MavenWrapperDownloader.java (4942B)
1 /* 2 * Copyright 2007-present the original author or authors. 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * https://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 import java.net.*; 17 import java.io.*; 18 import java.nio.channels.*; 19 import java.util.Properties; 20 21 public class MavenWrapperDownloader { 22 23 private static final String WRAPPER_VERSION = "0.5.6"; 24 /** 25 * Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided. 26 */ 27 private static final String DEFAULT_DOWNLOAD_URL = "https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/" 28 + WRAPPER_VERSION + "/maven-wrapper-" + WRAPPER_VERSION + ".jar"; 29 30 /** 31 * Path to the maven-wrapper.properties file, which might contain a downloadUrl property to 32 * use instead of the default one. 33 */ 34 private static final String MAVEN_WRAPPER_PROPERTIES_PATH = 35 ".mvn/wrapper/maven-wrapper.properties"; 36 37 /** 38 * Path where the maven-wrapper.jar will be saved to. 39 */ 40 private static final String MAVEN_WRAPPER_JAR_PATH = 41 ".mvn/wrapper/maven-wrapper.jar"; 42 43 /** 44 * Name of the property which should be used to override the default download url for the wrapper. 45 */ 46 private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl"; 47 48 public static void main(String args[]) { 49 System.out.println("- Downloader started"); 50 File baseDirectory = new File(args[0]); 51 System.out.println("- Using base directory: " + baseDirectory.getAbsolutePath()); 52 53 // If the maven-wrapper.properties exists, read it and check if it contains a custom 54 // wrapperUrl parameter. 55 File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH); 56 String url = DEFAULT_DOWNLOAD_URL; 57 if(mavenWrapperPropertyFile.exists()) { 58 FileInputStream mavenWrapperPropertyFileInputStream = null; 59 try { 60 mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile); 61 Properties mavenWrapperProperties = new Properties(); 62 mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream); 63 url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url); 64 } catch (IOException e) { 65 System.out.println("- ERROR loading '" + MAVEN_WRAPPER_PROPERTIES_PATH + "'"); 66 } finally { 67 try { 68 if(mavenWrapperPropertyFileInputStream != null) { 69 mavenWrapperPropertyFileInputStream.close(); 70 } 71 } catch (IOException e) { 72 // Ignore ... 73 } 74 } 75 } 76 System.out.println("- Downloading from: " + url); 77 78 File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH); 79 if(!outputFile.getParentFile().exists()) { 80 if(!outputFile.getParentFile().mkdirs()) { 81 System.out.println( 82 "- ERROR creating output directory '" + outputFile.getParentFile().getAbsolutePath() + "'"); 83 } 84 } 85 System.out.println("- Downloading to: " + outputFile.getAbsolutePath()); 86 try { 87 downloadFileFromURL(url, outputFile); 88 System.out.println("Done"); 89 System.exit(0); 90 } catch (Throwable e) { 91 System.out.println("- Error downloading"); 92 e.printStackTrace(); 93 System.exit(1); 94 } 95 } 96 97 private static void downloadFileFromURL(String urlString, File destination) throws Exception { 98 if (System.getenv("MVNW_USERNAME") != null && System.getenv("MVNW_PASSWORD") != null) { 99 String username = System.getenv("MVNW_USERNAME"); 100 char[] password = System.getenv("MVNW_PASSWORD").toCharArray(); 101 Authenticator.setDefault(new Authenticator() { 102 @Override 103 protected PasswordAuthentication getPasswordAuthentication() { 104 return new PasswordAuthentication(username, password); 105 } 106 }); 107 } 108 URL website = new URL(urlString); 109 ReadableByteChannel rbc; 110 rbc = Channels.newChannel(website.openStream()); 111 FileOutputStream fos = new FileOutputStream(destination); 112 fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE); 113 fos.close(); 114 rbc.close(); 115 } 116 117 }