Returns a link tag that browsers and news readers can use to auto-detect a RSS or ATOM feed for this page. The type can either be :rss (default) or :atom and the options follow the url_for style of declaring a link target.

Examples:

  auto_discovery_link_tag # =>
    <link rel="alternate" type="application/rss+xml" title="RSS" href="http://www.curenthost.com/controller/action" />
  auto_discovery_link_tag(:atom) # =>
    <link rel="alternate" type="application/atom+xml" title="ATOM" href="http://www.curenthost.com/controller/action" />
  auto_discovery_link_tag(:rss, :action => "feed") # =>
    <link rel="alternate" type="application/atom+xml" title="ATOM" href="http://www.curenthost.com/controller/feed" />

[Source]

    # File vendor/actionpack/lib/action_view/helpers/asset_tag_helper.rb, line 19
19:       def auto_discovery_link_tag(type = :rss, options = {})
20:         tag(
21:           "link", "rel" => "alternate", "type" => "application/#{type}+xml", "title" => type.to_s.upcase,
22:           "href" => url_for(options.merge(:only_path => false))
23:         )
24:       end

Returns a script include tag per source given as argument. Examples:

  javascript_include_tag "xmlhr" # =>
    <script language="JavaScript" type="text/javascript" src="/javascripts/xmlhr.js"></script>

  javascript_include_tag "common.javascript", "/elsewhere/cools" # =>
    <script language="JavaScript" type="text/javascript" src="/javascripts/common.javascript"></script>
    <script language="JavaScript" type="text/javascript" src="/elsewhere/cools.js"></script>

[Source]

    # File vendor/actionpack/lib/action_view/helpers/asset_tag_helper.rb, line 34
34:       def javascript_include_tag(*sources)
35:         sources.collect { |source|
36:           source = "/javascripts/#{source}" unless source.include?("/")
37:           source = "#{source}.js" unless source.include?(".")
38:           content_tag("script", "", "language" => "JavaScript", "type" => "text/javascript", "src" => source)
39:         }.join("\n")
40:       end

Returns a css link tag per source given as argument. Examples:

  stylesheet_link_tag "style" # =>
    <link href="/stylesheets/style.css" media="screen" rel="Stylesheet" type="text/css" />

  stylesheet_link_tag "random.styles", "/css/stylish" # =>
    <link href="/stylesheets/random.styles" media="screen" rel="Stylesheet" type="text/css" />
    <link href="/css/stylish.css" media="screen" rel="Stylesheet" type="text/css" />

[Source]

    # File vendor/actionpack/lib/action_view/helpers/asset_tag_helper.rb, line 50
50:       def stylesheet_link_tag(*sources)
51:         sources.collect { |source|
52:           source = "/stylesheets/#{source}" unless source.include?("/")
53:           source = "#{source}.css" unless source.include?(".")
54:           tag("link", "rel" => "Stylesheet", "type" => "text/css", "media" => "screen", "href" => source)
55:         }.join("\n")
56:       end