Merge branch 'mg-fix-sourcemaps-env' into 'master'

Fix webpack config to account for `NO_SOURCEMAPS=false`

See merge request gitlab-org/gitlab!33896

config/webpack.config.js

@@ -19,10 +19,11 @@ const IS_EE = require('./helpers/is_ee_env');
 const DEV_SERVER_HOST = process.env.DEV_SERVER_HOST || 'localhost';
 const DEV_SERVER_PORT = parseInt(process.env.DEV_SERVER_PORT, 10) || 3808;
 const DEV_SERVER_LIVERELOAD = IS_DEV_SERVER && process.env.DEV_SERVER_LIVERELOAD !== 'false';
-const WEBPACK_REPORT = process.env.WEBPACK_REPORT;
-const WEBPACK_MEMORY_TEST = process.env.WEBPACK_MEMORY_TEST;
-const NO_COMPRESSION = process.env.NO_COMPRESSION;
-const NO_SOURCEMAPS = process.env.NO_SOURCEMAPS;
+const WEBPACK_REPORT = process.env.WEBPACK_REPORT && process.env.WEBPACK_REPORT !== 'false';
+const WEBPACK_MEMORY_TEST =
+  process.env.WEBPACK_MEMORY_TEST && process.env.WEBPACK_MEMORY_TEST !== 'false';
+const NO_COMPRESSION = process.env.NO_COMPRESSION && process.env.NO_COMPRESSION !== 'false';
+const NO_SOURCEMAPS = process.env.NO_SOURCEMAPS && process.env.NO_SOURCEMAPS !== 'false';
 
 const VUE_VERSION = require('vue/package.json').version;
 const VUE_LOADER_VERSION = require('vue-loader/package.json').version;