Use already existing mechanism for assets_host

config.ru

@@ -64,4 +64,5 @@ run Travis::Web::App.build(
   pro: ENV['TRAVIS_PRO'],
   code_climate: ENV['CODE_CLIMATE'],
   code_climate_url: ENV['CODE_CLIMATE_URL'],
+  assets_host: ENV['ASSETS_HOST']
 )

lib/travis/web/app.rb

@@ -94,7 +94,6 @@ class Travis::Web::App
       else
         set_config(content, options) if config_needed?(file)
         set_title(content) if index?(file)
-        set_assets_host(content) if index?(file)
 
         headers = {
           'Content-Length'   => content.bytesize.to_s,
@@ -169,7 +168,14 @@ class Travis::Web::App
       end
 
       string.gsub! %r{(src|href)="(?:\/?)((styles|scripts)\/[^"]*)"} do
-        %(#{$1}=#{opts[:alt] ? "#{S3_URL}/#{opts[:alt]}/#{$2}":"/#{$2}"})
+        src = if options[:assets_host]
+          "#{options[:assets_host].chomp('/')}/#{$2}"
+        elsif opts[:alt]
+          "#{S3_URL}/#{opts[:alt]}/#{$2}"
+        else
+          "/#{$2}"
+        end
+        %(#{$1}="#{src}")
       end
     end
 end

public/index.html

@@ -23,8 +23,8 @@
     <link rel="dns-prefetch" href="//api.github.com">
     <link rel="dns-prefetch" href="//www.gravatar.com">
     <link rel="icon" type="image/png" href="/favicon.ico">
-    <link rel="stylesheet" href="{{assets_host}}/styles/app.css">
-    <script src="{{assets_host}}/scripts/app.js"></script>
+    <link rel="stylesheet" href="/styles/app.css">
+    <script src="/scripts/app.js"></script>
     <script>
       minispade.require('travis')
       Travis.run()