shorter filesize format function

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> [{{ art.size | prettyBytes }}]</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

@@ -3,35 +3,12 @@
  * https://laminar.ohwg.net
  */
 
-// usage: {{ file.size | prettyBytes }}
-// source: https://gist.github.com/james2doyle/4aba55c22f084800c199
-Vue.filter('prettyBytes', function (num) {
-  // jacked from: https://github.com/sindresorhus/pretty-bytes
-  if (typeof num !== 'number' || isNaN(num)) {
-    throw new TypeError('Expected a number');
-  }
-
-  var exponent;
-  var unit;
-  var neg = num < 0;
-  var units = ['B', 'kB', 'MB', 'GB', 'TB', 'PB', 'EB', 'ZB', 'YB'];
-
-  if (neg) {
-    num = -num;
-  }
-
-  if (num < 1) {
-    return (neg ? '-' : '') + num + ' B';
-  }
-
-  exponent = Math.min(Math.floor(Math.log(num) / Math.log(1000)), units.length - 1);
-  num = (num / Math.pow(1000, exponent)).toFixed(2) * 1;
-  unit = units[exponent];
-
-  return (neg ? '-' : '') + num + ' ' + unit;
+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);