scope(path: '*namespace_id/:project_id',
      format: nil,
      constraints: { namespace_id: Gitlab::Regex.namespace_route_regex }) do
  scope(constraints: { project_id: Gitlab::Regex.project_git_route_regex }, module: :projects) do
    # Git HTTP clients ('git clone' etc.)
    scope(controller: :git_http) do
      get '/info/refs', action: :info_refs
      post '/git-upload-pack', action: :git_upload_pack
      post '/git-receive-pack', action: :git_receive_pack
    end

    # Git LFS API (metadata)
    scope(path: 'info/lfs/objects', controller: :lfs_api) do
      post :batch
      post '/', action: :deprecated
      get '/*oid', action: :deprecated
    end

    # GitLab LFS object storage
    scope(path: 'gitlab-lfs/objects/*oid', controller: :lfs_storage, constraints: { oid: /[a-f0-9]{64}/ }) do
      get '/', action: :download

      scope constraints: { size: /[0-9]+/ } do
        put '/*size/authorize', action: :upload_authorize
        put '/*size', action: :upload_finalize
      end
    end
  end

  # Redirect /group/project/info/refs to /group/project.git/info/refs
  scope(constraints: { project_id: Gitlab::Regex.project_route_regex }) do
    # Allow /info/refs, /info/refs?service=git-upload-pack, and
    # /info/refs?service=git-receive-pack, but nothing else.
    #
    git_http_handshake = lambda do |request|
      ProjectUrlConstrainer.new.matches?(request) &&
        (request.query_string.blank? ||
         request.query_string.match(/\Aservice=git-(upload|receive)-pack\z/))
    end

    ref_redirect = redirect do |params, request|
      path = "#{params[:namespace_id]}/#{params[:project_id]}.git/info/refs"
      path << "?#{request.query_string}" unless request.query_string.blank?
      path
    end

    get '/info/refs', constraints: git_http_handshake, to: ref_redirect
  end
end