115 lines
4.5 KiB
Java
115 lines
4.5 KiB
Java
/*
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Licensed to the Apache Software Foundation (ASF) under one
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or more contributor license agreements. See the NOTICE file
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distributed with this work for additional information
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regarding copyright ownership. The ASF licenses this file
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to you under the Apache License, Version 2.0 (the
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"License"); you may not use this file except in compliance
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with the License. You may obtain a copy of the License at
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https://www.apache.org/licenses/LICENSE-2.0
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Unless required by applicable law or agreed to in writing,
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software distributed under the License is distributed on an
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"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
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KIND, either express or implied. See the License for the
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specific language governing permissions and limitations
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under the License.
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*/
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import java.io.File;
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import java.io.FileInputStream;
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import java.io.FileOutputStream;
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import java.io.IOException;
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import java.net.URL;
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import java.nio.channels.Channels;
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import java.nio.channels.ReadableByteChannel;
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import java.util.Properties;
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public class MavenWrapperDownloader {
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/**
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* Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided.
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*/
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private static final String DEFAULT_DOWNLOAD_URL =
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"https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.4.2/maven-wrapper-0.4.2.jar";
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/**
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* Path to the maven-wrapper.properties file, which might contain a downloadUrl property to
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* use instead of the default one.
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*/
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private static final String MAVEN_WRAPPER_PROPERTIES_PATH =
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".mvn/wrapper/maven-wrapper.properties";
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/**
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* Path where the maven-wrapper.jar will be saved to.
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*/
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private static final String MAVEN_WRAPPER_JAR_PATH =
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".mvn/wrapper/maven-wrapper.jar";
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/**
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* Name of the property which should be used to override the default download url for the wrapper.
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*/
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private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl";
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public static void main(String args[]) {
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System.out.println("- Downloader started");
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File baseDirectory = new File(args[0]);
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System.out.println("- Using base directory: " + baseDirectory.getAbsolutePath());
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// If the maven-wrapper.properties exists, read it and check if it contains a custom
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// wrapperUrl parameter.
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File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH);
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String url = DEFAULT_DOWNLOAD_URL;
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if(mavenWrapperPropertyFile.exists()) {
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FileInputStream mavenWrapperPropertyFileInputStream = null;
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try {
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mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile);
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Properties mavenWrapperProperties = new Properties();
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mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream);
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url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url);
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} catch (IOException e) {
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System.out.println("- ERROR loading '" + MAVEN_WRAPPER_PROPERTIES_PATH + "'");
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} finally {
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try {
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if(mavenWrapperPropertyFileInputStream != null) {
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mavenWrapperPropertyFileInputStream.close();
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}
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} catch (IOException e) {
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// Ignore ...
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}
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}
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}
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System.out.println("- Downloading from: : " + url);
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File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH);
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if(!outputFile.getParentFile().exists()) {
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if(!outputFile.getParentFile().mkdirs()) {
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System.out.println(
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"- ERROR creating output direcrory '" + outputFile.getParentFile().getAbsolutePath() + "'");
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}
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}
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System.out.println("- Downloading to: " + outputFile.getAbsolutePath());
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try {
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downloadFileFromURL(url, outputFile);
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System.out.println("Done");
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System.exit(0);
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} catch (Throwable e) {
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System.out.println("- Error downloading");
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e.printStackTrace();
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System.exit(1);
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}
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}
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private static void downloadFileFromURL(String urlString, File destination) throws Exception {
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URL website = new URL(urlString);
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ReadableByteChannel rbc;
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rbc = Channels.newChannel(website.openStream());
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FileOutputStream fos = new FileOutputStream(destination);
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fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE);
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fos.close();
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rbc.close();
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}
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}
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