merge_request_diff.rb 3.49 KB
Newer Older
1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126
require Rails.root.join("app/models/commit")

class MergeRequestDiff < ActiveRecord::Base
  # Prevent store of diff
  # if commits amount more then 200
  COMMITS_SAFE_SIZE = 200

  attr_reader :commits, :diffs

  belongs_to :merge_request

  attr_accessible :state, :st_commits, :st_diffs

  delegate :target_branch, :source_branch, to: :merge_request, prefix: nil

  state_machine :state, initial: :empty do
    state :collected
    state :timeout
    state :overflow_commits_safe_size
    state :overflow_diff_files_limit
    state :overflow_diff_lines_limit
  end

  serialize :st_commits
  serialize :st_diffs

  after_create :reload_content

  def reload_content
    reload_commits
    reload_diffs
  end

  def diffs
    @diffs ||= (load_diffs(st_diffs) || [])
  end

  def commits
    @commits ||= load_commits(st_commits || [])
  end

  def last_commit
    commits.first
  end

  def last_commit_short_sha
    @last_commit_short_sha ||= last_commit.sha[0..10]
  end

  private

  def dump_commits(commits)
    commits.map(&:to_hash)
  end

  def load_commits(array)
    array.map { |hash| Commit.new(Gitlab::Git::Commit.new(hash)) }
  end

  def dump_diffs(diffs)
    if diffs.respond_to?(:map)
      diffs.map(&:to_hash)
    end
  end

  def load_diffs(raw)
    if raw.respond_to?(:map)
      raw.map { |hash| Gitlab::Git::Diff.new(hash) }
    end
  end

  # Collect array of Git::Commit objects
  # between target and source branches
  def unmerged_commits
    commits = if merge_request.for_fork?
                Gitlab::Satellite::MergeAction.new(merge_request.author, merge_request).commits_between
              else
                repository.commits_between(target_branch, source_branch)
              end

    if commits.present?
      commits = Commit.decorate(commits).
        sort_by(&:created_at).
        reverse
    end

    commits
  end

  # Reload all commits related to current merge request from repo
  # and save it as array of hashes in st_commits db field
  def reload_commits
    commit_objects = unmerged_commits

    if commit_objects.present?
      self.st_commits = dump_commits(commit_objects)
    end

    save
  end

  # Reload diffs between branches related to current merge request from repo
  # and save it as array of hashes in st_diffs db field
  def reload_diffs
    new_diffs = []

    if commits.size.zero?
      self.state = :empty
    elsif commits.size > COMMITS_SAFE_SIZE
      self.state = :overflow_commits_safe_size
    else
      new_diffs = unmerged_diffs
    end

    if new_diffs.any?
      if new_diffs.size > Commit::DIFF_HARD_LIMIT_FILES
        self.state = :overflow_diff_files_limit
        new_diffs = []
      end

      if new_diffs.sum { |diff| diff.diff.lines.count } > Commit::DIFF_HARD_LIMIT_LINES
        self.state = :overflow_diff_lines_limit
        new_diffs = []
      end
    end

127 128 129 130
    if new_diffs.present?
      new_diffs = dump_commits(new_diffs)
      self.state = :collected
    end
131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146

    self.st_diffs = new_diffs
    self.save
  end

  # Collect array of Git::Diff objects
  # between target and source branches
  def unmerged_diffs
    diffs = if merge_request.for_fork?
              Gitlab::Satellite::MergeAction.new(merge_request.author, merge_request).diffs_between_satellite
            else
              Gitlab::Git::Diff.between(repository, source_branch, target_branch)
            end

    diffs ||= []
    diffs
147 148 149
  rescue Gitlab::Git::Diff::TimeoutError => ex
    self.state = :timeout
    diffs = []
150 151 152 153 154 155
  end

  def repository
    merge_request.target_project.repository
  end
end