blob: b901097f2db6e50097dc0b222204a88f8cea1609 [file] [log] [blame]
Matthias Andreas Benkard2ebeae12020-03-15 12:40:25 +01001/*
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 * http://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 */
16import java.net.*;
17import java.io.*;
18import java.nio.channels.*;
19import java.util.Properties;
20
21public 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}