127 lines
4.2 KiB
Ruby
127 lines
4.2 KiB
Ruby
# frozen_string_literal: true
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require 'gitlab/email/handler/base_handler'
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require 'gitlab/email/handler/reply_processing'
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# handles merge request creation emails with these formats:
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# incoming+gitlab-org-gitlab-ce-20-Author_Token12345678-merge-request@incoming.gitlab.com
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# incoming+gitlab-org/gitlab-ce+merge-request+Author_Token12345678@incoming.gitlab.com (legacy)
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module Gitlab
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module Email
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module Handler
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class CreateMergeRequestHandler < BaseHandler
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include ReplyProcessing
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HANDLER_REGEX = /\A#{HANDLER_ACTION_BASE_REGEX}-(?<incoming_email_token>.+)-merge-request\z/.freeze
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HANDLER_REGEX_LEGACY = /\A(?<project_path>[^\+]*)\+merge-request\+(?<incoming_email_token>.*)/.freeze
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def initialize(mail, mail_key)
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super(mail, mail_key)
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if !mail_key&.include?('/') && (matched = HANDLER_REGEX.match(mail_key.to_s))
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@project_slug = matched[:project_slug]
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@project_id = matched[:project_id]&.to_i
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@incoming_email_token = matched[:incoming_email_token]
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elsif matched = HANDLER_REGEX_LEGACY.match(mail_key.to_s)
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@project_path = matched[:project_path]
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@incoming_email_token = matched[:incoming_email_token]
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end
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end
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def can_handle?
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incoming_email_token && (project_id || project_path)
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end
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def execute
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raise ProjectNotFound unless project
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validate_permission!(:create_merge_request_in)
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validate_permission!(:create_merge_request_from)
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verify_record!(
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record: create_merge_request,
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invalid_exception: InvalidMergeRequestError,
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record_name: 'merge_request')
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end
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# rubocop: disable CodeReuse/ActiveRecord
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def author
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@author ||= User.find_by(incoming_email_token: incoming_email_token)
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end
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# rubocop: enable CodeReuse/ActiveRecord
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def metrics_params
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super.merge(includes_patches: patch_attachments.any?)
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end
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def metrics_event
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:receive_email_create_merge_request
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end
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private
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def build_merge_request
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MergeRequests::BuildService.new(project, author, merge_request_params).execute
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end
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def create_merge_request
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merge_request = build_merge_request
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if patch_attachments.any?
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apply_patches_to_source_branch(start_branch: merge_request.target_branch)
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remove_patch_attachments
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# Rebuild the merge request as the source branch might just have
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# been created, so we should re-validate.
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merge_request = build_merge_request
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end
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if merge_request.errors.any?
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merge_request
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else
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MergeRequests::CreateService.new(project, author).create(merge_request)
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end
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end
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def merge_request_params
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params = {
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source_project_id: project.id,
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source_branch: source_branch,
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target_project_id: project.id
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}
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params[:description] = message if message.present?
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params
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end
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def apply_patches_to_source_branch(start_branch:)
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patches = patch_attachments.map { |patch| patch.body.decoded }
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result = Commits::CommitPatchService
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.new(project, author, branch_name: source_branch, patches: patches, start_branch: start_branch)
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.execute
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if result[:status] != :success
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message = "Could not apply patches to #{source_branch}:\n#{result[:message]}"
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raise InvalidAttachment, message
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end
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end
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def remove_patch_attachments
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patch_attachments.each { |patch| mail.parts.delete(patch) }
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# reset the message, so it needs to be reprocessed when the attachments
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# have been modified
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@message = nil
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end
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def patch_attachments
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@patches ||= mail.attachments
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.select { |attachment| attachment.filename.ends_with?('.patch') }
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.sort_by(&:filename)
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end
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def source_branch
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@source_branch ||= mail.subject
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end
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end
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end
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end
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end
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