org.sonarsource.sonarlint.core.util.VersionUtils.java Source code

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Here is the source code for org.sonarsource.sonarlint.core.util.VersionUtils.java

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/*
 * SonarLint Core - Implementation
 * Copyright (C) 2009-2017 SonarSource SA
 * mailto:info AT sonarsource DOT com
 *
 * This program is free software; you can redistribute it and/or
 * modify it under the terms of the GNU Lesser General Public
 * License as published by the Free Software Foundation; either
 * version 3 of the License, or (at your option) any later version.
 *
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
 * Lesser General Public License for more details.
 *
 * You should have received a copy of the GNU Lesser General Public License
 * along with this program; if not, write to the Free Software Foundation,
 * Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
 */
package org.sonarsource.sonarlint.core.util;

import com.google.common.annotations.VisibleForTesting;
import com.google.common.io.Resources;
import java.io.IOException;
import java.net.URL;
import java.nio.charset.StandardCharsets;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
import javax.annotation.CheckForNull;

public class VersionUtils {
    private static final String VERSION_REGEX = ".*?(\\d+\\.\\d+(?:\\.\\d+)*).*";
    private static final Pattern JAR_VERSION_PATTERN = Pattern.compile(VERSION_REGEX);

    private VersionUtils() {
    }

    public static String getLibraryVersion() {
        String version;
        Package packageInfo = VersionUtils.class.getPackage();
        if (packageInfo != null && packageInfo.getImplementationVersion() != null) {
            version = packageInfo.getImplementationVersion();
        } else {
            version = getLibraryVersionFallback();
        }
        return version;
    }

    @VisibleForTesting
    static String getLibraryVersionFallback() {
        String version = "unknown";
        URL resource = VersionUtils.class.getResource("/sl_core_version.txt");
        if (resource != null) {
            try {
                version = Resources.toString(resource, StandardCharsets.UTF_8);
            } catch (IOException e) {
                return version;
            }
        }

        return version;
    }

    @CheckForNull
    public static String getJarVersion(String jarName) {
        Matcher matcher = JAR_VERSION_PATTERN.matcher(jarName);
        if (matcher.find()) {
            return matcher.group(1);
        }

        return null;
    }
}