Renamed Gitlab::Merge to Gitlab::Satellite::MergeAction

lib/gitlab/satellite/merge_action.rb

@@ -0,0 +1,83 @@
+module Gitlab
+  module Satellite
+    class MergeAction < Action
+      attr_accessor :merge_request, :user
+
+      def initialize(merge_request, user)
+        super merge_request.project
+        @merge_request = merge_request
+        @user = user
+      end
+
+      def can_be_merged?
+        in_locked_and_timed_satellite do |merge_repo|
+          merge_in_satellite!(merge_repo)
+        end
+      end
+
+      # Merges the source branch into the target branch in the satellite and
+      # pushes it back to Gitolite.
+      # It also removes the source branch if requested in the merge request.
+      #
+      # Returns false if the merge produced conflicts
+      # Returns false if pushing from the satellite to Gitolite failed or was rejected
+      # Returns true otherwise
+      def merge!
+        in_locked_and_timed_satellite do |merge_repo|
+          if merge_in_satellite!(merge_repo)
+            # push merge back to Gitolite
+            # will raise CommandFailed when push fails
+            merge_repo.git.push({raise: true}, :origin, merge_request.target_branch)
+
+            # remove source branch
+            if merge_request.should_remove_source_branch && !project.root_ref?(merge_request.source_branch)
+              # will raise CommandFailed when push fails
+              merge_repo.git.push({raise: true}, :origin, ":#{merge_request.source_branch}")
+            end
+
+            # merge, push and branch removal successful
+            true
+          end
+        end
+      rescue Grit::Git::CommandFailed => ex
+        Gitlab::GitLogger.error(ex.message)
+        false
+      end
+
+      private
+
+      # Merges the source_branch into the target_branch in the satellite.
+      #
+      # Note: it will clear out the satellite before doing anything
+      #
+      # Returns false if the merge produced conflicts
+      # Returns true otherwise
+      def merge_in_satellite!(repo)
+        prepare_satellite!(repo)
+
+        # create target branch in satellite at the corresponding commit from Gitolite
+        repo.git.checkout({b: true}, merge_request.target_branch, "origin/#{merge_request.target_branch}")
+
+        # merge the source branch from Gitolite into the satellite
+        # will raise CommandFailed when merge fails
+        repo.git.pull({no_ff: true, raise: true}, :origin, merge_request.source_branch)
+      rescue Grit::Git::CommandFailed => ex
+        Gitlab::GitLogger.error(ex.message)
+        false
+      end
+
+      # * Clears the satellite
+      # * Updates the satellite from Gitolite
+      # * Sets up Git variables for the user
+      def prepare_satellite!(repo)
+        project.satellite.clear
+
+        repo.git.reset(hard: true)
+        repo.git.fetch({}, :origin)
+
+        repo.git.config({}, "user.name", user.name)
+        repo.git.config({}, "user.email", user.email)
+      end
+    end
+  end
+end