app/helpers/gitlab/compare_helper.rb


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module Gitlab
  module CompareHelper
    def create_mr_button?(from = params[:from], to = params[:to], project = @project)
      from.present? &&
        to.present? &&
        from != to &&
        project.merge_requests_enabled &&
        project.repository.branch_names.include?(from) &&
        project.repository.branch_names.include?(to)
    end

    def create_mr_path(from = params[:from], to = params[:to], project = @project)
      new_namespace_project_merge_request_path(
        project.namespace,
        project,
        merge_request: {
          source_branch: to,
          target_branch: from
        }
      )
    end
  end
end