org.apache.maven.wrapper.MavenWrapperMain Maven / Gradle / Ivy

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Maven Wrapper Jar download, installs and launches installed target Maven distribution as part of Maven Wrapper scripts run.
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/*
 * Licensed to the Apache Software Foundation (ASF) under one
 * or more contributor license agreements.  See the NOTICE file
 * distributed with this work for additional information
 * regarding copyright ownership.  The ASF licenses this file
 * to you 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 org.apache.maven.wrapper;

import java.io.IOException;
import java.io.InputStream;
import java.net.URI;
import java.net.URISyntaxException;
import java.nio.file.Path;
import java.nio.file.Paths;
import java.util.Locale;
import java.util.Map;
import java.util.Objects;
import java.util.Properties;

import org.apache.maven.wrapper.cli.CommandLineParser;
import org.apache.maven.wrapper.cli.SystemPropertiesCommandLineConverter;

/**
 * Main entry point for the Maven Wrapper, delegating wrapper execution to {@link WrapperExecutor}.
 *
 * @author Hans Dockter
 */
public class MavenWrapperMain {
    private static final String POM_PROPERTIES =
            "/META-INF/maven/org.apache.maven.wrapper/maven-wrapper/pom.properties";

    private static final Path DEFAULT_MAVEN_USER_HOME =
            Paths.get(System.getProperty("user.home")).resolve(".m2");

    public static final String MAVEN_USER_HOME_PROPERTY_KEY = "maven.user.home";

    public static final String MAVEN_USER_HOME_ENV_KEY = "MAVEN_USER_HOME";

    public static final String MVNW_VERBOSE = "MVNW_VERBOSE";

    public static final String MVNW_USERNAME = "MVNW_USERNAME";

    public static final String MVNW_PASSWORD = "MVNW_PASSWORD";

    public static final String MVNW_REPOURL = "MVNW_REPOURL";

    public static void main(String[] args) throws Exception {
        Path wrapperJar = wrapperJar();
        Path propertiesFile = wrapperProperties(wrapperJar);
        Path rootDir = rootDir(wrapperJar);

        String wrapperVersion = wrapperVersion();
        Logger.info("Apache Maven Wrapper " + wrapperVersion);

        Properties systemProperties = System.getProperties();
        systemProperties.putAll(parseSystemPropertiesFromArgs(args));

        addSystemProperties(rootDir);

        WrapperExecutor wrapperExecutor = WrapperExecutor.forWrapperPropertiesFile(propertiesFile);
        wrapperExecutor.execute(
                args,
                new Installer(
                        new DefaultDownloader("mvnw", wrapperVersion),
                        new HashAlgorithmVerifier(),
                        new PathAssembler(mavenUserHome())),
                new BootstrapMainStarter());
    }

    private static Map parseSystemPropertiesFromArgs(String[] args) {
        SystemPropertiesCommandLineConverter converter = new SystemPropertiesCommandLineConverter();
        CommandLineParser commandLineParser = new CommandLineParser();
        converter.configure(commandLineParser);
        commandLineParser.allowUnknownOptions();
        return converter.convert(commandLineParser.parse(args));
    }

    private static void addSystemProperties(Path rootDir) {
        System.getProperties()
                .putAll(SystemPropertiesHandler.getSystemProperties(
                        mavenUserHome().resolve("maven.properties")));
        System.getProperties().putAll(SystemPropertiesHandler.getSystemProperties(rootDir.resolve("maven.properties")));
    }

    private static Path rootDir(Path wrapperJar) {
        return wrapperJar.getParent().getParent().getParent();
    }

    private static Path wrapperProperties(Path wrapperJar) {
        return wrapperJar.resolveSibling(wrapperJar.getFileName().toString().replaceFirst("\\.jar$", ".properties"));
    }

    private static Path wrapperJar() {
        URI location;
        try {
            location = MavenWrapperMain.class
                    .getProtectionDomain()
                    .getCodeSource()
                    .getLocation()
                    .toURI();
        } catch (URISyntaxException e) {
            throw new RuntimeException(e);
        }
        if (!"file".equals(location.getScheme())) {
            throw new RuntimeException(String.format(
                    Locale.ROOT, "Cannot determine classpath for wrapper Jar from codebase '%s'.", location));
        }
        return Paths.get(location);
    }

    static String wrapperVersion() {
        try (InputStream resourceAsStream = MavenWrapperMain.class.getResourceAsStream(POM_PROPERTIES)) {
            if (resourceAsStream == null) {
                throw new IllegalStateException(POM_PROPERTIES + " not found.");
            }
            Properties mavenProperties = new Properties();
            mavenProperties.load(resourceAsStream);
            String version = mavenProperties.getProperty("version");
            Objects.requireNonNull(version, "No version specified in " + POM_PROPERTIES);
            return version;
        } catch (IOException e) {
            throw new RuntimeException("Could not determine wrapper version.", e);
        }
    }

    private static Path mavenUserHome() {
        String mavenUserHome = System.getProperty(MAVEN_USER_HOME_PROPERTY_KEY);
        if (mavenUserHome == null) {
            mavenUserHome = System.getenv(MAVEN_USER_HOME_ENV_KEY);
        }

        return mavenUserHome == null ? DEFAULT_MAVEN_USER_HOME : Paths.get(mavenUserHome);
    }
}