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Diffstat (limited to 'lib/gitlab/import/merge_request_helpers.rb')
| -rw-r--r-- | lib/gitlab/import/merge_request_helpers.rb | 70 |
1 files changed, 70 insertions, 0 deletions
diff --git a/lib/gitlab/import/merge_request_helpers.rb b/lib/gitlab/import/merge_request_helpers.rb new file mode 100644 index 00000000000..8ba70700dc1 --- /dev/null +++ b/lib/gitlab/import/merge_request_helpers.rb @@ -0,0 +1,70 @@ +# frozen_string_literal: true + +module Gitlab + module Import + module MergeRequestHelpers + include DatabaseHelpers + + def create_merge_request_without_hooks(project, attributes, iid) + # This work must be wrapped in a transaction as otherwise we can leave + # behind incomplete data in the event of an error. This can then lead + # to duplicate key errors when jobs are retried. + MergeRequest.transaction do + # When creating merge requests there are a lot of hooks that may + # run, for many different reasons. Many of these hooks (e.g. the + # ones used for rendering Markdown) are completely unnecessary and + # may even lead to transaction timeouts. + # + # To ensure importing pull requests has a minimal impact and can + # complete in a reasonable time we bypass all the hooks by inserting + # the row and then retrieving it. We then only perform the + # additional work that is strictly necessary. + merge_request_id = insert_and_return_id(attributes, project.merge_requests) + + merge_request = project.merge_requests.find(merge_request_id) + + # We use .insert_and_return_id which effectively disables all callbacks. + # Trigger iid logic here to make sure we track internal id values consistently. + merge_request.ensure_target_project_iid! + + [merge_request, false] + end + rescue ActiveRecord::InvalidForeignKey + # It's possible the project has been deleted since scheduling this + # job. In this case we'll just skip creating the merge request. + [] + rescue ActiveRecord::RecordNotUnique + # It's possible we previously created the MR, but failed when updating + # the Git data. In this case we'll just continue working on the + # existing row. + [project.merge_requests.find_by(iid: iid), true] + end + + def insert_or_replace_git_data(merge_request, source_branch_sha, target_branch_sha, already_exists = false) + # These fields are set so we can create the correct merge request + # diffs. + merge_request.source_branch_sha = source_branch_sha + merge_request.target_branch_sha = target_branch_sha + + merge_request.keep_around_commit + + # MR diffs normally use an "after_save" hook to pull data from Git. + # All of this happens in the transaction started by calling + # create/save/etc. This in turn can lead to these transactions being + # held open for much longer than necessary. To work around this we + # first save the diff, then populate it. + diff = + if already_exists + merge_request.merge_request_diffs.take || + merge_request.merge_request_diffs.build + else + merge_request.merge_request_diffs.build + end + + diff.importing = true + diff.save + diff.save_git_content + end + end + end +end |