lib/hx.rb in hx-0.4.1 vs lib/hx.rb in hx-0.5.0

@@ -476,16 +476,55 @@
   def initialize(output_dir)
     @output_dir = Pathname.new(output_dir)
   end
 
   def build_file(path, entry)
+    build_file_helper(path, entry, false)
+  end
+
+  def build_file_if_updated(path, entry)
+    build_file_helper(path, entry, true)
+  end
+
+  def build_file_helper(path, entry, update_only)
     filename = @output_dir + path
+    return self if update_only and filename.exist? and \
+                   entry['updated'] and filename.mtime >= entry['updated']
     dirname = filename.parent
     dirname.mkpath()
     filename.open("wb") do |stream|
       stream.write entry['content'].to_s
     end
     self
+  end
+  private :build_file_helper
+end
+
+class LazyContent
+  def initialize(&block)
+    raise ArgumentError, "No block given" unless block
+    @content = nil
+    @block = block
+  end
+
+  def to_s
+    if @block
+      @content = @block.call
+      @block = nil
+    end
+    @content
+  end
+
+  def to_yaml(*args)
+    to_s.to_yaml(*args)
+  end
+
+  def to_json(*args)
+    to_s.to_json(*args)
+  end
+
+  def to_liquid(*args)
+    to_s.to_liquid(*args)
   end
 end
 
 end