/*
 * Copyright 2012-2020 the original author or authors.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      https://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package org.springframework.boot.buildpack.platform.build;

/**
 * Image pull policy.
 *
 * @author Andrey Shlykov
 * @since 2.4.0
 */
public enum PullPolicy {

	/**
	 * Always pull the image from the registry.
	 */
	ALWAYS,

	/**
	 * Never pull the image from the registry.
	 */
	NEVER,

	/**
	 * Pull the image from the registry only if it does not exist locally.
	 */
	IF_NOT_PRESENT

}
