Fix 463 and rename appimage (#481)

* Updated appimagetool download url

* Added version to appimage name to reflect README correctly

* fixed rpm file not being renamed after generation

Author: RedStoneMango

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

@@ -11,9 +11,8 @@
 import java.io.IOException;
 
 public class GenerateAppImage extends ArtifactGenerator<LinuxPackager> {
-	
-	private static final int IMAGETOOL_VERSION = 13;
-	private static final String IMAGETOOL_URL = "https://github.com/AppImage/AppImageKit/releases/download/" + IMAGETOOL_VERSION + "/appimagetool-%s.AppImage";
+
+	private static final String IMAGETOOL_URL = "https://github.com/AppImage/appimagetool/releases/download/continuous/appimagetool-%s.AppImage";
 
 	public GenerateAppImage() {
 		super("AppImage");
@@ -41,12 +40,13 @@ protected File doApply(LinuxPackager packager) throws Exception {
 		File appFolder = packager.getAppFolder();
 		File outputFolder = packager.getOutputDirectory();
 		String name = packager.getName();
+        String version = packager.getVersion();
 		File executable = packager.getExecutable();
 		File assetsFolder = packager.getAssetsFolder();
 		File iconFile = packager.getIconFile();
 
 		// output AppImage file
-		File appImage = new File(outputFolder, name + ".AppImage");
+		File appImage = new File(outputFolder, name + "_" + version + ".AppImage");
 
 		// AppDir folder
 		File appDir = new File(assetsFolder, "AppDir");

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

@@ -93,7 +93,7 @@ protected File doApply(LinuxPackager packager) throws Exception {
 		builder.build(outputDirectory);
 
 		// renames generated RPM file if created
-		String suffix = "-1." + arch + ".rpm";
+		String suffix = "-1." + getRpmArchString(arch) + ".rpm";
 		File originalRpm = new File(outputDirectory, name + "-" + version + suffix);
 		File rpm = null;
 		if (originalRpm.exists()) {
@@ -129,4 +129,10 @@ private void addDirectory(Builder builder, String parentPath, File directory, Li
 		}
 	}
 
+    private String getRpmArchString(Architecture arch) {
+        if (arch == null) return "null";
+
+        return arch.toString().toLowerCase(); // Without Locale to match the redline_rpm way of handling conversion
+    }
+
 }