433 lines
		
	
	
		
			11 KiB
		
	
	
	
		
			Ruby
		
	
	
	
			
		
		
	
	
			433 lines
		
	
	
		
			11 KiB
		
	
	
	
		
			Ruby
		
	
	
	
# == Schema Information
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#
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# Table name: merge_requests
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#
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#  id                :integer          not null, primary key
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#  target_branch     :string(255)      not null
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#  source_branch     :string(255)      not null
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#  source_project_id :integer          not null
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#  author_id         :integer
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#  assignee_id       :integer
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#  title             :string(255)
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#  created_at        :datetime
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#  updated_at        :datetime
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#  milestone_id      :integer
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#  state             :string(255)
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#  merge_status      :string(255)
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#  target_project_id :integer          not null
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#  iid               :integer
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#  description       :text
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#  position          :integer          default(0)
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#  locked_at         :datetime
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#
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require Rails.root.join("app/models/commit")
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require Rails.root.join("lib/static_model")
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class MergeRequest < ActiveRecord::Base
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  include InternalId
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  include Issuable
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  include Referable
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  include Sortable
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  include Taskable
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  belongs_to :target_project, foreign_key: :target_project_id, class_name: "Project"
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  belongs_to :source_project, foreign_key: :source_project_id, class_name: "Project"
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  has_one :merge_request_diff, dependent: :destroy
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  after_create :create_merge_request_diff
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  after_update :update_merge_request_diff
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  delegate :commits, :diffs, :last_commit, :last_commit_short_sha, to: :merge_request_diff, prefix: nil
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  attr_accessor :should_remove_source_branch
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  # When this attribute is true some MR validation is ignored
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  # It allows us to close or modify broken merge requests
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  attr_accessor :allow_broken
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  # Temporary fields to store compare vars
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  # when creating new merge request
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  attr_accessor :can_be_created, :compare_failed,
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    :compare_commits, :compare_diffs
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  state_machine :state, initial: :opened do
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    event :close do
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      transition [:reopened, :opened] => :closed
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    end
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    event :merge do
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      transition [:reopened, :opened, :locked] => :merged
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    end
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    event :reopen do
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      transition closed: :reopened
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    end
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    event :lock_mr do
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      transition [:reopened, :opened] => :locked
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    end
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    event :unlock_mr do
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      transition locked: :reopened
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    end
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    after_transition any => :locked do |merge_request, transition|
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      merge_request.locked_at = Time.now
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      merge_request.save
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    end
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    after_transition locked: (any - :locked) do |merge_request, transition|
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      merge_request.locked_at = nil
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      merge_request.save
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    end
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    state :opened
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    state :reopened
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    state :closed
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    state :merged
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    state :locked
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  end
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  state_machine :merge_status, initial: :unchecked do
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    event :mark_as_unchecked do
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      transition [:can_be_merged, :cannot_be_merged] => :unchecked
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    end
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    event :mark_as_mergeable do
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      transition [:unchecked, :cannot_be_merged] => :can_be_merged
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    end
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    event :mark_as_unmergeable do
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      transition [:unchecked, :can_be_merged] => :cannot_be_merged
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    end
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    state :unchecked
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    state :can_be_merged
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    state :cannot_be_merged
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    around_transition do |merge_request, transition, block|
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      merge_request.record_timestamps = false
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      begin
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        block.call
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      ensure
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        merge_request.record_timestamps = true
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      end
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    end
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  end
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  validates :source_project, presence: true, unless: :allow_broken
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  validates :source_branch, presence: true
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  validates :target_project, presence: true
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  validates :target_branch, presence: true
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  validate :validate_branches
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  validate :validate_fork
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  scope :of_group, ->(group) { where("source_project_id in (:group_project_ids) OR target_project_id in (:group_project_ids)", group_project_ids: group.project_ids) }
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  scope :by_branch, ->(branch_name) { where("(source_branch LIKE :branch) OR (target_branch LIKE :branch)", branch: branch_name) }
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  scope :cared, ->(user) { where('assignee_id = :user OR author_id = :user', user: user.id) }
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  scope :by_milestone, ->(milestone) { where(milestone_id: milestone) }
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  scope :in_projects, ->(project_ids) { where("source_project_id in (:project_ids) OR target_project_id in (:project_ids)", project_ids: project_ids) }
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  scope :of_projects, ->(ids) { where(target_project_id: ids) }
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  scope :merged, -> { with_state(:merged) }
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  scope :closed, -> { with_state(:closed) }
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  scope :closed_and_merged, -> { with_states(:closed, :merged) }
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  def self.reference_prefix
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    '!'
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  end
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  # Pattern used to extract `!123` merge request references from text
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  #
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  # This pattern supports cross-project references.
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  def self.reference_pattern
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    %r{
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      (#{Project.reference_pattern})?
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      #{Regexp.escape(reference_prefix)}(?<merge_request>\d+)
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    }x
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  end
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  def to_reference(from_project = nil)
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    reference = "#{self.class.reference_prefix}#{iid}"
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    if cross_project_reference?(from_project)
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      reference = project.to_reference + reference
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    end
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    reference
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  end
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  def validate_branches
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    if target_project == source_project && target_branch == source_branch
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      errors.add :branch_conflict, "You can not use same project/branch for source and target"
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    end
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    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.id).opened
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      similar_mrs = similar_mrs.where('id not in (?)', self.id) if self.id
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      if similar_mrs.any?
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        errors.add :validate_branches,
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                   "Cannot Create: This merge request already exists: #{
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                   similar_mrs.pluck(:title)
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                   }"
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      end
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    end
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  end
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  def validate_fork
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    return true unless target_project && source_project
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    if target_project == source_project
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      true
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    else
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      # If source and target projects are different
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      # we should check if source project is actually a fork of target project
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      if source_project.forked_from?(target_project)
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        true
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      else
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        errors.add :validate_fork,
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                   'Source project is not a fork of target project'
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      end
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    end
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  end
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  def update_merge_request_diff
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    if source_branch_changed? || target_branch_changed?
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      reload_code
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    end
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  end
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  def reload_code
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    if merge_request_diff && open?
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      merge_request_diff.reload_content
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    end
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  end
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  def check_if_can_be_merged
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    if Gitlab::Satellite::MergeAction.new(self.author, self).can_be_merged?
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      mark_as_mergeable
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    else
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      mark_as_unmergeable
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    end
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  end
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  def merge_event
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    self.target_project.events.where(target_id: self.id, target_type: "MergeRequest", action: Event::MERGED).last
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  end
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  def closed_event
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    self.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 automerge!(current_user, commit_message = nil)
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    return unless automergeable?
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    MergeRequests::AutoMergeService.
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      new(target_project, current_user).
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      execute(self, commit_message)
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  end
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  def remove_source_branch?
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    self.should_remove_source_branch && !self.source_project.root_ref?(self.source_branch) && !self.for_fork?
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  end
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  def open?
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    opened? || reopened?
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  end
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  def work_in_progress?
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    title =~ /\A\[?WIP\]?:? /i
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  end
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  def automergeable?
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    open? && !work_in_progress? && can_be_merged?
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  end
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  def automerge_status
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    if work_in_progress?
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      "work_in_progress"
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    else
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      merge_status_name
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    end
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  end
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  def mr_and_commit_notes
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    # Fetch comments only from last 100 commits
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    commits_for_notes_limit = 100
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    commit_ids = commits.last(commits_for_notes_limit).map(&:id)
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    Note.where(
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      "(project_id = :target_project_id AND noteable_type = 'MergeRequest' AND noteable_id = :mr_id) OR" +
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      "(project_id = :source_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,
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      target_project_id: target_project_id,
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      source_project_id: source_project_id
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    )
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  end
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  # Returns the raw diff for this merge request
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  #
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  # see "git diff"
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  def to_diff(current_user)
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    Gitlab::Satellite::MergeAction.new(current_user, self).diff_in_satellite
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  end
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  # Returns the commit as a series of email patches.
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  #
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  # see "git format-patch"
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  def to_patch(current_user)
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    Gitlab::Satellite::MergeAction.new(current_user, self).format_patch
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  end
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  def hook_attrs
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    attrs = {
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      source: source_project.hook_attrs,
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      target: target_project.hook_attrs,
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      last_commit: nil
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    }
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    unless last_commit.nil?
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      attrs.merge!(last_commit: last_commit.hook_attrs)
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    end
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    attributes.merge!(attrs)
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  end
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  def for_fork?
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    target_project != source_project
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  end
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  def project
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    target_project
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  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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      issues = commits.flat_map { |c| c.closes_issues(current_user) }
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      issues.push(*Gitlab::ClosingIssueExtractor.new(project, current_user).
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                  closed_by_message(description))
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      issues.uniq.sort_by(&:id)
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    else
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      []
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    end
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  end
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  def target_project_path
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    if target_project
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      target_project.path_with_namespace
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    else
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      "(removed)"
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    end
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  end
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  def source_project_path
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    if source_project
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      source_project.path_with_namespace
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    else
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      "(removed)"
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    end
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  end
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  def source_project_namespace
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    if source_project && source_project.namespace
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      source_project.namespace.path
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    else
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      "(removed)"
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    end
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  end
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  def target_project_namespace
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    if target_project && target_project.namespace
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      target_project.namespace.path
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    else
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      "(removed)"
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    end
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  end
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  def source_branch_exists?
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    return false unless self.source_project
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    self.source_project.repository.branch_names.include?(self.source_branch)
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  end
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  def target_branch_exists?
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    return false unless self.target_project
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    self.target_project.repository.branch_names.include?(self.target_branch)
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  end
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  # Reset merge request events cache
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  #
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  # Since we do cache @event we need to reset cache in special cases:
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  # * when a merge request is updated
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  # Events cache stored like  events/23-20130109142513.
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  # The cache key includes updated_at timestamp.
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  # Thus it will automatically generate a new fragment
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  # when the event is updated because the key changes.
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  def reset_events_cache
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    Event.reset_event_cache_for(self)
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  end
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  def merge_commit_message
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    message = "Merge branch '#{source_branch}' into '#{target_branch}'"
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    message << "\n\n"
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    message << title.to_s
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    message << "\n\n"
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    message << description.to_s
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    message << "\n\n"
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    message << "See merge request !#{iid}"
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    message
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  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
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    if target_project.nil?
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      []
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    else
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      target_project.repository.branch_names
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    end
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  end
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  # Return array of possible source branches
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  # depends on source project of MR
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  def source_branches
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    if source_project.nil?
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      []
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    else
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      source_project.repository.branch_names
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    end
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  end
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  def locked_long_ago?
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    return false unless locked?
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    locked_at.nil? || locked_at < (Time.now - 1.day)
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  end
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  def has_ci?
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    source_project.ci_service && commits.any?
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  end
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  def branch_missing?
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    !source_branch_exists? || !target_branch_exists?
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  end
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  def can_be_merged_by?(user)
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    ::Gitlab::GitAccess.new(user, project).can_push_to_branch?(target_branch)
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  end
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  def state_human_name
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    if merged?
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      "Merged"
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    elsif closed?
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      "Closed"
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    else
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      "Open"
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    end
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  end
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end
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