Merge remote-tracking branch 'upstream/master' into 1819-override-ce

* upstream/master: (621 commits)
  Add a note about GitLab QA page objects validator to docs
  Refactor dispatcher projects blame and blob path
  Update export message to mention we can download the file from the UI
  Fix Ctrl+Enter keyboard shortcut saving comment/note edit
  fix case where tooltip messes up :last-child selector
  Add reason to keep postgresql 9.2 for CI
  Remove warning noise in ProjectImportOptions
  Add changelog entry
  Add RedirectRoute factory
  Update Ingress extra cost note to be more generic
  Fix Rubocop offense
  Refactor dispatcher project branches path
  Revert "Revert "Fix Route validation for unchanged path""
  Document that we need rsync for backing up
  Docs: move article "Laravel and Envoy w/ CI/CD"
  Recommend against the use of EFS
  Adds Rubocop rule for line break around conditionals
  Update CHANGELOG.md for 10.1.6
  Filter out build traces from logged parameters
  Refactored project:n* imports in dispatcher.js
  ...

1 files changed, 25 insertions, 5 deletions

diff --git a/config/webpack.config.js b/config/webpack.config.js
index 5f95255334c..95fa79990e2 100644
--- a/config/webpack.config.js
+++ b/config/webpack.config.js
@@ -1,5 +1,6 @@
 'use strict';
 
+var crypto = require('crypto');
 var fs = require('fs');
 var path = require('path');
 var webpack = require('webpack');
@@ -179,15 +180,34 @@ var config = {
       if (chunk.name) {
         return chunk.name;
       }
-      return chunk.mapModules((m) => {
+
+      const moduleNames = [];
+
+      function collectModuleNames(m) {
+        // handle ConcatenatedModule which does not have resource nor context set
+        if (m.modules) {
+          m.modules.forEach(collectModuleNames);
+          return;
+        }
+
         const pagesBase = path.join(ROOT_PATH, 'app/assets/javascripts/pages');
+
         if (m.resource.indexOf(pagesBase) === 0) {
-          return path.relative(pagesBase, m.resource)
+          moduleNames.push(path.relative(pagesBase, m.resource)
             .replace(/\/index\.[a-z]+$/, '')
-            .replace(/\//g, '__');
+            .replace(/\//g, '__'));
+        } else {
+          moduleNames.push(path.relative(m.context, m.resource));
         }
-        return path.relative(m.context, m.resource);
-      }).join('_');
+      }
+
+      chunk.forEachModule(collectModuleNames);
+
+      const hash = crypto.createHash('sha256')
+        .update(moduleNames.join('_'))
+        .digest('hex');
+
+      return `${moduleNames[0]}-${hash.substr(0, 6)}`;
     }),
 
     // create cacheable common library bundle for all vue chunks