omit --compress=2 jlink param when java >= 21 (using default value --compress zip-6

Author: fvarrui

src/main/java/io/github/fvarrui/javapackager/packagers/BundleJre.java

@@ -21,6 +21,8 @@
  */
 public class BundleJre extends ArtifactGenerator<Packager> {
 
+	private static final String ALL_MODULES = "ALL-MODULE-PATH";
+	
 	public BundleJre() {
 		super("JRE");
 	}
@@ -135,7 +137,7 @@ protected File doApply(Packager packager) throws Exception {
 					"--no-header-files", 
 					"--no-man-pages", 
 					"--strip-debug", 
-					"--compress=2"
+					(VersionUtils.getJavaMajorVersion() < 21 ? "--compress=2" : null)
 				);
 
 			// sets execution permissions on executables in jre
@@ -195,15 +197,19 @@ protected String getRequiredModules(File packagingJdk, File libsFolder, boolean
 
 		List<String> modulesList;
 
-		if (customizedJre && defaultModules != null && !defaultModules.isEmpty()) {
+		if (!customizedJre) {
+			
+			return ALL_MODULES;
+			
+		} else if (defaultModules != null && !defaultModules.isEmpty()) {
 
 			modulesList = 
 				defaultModules
 					.stream()
 					.map(module -> module.trim())
 					.collect(Collectors.toList());
 
-		} else if (customizedJre && VersionUtils.getJavaMajorVersion() >= 13) { 
+		} else if (VersionUtils.getJavaMajorVersion() >= 13) { 
 
 			String modules = 
 				CommandUtils.execute(
@@ -224,7 +230,7 @@ protected String getRequiredModules(File packagingJdk, File libsFolder, boolean
 					.filter(module -> !module.isEmpty())
 					.collect(Collectors.toList());
 
-		} else if (customizedJre && VersionUtils.getJavaMajorVersion() >= 9) { 
+		} else if (VersionUtils.getJavaMajorVersion() >= 9) { 
 
 			String modules = 
 				CommandUtils.execute(
@@ -256,7 +262,7 @@ protected String getRequiredModules(File packagingJdk, File libsFolder, boolean
 
 		if (modulesList.isEmpty()) {
 			Logger.warn("It was not possible to determine the necessary modules. All modules will be included");
-			modulesList.add("ALL-MODULE-PATH");
+			modulesList.add(ALL_MODULES);
 		} else {
 			modulesList.addAll(additionalModules);			
 		}