config_service: Changed file links to point to latest revision instead of master

appengine/config_service/ui/src/config-ui/config-set.html

 <!--
   Copyright 2017 The LUCI Authors. All rights reserved.
   Use of this source code is governed under the Apache License, Version 2.0
   that can be found in the LICENSE file.
 -->
 
 <link rel="import" href="config-file-card.html">
 <link rel="import" href="../../bower_components/iron-ajax/iron-ajax.html">
 <link rel="import" href="../../bower_components/iron-icons/iron-icons.html">
 <link rel="import" href="../../bower_components/paper-item/paper-item.html">
@@ skipping 134 matching lines @@
         <template is="dom-if" if="[[_not(isLoading)]]">
           <template is="dom-if" if="[[_isEmpty(files)]]">
             <div class="center" style="font-family: sans-serif;">
               No config files found.
             </div>
           </template>
           <template is="dom-if" if="[[_not(_isEmpty(files))]]">
             <template is="dom-repeat" items="[[files]]" as="file">
               <div class="center config-card">  
                 <config-file-card
-                    name="[[file.path]]" link="[[location]]/[[file.path]]">
+                    name="[[file.path]]" link="[[url]]/[[file.path]]">
                 </config-file-card>
               </div>
             </template>
           </template>
         </template>
       </template>
     </template>
     <template is="dom-if" if="[[errorMessage]]">
       <div class="center">
         <p>[[errorMessage]]</p>
@@ skipping 25 matching lines @@
 
         isRefreshing: {
           type: Boolean,
           value: false
         },
 
         lastImportAttempt: {
           type: Object
         },
 
-        location: {
+        url: {
           type: String
         },
 
         name: {
           type: String
         },
 
         refreshMessage: {
           type: String,
           value: null
@@ skipping 37 matching lines @@
         this.isRefreshing = false;
         this.refreshMessage = "Refresh successful.";
         this.fire('refreshComplete');
       },
 
       _not: function(b) {
         return !b;
       },
 
       _onGotConfigFiles: function(event) {
-        this.files = event.detail.response.config_sets[0].files || [];
-        this.location = event.detail.response.config_sets[0].location;
-        this.lastImportAttempt = 
-            event.detail.response.config_sets[0].last_import_attempt || null;
+        var config_set = event.detail.response.config_sets[0];
+        this.files = config_set.files || [];
+        this.lastImportAttempt = config_set.last_import_attempt || null;
+        if (config_set.revision && config_set.revision.url) {
+          this.url = config_set.revision.url;
+        } else {
+          this.url = config_set.location;
+        }
         this.isLoading = false;
         this.errorMessage = null;
         this.fire('processedConfigFiles');
       },
 
       _onRefreshError: function() {
         this.isRefreshing = false;
         this.refreshMessage = "Error: Files could not be refreshed.";
         this.fire('refreshError');
       },
@@ skipping 13 matching lines @@
           this.errorMessage = "Internal server error.";
         } else {
           this.errorMessage = "Error occured. Try again later.";
         }
         this.fire('fetchError');
       }
 
     });
   </script>
 </dom-module>