func listRoles(w http.ResponseWriter, r *http.Request, t auth.Token) error {
	if !(permission.Check(t, permission.PermRoleUpdate) ||
		permission.Check(t, permission.PermRoleUpdateAssign) ||
		permission.Check(t, permission.PermRoleUpdateDissociate) ||
		permission.Check(t, permission.PermRoleCreate) ||
		permission.Check(t, permission.PermRoleDelete)) {
		return permission.ErrUnauthorized
	}
	roles, err := permission.ListRoles()
	if err != nil {
		return err
	}
	b, err := json.Marshal(roles)
	if err != nil {
		return err
	}
	w.Header().Set("Content-Type", "application/json")
	_, err = w.Write(b)
	return err
}
func listRoles(w http.ResponseWriter, r *http.Request, t auth.Token) error {
	if !(permission.Check(t, permission.PermRoleUpdate) ||
		permission.Check(t, permission.PermRoleUpdateAssign) ||
		permission.Check(t, permission.PermRoleUpdateDissociate) ||
		permission.Check(t, permission.PermRoleCreate) ||
		permission.Check(t, permission.PermRoleDelete)) {
		return permission.ErrUnauthorized
	}
	roles, err := permission.ListRoles()
	if err != nil {
		return err
	}
	b, err := json.Marshal(roles)
	if err != nil {
		return err
	}
	w.Header().Set("Content-Type", "application/json")
	_, err = w.Write(b)
	return err
}
// title: role list
// path: /roles
// method: GET
// produce: application/json
// responses:
//   200: OK
//   401: Unauthorized