[SE-3401] Webpack Hashes to use Md5Hash Plugin to be consistent among multiple instances

common/lib/xmodule/xmodule/static_content.py

@@ -74,7 +74,7 @@ class VideoBlock(HTMLSnippet):
 
 def write_module_styles(output_root):
     """Write all registered XModule css, sass, and scss files to output root."""
-    return _write_styles('.xmodule_display', output_root, sorted(_list_modules(), key=str), 'get_preview_view_css')
+    return _write_styles('.xmodule_display', output_root, _list_modules(), 'get_preview_view_css')
 
 
 def write_module_js(output_root):
@@ -94,20 +94,26 @@ def write_descriptor_js(output_root):
 
 def _list_descriptors():
     """Return a list of all registered XModuleDescriptor classes."""
-    return [
-        desc for desc in [
-            desc for (_, desc) in XModuleDescriptor.load_classes()
-        ]
-    ] + XBLOCK_CLASSES
+    return sorted(
+        [
+            desc for desc in [
+                desc for (_, desc) in XModuleDescriptor.load_classes()
+            ]
+        ] + XBLOCK_CLASSES,
+        key=str
+    )
 
 
 def _list_modules():
     """Return a list of all registered XModule classes."""
-    return [
-        desc.module_class for desc in [
-            desc for (_, desc) in XModuleDescriptor.load_classes()
-        ]
-    ] + XBLOCK_CLASSES
+    return sorted(
+        [
+            desc.module_class for desc in [
+                desc for (_, desc) in XModuleDescriptor.load_classes()
+            ]
+        ] + XBLOCK_CLASSES,
+        key=str
+    )
 
 
 def _ensure_dir(directory):
@@ -269,7 +275,13 @@ def write_webpack(output_file, module_files, descriptor_files):
         outfile.write(
             textwrap.dedent(u"""\
                 module.exports = {config_json};
-            """).format(config_json=json.dumps(config, indent=4))
+            """).format(
+                config_json=json.dumps(
+                    config,
+                    indent=4,
+                    sort_keys=True
+                )
+            )
         )
 
 

package.json

@@ -63,6 +63,7 @@
     "underscore.string": "3.3.5",
     "webpack": "2.7.0",
     "webpack-bundle-tracker": "0.2.1",
+    "webpack-md5-hash": "0.0.6",
     "webpack-merge": "4.1.1",
     "whatwg-fetch": "2.0.3",
     "which-country": "1.0.0"

webpack.prod.config.js

@@ -5,6 +5,7 @@
 var Merge = require('webpack-merge');
 var webpack = require('webpack');
 var BundleTracker = require('webpack-bundle-tracker');
+var WebpackMd5Hash = require("webpack-md5-hash");
 var _ = require('underscore');
 
 var commonConfig = require('./webpack.common.config.js');
@@ -29,7 +30,8 @@ var optimizedConfig = Merge.smart(commonConfig, {
             name: 'commons',
             filename: 'commons.[chunkhash].js',
             minChunks: 3
-        })
+        }),
+        new WebpackMd5Hash()
     ]
 }});