Use same code for diff and patch inside MergeAction

Signed-off-by: Dmitriy Zaporozhets <dmitriy.zaporozhets@gmail.com>

lib/gitlab/satellite/merge_action.rb

@@ -49,14 +49,7 @@ module Gitlab
         in_locked_and_timed_satellite do |merge_repo|
           prepare_satellite!(merge_repo)
           update_satellite_source_and_target!(merge_repo)
-
-          if merge_request.for_fork?
-            diff = merge_repo.git.native(:diff, default_options, "origin/#{merge_request.target_branch}", "source/#{merge_request.source_branch}")
-          else
-            diff = merge_repo.git.native(:diff, default_options, "#{merge_request.target_branch}", "#{merge_request.source_branch}")
-          end
-
-          return diff
+          diff = merge_repo.git.native(:diff, default_options, "origin/#{merge_request.target_branch}", "source/#{merge_request.source_branch}")
         end
       rescue Grit::Git::CommandFailed => ex
         handle_exception(ex)
@@ -88,14 +81,7 @@ module Gitlab
         in_locked_and_timed_satellite do |merge_repo|
           prepare_satellite!(merge_repo)
           update_satellite_source_and_target!(merge_repo)
-
-          if (merge_request.for_fork?)
-            patch = merge_repo.git.format_patch(default_options({stdout: true}), "origin/#{merge_request.target_branch}..source/#{merge_request.source_branch}")
-          else
-            patch = merge_repo.git.format_patch(default_options({stdout: true}), "#{merge_request.target_branch}..#{merge_request.source_branch}")
-          end
-
-          return patch
+          patch = merge_repo.git.format_patch(default_options({stdout: true}), "origin/#{merge_request.target_branch}..source/#{merge_request.source_branch}")
         end
       rescue Grit::Git::CommandFailed => ex
         handle_exception(ex)

spec/lib/gitlab/satellite/merge_action_spec.rb

@@ -2,13 +2,12 @@ require 'spec_helper'
 
 describe 'Gitlab::Satellite::MergeAction' do
   before(:each) do
-#    TestEnv.init(mailer: false, init_repos: true, repos: true)
     @master = ['master', 'b1e6a9dbf1c85e6616497a5e7bad9143a4bd0828']
     @one_after_stable = ['stable', '6ea87c47f0f8a24ae031c3fff17bc913889ecd00'] #this commit sha is one after stable
     @wiki_branch = ['wiki', '635d3e09b72232b6e92a38de6cc184147e5bcb41'] #this is the commit sha where the wiki branch goes off from master
     @conflicting_metior = ['metior', '313d96e42b313a0af5ab50fa233bf43e27118b3f'] #this branch conflicts with the wiki branch
 
-    #these commits are quite close together, itended to make string diffs/format patches small
+    # these commits are quite close together, itended to make string diffs/format patches small
     @close_commit1 = ['2_3_notes_fix', '8470d70da67355c9c009e4401746b1d5410af2e3']
     @close_commit2 = ['scss_refactoring', 'f0f14c8eaba69ebddd766498a9d0b0e79becd633']
   end
@@ -16,6 +15,7 @@ describe 'Gitlab::Satellite::MergeAction' do
   let(:project) { create(:project_with_code) }
   let(:merge_request) { create(:merge_request, source_project: project, target_project: project) }
   let(:merge_request_fork) { create(:merge_request) }
+
   describe '#commits_between' do
     def verify_commits(commits, first_commit_sha, last_commit_sha)
       commits.each { |commit| commit.class.should == Gitlab::Git::Commit }
@@ -145,4 +145,4 @@ describe 'Gitlab::Satellite::MergeAction' do
       end
     end
   end
-end
\ No newline at end of file
+end