Allow additional front matter for Post

lib/jekyll/commands/post.rb

@@ -64,8 +64,17 @@ def _time_stamp
         end
 
         def content(custom_front_matter = {})
+          default_front_matter = compose_config["post_default_front_matter"]
+          custom_front_matter.merge!(default_front_matter) if default_front_matter.is_a?(Hash)
+
           super({ "date" => _time_stamp }.merge(custom_front_matter))
         end
+
+        private
+
+        def compose_config
+          @compose_config ||= Jekyll.configuration["jekyll_compose"] || {}
+        end
       end
     end
   end

spec/post_spec.rb

@@ -113,15 +113,25 @@
       expect(path).to exist
     end
 
-    context "auto_open editor is set" do
+    context "configuration is set" do
       let(:posts_dir) { Pathname.new source_dir("_posts") }
       let(:config_data) do
         %(
       jekyll_compose:
         auto_open: true
+        post_default_front_matter:
+          description: my description
+          category:
       )
       end
 
+      it "creates post with the specified config" do
+        capture_stdout { described_class.process(args) }
+        post = File.read(path)
+        expect(post).to match(%r!description: my description!)
+        expect(post).to match(%r!category: !)
+      end
+
       context "env variable EDITOR is set up" do
         before { ENV["EDITOR"] = "vim" }