From 62a5cd343c93c6911ba43c0f66acfda1fe19f2e6 Mon Sep 17 00:00:00 2001
From: Sergey Biryukov <sergeybiryukov@git.wordpress.org>
Date: Tue, 18 Dec 2018 03:13:58 +0000
Subject: [PATCH] Build Tools: Don't include `.map` files in the build.

These files are fairly large, and while they're useful in development, they're not needed in the final build.

Props pento, mcsf.
Merges [43931] and [43932] to trunk.
See #45201.

git-svn-id: https://develop.svn.wordpress.org/trunk@44282 602fd350-edb4-49c9-b593-d223f7449a82
---
 Gruntfile.js              | 7 ++++++-
 tools/webpack/packages.js | 8 ++++++++
 2 files changed, 14 insertions(+), 1 deletion(-)

diff --git a/Gruntfile.js b/Gruntfile.js
index fdf4d86b03..05f25ac56d 100644
--- a/Gruntfile.js
+++ b/Gruntfile.js
@@ -105,7 +105,11 @@ module.exports = function(grunt) {
 		clean: {
 			plugins: [BUILD_DIR + 'wp-content/plugins'],
 			themes: [BUILD_DIR + 'wp-content/themes'],
-			all: cleanFiles,
+			all: [
+				cleanFiles,
+				SOURCE_DIR + 'wp-includes/js/dist',
+				SOURCE_DIR + 'wp-includes/css/dist'
+			],
 			js: [BUILD_DIR + 'wp-admin/js/', BUILD_DIR + 'wp-includes/js/'],
 			dynamic: {
 				dot: true,
@@ -138,6 +142,7 @@ module.exports = function(grunt) {
 							'!js/**', // JavaScript is extracted into separate copy tasks.
 							'!.{svn,git}', // Exclude version control folders.
 							'!wp-includes/version.php', // Exclude version.php
+							'!**/*.map', // The build doesn't need .map files.
 							'!index.php', '!wp-admin/index.php',
 							'!_index.php', '!wp-admin/_index.php'
 						] ),
diff --git a/tools/webpack/packages.js b/tools/webpack/packages.js
index 76dfcce9bd..d2ab0d5e51 100644
--- a/tools/webpack/packages.js
+++ b/tools/webpack/packages.js
@@ -268,6 +268,14 @@ module.exports = function( env = { environment: 'production', watch: false, forc
 		config.devtool = process.env.SOURCEMAP || 'source-map';
 	}
 
+	if ( env.forceBuildTarget ) {
+		delete config.devtool;
+		config.mode = 'production';
+		config.optimization = {
+			minimize: false
+		};
+	}
+
 	if ( config.mode === 'development' ) {
 		config.plugins.push( new LiveReloadPlugin( { port: process.env.WORDPRESS_LIVE_RELOAD_PORT || 35729 } ) );
 	}