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| 1 | +/* |
| 2 | +Licensed to the Apache Software Foundation (ASF) under one |
| 3 | +or more contributor license agreements. See the NOTICE file |
| 4 | +distributed with this work for additional information |
| 5 | +regarding copyright ownership. The ASF licenses this file |
| 6 | +to you under the Apache License, Version 2.0 (the |
| 7 | +"License"); you may not use this file except in compliance |
| 8 | +with the License. You may obtain a copy of the License at |
| 9 | +
|
| 10 | + http://www.apache.org/licenses/LICENSE-2.0 |
| 11 | +
|
| 12 | +Unless required by applicable law or agreed to in writing, |
| 13 | +software distributed under the License is distributed on an |
| 14 | +"AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| 15 | +KIND, either express or implied. See the License for the |
| 16 | +specific language governing permissions and limitations |
| 17 | +under the License. |
| 18 | +*/ |
| 19 | + |
| 20 | +import java.net.*; |
| 21 | +import java.io.*; |
| 22 | +import java.nio.channels.*; |
| 23 | +import java.util.Properties; |
| 24 | + |
| 25 | +public class MavenWrapperDownloader { |
| 26 | + |
| 27 | + /** |
| 28 | + * Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided. |
| 29 | + */ |
| 30 | + private static final String DEFAULT_DOWNLOAD_URL = |
| 31 | + "https://repo.maven.apache.org/maven2/io/takari/maven-wrapper/0.4.2/maven-wrapper-0.4.2.jar"; |
| 32 | + |
| 33 | + /** |
| 34 | + * Path to the maven-wrapper.properties file, which might contain a downloadUrl property to |
| 35 | + * use instead of the default one. |
| 36 | + */ |
| 37 | + private static final String MAVEN_WRAPPER_PROPERTIES_PATH = |
| 38 | + ".mvn/wrapper/maven-wrapper.properties"; |
| 39 | + |
| 40 | + /** |
| 41 | + * Path where the maven-wrapper.jar will be saved to. |
| 42 | + */ |
| 43 | + private static final String MAVEN_WRAPPER_JAR_PATH = |
| 44 | + ".mvn/wrapper/maven-wrapper.jar"; |
| 45 | + |
| 46 | + /** |
| 47 | + * Name of the property which should be used to override the default download url for the wrapper. |
| 48 | + */ |
| 49 | + private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl"; |
| 50 | + |
| 51 | + public static void main(String args[]) { |
| 52 | + System.out.println("- Downloader started"); |
| 53 | + File baseDirectory = new File(args[0]); |
| 54 | + System.out.println("- Using base directory: " + baseDirectory.getAbsolutePath()); |
| 55 | + |
| 56 | + // If the maven-wrapper.properties exists, read it and check if it contains a custom |
| 57 | + // wrapperUrl parameter. |
| 58 | + File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH); |
| 59 | + String url = DEFAULT_DOWNLOAD_URL; |
| 60 | + if(mavenWrapperPropertyFile.exists()) { |
| 61 | + FileInputStream mavenWrapperPropertyFileInputStream = null; |
| 62 | + try { |
| 63 | + mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile); |
| 64 | + Properties mavenWrapperProperties = new Properties(); |
| 65 | + mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream); |
| 66 | + url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url); |
| 67 | + } catch (IOException e) { |
| 68 | + System.out.println("- ERROR loading '" + MAVEN_WRAPPER_PROPERTIES_PATH + "'"); |
| 69 | + } finally { |
| 70 | + try { |
| 71 | + if(mavenWrapperPropertyFileInputStream != null) { |
| 72 | + mavenWrapperPropertyFileInputStream.close(); |
| 73 | + } |
| 74 | + } catch (IOException e) { |
| 75 | + // Ignore ... |
| 76 | + } |
| 77 | + } |
| 78 | + } |
| 79 | + System.out.println("- Downloading from: : " + url); |
| 80 | + |
| 81 | + File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH); |
| 82 | + if(!outputFile.getParentFile().exists()) { |
| 83 | + if(!outputFile.getParentFile().mkdirs()) { |
| 84 | + System.out.println( |
| 85 | + "- ERROR creating output direcrory '" + outputFile.getParentFile().getAbsolutePath() + "'"); |
| 86 | + } |
| 87 | + } |
| 88 | + System.out.println("- Downloading to: " + outputFile.getAbsolutePath()); |
| 89 | + try { |
| 90 | + downloadFileFromURL(url, outputFile); |
| 91 | + System.out.println("Done"); |
| 92 | + System.exit(0); |
| 93 | + } catch (Throwable e) { |
| 94 | + System.out.println("- Error downloading"); |
| 95 | + e.printStackTrace(); |
| 96 | + System.exit(1); |
| 97 | + } |
| 98 | + } |
| 99 | + |
| 100 | + private static void downloadFileFromURL(String urlString, File destination) throws Exception { |
| 101 | + URL website = new URL(urlString); |
| 102 | + ReadableByteChannel rbc; |
| 103 | + rbc = Channels.newChannel(website.openStream()); |
| 104 | + FileOutputStream fos = new FileOutputStream(destination); |
| 105 | + fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE); |
| 106 | + fos.close(); |
| 107 | + rbc.close(); |
| 108 | + } |
| 109 | + |
| 110 | +} |
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