Import GitHub Pull Requests into GitLab

lib/gitlab/github_import/importer.rb

@@ -12,7 +12,16 @@ module Gitlab
       end
 
       def execute
-        #Issues && Comments
+        import_issues
+        import_pull_requests
+
+        true
+      end
+
+      private
+
+      def import_issues
+        # Issues && Comments
         client.list_issues(project.import_source, state: :all,
                                                   sort: :created,
                                                   direction: :asc).each do |issue|
@@ -33,18 +42,59 @@ module Gitlab
               description: body,
               title: issue.title,
               state: issue.state == 'closed' ? 'closed' : 'opened',
-              author_id: gl_user_id(project, issue.user.id)
+              author_id: gl_author_id(project, issue.user.id)
             )
           end
         end
       end
 
-      private
+      def import_pull_requests
+        client.pull_requests(project.import_source, state: :all,
+                                                    sort: :created,
+                                                    direction: :asc).each do |pull_request|
+          body = @formatter.author_line(pull_request.user.login)
+          body += pull_request.body || ""
 
-      def gl_user_id(project, github_id)
-        user = User.joins(:identities).
-          find_by("identities.extern_uid = ? AND identities.provider = 'github'", github_id.to_s)
-        (user && user.id) || project.creator_id
+          source_branch = pull_request.head.ref
+          target_branch = pull_request.base.ref
+
+          merge_request = MergeRequest.create!(
+            title: pull_request.title,
+            description: body,
+            source_project: project,
+            source_branch: source_branch,
+            target_project: project,
+            target_branch: target_branch,
+            state: merge_request_state(pull_request),
+            author_id: gl_author_id(project, pull_request.user.id),
+            assignee_id: gl_user_id(pull_request.assignee.try(:id)),
+            created_at: pull_request.created_at,
+            updated_at: pull_request.updated_at
+          )
+        end
+      end
+
+      def merge_request_state(pull_request)
+        case true
+        when pull_request.state == 'closed' && pull_request.merged_at.present?
+          'merged'
+        when pull_request.state == 'closed'
+          'closed'
+        else
+          'opened'
+        end
+      end
+
+      def gl_author_id(project, github_id)
+        gl_user_id(github_id) || project.creator_id
+      end
+
+      def gl_user_id(github_id)
+        if github_id
+          User.joins(:identities).
+            find_by("identities.extern_uid = ? AND identities.provider = 'github'", github_id.to_s).
+            try(:id)
+        end
       end
     end
   end