2 files changed, 45 insertions, 2 deletions

diff --git a/docs/config/processors/error-docs.js b/docs/config/processors/error-docs.js
new file mode 100644
index 00000000..80a7b996
--- /dev/null
+++ b/docs/config/processors/error-docs.js
@@ -0,0 +1,42 @@
+var _ = require('lodash');
+var log = require('winston');
+var path = require('canonical-path');
+
+module.exports = {
+  name: 'error-docs',
+  description: 'Compute the various fields for docs in the Error area',
+  runAfter: ['tags-extracted'],
+  init: function(config, injectables) {
+    injectables.value('errorNamespaces', {});
+  },
+  process: function(docs, partialNames, errorNamespaces) {
+
+    // Create error namespace docs and attach error docs to each
+    _.forEach(docs, function(doc) {
+      if ( doc.docType === 'error' ) {
+
+        var namespaceDoc = errorNamespaces[doc.namespace];
+        if ( !namespaceDoc ) {
+          // First time we came across this namespace, so create a new one
+          namespaceDoc = errorNamespaces[doc.namespace] = {
+            area: doc.area,
+            name: doc.namespace,
+            errors: [],
+            path: path.dirname(doc.path),
+            outputPath: path.dirname(doc.outputPath) + '.html',
+            docType: 'errorNamespace'
+          };
+        }
+
+        // Add this error to the namespace
+        namespaceDoc.errors.push(doc);
+        doc.namespace = namespaceDoc;
+
+      }
+
+    });
+
+
+    return docs.concat(_.values(errorNamespaces));
+  }
+};
\ No newline at end of file
diff --git a/docs/config/processors/pages-data.js b/docs/config/processors/pages-data.js
index 35ed242f..ff419423 100644
--- a/docs/config/processors/pages-data.js
+++ b/docs/config/processors/pages-data.js
@@ -103,7 +103,7 @@ var navGroupMappers = {
       return {
         name: page.name,
         href: page.path,
-        type: 'error'
+        type: page.docType === 'errorNamespace' ? 'section' : 'error'
       };
     })];
   },
@@ -142,7 +142,8 @@ module.exports = {
 
     // We are only interested in docs that are in a area and not landing pages
     var navPages = _.filter(docs, function(page) {
-      return page.area && page.docType != 'componentGroup';
+      return page.area &&
+        page.docType != 'componentGroup';
     });
 
     // Generate an object collection of pages that is grouped by area e.g.