Add `type` attribute to Document instances (#7406)

Merge pull request 7406

lib/jekyll/document.rb

@@ -5,7 +5,7 @@ module Jekyll
     include Comparable
     extend Forwardable
 
-    attr_reader :path, :site, :extname, :collection
+    attr_reader :path, :site, :extname, :collection, :type
     attr_accessor :content, :output
 
     def_delegator :self, :read_post_data, :post_read
@@ -44,6 +44,8 @@ module Jekyll
       @path = path
       @extname = File.extname(path)
       @collection = relations[:collection]
+      @type = @collection.label.to_sym
+
       @has_yaml_header = nil
 
       if draft?
@@ -53,7 +55,7 @@ module Jekyll
       end
 
       data.default_proc = proc do |_, key|
-        site.frontmatter_defaults.find(relative_path, collection.label, key)
+        site.frontmatter_defaults.find(relative_path, type, key)
       end
 
       trigger_hooks(:post_init)
@@ -462,10 +464,7 @@ module Jekyll
     end
 
     def merge_defaults
-      defaults = @site.frontmatter_defaults.all(
-        relative_path,
-        collection.label.to_sym
-      )
+      defaults = @site.frontmatter_defaults.all(relative_path, type)
       merge_data!(defaults, :source => "front matter defaults") unless defaults.empty?
     end
 

lib/jekyll/excerpt.rb

@@ -10,7 +10,7 @@ module Jekyll
 
     def_delegators :@doc,
                    :site, :name, :ext, :extname,
-                   :collection, :related_posts,
+                   :collection, :related_posts, :type,
                    :coffeescript_file?, :yaml_file?,
                    :url, :next_doc, :previous_doc
 

test/test_document.rb

@@ -58,6 +58,10 @@ class TestDocument < JekyllUnitTest
       assert_equal "configuration", @document.basename_without_ext
     end
 
+    should "know its type" do
+      assert_equal :methods, @document.type
+    end
+
     should "know whether it's a YAML file" do
       assert_equal false, @document.yaml_file?
     end

test/test_excerpt.rb

@@ -56,6 +56,15 @@ class TestExcerpt < JekyllUnitTest
       end
     end
 
+    context "#type" do
+      should "return the post's type" do
+        assert_equal @excerpt.type, @post.type
+      end
+      should "return a symbol" do
+        assert_same @excerpt.type.class, Symbol
+      end
+    end
+
     context "#to_s" do
       should "return rendered output" do
         assert_equal @excerpt.output, @excerpt.to_s