Working script

ifelse(is_mounted("/system"), unmount("/system"));
mount("ext4", "EMMC", "/dev/block/mmcblk0p24", "/system", "");
package_extract_dir("system/addon.d", "/system/addon.d");
package_extract_file("system/bin/backuptool.sh", "/tmp/backuptool.sh");
package_extract_file("system/bin/backuptool.functions", "/tmp/backuptool.functions");
set_metadata("/tmp/backuptool.sh", "uid", 0, "gid", 0, "mode", 0755);
set_metadata("/tmp/backuptool.functions", "uid", 0, "gid", 0, "mode", 0644);
run_program("/tmp/backuptool.sh", "backup");
unmount("/system");
ui_print("=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-");
ui_print("     \ )        (          )\ ) )\ )          ");
ui_print("     (()/  (   ( )\     (  (()/((()/(         ");
ui_print("     (_)) ((_) (_)_)   /((_)(_)) (_))         ");
ui_print("     | |   (_) / _ \ (_))( |_ _| |   \        ");
ui_print("     | |__ | || (_) || || | | |  | |) |       ");
ui_print("     |____||_| \__\_\ \_,_||___| |___/        ");
ui_print("=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-");
ui_print("          <%%% Liquid-lollipop %%%>           ");
ui_print("          <%%% By LiquidSmooth %%%>           ");
ui_print("=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-");
ui_print(" ");
if is_mounted("/data") then
package_extract_file("system/bin/otasigcheck.sh", "/tmp/otasigcheck.sh");
package_extract_file("META-INF/org/slimroms/releasekey", "/tmp/releasekey");
set_metadata("/tmp/otasigcheck.sh", "uid", 0, "gid", 0, "mode", 0755);
run_program("/tmp/otasigcheck.sh") == "0" || abort("Can't install this package on top of incompatible data. Please try another package or run a factory reset");
else
mount("ext4", "EMMC", "/dev/block/mmcblk0p25", "/data", "");
package_extract_file("system/bin/otasigcheck.sh", "/tmp/otasigcheck.sh");
package_extract_file("META-INF/org/slimroms/releasekey", "/tmp/releasekey");
set_metadata("/tmp/otasigcheck.sh", "uid", 0, "gid", 0, "mode", 0755);
run_program("/tmp/otasigcheck.sh") == "0" || abort("Can't install this package on top of incompatible data. Please try another package or run a factory reset");
unmount("/data");
endif;
show_progress(0.750000, 0);
ui_print("Patching system image unconditionally...");
block_image_update("/dev/block/mmcblk0p24", package_extract_file("system.transfer.list"), "system.new.dat", "system.patch.dat");
mount("ext4", "EMMC", "/dev/block/mmcblk0p24", "/system", "");
delete("/system/bin/otasigcheck.sh");
unmount("/system");
show_progress(0.020000, 10);
mount("ext4", "EMMC", "/dev/block/mmcblk0p24", "/system", "");
package_extract_dir("system/addon.d", "/system/addon.d");
package_extract_file("system/bin/backuptool.sh", "/tmp/backuptool.sh");
package_extract_file("system/bin/backuptool.functions", "/tmp/backuptool.functions");
set_metadata("/tmp/backuptool.sh", "uid", 0, "gid", 0, "mode", 0755);
set_metadata("/tmp/backuptool.functions", "uid", 0, "gid", 0, "mode", 0644);
run_program("/tmp/backuptool.sh", "restore");
delete("/system/bin/backuptool.sh");
delete("/system/bin/backuptool.functions");
unmount("/system");
ui_print("Flashing SuperSU...");
mount("ext4", "EMMC", "/dev/block/mmcblk0p24", "/system", "");
package_extract_dir("supersu", "/tmp/supersu");
run_program("/sbin/busybox", "unzip", "/tmp/supersu/supersu.zip", "META-INF/com/google/android/*", "-d", "/tmp/supersu");
run_program("/sbin/busybox", "sh", "/tmp/supersu/META-INF/com/google/android/update-binary", "dummy", "1", "/tmp/supersu/supersu.zip");
unmount("/system");
run_program("/sbin/busybox", "mount", "/data");
run_program("/sbin/busybox", "mount", "/system");
delete_recursive("/data/UKM");
run_program("/sbin/sh", "-c", "mv /system/UKM /data/");
run_program("/sbin/sh", "-c", "chmod -R 775 /data/UKM");
show_progress(0.050000, 5);
ui_print("Flashing Boot Image...");
package_extract_file("boot.img", "/dev/block/mmcblk0p8");
show_progress(0.200000, 10);