WordPress · fullofcaffeine · Jun 10, 2021 · May 12, 2021 · May 12, 2021 · May 20, 2021
@@ -27,4 +27,4 @@ jobs:
             - uses: preactjs/compressed-size-action@7d87f60a6b0c7d193b8183ce859ed00b356ea92f # v2.1.0
               with:
                   repo-token: '${{ secrets.GITHUB_TOKEN }}'
-                  pattern: '{build/**/*.js,build/**/*.css}'
+                  pattern: '{build/**/*.min.js,build/**/*.css}'
@@ -1679,6 +1679,12 @@
 		"markdown_source": "../packages/react-native-editor/README.md",
 		"parent": "packages"
 	},
+	{
+		"title": "@wordpress/readable-js-assets-webpack-plugin",
+		"slug": "packages-readable-js-assets-webpack-plugin",
+		"markdown_source": "../packages/readable-js-assets-webpack-plugin/README.md",
+		"parent": "packages"
+	},
 	{
 		"title": "@wordpress/redux-routine",
 		"slug": "packages-redux-routine",

@@ -127,7 +127,7 @@ function gutenberg_override_translation_file( $file, $handle ) {
 	}
 
 	// Ignore scripts that are not found in the expected `build/` location.
-	$script_path = gutenberg_dir_path() . 'build/' . substr( $handle, 3 ) . '/index.js';
+	$script_path = gutenberg_dir_path() . 'build/' . substr( $handle, 3 ) . '/index.min.js';
 	if ( ! file_exists( $script_path ) ) {
 		return $file;
 	}
@@ -236,14 +236,15 @@ function gutenberg_register_packages_scripts( $scripts ) {
 	// When in production, use the plugin's version as the default asset version;
 	// else (for development or test) default to use the current time.
 	$default_version = defined( 'GUTENBERG_VERSION' ) && ! ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) ? GUTENBERG_VERSION : time();
+	$suffix          = ( defined( 'SCRIPT_DEBUG' ) && SCRIPT_DEBUG ) ? '.js' : '.min.js';
 
-	foreach ( glob( gutenberg_dir_path() . 'build/*/index.js' ) as $path ) {
+	foreach ( glob( gutenberg_dir_path() . "build/*/index$suffix" ) as $path ) {
 		// Prefix `wp-` to package directory to get script handle.
-		// For example, `…/build/a11y/index.js` becomes `wp-a11y`.
+		// For example, `…/build/a11y/index.min.js` becomes `wp-a11y`.
 		$handle = 'wp-' . basename( dirname( $path ) );
 
-		// Replace `.js` extension with `.asset.php` to find the generated dependencies file.
-		$asset_file   = substr( $path, 0, -3 ) . '.asset.php';
+		// Replace suffix and extension with `.asset.php` to find the generated dependencies file.
+		$asset_file   = substr( $path, 0, -( strlen( $suffix ) ) ) . '.asset.php';
 		$asset        = file_exists( $asset_file )
 			? require( $asset_file )
 			: null;

diff --git a/package-lock.json b/package-lock.json
diff --git a/package.json b/package.json
@@ -140,6 +140,7 @@
 		"@wordpress/postcss-themes": "file:packages/postcss-themes",
 		"@wordpress/prettier-config": "file:packages/prettier-config",
 		"@wordpress/project-management-automation": "file:packages/project-management-automation",
+		"@wordpress/readable-js-assets-webpack-plugin": "file:packages/readable-js-assets-webpack-plugin",
 		"@wordpress/scripts": "file:packages/scripts",
 		"@wordpress/stylelint-config": "file:packages/stylelint-config",
 		"appium": "1.20.2",

@@ -179,7 +179,7 @@ class DependencyExtractionWebpackPlugin {
 				}
 
 				const assetFilename = buildFilename.replace(
-					/\.js$/i,
+					/(\.min)?\.js$/i,
 					'.asset.' + ( outputFormat === 'php' ? 'php' : 'json' )
 				);
 

@@ -68,6 +68,26 @@ 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' => '99bd32161d8514cc8c0cb8b0543ace3f');"`;
+
+exports[`Webpack \`has-extension-suffix\` 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 \`no-default\` should produce expected output: Asset file should match snapshot 1`] = `"<?php return array('dependencies' => array(), 'version' => '7cedfbba436728640c2c4961b598ab32');"`;
 
 exports[`Webpack \`no-default\` should produce expected output: External modules should match snapshot 1`] = `Array []`;

@@ -0,0 +1,11 @@
+/**
+ * External dependencies
+ */
+import { isEmpty } from 'lodash';
+
+/**
+ * WordPress dependencies
+ */
+import { isBlobURL } from '@wordpress/blob';
+
+isEmpty( isBlobURL( '' ) );
@@ -0,0 +1,11 @@
+/**
+ * Internal dependencies
+ */
+const DependencyExtractionWebpackPlugin = require( '../../..' );
+
+module.exports = {
+	output: {
+		filename: 'index.min.js',
+	},
+	plugins: [ new DependencyExtractionWebpackPlugin() ],
+};
diff --git a/packages/readable-js-assets-webpack-plugin/.npmrc b/packages/readable-js-assets-webpack-plugin/.npmrc
@@ -0,0 +1 @@
+package-lock=false
diff --git a/packages/readable-js-assets-webpack-plugin/CHANGELOG.md b/packages/readable-js-assets-webpack-plugin/CHANGELOG.md
@@ -0,0 +1,5 @@
+<!-- Learn how to maintain this file at https://github.com/WordPress/gutenberg/tree/HEAD/packages#maintaining-changelogs. -->
+
+## Unreleased
+
+Initial release.
diff --git a/packages/readable-js-assets-webpack-plugin/README.md b/packages/readable-js-assets-webpack-plugin/README.md
@@ -0,0 +1,39 @@
+# Readable JS assets WebPack Plugin
+
+Generate a readable non-minified JS file for each `.min.js` asset.
+
+The end result is that for each JS entrypoint, we get a set of readable and non-minimized `.js` file and a minimized `.min.js`. This allows Gutenberg to follow the WordPress convention of adding a `.min.js` suffix to minimized JS files, while still providing a readable and unminized files that play well with the WordPress i18n machinery.
+
+Consult the [webpack website](https://webpack.js.org) for additional information on webpack concepts.
+
+## Installation
+
+Install the module
+
+```bash
+npm install @wordpress/readable-js-assets-webpack-plugin --save-dev
+```
+
+**Note**: This package requires Node.js 12.0.0 or later. It also requires webpack 4.8.3 and newer. It is not compatible with older versions.
+
+## Usage
+
+### Webpack
+
+Use this plugin as you would other webpack plugins:
+
+```js
+// webpack.config.js
+const ReadableJsAssetsWebpackPlugin = require( '@wordpress/readable-js-assets-webpack-plugin' );
+
+module.exports = {
+	// …snip
+	plugins: [ new ReadableJsAssetsWebpackPlugin() ],
+};
+```
+
+**Note:**
+- Multiple instances of the plugin are not supported and may produced unexpected results;
+- It assumes your webpack pipeline is already generating a `.min.js` JS asset file for each JS entry-point.
+
+<br/><br/><p align="center"><img src="https://s.w.org/style/images/codeispoetry.png?1" alt="Code is Poetry." /></p>
diff --git a/packages/readable-js-assets-webpack-plugin/index.js b/packages/readable-js-assets-webpack-plugin/index.js
@@ -0,0 +1,41 @@
+/**
+ * External dependencies
+ */
+const fs = require( 'fs' );
+const path = require( 'path' );
+
+class AddReadableJsAssetsWebpackPlugin {
+	extractUnminifiedFiles( compilation ) {
+		const files = compilation.chunks.flatMap( ( chunk ) => chunk.files );
+		compilation.unminifiedAssets = files.map( ( file ) => {
+			const asset = compilation.assets[ file ];
+			const unminifiedFile = file.replace( /\.min\.js$/, '.js' );
+			return [ unminifiedFile, asset.source() ];
+		} );
+	}
+	async writeUnminifiedFiles( compilation ) {
+		for ( const [ file, source ] of compilation.unminifiedAssets ) {
+			await fs.promises.writeFile(
+				path.join( compilation.options.output.path, file ),
+				source
+			);
+		}
+	}
+	apply( compiler ) {
+		compiler.hooks.compilation.tap(
+			this.constructor.name,
+			( compilation ) => {
+				compilation.hooks.additionalAssets.tap(
+					this.constructor.name,
+					() => this.extractUnminifiedFiles( compilation )
+				);
+			}
+		);
+		compiler.hooks.afterEmit.tapPromise(
+			this.constructor.name,
+			( compilation ) => this.writeUnminifiedFiles( compilation )
+		);
+	}
+}
+
+module.exports = AddReadableJsAssetsWebpackPlugin;
diff --git a/packages/readable-js-assets-webpack-plugin/package.json b/packages/readable-js-assets-webpack-plugin/package.json
@@ -0,0 +1,36 @@
+{
+	"name": "@wordpress/readable-js-assets-webpack-plugin",
+	"version": "1.0.0-prerelease",
+	"description": "Generate a readable JS file for each JS asset.",
+	"author": "The WordPress Contributors",
+	"license": "GPL-2.0-or-later",
+	"keywords": [
+		"wordpress",
+		"gutenberg",
+		"webpack",
+		"readable",
+		"minimizer"
+	],
+	"homepage": "https://github.com/WordPress/gutenberg/tree/HEAD/packages/readable-js-assets-webpack-plugin/README.md",
+	"repository": {
+		"type": "git",
+		"url": "https://github.com/WordPress/gutenberg.git",
+		"directory": "packages/readable-js-assets-webpack-plugin"
+	},
+	"bugs": {
+		"url": "https://github.com/WordPress/gutenberg/issues"
+	},
+	"engines": {
+		"node": ">=12.0"
+	},
+	"files": [
+    "index.js"
+	],
+	"main": "index.js",
+	"peerDependencies": {
+		"webpack": "^4.8.3 || ^5.0.0"
+	},
+	"publishConfig": {
+		"access": "public"
+	}
+}