Merge branch 'leipert-add-memory-info' into 'master'

Set `max_old_space_size` option of node to 3.5GB during compile:assets

See merge request gitlab-org/gitlab-ee!6071

.gitlab-ci.yml

@@ -529,7 +529,11 @@ compile-assets:
     - date
     - yarn install --frozen-lockfile --cache-folder .yarn-cache
     - date
+    - free -m
     - bundle exec rake gitlab:assets:compile
+  variables:
+    # we override the max_old_space_size to prevent OOM errors
+    NODE_OPTIONS: --max_old_space_size=3584
   artifacts:
     expire_in: 7d
     paths:
@@ -826,10 +830,13 @@ gitlab:assets:compile:
     SKIP_STORAGE_VALIDATION: "true"
     WEBPACK_REPORT: "true"
     NO_COMPRESSION: "true"
+    # we override the max_old_space_size to prevent OOM errors
+    NODE_OPTIONS: --max_old_space_size=3584
   script:
     - date
     - yarn install --frozen-lockfile --production --cache-folder .yarn-cache
     - date
+    - free -m
     - bundle exec rake gitlab:assets:compile
   artifacts:
     name: webpack-report

config/webpack.config.js

-const fs = require('fs');
 const path = require('path');
 const glob = require('glob');
 const webpack = require('webpack');
@@ -232,9 +231,7 @@ module.exports = {
     new VueLoaderPlugin(),
 
     // automatically configure monaco editor web workers
-    new MonacoWebpackPlugin({
-      features: [],
-    }),
+    new MonacoWebpackPlugin(),
 
     // prevent pikaday from including moment.js
     new webpack.IgnorePlugin(/moment/, /pikaday/),
@@ -302,7 +299,7 @@ module.exports = {
     inline: DEV_SERVER_LIVERELOAD,
   },
 
-  devtool: IS_PRODUCTION ? 'nosources-source-map' : 'cheap-module-eval-source-map',
+  devtool: IS_PRODUCTION ? 'source-map' : 'cheap-module-eval-source-map',
 
   // sqljs requires fs
   node: { fs: 'empty' },