Revert "Merge branch 'revert-satellites' into 'master' "

This reverts commit 5daf44b7c86e0e2641a902b1da8b01d91fa3dbfa, reversing
changes made to 2f706fbd231cabe7a76a5d17ac44285aaaf8592c.

1 files changed, 48 insertions, 13 deletions

diff --git a/app/services/merge_requests/merge_service.rb b/app/services/merge_requests/merge_service.rb
index 327ead4ff3f..2107529a21a 100644
--- a/app/services/merge_requests/merge_service.rb
+++ b/app/services/merge_requests/merge_service.rb
@@ -1,22 +1,57 @@
 module MergeRequests
   # MergeService class
   #
-  # Mark existing merge request as merged
-  # and execute all hooks and notifications
-  # Called when you do merge via command line and push code
-  # to target branch
-  class MergeService < BaseMergeService
+  # Do git merge and in case of success
+  # mark merge request as merged and execute all hooks and notifications
+  # Executed when you do merge via GitLab UI
+  #
+  class MergeService < MergeRequests::BaseService
+    attr_reader :merge_request, :commit_message
+
     def execute(merge_request, commit_message)
-      merge_request.merge
+      @commit_message = commit_message
+      @merge_request = merge_request
 
-      create_merge_event(merge_request, current_user)
-      create_note(merge_request)
-      notification_service.merge_mr(merge_request, current_user)
-      execute_hooks(merge_request, 'merge')
+      unless @merge_request.mergeable?
+        return error('Merge request is not mergeable')
+      end
+
+      merge_request.in_locked_state do
+        if merge_changes
+          after_merge
+          success
+        else
+          error('Can not merge changes')
+        end
+      end
+    end
+
+    private
+
+    def merge_changes
+      if sha = commit
+        after_commit(sha, merge_request.target_branch)
+      end
+    end
+
+    def commit
+      committer = repository.user_to_comitter(current_user)
+
+      options = {
+        message: commit_message,
+        author: committer,
+        committer: committer
+      }
+
+      repository.merge(merge_request.source_sha, merge_request.target_branch, options)
+    end
+
+    def after_commit(sha, branch)
+      PostCommitService.new(project, current_user).execute(sha, branch)
+    end
 
-      true
-    rescue
-      false
+    def after_merge
+      MergeRequests::PostMergeService.new(project, current_user).execute(merge_request)
     end
   end
 end