app/services/ci/image_for_build_service.rb


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module Ci
  class ImageForBuildService
    def execute(project, opts)
      ref = opts[:ref]
      sha = opts[:sha] || ref_sha(project, ref)
      pipelines = project.pipelines.where(sha: sha)

      image_name = image_for_status(pipelines.latest_status(ref))
      image_path = Rails.root.join('public/ci', image_name)

      OpenStruct.new(path: image_path, name: image_name)
    end

    private

    def ref_sha(project, ref)
      project.commit(ref).try(:sha) if ref
    end

    def image_for_status(status)
      status ||= 'unknown'
      'build-' + status + ".svg"
    end
  end
end