Compile html comment

lib/hamlit/compiler.rb

@@ -20,6 +20,8 @@ module Hamlit
       case node.type
       when :root
         compile_children(node)
+      when :comment
+        compile_comment(node)
       when :doctype
         compile_doctype(node)
       when :tag
@@ -39,6 +41,13 @@ module Hamlit
       @doctype_compiler.compile(node)
     end
 
+    def compile_comment(node)
+      if node.children.empty?
+        return [:html, :comment, [:static, " #{node.value[:text]} "]]
+      end
+      [:html, :comment, compile_children(node)]
+    end
+
     def compile_tag(node)
       @tag_compiler.compile(node) { |n| compile_children(n) }
     end

lib/hamlit/whitespace_handler.rb

@@ -28,7 +28,7 @@ module Hamlit
     end
 
     def prepend_whitespace?(node)
-      return false if node.type != :tag
+      return false unless %i[comment tag].include?(node.type)
       !nuke_inner_whitespace?(node)
     end
 
@@ -54,7 +54,7 @@ module Hamlit
       case node.type
       when :doctype
         node.value[:type] != 'xml'
-      when :plain, :tag
+      when :plain, :tag, :comment
         true
       else
         false

test/haml-spec/tests.yml

@@ -335,20 +335,20 @@ silent comments:
         %div
             foo
     html: ''
-# markup comments:
-#   an inline markup comment:
-#     haml: "/ comment"
-#     html: "<!-- comment -->"
-#   a nested markup comment:
-#     haml: |-
-#       /
-#         comment
-#         comment2
-#     html: |-
-#       <!--
-#         comment
-#         comment2
-#       -->
+markup comments:
+  an inline markup comment:
+    haml: "/ comment"
+    html: "<!-- comment -->"
+  a nested markup comment:
+    haml: |-
+      /
+        comment
+        comment2
+    html: |-
+      <!--
+        comment
+        comment2
+      -->
 # conditional comments:
 #   a conditional comment:
 #     haml: |-