96 lines
2.9 KiB
Ruby
96 lines
2.9 KiB
Ruby
# frozen_string_literal: true
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# This model stores pull requests coming from external providers, such as
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# GitHub, when GitLab project is set as CI/CD only and remote mirror.
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#
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# When setting up a remote mirror with GitHub we subscribe to push and
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# pull_request webhook events. When a pull request is opened on GitHub,
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# a webhook is sent out, we create or update the status of the pull
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# request locally.
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#
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# When the mirror is updated and changes are pushed to branches we check
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# if there are open pull requests for the source and target branch.
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# If so, we create pipelines for external pull requests.
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class ExternalPullRequest < ApplicationRecord
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include Gitlab::Utils::StrongMemoize
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include ShaAttribute
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belongs_to :project
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sha_attribute :source_sha
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sha_attribute :target_sha
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validates :source_branch, presence: true
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validates :target_branch, presence: true
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validates :source_sha, presence: true
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validates :target_sha, presence: true
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validates :source_repository, presence: true
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validates :target_repository, presence: true
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validates :status, presence: true
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enum status: {
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open: 1,
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closed: 2
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}
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# We currently don't support pull requests from fork, so
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# we are going to return an error to the webhook
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validate :not_from_fork
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scope :by_source_branch, ->(branch) { where(source_branch: branch) }
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scope :by_source_repository, -> (repository) { where(source_repository: repository) }
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def self.create_or_update_from_params(params)
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find_params = params.slice(:project_id, :source_branch, :target_branch)
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safe_find_or_initialize_and_update(find: find_params, update: params) do |pull_request|
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yield(pull_request) if block_given?
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end
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end
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def actual_branch_head?
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actual_source_branch_sha == source_sha
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end
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def from_fork?
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source_repository != target_repository
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end
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def source_ref
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Gitlab::Git::BRANCH_REF_PREFIX + source_branch
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end
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def predefined_variables
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Gitlab::Ci::Variables::Collection.new.tap do |variables|
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variables.append(key: 'CI_EXTERNAL_PULL_REQUEST_IID', value: pull_request_iid.to_s)
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variables.append(key: 'CI_EXTERNAL_PULL_REQUEST_SOURCE_BRANCH_SHA', value: source_sha)
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variables.append(key: 'CI_EXTERNAL_PULL_REQUEST_TARGET_BRANCH_SHA', value: target_sha)
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variables.append(key: 'CI_EXTERNAL_PULL_REQUEST_SOURCE_BRANCH_NAME', value: source_branch)
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variables.append(key: 'CI_EXTERNAL_PULL_REQUEST_TARGET_BRANCH_NAME', value: target_branch)
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end
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end
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private
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def actual_source_branch_sha
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project.commit(source_ref)&.sha
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end
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def not_from_fork
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if from_fork?
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errors.add(:base, 'Pull requests from fork are not supported')
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end
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end
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def self.safe_find_or_initialize_and_update(find:, update:)
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safe_ensure_unique(retries: 1) do
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model = find_or_initialize_by(find)
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if model.update(update)
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yield(model) if block_given?
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end
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model
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end
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end
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end
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