juplo.de Git - demos/testing/blob - .mvn/wrapper/MavenWrapperDownloader.java

   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 }