf023b00b43d085327cd4e3b\\"}"`;
+exports[`Webpack \`option-function-output-filename\` should produce expected output: Asset file 'chunk--main--main.asset.php' should match snapshot 1`] = `"<?php return array('dependencies' => array('lodash', 'wp-blob'), 'version' => '844c4b1f2a6db3a13416e9ea339e6334');"`;
+
+exports[`Webpack \`option-function-output-filename\` should produce expected output: External modules should match snapshot 1`] = `
+Array [
+  Object {
+    "externalType": "window",
+    "request": "lodash",
+    "userRequest": "lodash",
+  },
+  Object {
+    "externalType": "window",
+    "request": Array [
+      "wp",
+      "blob",
+    ],
+    "userRequest": "@wordpress/blob",
+  },
+]
+`;
+
+exports[`Webpack \`option-output-filename\` should produce expected output: Asset file 'main-foo.asset.php' should match snapshot 1`] = `"<?php return array('dependencies' => array('lodash', 'wp-blob'), 'version' => '844c4b1f2a6db3a13416e9ea339e6334');"`;
+
+exports[`Webpack \`option-output-filename\` should produce expected output: External modules should match snapshot 1`] = `
+Array [
+  Object {
+    "externalType": "window",
+    "request": "lodash",
+    "userRequest": "lodash",
+  },
+  Object {
+    "externalType": "window",
+    "request": Array [
+      "wp",
+      "blob",
+    ],
+    "userRequest": "@wordpress/blob",
+  },
+]
+`;
+
+exports[`Webpack \`output-format-json\` should produce expected output: Asset file 'main.asset.json' should match snapshot 1`] = `"{\\"dependencies\\":[\\"lodash\\"],\\"version\\":\\"c0593f49cf023b00b43d085327cd4e3b\\"}"`;
 
 exports[`Webpack \`output-format-json\` should produce expected output: External modules should match snapshot 1`] = `
 Array [
@@ -108,7 +148,7 @@ Array [
 ]
 `;
 
-exports[`Webpack \`overrides\` should produce expected output: Asset file should match snapshot 1`] = `"<?php return array('dependencies' => array('wp-blob', 'wp-script-handle-for-rxjs', 'wp-url'), 'version' => '90aabe80a22b120d4ce792caba9e2238');"`;
+exports[`Webpack \`overrides\` should produce expected output: Asset file 'main.asset.php' should match snapshot 1`] = `"<?php return array('dependencies' => array('wp-blob', 'wp-script-handle-for-rxjs', 'wp-url'), 'version' => '90aabe80a22b120d4ce792caba9e2238');"`;
 
 exports[`Webpack \`overrides\` should produce expected output: External modules should match snapshot 1`] = `
 Array [
@@ -144,7 +184,29 @@ Array [
 ]
 `;
 
-exports[`Webpack \`wordpress\` should produce expected output: Asset file should match snapshot 1`] = `"<?php return array('dependencies' => array('lodash', 'wp-blob'), 'version' => '844c4b1f2a6db3a13416e9ea339e6334');"`;
+exports[`Webpack \`runtime-chunk-single\` should produce expected output: Asset file 'a.asset.php' should match snapshot 1`] = `"<?php return array('dependencies' => array('wp-blob'), 'version' => '8f74c54ba0be0fd357a8594c9eda1f35');"`;
+
+exports[`Webpack \`runtime-chunk-single\` should produce expected output: Asset file 'b.asset.php' should match snapshot 1`] = `"<?php return array('dependencies' => array('lodash', 'wp-blob'), 'version' => '4ad01639f1af1b6624a0d18cbb94e4e6');"`;
+
+exports[`Webpack \`runtime-chunk-single\` should produce expected output: External modules should match snapshot 1`] = `
+Array [
+  Object {
+    "externalType": "window",
+    "request": "lodash",
+    "userRequest": "lodash",
+  },
+  Object {
+    "externalType": "window",
+    "request": Array [
+      "wp",
+      "blob",
+    ],
+    "userRequest": "@wordpress/blob",
+  },
+]
+`;
+
+exports[`Webpack \`wordpress\` should produce expected output: Asset file 'main.asset.php' should match snapshot 1`] = `"<?php return array('dependencies' => array('lodash', 'wp-blob'), 'version' => '844c4b1f2a6db3a13416e9ea339e6334');"`;
 
 exports[`Webpack \`wordpress\` should produce expected output: External modules should match snapshot 1`] = `
 Array [
@@ -164,7 +226,7 @@ Array [
 ]
 `;
 
-exports[`Webpack \`wordpress-require\` should produce expected output: Asset file should match snapshot 1`] = `"<?php return array('dependencies' => array('lodash', 'wp-blob'), 'version' => '2a613fdd9e36fb13cd706b2d42a66ba3');"`;
+exports[`Webpack \`wordpress-require\` should produce expected output: Asset file 'main.asset.php' should match snapshot 1`] = `"<?php return array('dependencies' => array('lodash', 'wp-blob'), 'version' => '2a613fdd9e36fb13cd706b2d42a66ba3');"`;
 
 exports[`Webpack \`wordpress-require\` should produce expected output: External modules should match snapshot 1`] = `
 Array [

packages/dependency-extraction-webpack-plugin/test/build.js

@@ -61,9 +61,13 @@ describe.each( configFixtures )( 'Webpack `%s`', ( configCase ) => {
 
 				// Asset files should match.
 				assetFiles.forEach( ( assetFile ) => {
+					const assetBasename = path.basename( assetFile );
+
 					expect(
 						fs.readFileSync( assetFile, 'utf-8' )
-					).toMatchSnapshot( 'Asset file should match snapshot' );
+					).toMatchSnapshot(
+						`Asset file '${ assetBasename }' should match snapshot`
+					);
 				} );
 
 				const compareByModuleIdentifier = ( m1, m2 ) => {

packages/dependency-extraction-webpack-plugin/test/fixtures/option-function-output-filename/index.js

@@ -0,0 +1,11 @@
+/**
+ * WordPress dependencies
+ */
+import { isBlobURL } from '@wordpress/blob';
+
+/**
+ * External dependencies
+ */
+import _ from 'lodash';
+
+_.isEmpty( isBlobURL( '' ) );

packages/dependency-extraction-webpack-plugin/test/fixtures/option-function-output-filename/webpack.config.js

@@ -0,0 +1,14 @@
+/**
+ * Internal dependencies
+ */
+const DependencyExtractionWebpackPlugin = require( '../../..' );
+
+module.exports = {
+	plugins: [
+		new DependencyExtractionWebpackPlugin( {
+			outputFilename( chunkData ) {
+				return `chunk--${ chunkData.chunk.name }--[name].asset.php`;
+			},
+		} ),
+	],
+};

packages/dependency-extraction-webpack-plugin/test/fixtures/option-output-filename/index.js

@@ -0,0 +1,11 @@
+/**
+ * WordPress dependencies
+ */
+import { isBlobURL } from '@wordpress/blob';
+
+/**
+ * External dependencies
+ */
+import _ from 'lodash';
+
+_.isEmpty( isBlobURL( '' ) );

packages/dependency-extraction-webpack-plugin/test/fixtures/option-output-filename/webpack.config.js

@@ -0,0 +1,12 @@
+/**
+ * Internal dependencies
+ */
+const DependencyExtractionWebpackPlugin = require( '../../..' );
+
+module.exports = {
+	plugins: [
+		new DependencyExtractionWebpackPlugin( {
+			outputFilename: '[name]-foo.asset.php',
+		} ),
+	],
+};

packages/dependency-extraction-webpack-plugin/test/fixtures/runtime-chunk-single/a.js

@@ -0,0 +1,12 @@
+/**
+ * WordPress dependencies
+ */
+import { isBlobURL } from '@wordpress/blob';
+
+/**
+ * External dependencies
+ */
+import atob from 'atob';
+
+isBlobURL( '' );
+atob( 'SGVsbG8sIFdvcmxkIQ==' );

packages/dependency-extraction-webpack-plugin/test/fixtures/runtime-chunk-single/b.js

@@ -0,0 +1,11 @@
+/**
+ * WordPress dependencies
+ */
+import { isBlobURL } from '@wordpress/blob';
+
+/**
+ * External dependencies
+ */
+import _ from 'lodash';
+
+_.isEmpty( isBlobURL( '' ) );

packages/dependency-extraction-webpack-plugin/test/fixtures/runtime-chunk-single/webpack.config.js

@@ -0,0 +1,15 @@
+/**
+ * Internal dependencies
+ */
+const DependencyExtractionWebpackPlugin = require( '../../..' );
+
+module.exports = {
+	entry: {
+		a: './a',
+		b: './b',
+	},
+	plugins: [ new DependencyExtractionWebpackPlugin() ],
+	optimization: {
+		runtimeChunk: 'single',
+	},
+};