com.spotify.google.cloud.pubsub.client.integration.Util.java Source code

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Here is the source code for com.spotify.google.cloud.pubsub.client.integration.Util.java

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/*
 * Copyright (c) 2011-2015 Spotify AB
 *
 * 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 com.spotify.google.cloud.pubsub.client.integration;

import com.google.common.base.Splitter;

import java.io.File;
import java.io.IOException;
import java.nio.file.Files;
import java.util.List;

import static com.google.common.base.CharMatcher.WHITESPACE;
import static java.lang.System.getProperty;

class Util {

    static final String TEST_NAME_PREFIX = "test-";

    private static File CONFIG_PATH = new File(getProperty("user.home"), ".config");
    private static File GCLOUD_CONFIG_PATH = new File(CONFIG_PATH, "gcloud");
    private static File PROPERTIES_PATH = new File(GCLOUD_CONFIG_PATH, "properties");

    private static String defaultProject = System.getenv("GOOGLE_CLOUD_PROJECT");

    static String defaultProject() {

        if (defaultProject != null) {
            return defaultProject;
        }

        // Try reading $HOME/.config/gcloud/properties

        final List<String> lines;
        try {
            lines = Files.readAllLines(PROPERTIES_PATH.toPath());
        } catch (IOException e) {
            throw new RuntimeException("failed to get default project");
        }

        defaultProject = lines.stream().filter(line -> line.contains("project")).findFirst()
                .map(line -> Splitter.on(WHITESPACE).splitToList(line))
                .map(tokens -> tokens.size() > 2 ? tokens.get(2) : "").orElse("");

        if (defaultProject == null) {
            throw new RuntimeException("failed to get default project");
        }

        return defaultProject;
    }
}