162 lines
5.5 KiB
Ruby
162 lines
5.5 KiB
Ruby
# frozen_string_literal: true
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require_relative 'teammate'
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require_relative 'request_helper'
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module Gitlab
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module Danger
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module Roulette
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ROULETTE_DATA_URL = 'https://gitlab-org.gitlab.io/gitlab-roulette/roulette.json'
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HOURS_WHEN_PERSON_CAN_BE_PICKED = (6..14).freeze
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INCLUDE_TIMEZONE_FOR_CATEGORY = {
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database: false
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}.freeze
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Spin = Struct.new(:category, :reviewer, :maintainer, :optional_role, :timezone_experiment)
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def team_mr_author
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team.find { |person| person.username == mr_author_username }
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end
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# Assigns GitLab team members to be reviewer and maintainer
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# for each change category that a Merge Request contains.
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#
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# @return [Array<Spin>]
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def spin(project, categories, timezone_experiment: false)
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spins = categories.map do |category|
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including_timezone = INCLUDE_TIMEZONE_FOR_CATEGORY.fetch(category, timezone_experiment)
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spin_for_category(project, category, timezone_experiment: including_timezone)
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end
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backend_spin = spins.find { |spin| spin.category == :backend }
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spins.each do |spin|
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including_timezone = INCLUDE_TIMEZONE_FOR_CATEGORY.fetch(spin.category, timezone_experiment)
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case spin.category
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when :qa
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# MR includes QA changes, but also other changes, and author isn't an SET
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if categories.size > 1 && !team_mr_author&.reviewer?(project, spin.category, [])
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spin.optional_role = :maintainer
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end
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when :test
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spin.optional_role = :maintainer
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if spin.reviewer.nil?
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# Fetch an already picked backend reviewer, or pick one otherwise
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spin.reviewer = backend_spin&.reviewer || spin_for_category(project, :backend, timezone_experiment: including_timezone).reviewer
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end
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when :engineering_productivity
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if spin.maintainer.nil?
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# Fetch an already picked backend maintainer, or pick one otherwise
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spin.maintainer = backend_spin&.maintainer || spin_for_category(project, :backend, timezone_experiment: including_timezone).maintainer
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end
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end
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end
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spins
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end
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# Looks up the current list of GitLab team members and parses it into a
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# useful form
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#
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# @return [Array<Teammate>]
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def team
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@team ||=
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begin
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data = Gitlab::Danger::RequestHelper.http_get_json(ROULETTE_DATA_URL)
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data.map { |hash| ::Gitlab::Danger::Teammate.new(hash) }
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rescue JSON::ParserError
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raise "Failed to parse JSON response from #{ROULETTE_DATA_URL}"
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end
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end
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# Like +team+, but only returns teammates in the current project, based on
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# project_name.
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#
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# @return [Array<Teammate>]
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def project_team(project_name)
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team.select { |member| member.in_project?(project_name) }
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rescue => err
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warn("Reviewer roulette failed to load team data: #{err.message}")
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[]
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end
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# Known issue: If someone is rejected due to OOO, and then becomes not OOO, the
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# selection will change on next spin
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# @param [Array<Teammate>] people
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def spin_for_person(people, random:, timezone_experiment: false)
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shuffled_people = people.shuffle(random: random)
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if timezone_experiment
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shuffled_people.find(&method(:valid_person_with_timezone?))
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else
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shuffled_people.find(&method(:valid_person?))
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end
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end
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private
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# @param [Teammate] person
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# @return [Boolean]
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def valid_person?(person)
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!mr_author?(person) && person.available
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end
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# @param [Teammate] person
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# @return [Boolean]
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def valid_person_with_timezone?(person)
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valid_person?(person) && HOURS_WHEN_PERSON_CAN_BE_PICKED.cover?(person.local_hour)
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end
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# @param [Teammate] person
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# @return [Boolean]
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def mr_author?(person)
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person.username == mr_author_username
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end
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def mr_author_username
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helper.gitlab_helper&.mr_author || `whoami`
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end
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def mr_source_branch
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return `git rev-parse --abbrev-ref HEAD` unless helper.gitlab_helper&.mr_json
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helper.gitlab_helper.mr_json['source_branch']
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end
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def mr_labels
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helper.gitlab_helper&.mr_labels || []
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end
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def new_random(seed)
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Random.new(Digest::MD5.hexdigest(seed).to_i(16))
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end
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def spin_role_for_category(team, role, project, category)
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team.select do |member|
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member.public_send("#{role}?", project, category, mr_labels) # rubocop:disable GitlabSecurity/PublicSend
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end
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end
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def spin_for_category(project, category, timezone_experiment: false)
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team = project_team(project)
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reviewers, traintainers, maintainers =
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%i[reviewer traintainer maintainer].map do |role|
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spin_role_for_category(team, role, project, category)
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end
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# TODO: take CODEOWNERS into account?
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# https://gitlab.com/gitlab-org/gitlab/issues/26723
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# Make traintainers have triple the chance to be picked as a reviewer
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random = new_random(mr_source_branch)
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reviewer = spin_for_person(reviewers + traintainers + traintainers, random: random, timezone_experiment: timezone_experiment)
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maintainer = spin_for_person(maintainers, random: random, timezone_experiment: timezone_experiment)
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Spin.new(category, reviewer, maintainer, false, timezone_experiment)
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end
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end
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end
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end
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