Add description meta tag for packages.

Author: wlonk

app/routes/crate.js

@@ -7,5 +7,22 @@ export default Ember.Route.extend({
                 return this.controllerFor('application').set('flashError', `Crate '${params.crate_id}' does not exist`);
             }
         });
+    },
+
+    afterModel(model) {
+        this.setHeadTags(model);
+    },
+
+    setHeadTags(model) {
+        var headTags = [{
+            type: 'meta',
+            tagId: 'meta-description-tag',
+            attrs: {
+                name: 'description',
+                content: model.get('description') || 'A package for Rust.'
+            }
+        }];
+
+        this.set('headTags', headTags);
     }
 });

app/routes/index.js

@@ -2,6 +2,17 @@ import Ember from 'ember';
 import ajax from 'ic-ajax';
 
 export default Ember.Route.extend({
+    headTags: [
+        {
+            type: 'meta',
+            tagId: 'meta-description-tag',
+            attrs: {
+              name: 'description',
+              content: 'Cargo.io: The Rust community’s crate host. Instantly publish your crates and install them. Use the API to interact and find out more information about available crates. Become a contributor and enhance the site with your work.'
+            }
+        }
+    ],
+
     model() {
         function addCrates(store, crates) {
             for (var i = 0; i < crates.length; i++) {

app/templates/head.hbs

@@ -0,0 +1,2 @@
+<title>{{model.title}}</title>
+{{head-tags headTags=model.headTags}}

package.json

@@ -32,6 +32,7 @@
     "ember-cli-ic-ajax": "1.0.0",
     "ember-cli-inject-live-reload": "^1.4.0",
     "ember-cli-jshint": "^1.0.0",
+    "ember-cli-meta-tags": "2.0.2",
     "ember-cli-mirage": "0.1.13",
     "ember-cli-moment-shim": "2.0.0",
     "ember-cli-qunit": "3.0.0",