lib/eternity/delta.rb in eternity-0.0.2 vs lib/eternity/delta.rb in eternity-0.0.3

@@ -22,9 +22,14 @@
             hash[collection][id] = TrackFlatter.flatten changes if change
           end
         end
       end
 
+      def between(commit_1, commit_2)
+        commits = ([commit_2] + commit_2.history) - ([commit_1] + commit_1.history)
+        merge commits.reverse.map(&:delta)
+      end
+
       def revert(delta, commit)
         commit.with_index do |index|
           delta.each_with_object({}) do |(collection, changes), hash|
             hash[collection] = {}
             changes.each do |id, change|
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