more standalone TerranBASIC executable build files

buildapp/build_app_linux_arm.sh

@@ -0,0 +1,28 @@
+#!/bin/bash
+cd "${0%/*}"
+APPIMAGETOOL="appimagetool-x86_64.AppImage"
+SRCFILES="tbaslinux_arm"
+DESTDIR="TerranBASIC_linux.arm"
+RUNTIME="runtime-linux-arm"
+
+# Cleanup
+rm -rf $DESTDIR || true
+mkdir $DESTDIR
+
+# Prepare an application
+cp icns.png $DESTDIR/icns.png
+cp $SRCFILES/TerranBASIC.desktop $DESTDIR/
+cp $SRCFILES/AppRun $DESTDIR/AppRun
+chmod +x $DESTDIR/AppRun
+
+# Copy over a Java runtime
+cp -r "../out/$RUNTIME" $DESTDIR/
+
+# Copy over all the assets and a jarfile
+cp -r "../out/TerranBASIC.jar" $DESTDIR/
+
+# Pack everything to AppImage
+"./$APPIMAGETOOL" $DESTDIR "out/$DESTDIR.AppImage" || { echo 'Building AppImage failed' >&2; exit 1; }
+chmod +x "out/$DESTDIR.AppImage"
+rm -rf $DESTDIR || true
+echo "Build successful: $DESTDIR"