| import java.util.Properties; |
| |
| public class MavenWrapperDownloader { |
| |
| /** |
| * Default URL to download the maven-wrapper.jar from, if no 'downloadUrl' is provided. |
| */ |
| private static final String DEFAULT_DOWNLOAD_URL = |
| "https://repo1.maven.org/maven2/io/takari/maven-wrapper/0.5.3/maven-wrapper-0.5.3.jar"; |
| |
| /** |
| * Path to the maven-wrapper.properties file, which might contain a downloadUrl property to |
| * use instead of the default one. |
| */ |
| private static final String MAVEN_WRAPPER_PROPERTIES_PATH = |
| ".mvn/wrapper/maven-wrapper.properties"; |
| |
| /** |
| * Path where the maven-wrapper.jar will be saved to. |
| */ |
| private static final String MAVEN_WRAPPER_JAR_PATH = |
| ".mvn/wrapper/maven-wrapper.jar"; |
| |
| /** |
| * Name of the property which should be used to override the default download url for the wrapper. |
| */ |
| private static final String PROPERTY_NAME_WRAPPER_URL = "wrapperUrl"; |
| |
| public static void main(String args[]) { |
| File baseDirectory = new File(args[0]); |
| |
| // If the maven-wrapper.properties exists, read it and check if it contains a custom |
| // wrapperUrl parameter. |
| File mavenWrapperPropertyFile = new File(baseDirectory, MAVEN_WRAPPER_PROPERTIES_PATH); |
| String url = DEFAULT_DOWNLOAD_URL; |
| if (mavenWrapperPropertyFile.exists()) { |
| FileInputStream mavenWrapperPropertyFileInputStream = null; |
| try { |
| mavenWrapperPropertyFileInputStream = new FileInputStream(mavenWrapperPropertyFile); |
| Properties mavenWrapperProperties = new Properties(); |
| mavenWrapperProperties.load(mavenWrapperPropertyFileInputStream); |
| url = mavenWrapperProperties.getProperty(PROPERTY_NAME_WRAPPER_URL, url); |
| } catch (IOException e) { |
| } finally { |
| try { |
| if (mavenWrapperPropertyFileInputStream != null) { |
| mavenWrapperPropertyFileInputStream.close(); |
| } |
| } catch (IOException e) { |
| // Ignore ... |
| } |
| } |
| } |
| |
| File outputFile = new File(baseDirectory.getAbsolutePath(), MAVEN_WRAPPER_JAR_PATH); |
| if (!outputFile.getParentFile().exists()) { |
| if (!outputFile.getParentFile().mkdirs()) { |
| System.out.println( |
| "- ERROR creating output direcrory '" + outputFile.getParentFile().getAbsolutePath() |
| + "'"); |
| } |
| } |
| System.out.println("- Downloading to: " + outputFile.getAbsolutePath()); |
| try { |
| downloadFileFromURL(url, outputFile); |
| System.out.println("Done"); |
| System.exit(0); |
| } catch (Throwable e) { |
| System.out.println("- Error downloading"); |
| e.printStackTrace(); |
| System.exit(1); |
| } |
| } |
| |
| private static void downloadFileFromURL(String urlString, File destination) throws Exception { |
| URL website = new URL(urlString); |
| ReadableByteChannel rbc; |
| rbc = Channels.newChannel(website.openStream()); |
| FileOutputStream fos = new FileOutputStream(destination); |
| fos.getChannel().transferFrom(rbc, 0, Long.MAX_VALUE); |
| fos.close(); |
| rbc.close(); |
| } |
| |
| } |