Allow additional jlink arguments

README.md

@@ -158,6 +158,7 @@ By default it will generate next artifacts in `${outputDirectory} ` folder:
 
 | Property                   | Mandatory          | Default value                                                                                                                                      | Description                                                                                                                                                                               |
 |----------------------------|--------------------|----------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
+| `additionalJlinkArgs`      | :x:                | `[]`                                                                                                                                               | Additional arguments appended to the `jlink` call when generating a customized JRE, e.g. `--include-locales=en,es` or `--compress=0`.                                                     |
 | `additionalModulePaths`    | :x:                | `[]`                                                                                                                                               | Additional module paths for `jdeps`.                                                                                                                                                      |
 | `additionalModules`        | :x:                | `[]`                                                                                                                                               | Additional modules to the ones identified by `jdeps` or the specified with `modules` property.                                                                                            |
 | `additionalResources`      | :x:                | `[]`                                                                                                                                               | Additional files and folders to include in the bundled app.                                                                                                                               |

src/main/java/io/github/javapackager/gradle/PackagePluginExtension.java

@@ -29,6 +29,7 @@ public PackagePluginExtension(Project project) {
 		super();
 		this.project = project;
 		this.platform = Platform.auto;
+		this.additionalJlinkArgs = new ArrayList<>();
 		this.additionalModules = new ArrayList<>();
 		this.additionalModulePaths = new ArrayList<>();
 		this.additionalResources = new ArrayList<>();

src/main/java/io/github/javapackager/gradle/PackageTask.java

@@ -549,6 +549,18 @@ public void setAdditionalModulePaths(List<File> additionalModulePaths) {
 		this.additionalModulePaths = additionalModulePaths;
 	}
 
+	@Input
+	@Optional
+	private List<String> additionalJlinkArgs;
+
+	public List<String> getAdditionalJlinkArgs() {
+		return additionalJlinkArgs;
+	}
+
+	public void setAdditionalJlinkArgs(List<String> additionalJlinkArgs) {
+		this.additionalJlinkArgs = additionalJlinkArgs;
+	}
+
 	@Input
 	@Optional
 	private List<FileAssociation> fileAssociations;
@@ -643,6 +655,7 @@ protected Packager createPackager() throws Exception {
 		return
 			(Packager) PackagerFactory
 				.createPackager(defaultIfNull(platform, extension.getPlatform()))
+					.additionalJlinkArgs(defaultIfNull(additionalJlinkArgs, extension.getAdditionalJlinkArgs()))
 					.additionalModules(defaultIfNull(additionalModules, extension.getAdditionalModules()))
 					.additionalModulePaths(defaultIfNull(additionalModulePaths, extension.getAdditionalModulePaths()))
 					.additionalResources(defaultIfNull(additionalResources, extension.getAdditionalResources()))

src/main/java/io/github/javapackager/maven/PackageMojo.java

@@ -309,6 +309,12 @@ public PackageMojo(BuildPluginManager pluginManager) {
 	@Parameter(property = "additionalModulePaths", required = false)
 	private List<File> additionalModulePaths;
 
+	/**
+	 * Additional arguments passed to jlink when generating a customized JRE
+	 */
+	@Parameter(property = "additionalJlinkArgs", required = false)
+	private List<String> additionalJlinkArgs;
+
 	/**
 	 * Packaging JDK
 	 */
@@ -353,6 +359,7 @@ public void execute() throws MojoExecutionException {
 			Packager packager = 
 				(Packager) PackagerFactory
 					.createPackager(platform)
+						.additionalJlinkArgs(additionalJlinkArgs)
 						.additionalModules(additionalModules)
 						.additionalModulePaths(additionalModulePaths)
 						.additionalResources(additionalResources)

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

@@ -49,6 +49,7 @@ protected File doApply(Packager packager) throws Exception {
 		List<String> requiredModules = packager.getModules();
 		List<String> additionalModules = packager.getAdditionalModules();
 		List<File> additionalModulePaths = packager.getAdditionalModulePaths();
+		List<String> additionalJlinkArgs = packager.getAdditionalJlinkArgs();
 		File currentJdk = packager.getPackagingJdk();
 
 		Logger.infoIndent("Bundling JRE ... with " + currentJdk);
@@ -167,7 +168,8 @@ protected File doApply(Packager packager) throws Exception {
 					"--no-man-pages", 
 					"--strip-debug",
 					"--release-info", releaseInfo, 
-					(jlinkVersion < 21 ? "--compress=2" : null)
+					(VersionUtils.getJavaMajorVersion() < 21 ? "--compress=2" : null),
+					additionalJlinkArgs
 				);
 
 			// sets execution permissions on executables in jre

src/main/java/io/github/javapackager/packagers/PackagerSettings.java

@@ -66,6 +66,7 @@ public class PackagerSettings {
 	protected String jreMinVersion;
 	protected Manifest manifest;
 	protected List<File> additionalModulePaths;
+	protected List<String> additionalJlinkArgs;
 	protected List<FileAssociation> fileAssociations;
 	protected File packagingJdk;
 	protected Scripts scripts;
@@ -408,6 +409,14 @@ public List<File> getAdditionalModulePaths() {
 		return additionalModulePaths;
 	}
 
+	/**
+	 * Get additional jlink arguments
+	 * @return Additional jlink arguments
+	 */
+	public List<String> getAdditionalJlinkArgs() {
+		return additionalJlinkArgs;
+	}
+
 	/**
 	 * Get file associations
 	 * @return File associations
@@ -867,6 +876,16 @@ public PackagerSettings additionalModulePaths(List<File> additionalModulePaths)
 		return this;
 	}
 
+	/**
+	 * Set additional jlink arguments
+	 * @param additionalJlinkArgs Additional jlink arguments list
+	 * @return Packager settings
+	 */
+	public PackagerSettings additionalJlinkArgs(List<String> additionalJlinkArgs) {
+		this.additionalJlinkArgs = additionalJlinkArgs;
+		return this;
+	}
+
 	/**
 	 * Set file associations
 	 * @param fileAssociations File associations list
@@ -943,7 +962,8 @@ public String toString() {
 				+ ", createZipball=" + createZipball + ", zipballName=" + zipballName + ", extra=" + extra
 				+ ", useResourcesAsWorkingDir=" + useResourcesAsWorkingDir + ", assetsDir=" + assetsDir+ ", classpath="
 				+ classpath	+ ", jreMinVersion=" + jreMinVersion + ", manifest=" + manifest + ", additionalModulePaths="
-				+ additionalModulePaths + ", fileAssociations=" + fileAssociations + ", packagingJdk=" + packagingJdk
+				+ additionalModulePaths + ", additionalJlinkArgs="
+				+ additionalJlinkArgs + ", fileAssociations=" + fileAssociations + ", packagingJdk=" + packagingJdk
 				+ ", scripts=" + scripts + ", arch=" + arch + ", templates=" + templates + "]";
 	}