debian-mirror-gitlab/app/models/merge_request.rb

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class MergeRequest < ActiveRecord::Base
include InternalId
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include Issuable
include Referable
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include Sortable
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include Taskable
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include Importable
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belongs_to :target_project, foreign_key: :target_project_id, class_name: "Project"
belongs_to :source_project, foreign_key: :source_project_id, class_name: "Project"
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belongs_to :merge_user, class_name: "User"
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has_many :merge_request_diffs, dependent: :destroy
has_one :merge_request_diff,
-> { order('merge_request_diffs.id DESC') }
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has_many :events, as: :target, dependent: :destroy
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has_many :merge_requests_closing_issues, class_name: 'MergeRequestsClosingIssues', dependent: :delete_all
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serialize :merge_params, Hash
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after_create :ensure_merge_request_diff, unless: :importing?
after_update :reload_diff_if_branch_changed
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delegate :commits, :real_size, to: :merge_request_diff, prefix: nil
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# 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
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attr_accessor :can_be_created, :compare_commits, :diff_options, :compare
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state_machine :state, initial: :opened do
event :close do
transition [:reopened, :opened] => :closed
end
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event :mark_as_merged do
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transition [:reopened, :opened, :locked] => :merged
end
event :reopen do
transition closed: :reopened
end
event :lock_mr do
transition [:reopened, :opened] => :locked
end
event :unlock_mr do
transition locked: :reopened
end
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after_transition any => :locked do |merge_request, transition|
merge_request.locked_at = Time.now
merge_request.save
end
after_transition locked: (any - :locked) do |merge_request, transition|
merge_request.locked_at = nil
merge_request.save
end
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state :opened
state :reopened
state :closed
state :merged
state :locked
end
state_machine :merge_status, initial: :unchecked do
event :mark_as_unchecked do
transition [:can_be_merged, :cannot_be_merged] => :unchecked
end
event :mark_as_mergeable do
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transition [:unchecked, :cannot_be_merged] => :can_be_merged
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end
event :mark_as_unmergeable do
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transition [:unchecked, :can_be_merged] => :cannot_be_merged
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end
state :unchecked
state :can_be_merged
state :cannot_be_merged
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around_transition do |merge_request, transition, block|
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Gitlab::Timeless.timeless(merge_request, &block)
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end
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end
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validates :source_project, presence: true, unless: [:allow_broken, :importing?, :closed_without_fork?]
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validates :source_branch, presence: true
validates :target_project, presence: true
validates :target_branch, presence: true
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validates :merge_user, presence: true, if: :merge_when_build_succeeds?
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validate :validate_branches, unless: [:allow_broken, :importing?, :closed_without_fork?]
validate :validate_fork, unless: :closed_without_fork?
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scope :by_branch, ->(branch_name) { where("(source_branch LIKE :branch) OR (target_branch LIKE :branch)", branch: branch_name) }
scope :cared, ->(user) { where('assignee_id = :user OR author_id = :user', user: user.id) }
scope :by_milestone, ->(milestone) { where(milestone_id: milestone) }
scope :of_projects, ->(ids) { where(target_project_id: ids) }
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scope :from_project, ->(project) { where(source_project_id: project.id) }
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scope :merged, -> { with_state(:merged) }
scope :closed_and_merged, -> { with_states(:closed, :merged) }
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scope :from_source_branches, ->(branches) { where(source_branch: branches) }
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scope :join_project, -> { joins(:target_project) }
scope :references_project, -> { references(:target_project) }
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after_save :keep_around_commit
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def self.reference_prefix
'!'
end
# Pattern used to extract `!123` merge request references from text
#
# This pattern supports cross-project references.
def self.reference_pattern
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@reference_pattern ||= %r{
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(#{Project.reference_pattern})?
#{Regexp.escape(reference_prefix)}(?<merge_request>\d+)
}x
end
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def self.link_reference_pattern
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@link_reference_pattern ||= super("merge_requests", /(?<merge_request>\d+)/)
end
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def self.reference_valid?(reference)
reference.to_i > 0 && reference.to_i <= Gitlab::Database::MAX_INT_VALUE
end
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def self.project_foreign_key
'target_project_id'
end
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# 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)
source = where(source_project_id: relation).select(:id)
target = where(target_project_id: relation).select(:id)
union = Gitlab::SQL::Union.new([source, target])
where("merge_requests.id IN (#{union.to_sql})")
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end
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WIP_REGEX = /\A\s*(\[WIP\]\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
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def to_reference(from_project = nil)
reference = "#{self.class.reference_prefix}#{iid}"
if cross_project_reference?(from_project)
reference = project.to_reference + reference
end
reference
end
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def first_commit
merge_request_diff ? merge_request_diff.first_commit : compare_commits.first
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end
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def raw_diffs(*args)
merge_request_diff ? merge_request_diff.raw_diffs(*args) : compare.raw_diffs(*args)
end
def diffs(diff_options = nil)
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if compare
compare.diffs(diff_options)
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else
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merge_request_diff.diffs(diff_options)
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end
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end
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def diff_size
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diffs(diff_options).size
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end
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def diff_base_commit
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if persisted?
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merge_request_diff.base_commit
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else
branch_merge_base_commit
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end
end
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# MRs created before 8.4 don't store a MergeRequestDiff#base_commit_sha,
# but we need to get a commit for the "View file @ ..." link by deleted files,
# so we find the likely one if we can't get the actual one.
# This will not be the actual base commit if the target branch was merged into
# the source branch after the merge request was created, but it is good enough
# for the specific purpose of linking to a commit.
# It is not good enough for use in `Gitlab::Git::DiffRefs`, which needs the
# true base commit, so we can't simply have `#diff_base_commit` fall back on
# this method.
def likely_diff_base_commit
first_commit.parent || first_commit
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
diff_start_commit.try(:sha)
end
def diff_base_sha
diff_base_commit.try(:sha)
end
def diff_head_sha
diff_head_commit.try(:sha)
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_head
source_branch_ref = @source_branch_sha || source_branch
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source_project.repository.commit(source_branch_ref) if source_branch_ref
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end
def target_branch_head
target_branch_ref = @target_branch_sha || target_branch
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target_project.repository.commit(target_branch_ref) if target_branch_ref
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
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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
return unless diff_start_commit || diff_base_commit
Gitlab::Diff::DiffRefs.new(
base_sha: diff_base_sha,
start_sha: diff_start_sha,
head_sha: diff_head_sha
)
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end
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# Return diff_refs instance trying to not touch the git repository
def diff_sha_refs
if merge_request_diff && merge_request_diff.diff_refs_by_sha?
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merge_request_diff.diff_refs
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else
diff_refs
end
end
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def branch_merge_base_sha
branch_merge_base_commit.try(:sha)
end
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def validate_branches
if target_project == source_project && target_branch == source_branch
errors.add :branch_conflict, "You can not use same project/branch for source and target"
end
if opened? || reopened?
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similar_mrs = self.target_project.merge_requests.where(source_branch: source_branch, target_branch: target_branch, source_project_id: source_project.try(:id)).opened
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similar_mrs = similar_mrs.where('id not in (?)', self.id) if self.id
if similar_mrs.any?
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errors.add :validate_branches,
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"Cannot Create: This merge request already exists: #{similar_mrs.pluck(:title)}"
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end
end
end
def validate_fork
return true unless target_project && source_project
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return true if target_project == source_project
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return true unless source_project_missing?
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errors.add :validate_fork,
'Source project is not a fork of the target project'
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end
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def closed_without_fork?
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closed? && source_project_missing?
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end
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def source_project_missing?
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return false unless for_fork?
return true unless source_project
!source_project.forked_from?(target_project)
end
def reopenable?
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closed? && !source_project_missing? && source_branch_exists?
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end
def ensure_merge_request_diff
merge_request_diff || create_merge_request_diff
end
def create_merge_request_diff
merge_request_diffs.create
reload_merge_request_diff
end
def reload_merge_request_diff
merge_request_diff(true)
end
def reload_diff_if_branch_changed
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if source_branch_changed? || target_branch_changed?
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reload_diff
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end
end
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def reload_diff
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return unless open?
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old_diff_refs = self.diff_refs
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create_merge_request_diff
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MergeRequests::MergeRequestDiffCacheService.new.execute(self)
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new_diff_refs = self.diff_refs
update_diff_notes_positions(
old_diff_refs: old_diff_refs,
new_diff_refs: new_diff_refs
)
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end
def check_if_can_be_merged
return unless unchecked?
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can_be_merged =
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!broken? && project.repository.can_be_merged?(diff_head_sha, target_branch)
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if can_be_merged
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mark_as_mergeable
else
mark_as_unmergeable
end
end
def merge_event
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@merge_event ||= target_project.events.where(target_id: self.id, target_type: "MergeRequest", action: Event::MERGED).last
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end
def closed_event
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@closed_event ||= target_project.events.where(target_id: self.id, target_type: "MergeRequest", action: Event::CLOSED).last
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end
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def work_in_progress?
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self.class.work_in_progress?(title)
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end
def wipless_title
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self.class.wipless_title(self.title)
end
def wip_title
self.class.wip_title(self.title)
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end
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def mergeable?(skip_ci_check: false)
return false unless mergeable_state?(skip_ci_check: skip_ci_check)
check_if_can_be_merged
can_be_merged?
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end
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def mergeable_state?(skip_ci_check: false)
return false unless open?
return false if work_in_progress?
return false if broken?
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return false unless skip_ci_check || mergeable_ci_state?
true
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end
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def can_cancel_merge_when_build_succeeds?(current_user)
can_be_merged_by?(current_user) || self.author == current_user
end
def can_remove_source_branch?(current_user)
!source_project.protected_branch?(source_branch) &&
!source_project.root_ref?(source_branch) &&
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Ability.allowed?(current_user, :push_code, source_project) &&
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diff_head_commit == source_branch_head
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end
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def should_remove_source_branch?
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Gitlab::Utils.to_boolean(merge_params['should_remove_source_branch'])
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end
def force_remove_source_branch?
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Gitlab::Utils.to_boolean(merge_params['force_remove_source_branch'])
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end
def remove_source_branch?
should_remove_source_branch? || force_remove_source_branch?
end
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def mr_and_commit_notes
# Fetch comments only from last 100 commits
commits_for_notes_limit = 100
commit_ids = commits.last(commits_for_notes_limit).map(&:id)
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Note.where(
"(project_id = :target_project_id AND noteable_type = 'MergeRequest' AND noteable_id = :mr_id) OR" +
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"((project_id = :source_project_id OR project_id = :target_project_id) AND noteable_type = 'Commit' AND commit_id IN (:commit_ids))",
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mr_id: id,
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commit_ids: commit_ids,
target_project_id: target_project_id,
source_project_id: source_project_id
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)
end
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def discussions
@discussions ||= self.mr_and_commit_notes.
inc_relations_for_view.
fresh.
discussions
end
def diff_discussions
@diff_discussions ||= self.notes.diff_notes.discussions
end
def find_diff_discussion(discussion_id)
notes = self.notes.diff_notes.where(discussion_id: discussion_id).fresh.to_a
return if notes.empty?
Discussion.new(notes)
end
def discussions_resolvable?
diff_discussions.any?(&:resolvable?)
end
def discussions_resolved?
discussions_resolvable? && diff_discussions.none?(&:to_be_resolved?)
end
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def hook_attrs
attrs = {
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source: source_project.try(:hook_attrs),
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target: target_project.hook_attrs,
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last_commit: nil,
work_in_progress: work_in_progress?
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}
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if diff_head_commit
attrs.merge!(last_commit: diff_head_commit.hook_attrs)
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end
attributes.merge!(attrs)
end
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def for_fork?
target_project != source_project
end
def project
target_project
end
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# 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.
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# This optimization does not apply to issues from external sources.
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def cache_merge_request_closes_issues!(current_user = self.author)
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return if project.has_external_issue_tracker?
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transaction do
self.merge_requests_closing_issues.delete_all
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closes_issues(current_user).each do |issue|
self.merge_requests_closing_issues.create!(issue: issue)
end
end
end
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def closes_issue?(issue)
closes_issues.include?(issue)
end
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# Return the set of issues that will be closed if this merge request is accepted.
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def closes_issues(current_user = self.author)
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if target_branch == project.default_branch
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messages = [description]
messages.concat(commits.map(&:safe_message)) if merge_request_diff
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Gitlab::ClosingIssueExtractor.new(project, current_user).
closed_by_message(messages.join("\n"))
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else
[]
end
end
def target_project_path
if target_project
target_project.path_with_namespace
else
"(removed)"
end
end
def source_project_path
if source_project
source_project.path_with_namespace
else
"(removed)"
end
end
def source_project_namespace
if source_project && source_project.namespace
source_project.namespace.path
else
"(removed)"
end
end
def target_project_namespace
if target_project && target_project.namespace
target_project.namespace.path
else
"(removed)"
end
end
def source_branch_exists?
return false unless self.source_project
self.source_project.repository.branch_names.include?(self.source_branch)
end
def target_branch_exists?
return false unless self.target_project
self.target_project.repository.branch_names.include?(self.target_branch)
end
# Reset merge request events cache
#
# Since we do cache @event we need to reset cache in special cases:
# * when a merge request is updated
# Events cache stored like events/23-20130109142513.
# The cache key includes updated_at timestamp.
# Thus it will automatically generate a new fragment
# when the event is updated because the key changes.
def reset_events_cache
Event.reset_event_cache_for(self)
end
def merge_commit_message
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message = "Merge branch '#{source_branch}' into '#{target_branch}'\n\n"
message << "#{title}\n\n"
message << "#{description}\n\n" if description.present?
message << "See merge request #{to_reference}"
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message
end
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def reset_merge_when_build_succeeds
return unless merge_when_build_succeeds?
self.merge_when_build_succeeds = false
self.merge_user = nil
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if merge_params
merge_params.delete('should_remove_source_branch')
merge_params.delete('commit_message')
end
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self.save
end
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# Return array of possible target branches
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# depends on target project of MR
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def target_branches
if target_project.nil?
[]
else
target_project.repository.branch_names
end
end
# Return array of possible source branches
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# depends on source project of MR
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def source_branches
if source_project.nil?
[]
else
source_project.repository.branch_names
end
end
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def locked_long_ago?
return false unless locked?
locked_at.nil? || locked_at < (Time.now - 1.day)
end
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def has_ci?
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source_project.try(:ci_service) && commits.any?
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end
def branch_missing?
!source_branch_exists? || !target_branch_exists?
end
def broken?
self.commits.blank? || branch_missing? || cannot_be_merged?
end
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def can_be_merged_by?(user)
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access = ::Gitlab::UserAccess.new(user, project: project)
access.can_push_to_branch?(target_branch) || access.can_merge_to_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)
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end
def mergeable_ci_state?
return true unless project.only_allow_merge_if_build_succeeds?
!pipeline || pipeline.success?
end
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def environments
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return [] unless diff_head_commit
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@environments ||=
begin
envs = target_project.environments_for(target_branch, diff_head_commit, with_tags: true)
envs.concat(source_project.environments_for(source_branch, diff_head_commit)) if source_project
envs.uniq
end
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end
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def state_human_name
if merged?
"Merged"
elsif closed?
"Closed"
else
"Open"
end
end
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def state_icon_name
if merged?
"check"
elsif closed?
"times"
else
"circle-o"
end
end
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def fetch_ref
target_project.repository.fetch_ref(
source_project.repository.path_to_repo,
"refs/heads/#{source_branch}",
ref_path
)
end
def ref_path
"refs/merge-requests/#{iid}/head"
end
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def ref_fetched?
project.repository.ref_exists?(ref_path)
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end
def ensure_ref_fetched
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fetch_ref unless ref_fetched?
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end
def in_locked_state
begin
lock_mr
yield
ensure
unlock_mr if locked?
end
end
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def diverged_commits_count
cache = Rails.cache.read(:"merge_request_#{id}_diverged_commits")
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if cache.blank? || cache[:source_sha] != source_branch_sha || cache[:target_sha] != target_branch_sha
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cache = {
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source_sha: source_branch_sha,
target_sha: target_branch_sha,
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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
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return 0 unless source_branch_sha && target_branch_sha
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Gitlab::Git::Commit.between(target_project.repository.raw_repository, source_branch_sha, target_branch_sha).size
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end
private :compute_diverged_commits_count
def diverged_from_target_branch?
diverged_commits_count > 0
end
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def commits_sha
commits.map(&:sha)
end
def pipeline
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return unless diff_head_sha && source_project
@pipeline ||= source_project.pipeline_for(source_branch, diff_head_sha)
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end
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def all_pipelines
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return unless source_project
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@all_pipelines ||= source_project.pipelines
.where(sha: all_commits_sha, ref: source_branch)
.order(id: :desc)
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end
# Note that this could also return SHA from now dangling commits
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#
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def all_commits_sha
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if persisted?
merge_request_diffs.flat_map(&:commits_sha).uniq
elsif compare_commits
compare_commits.to_a.reverse.map(&:id)
else
[diff_head_sha]
end
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end
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def merge_commit
@merge_commit ||= project.commit(merge_commit_sha) if merge_commit_sha
end
def can_be_reverted?(current_user = nil)
merge_commit && !merge_commit.has_been_reverted?(current_user, self)
end
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def can_be_cherry_picked?
merge_commit
end
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def has_complete_diff_refs?
diff_sha_refs && diff_sha_refs.complete?
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end
def update_diff_notes_positions(old_diff_refs:, new_diff_refs:)
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return unless has_complete_diff_refs?
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return if new_diff_refs == old_diff_refs
active_diff_notes = self.notes.diff_notes.select do |note|
note.new_diff_note? && note.active?(old_diff_refs)
end
return if active_diff_notes.empty?
paths = active_diff_notes.flat_map { |n| n.diff_file.paths }.uniq
service = Notes::DiffPositionUpdateService.new(
self.project,
nil,
old_diff_refs: old_diff_refs,
new_diff_refs: new_diff_refs,
paths: paths
)
active_diff_notes.each do |note|
service.execute(note)
Gitlab::Timeless.timeless(note, &:save)
end
end
def keep_around_commit
project.repository.keep_around(self.merge_commit_sha)
end
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def conflicts
@conflicts ||= Gitlab::Conflict::FileCollection.new(self)
end
def conflicts_can_be_resolved_by?(user)
access = ::Gitlab::UserAccess.new(user, project: source_project)
access.can_push_to_branch?(source_branch)
end
def conflicts_can_be_resolved_in_ui?
return @conflicts_can_be_resolved_in_ui if defined?(@conflicts_can_be_resolved_in_ui)
return @conflicts_can_be_resolved_in_ui = false unless cannot_be_merged?
return @conflicts_can_be_resolved_in_ui = false unless has_complete_diff_refs?
begin
# Try to parse each conflict. If the MR's mergeable status hasn't been updated,
# ensure that we don't say there are conflicts to resolve when there are no conflict
# files.
conflicts.files.each(&:lines)
@conflicts_can_be_resolved_in_ui = conflicts.files.length > 0
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rescue Rugged::OdbError, Gitlab::Conflict::Parser::UnresolvableError, Gitlab::Conflict::FileCollection::ConflictSideMissing
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@conflicts_can_be_resolved_in_ui = false
end
end
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end