Show file sizes of artifacts (#53)

Show artifacts sizes in webui

src/laminar.cpp

@@ -133,6 +133,7 @@ void Laminar::populateArtifacts(Json &j, std::string job, uint num) const {
             j.StartObject();
             j.set("url", archiveUrl + it->path().string().substr(prefixLen));
             j.set("filename", it->path().string().substr(scopeLen+1));
+            j.set("size", fs::file_size(it->path()));
             j.EndObject();
         }
     }

src/resources/index.html

@@ -222,7 +222,7 @@
       <div class="panel-heading">Artifacts</div>
       <div class="panel-body">
        <ul class="list-unstyled" style="margin-bottom: 0">
-        <li v-for="art in job.artifacts"><a :href="art.url" target="_self">{{art.filename}}</a></li>
+        <li v-for="art in job.artifacts"><a :href="art.url" target="_self">{{art.filename}}</a> [{{ art.size | iecFileSize }}]</li>
        </ul>
       </div>
      </div>

src/resources/js/app.js

@@ -2,6 +2,13 @@
  * frontend application for Laminar Continuous Integration
  * https://laminar.ohwg.net
  */
+
+Vue.filter('iecFileSize', function(bytes) {
+  var exp = Math.floor(Math.log(bytes) / Math.log(1024));
+  return (bytes / Math.pow(1024, exp)).toFixed(1) + ' ' +
+    ['B', 'KiB', 'MiB', 'GiB', 'TiB'][exp];
+});
+
 const wsp = function(path) {
   return new WebSocket((location.protocol === 'https:'?'wss://':'ws://')
                           + location.host + path);