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# frozen_string_literal: true
module Gitlab
module GithubImport
module Importer
class PullRequestImporter
attr_reader :pull_request, :project, :client, :user_finder,
:milestone_finder, :issuable_finder
# pull_request - An instance of
# `Gitlab::GithubImport::Representation::PullRequest`.
# project - An instance of `Project`
# client - An instance of `Gitlab::GithubImport::Client`
def initialize(pull_request, project, client)
@pull_request = pull_request
@project = project
@client = client
@user_finder = UserFinder.new(project, client)
@milestone_finder = MilestoneFinder.new(project)
@issuable_finder =
GithubImport::IssuableFinder.new(project, pull_request)
end
def execute
if (mr_id = create_merge_request)
issuable_finder.cache_database_id(mr_id)
end
end
# Creates the merge request and returns its ID.
#
# This method will return `nil` if the merge request could not be
# created.
def create_merge_request
author_id, author_found = user_finder.author_id_for(pull_request)
description = MarkdownText
.format(pull_request.description, pull_request.author, author_found)
# 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
attributes = {
iid: pull_request.iid,
title: pull_request.truncated_title,
description: description,
source_project_id: project.id,
target_project_id: project.id,
source_branch: pull_request.formatted_source_branch,
target_branch: pull_request.target_branch,
state: pull_request.state,
milestone_id: milestone_finder.id_for(pull_request),
author_id: author_id,
assignee_id: user_finder.assignee_id_for(pull_request),
created_at: pull_request.created_at,
updated_at: pull_request.updated_at
}
# 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 = GithubImport
.insert_and_return_id(attributes, project.merge_requests)
merge_request = project.merge_requests.find(merge_request_id)
# These fields are set so we can create the correct merge request
# diffs.
merge_request.source_branch_sha = pull_request.source_branch_sha
merge_request.target_branch_sha = pull_request.target_branch_sha
merge_request.keep_around_commit
merge_request.merge_request_diffs.create
merge_request.id
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.
end
end
end
end
end
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