io.fabric8.kubernetes.client.internal.KubeConfigUtils.java Source code

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Here is the source code for io.fabric8.kubernetes.client.internal.KubeConfigUtils.java

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/**
 * Copyright (C) 2015 Red Hat, Inc.
 *
 * 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
 *
 *         http://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 io.fabric8.kubernetes.client.internal;

import com.fasterxml.jackson.databind.ObjectMapper;
import com.fasterxml.jackson.dataformat.yaml.YAMLFactory;
import io.fabric8.kubernetes.api.model.AuthInfo;
import io.fabric8.kubernetes.api.model.Cluster;
import io.fabric8.kubernetes.api.model.Config;
import io.fabric8.kubernetes.api.model.Context;
import io.fabric8.kubernetes.api.model.NamedAuthInfo;
import io.fabric8.kubernetes.api.model.NamedCluster;
import io.fabric8.kubernetes.api.model.NamedContext;

import java.io.File;
import java.io.IOException;
import java.util.List;

/**
 * Helper class for working with the YAML config file thats located in
 * <code>~/.kube/config</code> which is updated when you use commands
 * like <code>osc login</code> and <code>osc project myproject</code>
 */
public class KubeConfigUtils {
    public static Config parseConfig(File file) throws IOException {
        ObjectMapper mapper = new ObjectMapper(new YAMLFactory());
        return mapper.readValue(file, Config.class);
    }

    /**
     * Returns the current context in the given config
     */
    public static Context getCurrentContext(Config config) {
        String contextName = config.getCurrentContext();
        if (contextName != null) {
            List<NamedContext> contexts = config.getContexts();
            if (contexts != null) {
                for (NamedContext context : contexts) {
                    if (contextName.equals(context.getName())) {
                        return context.getContext();
                    }
                }
            }
        }
        return null;
    }

    /**
     * Returns the current user token for the config and current context
     */
    public static String getUserToken(Config config, Context context) {
        AuthInfo authInfo = getUserAuthInfo(config, context);
        if (authInfo != null) {
            return authInfo.getToken();
        }
        return null;
    }

    /**
     * Returns the current {@link AuthInfo} for the current context and user
     */
    public static AuthInfo getUserAuthInfo(Config config, Context context) {
        AuthInfo authInfo = null;
        if (config != null && context != null) {
            String user = context.getUser();
            if (user != null) {
                List<NamedAuthInfo> users = config.getUsers();
                if (users != null) {
                    for (NamedAuthInfo namedAuthInfo : users) {
                        if (user.equals(namedAuthInfo.getName())) {
                            authInfo = namedAuthInfo.getUser();
                        }
                    }
                }
            }
        }
        return authInfo;
    }

    /**
     * Returns the current {@link Cluster} for the current context
     */
    public static Cluster getCluster(Config config, Context context) {
        Cluster cluster = null;
        if (config != null && context != null) {
            String clusterName = context.getCluster();
            if (clusterName != null) {
                List<NamedCluster> clusters = config.getClusters();
                if (clusters != null) {
                    for (NamedCluster namedCluster : clusters) {
                        if (clusterName.equals(namedCluster.getName())) {
                            cluster = namedCluster.getCluster();
                        }
                    }
                }
            }
        }
        return cluster;
    }
}