milo: buildbucket builer view

appengine/cmd/milo/settings/funcs.go

 // Copyright 2016 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.
 
 package settings
 
 import (
         "bytes"
         "fmt"
         "html/template"
@@ skipping 95 matching lines @@
         return time.Time{}
 }
 
 var linkifyTemplate = template.Must(
         template.New("linkify").Parse(`<a href="{{.URL}}">
                 {{if .Img}}<img src="{{.Img}}"{{if .Alt}} alt="{{.Alt}}"{{end}}>
                 {{else}}{{.Label}}{{end}}</a>`))
 
 // linkify turns a resp.Link struct into a canonical link.
 func linkify(link *resp.Link) template.HTML {
+        if link == nil {
+                return ""
+        }
         buf := bytes.Buffer{}
-        linkifyTemplate.Execute(&buf, link)
+        if err := linkifyTemplate.Execute(&buf, link); err != nil {
+                panic(err)
+        }
         return template.HTML(buf.Bytes())
 }
 
 // sub subtracts one number from another, because apparently go templates aren't
 // smart enough to do that.
 func sub(a, b int) int {
         return a - b
 }
 
 // shortHash abbriviates a git hash into 6 characters.
 func shortHash(s string) string {
         if len(s) > 6 {
                 return s[0:6]
         }
         return s
 }