Add canonical URL to crate builds page

Author: jsha

src/web/builds.rs

@@ -27,6 +27,7 @@ struct BuildsPage {
     metadata: MetaData,
     builds: Vec<Build>,
     limits: Limits,
+    canonical_url: String,
 }
 
 impl_webpage! {
@@ -118,6 +119,7 @@ pub fn build_list_handler(req: &mut Request) -> IronResult<Response> {
             ),
             builds,
             limits,
+            canonical_url: format!("https://docs.rs/crate/{}/latest/builds", name),
         }
         .into_response(req)
     }

templates/crate/builds.html

@@ -5,6 +5,10 @@
     {{ macros::doc_title(name=metadata.name, version=metadata.version) }}
 {%- endblock title -%}
 
+{%- block meta -%}
+<link rel="canonical" href="{{ canonical_url | safe }}" />
+{%- endblock -%}
+
 {%- block topbar -%}
   {%- set latest_version = "" -%}
   {%- set latest_path = "" -%}