fetcher.rb in rubyfocus-0.5.5

- old
+ new

@@ -36,20 +36,20 @@
 	# Returns the contents of a given patch
 	def patch(filename)
 		raise RuntimeError, "Method Fetcher#patch called for abstract class Fetcher."
 	end
 
-	# Returns the latest patch
+	# Returns the ID of head - the latest patch committed to the database.
 	def head
-		@head ||= patches.sort.last
+		@head ||= (patches.empty? ? base_id : patches.sort.last.to_id)
 	end
 
 	# Can you reach head from the given ID?
 	def can_reach_head_from?(id)
 		patch_array = patches.select{ |p| p.from_ids.include?(id) }
 		until patch_array.empty?
 			p = patch_array.first
-			return true if p == self.head
+			return true if p.to_id == self.head
 
 			next_patches = patches.select{ |np| np.from_ids.include? p.to_id }
 			patch_array = patch_array[1..-1] + next_patches
 		end
 		return false
\ No newline at end of file