debian-mirror-gitlab/app/models/merge_request.rb
2020-03-09 13:42:32 +05:30

1557 lines
47 KiB
Ruby

# frozen_string_literal: true
class MergeRequest < ApplicationRecord
include AtomicInternalId
include IidRoutes
include Issuable
include Noteable
include Referable
include Presentable
include TimeTrackable
include ManualInverseAssociation
include EachBatch
include ThrottledTouch
include Gitlab::Utils::StrongMemoize
include LabelEventable
include ReactiveCaching
include FromUnion
include DeprecatedAssignee
include ShaAttribute
include IgnorableColumns
sha_attribute :squash_commit_sha
self.reactive_cache_key = ->(model) { [model.project.id, model.iid] }
self.reactive_cache_refresh_interval = 10.minutes
self.reactive_cache_lifetime = 10.minutes
self.reactive_cache_hard_limit = 20.megabytes
SORTING_PREFERENCE_FIELD = :merge_requests_sort
belongs_to :target_project, class_name: "Project"
belongs_to :source_project, class_name: "Project"
belongs_to :merge_user, class_name: "User"
has_internal_id :iid, scope: :target_project, track_if: -> { !importing? }, init: ->(s) { s&.target_project&.merge_requests&.maximum(:iid) }
has_many :merge_request_diffs
has_many :merge_request_context_commits
has_many :merge_request_context_commit_diff_files, through: :merge_request_context_commits, source: :diff_files
has_one :merge_request_diff,
-> { order('merge_request_diffs.id DESC') }, inverse_of: :merge_request
belongs_to :latest_merge_request_diff, class_name: 'MergeRequestDiff'
manual_inverse_association :latest_merge_request_diff, :merge_request
# This is the same as latest_merge_request_diff unless:
# 1. There are arguments - in which case we might be trying to force-reload.
# 2. This association is already loaded.
# 3. The latest diff does not exist.
#
# The second one in particular is important - MergeRequestDiff#merge_request
# is the inverse of MergeRequest#merge_request_diff, which means it may not be
# the latest diff, because we could have loaded any diff from this particular
# MR. If we haven't already loaded a diff, then it's fine to load the latest.
def merge_request_diff
fallback = latest_merge_request_diff unless association(:merge_request_diff).loaded?
fallback || super
end
belongs_to :head_pipeline, foreign_key: "head_pipeline_id", class_name: "Ci::Pipeline"
has_many :events, as: :target, dependent: :delete_all # rubocop:disable Cop/ActiveRecordDependent
has_many :merge_requests_closing_issues,
class_name: 'MergeRequestsClosingIssues',
dependent: :delete_all # rubocop:disable Cop/ActiveRecordDependent
has_many :cached_closes_issues, through: :merge_requests_closing_issues, source: :issue
has_many :pipelines_for_merge_request, foreign_key: 'merge_request_id', class_name: 'Ci::Pipeline'
has_many :suggestions, through: :notes
has_many :unresolved_notes, -> { unresolved }, as: :noteable, class_name: 'Note'
has_many :merge_request_assignees
has_many :assignees, class_name: "User", through: :merge_request_assignees
has_many :user_mentions, class_name: "MergeRequestUserMention", dependent: :delete_all # rubocop:disable Cop/ActiveRecordDependent
has_many :deployment_merge_requests
# These are deployments created after the merge request has been merged, and
# the merge request was tracked explicitly (instead of implicitly using a CI
# build).
has_many :deployments,
through: :deployment_merge_requests
KNOWN_MERGE_PARAMS = [
:auto_merge_strategy,
:should_remove_source_branch,
:force_remove_source_branch,
:commit_message,
:squash_commit_message,
:sha
].freeze
serialize :merge_params, Hash # rubocop:disable Cop/ActiveRecordSerialize
after_create :ensure_merge_request_diff
after_update :clear_memoized_shas
after_update :reload_diff_if_branch_changed
after_save :ensure_metrics, unless: :importing?
after_commit :expire_etag_cache, unless: :importing?
# When this attribute is true some MR validation is ignored
# It allows us to close or modify broken merge requests
attr_accessor :allow_broken
# Temporary fields to store compare vars
# when creating new merge request
attr_accessor :can_be_created, :compare_commits, :diff_options, :compare
# Keep states definition to be evaluated before the state_machine block to avoid spec failures.
# If this gets evaluated after, the `merged` and `locked` states which are overrided can be nil.
def self.available_state_names
super + [:merged, :locked]
end
state_machine :state_id, initial: :opened, initialize: false do
event :close do
transition [:opened] => :closed
end
event :mark_as_merged do
transition [:opened, :locked] => :merged
end
event :reopen do
transition closed: :opened
end
event :lock_mr do
transition [:opened] => :locked
end
event :unlock_mr do
transition locked: :opened
end
before_transition any => :opened do |merge_request|
merge_request.merge_jid = nil
end
after_transition any => :opened do |merge_request|
merge_request.run_after_commit do
UpdateHeadPipelineForMergeRequestWorker.perform_async(merge_request.id)
end
end
state :opened, value: MergeRequest.available_states[:opened]
state :closed, value: MergeRequest.available_states[:closed]
state :merged, value: MergeRequest.available_states[:merged]
state :locked, value: MergeRequest.available_states[:locked]
end
# Alias to state machine .with_state_id method
# This needs to be defined after the state machine block to avoid errors
class << self
alias_method :with_state, :with_state_id
alias_method :with_states, :with_state_ids
end
state_machine :merge_status, initial: :unchecked do
event :mark_as_unchecked do
transition [:can_be_merged, :checking, :unchecked] => :unchecked
transition [:cannot_be_merged, :cannot_be_merged_recheck] => :cannot_be_merged_recheck
end
event :mark_as_checking do
transition [:unchecked, :cannot_be_merged_recheck] => :checking
end
event :mark_as_mergeable do
transition [:unchecked, :cannot_be_merged_recheck, :checking] => :can_be_merged
end
event :mark_as_unmergeable do
transition [:unchecked, :cannot_be_merged_recheck, :checking] => :cannot_be_merged
end
state :unchecked
state :cannot_be_merged_recheck
state :checking
state :can_be_merged
state :cannot_be_merged
around_transition do |merge_request, transition, block|
Gitlab::Timeless.timeless(merge_request, &block)
end
# rubocop: disable CodeReuse/ServiceClass
after_transition unchecked: :cannot_be_merged do |merge_request, transition|
if merge_request.notify_conflict?
NotificationService.new.merge_request_unmergeable(merge_request)
TodoService.new.merge_request_became_unmergeable(merge_request)
end
end
# rubocop: enable CodeReuse/ServiceClass
def check_state?(merge_status)
[:unchecked, :cannot_be_merged_recheck, :checking].include?(merge_status.to_sym)
end
end
validates :source_project, presence: true, unless: [:allow_broken, :importing?, :closed_without_fork?]
validates :source_branch, presence: true
validates :target_project, presence: true
validates :target_branch, presence: true
validates :merge_user, presence: true, if: :auto_merge_enabled?, unless: :importing?
validate :validate_branches, unless: [:allow_broken, :importing?, :closed_without_fork?]
validate :validate_fork, unless: :closed_without_fork?
validate :validate_target_project, on: :create
scope :by_source_or_target_branch, ->(branch_name) do
where("source_branch = :branch OR target_branch = :branch", branch: branch_name)
end
scope :by_milestone, ->(milestone) { where(milestone_id: milestone) }
scope :of_projects, ->(ids) { where(target_project_id: ids) }
scope :from_project, ->(project) { where(source_project_id: project.id) }
scope :from_and_to_forks, ->(project) do
where('source_project_id <> target_project_id AND (source_project_id = ? OR target_project_id = ?)', project.id, project.id)
end
scope :merged, -> { with_state(:merged) }
scope :closed_and_merged, -> { with_states(:closed, :merged) }
scope :open_and_closed, -> { with_states(:opened, :closed) }
scope :from_source_branches, ->(branches) { where(source_branch: branches) }
scope :by_commit_sha, ->(sha) do
where('EXISTS (?)', MergeRequestDiff.select(1).where('merge_requests.latest_merge_request_diff_id = merge_request_diffs.id').by_commit_sha(sha)).reorder(nil)
end
scope :by_merge_commit_sha, -> (sha) do
where(merge_commit_sha: sha)
end
scope :by_cherry_pick_sha, -> (sha) do
joins(:notes).where(notes: { commit_id: sha })
end
scope :join_project, -> { joins(:target_project) }
scope :references_project, -> { references(:target_project) }
scope :with_api_entity_associations, -> {
preload(:assignees, :author, :unresolved_notes, :labels, :milestone,
:timelogs, :latest_merge_request_diff,
metrics: [:latest_closed_by, :merged_by],
target_project: [:route, { namespace: :route }],
source_project: [:route, { namespace: :route }])
}
scope :by_target_branch_wildcard, ->(wildcard_branch_name) do
where("target_branch LIKE ?", ApplicationRecord.sanitize_sql_like(wildcard_branch_name).tr('*', '%'))
end
scope :by_target_branch, ->(branch_name) { where(target_branch: branch_name) }
scope :preload_source_project, -> { preload(:source_project) }
scope :with_auto_merge_enabled, -> do
with_state(:opened).where(auto_merge_enabled: true)
end
ignore_column :state, remove_with: '12.7', remove_after: '2019-12-22'
after_save :keep_around_commit, unless: :importing?
alias_attribute :project, :target_project
alias_attribute :project_id, :target_project_id
# Currently, `merge_when_pipeline_succeeds` column is used as a flag
# to check if _any_ auto merge strategy is activated on the merge request.
# Today, we have multiple strategies and MWPS is one of them.
# we'd eventually rename the column for avoiding confusions, but in the mean time
# please use `auto_merge_enabled` alias instead of `merge_when_pipeline_succeeds`.
alias_attribute :auto_merge_enabled, :merge_when_pipeline_succeeds
alias_method :issuing_parent, :target_project
delegate :active?, to: :head_pipeline, prefix: true, allow_nil: true
delegate :success?, :active?, to: :actual_head_pipeline, prefix: true, allow_nil: true
RebaseLockTimeout = Class.new(StandardError)
def self.reference_prefix
'!'
end
# Returns the top 100 target branches
#
# The returned value is a Array containing branch names
# sort by updated_at of merge request:
#
# ['master', 'develop', 'production']
#
# limit - The maximum number of target branch to return.
def self.recent_target_branches(limit: 100)
group(:target_branch)
.select(:target_branch)
.reorder(arel_table[:updated_at].maximum.desc)
.limit(limit)
.pluck(:target_branch)
end
def rebase_in_progress?
rebase_jid.present? && Gitlab::SidekiqStatus.running?(rebase_jid)
end
# Use this method whenever you need to make sure the head_pipeline is synced with the
# branch head commit, for example checking if a merge request can be merged.
# For more information check: https://gitlab.com/gitlab-org/gitlab-foss/issues/40004
def actual_head_pipeline
head_pipeline&.matches_sha_or_source_sha?(diff_head_sha) ? head_pipeline : nil
end
def merge_pipeline
return unless merged?
target_project.pipeline_for(target_branch, merge_commit_sha)
end
# Pattern used to extract `!123` merge request references from text
#
# This pattern supports cross-project references.
def self.reference_pattern
@reference_pattern ||= %r{
(#{Project.reference_pattern})?
#{Regexp.escape(reference_prefix)}(?<merge_request>\d+)
}x
end
def self.link_reference_pattern
@link_reference_pattern ||= super("merge_requests", /(?<merge_request>\d+)/)
end
def self.reference_valid?(reference)
reference.to_i > 0 && reference.to_i <= Gitlab::Database::MAX_INT_VALUE
end
def self.project_foreign_key
'target_project_id'
end
# Returns all the merge requests from an ActiveRecord:Relation.
#
# This method uses a UNION as it usually operates on the result of
# ProjectsFinder#execute. PostgreSQL in particular doesn't always like queries
# using multiple sub-queries especially when combined with an OR statement.
# UNIONs on the other hand perform much better in these cases.
#
# relation - An ActiveRecord::Relation that returns a list of Projects.
#
# Returns an ActiveRecord::Relation.
def self.in_projects(relation)
# unscoping unnecessary conditions that'll be applied
# when executing `where("merge_requests.id IN (#{union.to_sql})")`
source = unscoped.where(source_project_id: relation)
target = unscoped.where(target_project_id: relation)
from_union([source, target])
end
# This is used after project import, to reset the IDs to the correct
# values. It is not intended to be called without having already scoped the
# relation.
def self.set_latest_merge_request_diff_ids!
update = '
latest_merge_request_diff_id = (
SELECT MAX(id)
FROM merge_request_diffs
WHERE merge_requests.id = merge_request_diffs.merge_request_id
)'.squish
self.each_batch do |batch|
batch.update_all(update)
end
end
WIP_REGEX = /\A*(\[WIP\]\s*|WIP:\s*|WIP\s+)+\s*/i.freeze
def self.work_in_progress?(title)
!!(title =~ WIP_REGEX)
end
def self.wipless_title(title)
title.sub(WIP_REGEX, "")
end
def self.wip_title(title)
work_in_progress?(title) ? title : "WIP: #{title}"
end
def committers
@committers ||= commits.committers
end
# Verifies if title has changed not taking into account WIP prefix
# for merge requests.
def wipless_title_changed(old_title)
self.class.wipless_title(old_title) != self.wipless_title
end
def hook_attrs
Gitlab::HookData::MergeRequestBuilder.new(self).build
end
# `from` argument can be a Namespace or Project.
def to_reference(from = nil, full: false)
reference = "#{self.class.reference_prefix}#{iid}"
"#{project.to_reference_base(from, full: full)}#{reference}"
end
def context_commits
@context_commits ||= merge_request_context_commits.map(&:to_commit)
end
def commits(limit: nil)
return merge_request_diff.commits(limit: limit) if persisted?
commits_arr = if compare_commits
reversed_commits = compare_commits.reverse
limit ? reversed_commits.take(limit) : reversed_commits
else
[]
end
CommitCollection.new(source_project, commits_arr, source_branch)
end
def recent_commits
commits(limit: MergeRequestDiff::COMMITS_SAFE_SIZE)
end
def commits_count
if persisted?
merge_request_diff.commits_count
elsif compare_commits
compare_commits.size
else
0
end
end
def commit_shas(limit: nil)
return merge_request_diff.commit_shas(limit: limit) if persisted?
shas =
if compare_commits
compare_commits.to_a.reverse.map(&:sha)
else
Array(diff_head_sha)
end
limit ? shas.take(limit) : shas
end
def supports_suggestion?
true
end
# Calls `MergeWorker` to proceed with the merge process and
# updates `merge_jid` with the MergeWorker#jid.
# This helps tracking enqueued and ongoing merge jobs.
def merge_async(user_id, params)
jid = MergeWorker.perform_async(id, user_id, params.to_h)
update_column(:merge_jid, jid)
# merge_ongoing? depends on merge_jid
# expire etag cache since the attribute is changed without triggering callbacks
expire_etag_cache
end
# Set off a rebase asynchronously, atomically updating the `rebase_jid` of
# the MR so that the status of the operation can be tracked.
def rebase_async(user_id, skip_ci: false)
with_rebase_lock do
raise ActiveRecord::StaleObjectError if !open? || rebase_in_progress?
# Although there is a race between setting rebase_jid here and clearing it
# in the RebaseWorker, it can't do any harm since we check both that the
# attribute is set *and* that the sidekiq job is still running. So a JID
# for a completed RebaseWorker is equivalent to a nil JID.
jid = Sidekiq::Worker.skipping_transaction_check do
RebaseWorker.perform_async(id, user_id, skip_ci)
end
update_column(:rebase_jid, jid)
end
# rebase_in_progress? depends on rebase_jid
# expire etag cache since the attribute is changed without triggering callbacks
expire_etag_cache
end
def merge_participants
participants = [author]
if auto_merge_enabled? && !participants.include?(merge_user)
participants << merge_user
end
participants
end
def first_commit
merge_request_diff ? merge_request_diff.first_commit : compare_commits.first
end
def raw_diffs(*args)
merge_request_diff ? merge_request_diff.raw_diffs(*args) : compare.raw_diffs(*args)
end
def diffs(diff_options = {})
if compare
# When saving MR diffs, `expanded` is implicitly added (because we need
# to save the entire contents to the DB), so add that here for
# consistency.
compare.diffs(diff_options.merge(expanded: true))
else
merge_request_diff.diffs(diff_options)
end
end
def non_latest_diffs
merge_request_diffs.where.not(id: merge_request_diff.id)
end
# Overwritten in EE
def note_positions_for_paths(paths, _user = nil)
positions = notes.new_diff_notes.joins(:note_diff_file)
.where('note_diff_files.old_path IN (?) OR note_diff_files.new_path IN (?)', paths, paths)
.positions
Gitlab::Diff::PositionCollection.new(positions, diff_head_sha)
end
def preloads_discussion_diff_highlighting?
true
end
def discussions_diffs
strong_memoize(:discussions_diffs) do
note_diff_files = NoteDiffFile
.joins(:diff_note)
.merge(notes.or(commit_notes))
.includes(diff_note: :project)
Gitlab::DiscussionsDiff::FileCollection.new(note_diff_files.to_a)
end
end
def diff_size
# Calling `merge_request_diff.diffs.real_size` will also perform
# highlighting, which we don't need here.
merge_request_diff&.real_size || diffs.real_size
end
def modified_paths(past_merge_request_diff: nil)
diffs = if past_merge_request_diff
past_merge_request_diff
elsif compare
compare
else
self.merge_request_diff
end
diffs.modified_paths
end
def diff_base_commit
if persisted?
merge_request_diff.base_commit
else
branch_merge_base_commit
end
end
def diff_start_commit
if persisted?
merge_request_diff.start_commit
else
target_branch_head
end
end
def diff_head_commit
if persisted?
merge_request_diff.head_commit
else
source_branch_head
end
end
def diff_start_sha
if persisted?
merge_request_diff.start_commit_sha
else
target_branch_head.try(:sha)
end
end
def diff_base_sha
if persisted?
merge_request_diff.base_commit_sha
else
branch_merge_base_commit.try(:sha)
end
end
def diff_head_sha
if persisted?
merge_request_diff.head_commit_sha
else
source_branch_head.try(:sha)
end
end
# When importing a pull request from GitHub, the old and new branches may no
# longer actually exist by those names, but we need to recreate the merge
# request diff with the right source and target shas.
# We use these attributes to force these to the intended values.
attr_writer :target_branch_sha, :source_branch_sha
def source_branch_ref
return @source_branch_sha if @source_branch_sha
return unless source_branch
Gitlab::Git::BRANCH_REF_PREFIX + source_branch
end
def target_branch_ref
return @target_branch_sha if @target_branch_sha
return unless target_branch
Gitlab::Git::BRANCH_REF_PREFIX + target_branch
end
def source_branch_head
strong_memoize(:source_branch_head) do
if source_project && source_branch_ref
source_project.repository.commit(source_branch_ref)
end
end
end
def target_branch_head
strong_memoize(:target_branch_head) do
target_project.repository.commit(target_branch_ref)
end
end
def branch_merge_base_commit
start_sha = target_branch_sha
head_sha = source_branch_sha
if start_sha && head_sha
target_project.merge_base_commit(start_sha, head_sha)
end
end
def target_branch_sha
@target_branch_sha || target_branch_head.try(:sha)
end
def source_branch_sha
@source_branch_sha || source_branch_head.try(:sha)
end
def diff_refs
if importing? || persisted?
merge_request_diff.diff_refs
else
repository_diff_refs
end
end
# Instead trying to fetch the
# persisted diff_refs, this method goes
# straight to the repository to get the
# most recent data possible.
def repository_diff_refs
Gitlab::Diff::DiffRefs.new(
base_sha: branch_merge_base_sha,
start_sha: target_branch_sha,
head_sha: source_branch_sha
)
end
def branch_merge_base_sha
branch_merge_base_commit.try(:sha)
end
def validate_branches
return unless target_project && source_project
if target_project == source_project && target_branch == source_branch
errors.add :branch_conflict, "You can't use same project/branch for source and target"
return
end
[:source_branch, :target_branch].each { |attr| validate_branch_name(attr) }
if opened?
similar_mrs = target_project
.merge_requests
.where(source_branch: source_branch, target_branch: target_branch)
.where(source_project_id: source_project&.id)
.opened
similar_mrs = similar_mrs.where.not(id: id) if persisted?
conflict = similar_mrs.first
if conflict.present?
errors.add(
:validate_branches,
"Another open merge request already exists for this source branch: #{conflict.to_reference}"
)
end
end
end
def validate_branch_name(attr)
return unless will_save_change_to_attribute?(attr)
branch = read_attribute(attr)
return unless branch
errors.add(attr) unless Gitlab::GitRefValidator.validate_merge_request_branch(branch)
end
def validate_target_project
return true if target_project.merge_requests_enabled?
errors.add :base, 'Target project has disabled merge requests'
end
def validate_fork
return true unless target_project && source_project
return true if target_project == source_project
return true unless source_project_missing?
errors.add :validate_fork,
'Source project is not a fork of the target project'
end
def merge_ongoing?
# While the MergeRequest is locked, it should present itself as 'merge ongoing'.
# The unlocking process is handled by StuckMergeJobsWorker scheduled in Cron.
return true if locked?
!!merge_jid && !merged? && Gitlab::SidekiqStatus.running?(merge_jid)
end
def closed_without_fork?
closed? && source_project_missing?
end
def source_project_missing?
return false unless for_fork?
return true unless source_project
!source_project.in_fork_network_of?(target_project)
end
def reopenable?
closed? && !source_project_missing? && source_branch_exists?
end
def ensure_merge_request_diff
merge_request_diff || create_merge_request_diff
end
def create_merge_request_diff
fetch_ref!
# n+1: https://gitlab.com/gitlab-org/gitlab-foss/issues/37435
Gitlab::GitalyClient.allow_n_plus_1_calls do
merge_request_diffs.create!
reload_merge_request_diff
end
end
def viewable_diffs
@viewable_diffs ||= merge_request_diffs.viewable.to_a
end
def merge_request_diff_for(diff_refs_or_sha)
matcher =
if diff_refs_or_sha.is_a?(Gitlab::Diff::DiffRefs)
{
'start_commit_sha' => diff_refs_or_sha.start_sha,
'head_commit_sha' => diff_refs_or_sha.head_sha,
'base_commit_sha' => diff_refs_or_sha.base_sha
}
else
{ 'head_commit_sha' => diff_refs_or_sha }
end
viewable_diffs.find do |diff|
diff.attributes.slice(*matcher.keys) == matcher
end
end
def version_params_for(diff_refs)
if diff = merge_request_diff_for(diff_refs)
{ diff_id: diff.id }
elsif diff = merge_request_diff_for(diff_refs.head_sha)
{
diff_id: diff.id,
start_sha: diff_refs.start_sha
}
end
end
def clear_memoized_shas
@target_branch_sha = @source_branch_sha = nil
clear_memoization(:source_branch_head)
clear_memoization(:target_branch_head)
end
def reload_diff_if_branch_changed
if (saved_change_to_source_branch? || saved_change_to_target_branch?) &&
(source_branch_head && target_branch_head)
reload_diff
end
end
# rubocop: disable CodeReuse/ServiceClass
def reload_diff(current_user = nil)
return unless open?
MergeRequests::ReloadDiffsService.new(self, current_user).execute
end
def check_mergeability(async: false)
return unless recheck_merge_status?
check_service = MergeRequests::MergeabilityCheckService.new(self)
if async && Feature.enabled?(:async_merge_request_check_mergeability, project)
check_service.async_execute
else
check_service.execute(retry_lease: false)
end
end
# rubocop: enable CodeReuse/ServiceClass
def diffable_merge_ref?
Feature.enabled?(:diff_compare_with_head, target_project) && can_be_merged? && merge_ref_head.present?
end
# Returns boolean indicating the merge_status should be rechecked in order to
# switch to either can_be_merged or cannot_be_merged.
def recheck_merge_status?
self.class.state_machines[:merge_status].check_state?(merge_status)
end
def merge_event
@merge_event ||= target_project.events.where(target_id: self.id, target_type: "MergeRequest", action: Event::MERGED).last
end
def closed_event
@closed_event ||= target_project.events.where(target_id: self.id, target_type: "MergeRequest", action: Event::CLOSED).last
end
def work_in_progress?
self.class.work_in_progress?(title)
end
def wipless_title
self.class.wipless_title(self.title)
end
def wip_title
self.class.wip_title(self.title)
end
def mergeable?(skip_ci_check: false)
return false unless mergeable_state?(skip_ci_check: skip_ci_check)
check_mergeability
can_be_merged? && !should_be_rebased?
end
def mergeable_state?(skip_ci_check: false, skip_discussions_check: false)
return false unless open?
return false if work_in_progress?
return false if broken?
return false unless skip_ci_check || mergeable_ci_state?
return false unless skip_discussions_check || mergeable_discussions_state?
true
end
def ff_merge_possible?
project.repository.ancestor?(target_branch_sha, diff_head_sha)
end
def should_be_rebased?
project.ff_merge_must_be_possible? && !ff_merge_possible?
end
def can_cancel_auto_merge?(current_user)
can_be_merged_by?(current_user) || self.author == current_user
end
def can_remove_source_branch?(current_user)
!ProtectedBranch.protected?(source_project, source_branch) &&
!source_project.root_ref?(source_branch) &&
Ability.allowed?(current_user, :push_code, source_project) &&
diff_head_sha == source_branch_head.try(:sha)
end
def should_remove_source_branch?
Gitlab::Utils.to_boolean(merge_params['should_remove_source_branch'])
end
def force_remove_source_branch?
Gitlab::Utils.to_boolean(merge_params['force_remove_source_branch'])
end
def auto_merge_strategy
return unless auto_merge_enabled?
merge_params['auto_merge_strategy'] || AutoMergeService::STRATEGY_MERGE_WHEN_PIPELINE_SUCCEEDS
end
def auto_merge_strategy=(strategy)
merge_params['auto_merge_strategy'] = strategy
end
def remove_source_branch?
should_remove_source_branch? || force_remove_source_branch?
end
def notify_conflict?
(opened? || locked?) &&
has_commits? &&
!branch_missing? &&
!project.repository.can_be_merged?(diff_head_sha, target_branch)
rescue Gitlab::Git::CommandError
# Checking mergeability can trigger exception, e.g. non-utf8
# We ignore this type of errors.
false
end
def related_notes
# We're using a UNION ALL here since this results in better performance
# compared to using OR statements. We're using UNION ALL since the queries
# used won't produce any duplicates (e.g. a note for a commit can't also be
# a note for an MR).
Note
.from_union([notes, commit_notes], remove_duplicates: false)
.includes(:noteable)
end
alias_method :discussion_notes, :related_notes
def commit_notes
# Fetch comments only from last 100 commits
commit_ids = commit_shas(limit: 100)
Note
.user
.where(project_id: [source_project_id, target_project_id])
.for_commit_id(commit_ids)
end
def mergeable_discussions_state?
return true unless project.only_allow_merge_if_all_discussions_are_resolved?
unresolved_notes.none?(&:to_be_resolved?)
end
def for_fork?
target_project != source_project
end
# If the merge request closes any issues, save this information in the
# `MergeRequestsClosingIssues` model. This is a performance optimization.
# Calculating this information for a number of merge requests requires
# running `ReferenceExtractor` on each of them separately.
# This optimization does not apply to issues from external sources.
def cache_merge_request_closes_issues!(current_user = self.author)
return unless project.issues_enabled?
return if closed? || merged?
transaction do
self.merge_requests_closing_issues.delete_all
closes_issues(current_user).each do |issue|
next if issue.is_a?(ExternalIssue)
self.merge_requests_closing_issues.create!(issue: issue)
end
end
end
def visible_closing_issues_for(current_user = self.author)
strong_memoize(:visible_closing_issues_for) do
if self.target_project.has_external_issue_tracker?
closes_issues(current_user)
else
cached_closes_issues.select do |issue|
Ability.allowed?(current_user, :read_issue, issue)
end
end
end
end
# Return the set of issues that will be closed if this merge request is accepted.
def closes_issues(current_user = self.author)
if target_branch == project.default_branch
messages = [title, description]
messages.concat(commits.map(&:safe_message)) if merge_request_diff
Gitlab::ClosingIssueExtractor.new(project, current_user)
.closed_by_message(messages.join("\n"))
else
[]
end
end
def issues_mentioned_but_not_closing(current_user)
return [] unless target_branch == project.default_branch
ext = Gitlab::ReferenceExtractor.new(project, current_user)
ext.analyze("#{title}\n#{description}")
ext.issues - visible_closing_issues_for(current_user)
end
def target_project_path
if target_project
target_project.full_path
else
"(removed)"
end
end
def source_project_path
if source_project
source_project.full_path
else
"(removed)"
end
end
def source_project_namespace
if source_project && source_project.namespace
source_project.namespace.full_path
else
"(removed)"
end
end
def target_project_namespace
if target_project && target_project.namespace
target_project.namespace.full_path
else
"(removed)"
end
end
def source_branch_exists?
return false unless self.source_project
self.source_project.repository.branch_exists?(self.source_branch)
end
def target_branch_exists?
return false unless self.target_project
self.target_project.repository.branch_exists?(self.target_branch)
end
def default_merge_commit_message(include_description: false)
closes_issues_references = visible_closing_issues_for.map do |issue|
issue.to_reference(target_project)
end
message = [
"Merge branch '#{source_branch}' into '#{target_branch}'",
title
]
if !include_description && closes_issues_references.present?
message << "Closes #{closes_issues_references.to_sentence}"
end
message << "#{description}" if include_description && description.present?
message << "See merge request #{to_reference(full: true)}"
message.join("\n\n")
end
# Returns the oldest multi-line commit message, or the MR title if none found
def default_squash_commit_message
strong_memoize(:default_squash_commit_message) do
recent_commits.without_merge_commits.reverse_each.find(&:description?)&.safe_message || title
end
end
# Return array of possible target branches
# depends on target project of MR
def target_branches
if target_project.nil?
[]
else
target_project.repository.branch_names
end
end
# Return array of possible source branches
# depends on source project of MR
def source_branches
if source_project.nil?
[]
else
source_project.repository.branch_names
end
end
def has_ci?
return false if has_no_commits?
!!(head_pipeline_id || all_pipelines.any? || source_project&.ci_service)
end
def branch_missing?
!source_branch_exists? || !target_branch_exists?
end
def broken?
has_no_commits? || branch_missing? || cannot_be_merged?
end
def can_be_merged_by?(user)
access = ::Gitlab::UserAccess.new(user, project: project)
access.can_update_branch?(target_branch)
end
def can_be_merged_via_command_line_by?(user)
access = ::Gitlab::UserAccess.new(user, project: project)
access.can_push_to_branch?(target_branch)
end
def mergeable_ci_state?
return true unless project.only_allow_merge_if_pipeline_succeeds?
return false unless actual_head_pipeline
actual_head_pipeline.success?
end
def environments_for(current_user, latest: false)
return [] unless diff_head_commit
envs = EnvironmentsFinder.new(target_project, current_user,
ref: target_branch, commit: diff_head_commit, with_tags: true, find_latest: latest).execute
if source_project
envs.concat EnvironmentsFinder.new(source_project, current_user,
ref: source_branch, commit: diff_head_commit, find_latest: latest).execute
end
envs.uniq
end
##
# This method is for looking for active environments which created via pipelines for merge requests.
# Since deployments run on a merge request ref (e.g. `refs/merge-requests/:iid/head`),
# we cannot look up environments with source branch name.
def environments
return Environment.none unless actual_head_pipeline&.merge_request?
actual_head_pipeline.environments
end
def fetch_ref!
target_project.repository.fetch_source_branch!(source_project.repository, source_branch, ref_path)
end
# Returns the current merge-ref HEAD commit.
#
def merge_ref_head
project.repository.commit(merge_ref_path)
end
def ref_path
"refs/#{Repository::REF_MERGE_REQUEST}/#{iid}/head"
end
def merge_ref_path
"refs/#{Repository::REF_MERGE_REQUEST}/#{iid}/merge"
end
def train_ref_path
"refs/#{Repository::REF_MERGE_REQUEST}/#{iid}/train"
end
def cleanup_refs(only: :all)
target_refs = []
target_refs << ref_path if %i[all head].include?(only)
target_refs << merge_ref_path if %i[all merge].include?(only)
target_refs << train_ref_path if %i[all train].include?(only)
project.repository.delete_refs(*target_refs)
end
def self.merge_request_ref?(ref)
ref.start_with?("refs/#{Repository::REF_MERGE_REQUEST}/")
end
def self.merge_train_ref?(ref)
%r{\Arefs/#{Repository::REF_MERGE_REQUEST}/\d+/train\z}.match?(ref)
end
def in_locked_state
lock_mr
yield
ensure
unlock_mr
end
def diverged_commits_count
cache = Rails.cache.read(:"merge_request_#{id}_diverged_commits")
if cache.blank? || cache[:source_sha] != source_branch_sha || cache[:target_sha] != target_branch_sha
cache = {
source_sha: source_branch_sha,
target_sha: target_branch_sha,
diverged_commits_count: compute_diverged_commits_count
}
Rails.cache.write(:"merge_request_#{id}_diverged_commits", cache)
end
cache[:diverged_commits_count]
end
def compute_diverged_commits_count
return 0 unless source_branch_sha && target_branch_sha
target_project.repository
.count_commits_between(source_branch_sha, target_branch_sha)
end
private :compute_diverged_commits_count
def diverged_from_target_branch?
diverged_commits_count > 0
end
def all_pipelines
strong_memoize(:all_pipelines) do
MergeRequest::Pipelines.new(self).all
end
end
def update_head_pipeline
find_actual_head_pipeline.try do |pipeline|
self.head_pipeline = pipeline
update_column(:head_pipeline_id, head_pipeline.id) if head_pipeline_id_changed?
end
end
def has_test_reports?
actual_head_pipeline&.has_reports?(Ci::JobArtifact.test_reports)
end
def predefined_variables
Gitlab::Ci::Variables::Collection.new.tap do |variables|
variables.append(key: 'CI_MERGE_REQUEST_ID', value: id.to_s)
variables.append(key: 'CI_MERGE_REQUEST_IID', value: iid.to_s)
variables.append(key: 'CI_MERGE_REQUEST_REF_PATH', value: ref_path.to_s)
variables.append(key: 'CI_MERGE_REQUEST_PROJECT_ID', value: project.id.to_s)
variables.append(key: 'CI_MERGE_REQUEST_PROJECT_PATH', value: project.full_path)
variables.append(key: 'CI_MERGE_REQUEST_PROJECT_URL', value: project.web_url)
variables.append(key: 'CI_MERGE_REQUEST_TARGET_BRANCH_NAME', value: target_branch.to_s)
variables.append(key: 'CI_MERGE_REQUEST_TITLE', value: title)
variables.append(key: 'CI_MERGE_REQUEST_ASSIGNEES', value: assignee_username_list) if assignees.any?
variables.append(key: 'CI_MERGE_REQUEST_MILESTONE', value: milestone.title) if milestone
variables.append(key: 'CI_MERGE_REQUEST_LABELS', value: label_names.join(',')) if labels.present?
variables.concat(source_project_variables)
end
end
def compare_test_reports
unless has_test_reports?
return { status: :error, status_reason: 'This merge request does not have test reports' }
end
compare_reports(Ci::CompareTestReportsService)
end
def has_exposed_artifacts?
return false unless Feature.enabled?(:ci_expose_arbitrary_artifacts_in_mr, default_enabled: true)
actual_head_pipeline&.has_exposed_artifacts?
end
# TODO: this method and compare_test_reports use the same
# result type, which is handled by the controller's #reports_response.
# we should minimize mistakes by isolating the common parts.
# issue: https://gitlab.com/gitlab-org/gitlab/issues/34224
def find_exposed_artifacts
unless has_exposed_artifacts?
return { status: :error, status_reason: 'This merge request does not have exposed artifacts' }
end
compare_reports(Ci::GenerateExposedArtifactsReportService)
end
# TODO: consider renaming this as with exposed artifacts we generate reports,
# not always compare
# issue: https://gitlab.com/gitlab-org/gitlab/issues/34224
def compare_reports(service_class, current_user = nil)
with_reactive_cache(service_class.name, current_user&.id) do |data|
unless service_class.new(project, current_user)
.latest?(base_pipeline, actual_head_pipeline, data)
raise InvalidateReactiveCache
end
data
end || { status: :parsing }
end
def calculate_reactive_cache(identifier, current_user_id = nil, *args)
service_class = identifier.constantize
# TODO: the type check should change to something that includes exposed artifacts service
# issue: https://gitlab.com/gitlab-org/gitlab/issues/34224
raise NameError, service_class unless service_class < Ci::CompareReportsBaseService
current_user = User.find_by(id: current_user_id)
service_class.new(project, current_user).execute(base_pipeline, actual_head_pipeline)
end
def all_commits
MergeRequestDiffCommit
.where(merge_request_diff: merge_request_diffs.recent)
.limit(10_000)
end
# Note that this could also return SHA from now dangling commits
#
def all_commit_shas
@all_commit_shas ||= begin
return commit_shas unless persisted?
all_commits.pluck(:sha).uniq
end
end
def merge_commit
@merge_commit ||= project.commit(merge_commit_sha) if merge_commit_sha
end
def short_merge_commit_sha
Commit.truncate_sha(merge_commit_sha) if merge_commit_sha
end
def can_be_reverted?(current_user)
return false unless merge_commit
return false unless merged_at
# It is not guaranteed that Note#created_at will be strictly later than
# MergeRequestMetric#merged_at. Nanoseconds on MySQL may break this
# comparison, as will a HA environment if clocks are not *precisely*
# synchronized. Add a minute's leeway to compensate for both possibilities
cutoff = merged_at - 1.minute
notes_association = notes_with_associations.where('created_at >= ?', cutoff)
!merge_commit.has_been_reverted?(current_user, notes_association)
end
def merged_at
strong_memoize(:merged_at) do
next unless merged?
metrics&.merged_at ||
merge_event&.created_at ||
notes.system.reorder(nil).find_by(note: 'merged')&.created_at
end
end
def can_be_cherry_picked?
merge_commit.present?
end
def has_complete_diff_refs?
diff_refs && diff_refs.complete?
end
# rubocop: disable CodeReuse/ServiceClass
def update_diff_discussion_positions(old_diff_refs:, new_diff_refs:, current_user: nil)
return unless has_complete_diff_refs?
return if new_diff_refs == old_diff_refs
active_diff_discussions = self.notes.new_diff_notes.discussions.select do |discussion|
discussion.active?(old_diff_refs)
end
return if active_diff_discussions.empty?
paths = active_diff_discussions.flat_map { |n| n.diff_file.paths }.uniq
service = Discussions::UpdateDiffPositionService.new(
self.project,
current_user,
old_diff_refs: old_diff_refs,
new_diff_refs: new_diff_refs,
paths: paths
)
active_diff_discussions.each do |discussion|
service.execute(discussion)
end
if project.resolve_outdated_diff_discussions?
MergeRequests::ResolvedDiscussionNotificationService
.new(project, current_user)
.execute(self)
end
end
# rubocop: enable CodeReuse/ServiceClass
def keep_around_commit
project.repository.keep_around(self.merge_commit_sha)
end
def has_commits?
merge_request_diff && commits_count.to_i > 0
end
def has_no_commits?
!has_commits?
end
def mergeable_with_quick_action?(current_user, autocomplete_precheck: false, last_diff_sha: nil)
return false unless can_be_merged_by?(current_user)
return true if autocomplete_precheck
return false unless mergeable?(skip_ci_check: true)
return false if actual_head_pipeline && !(actual_head_pipeline.success? || actual_head_pipeline.active?)
return false if last_diff_sha != diff_head_sha
true
end
def pipeline_coverage_delta
if base_pipeline&.coverage && head_pipeline&.coverage
'%.2f' % (head_pipeline.coverage.to_f - base_pipeline.coverage.to_f)
end
end
def base_pipeline
@base_pipeline ||= project.ci_pipelines
.order(id: :desc)
.find_by(sha: diff_base_sha, ref: target_branch)
end
def discussions_rendered_on_frontend?
true
end
# rubocop: disable CodeReuse/ServiceClass
def update_project_counter_caches
Projects::OpenMergeRequestsCountService.new(target_project).refresh_cache
end
# rubocop: enable CodeReuse/ServiceClass
def first_contribution?
return false if project.team.max_member_access(author_id) > Gitlab::Access::GUEST
project.merge_requests.merged.where(author_id: author_id).empty?
end
# TODO: remove once production database rename completes
# https://gitlab.com/gitlab-org/gitlab-foss/issues/47592
alias_attribute :allow_collaboration, :allow_maintainer_to_push
def allow_collaboration
collaborative_push_possible? && allow_maintainer_to_push
end
alias_method :allow_collaboration?, :allow_collaboration
def collaborative_push_possible?
source_project.present? && for_fork? &&
target_project.visibility_level > Gitlab::VisibilityLevel::PRIVATE &&
source_project.visibility_level > Gitlab::VisibilityLevel::PRIVATE &&
!ProtectedBranch.protected?(source_project, source_branch)
end
def can_allow_collaboration?(user)
collaborative_push_possible? &&
Ability.allowed?(user, :push_code, source_project)
end
def squash_in_progress?
# The source project can be deleted
return false unless source_project
source_project.repository.squash_in_progress?(id)
end
def find_actual_head_pipeline
all_pipelines.for_sha_or_source_sha(diff_head_sha).first
end
def etag_caching_enabled?
true
end
def recent_visible_deployments
deployments.visible.includes(:environment).order(id: :desc).limit(10)
end
private
def with_rebase_lock
if Feature.enabled?(:merge_request_rebase_nowait_lock, default_enabled: true)
with_retried_nowait_lock { yield }
else
with_lock(true) { yield }
end
end
# If the merge request is idle in transaction or has a SELECT FOR
# UPDATE, we don't want to block indefinitely or this could cause a
# queue of SELECT FOR UPDATE calls. Instead, try to get the lock for
# 5 s before raising an error to the user.
def with_retried_nowait_lock
# Try at most 0.25 + (1.5 * .25) + (1.5^2 * .25) ... (1.5^5 * .25) = 5.2 s to get the lock
Retriable.retriable(on: ActiveRecord::LockWaitTimeout, tries: 6, base_interval: 0.25) do
with_lock('FOR UPDATE NOWAIT') do
yield
end
end
rescue ActiveRecord::LockWaitTimeout => e
Gitlab::ErrorTracking.track_exception(e)
raise RebaseLockTimeout, _('Failed to enqueue the rebase operation, possibly due to a long-lived transaction. Try again later.')
end
def source_project_variables
Gitlab::Ci::Variables::Collection.new.tap do |variables|
break variables unless source_project
variables.append(key: 'CI_MERGE_REQUEST_SOURCE_PROJECT_ID', value: source_project.id.to_s)
variables.append(key: 'CI_MERGE_REQUEST_SOURCE_PROJECT_PATH', value: source_project.full_path)
variables.append(key: 'CI_MERGE_REQUEST_SOURCE_PROJECT_URL', value: source_project.web_url)
variables.append(key: 'CI_MERGE_REQUEST_SOURCE_BRANCH_NAME', value: source_branch.to_s)
end
end
def expire_etag_cache
return unless project.namespace
key = Gitlab::Routing.url_helpers.cached_widget_project_json_merge_request_path(project, self, format: :json)
Gitlab::EtagCaching::Store.new.touch(key)
end
end
MergeRequest.prepend_if_ee('::EE::MergeRequest')