This is error:
assert failed: write_raw_image("/tmp/boot.img"
E:Error in /sdcard/arthur_signed.zip
(status 7)
Installation aborted.
well your boot partition is a emmc mounted on /dev/block/mmcblk0p12 you will need to make a .sh that will allow it to mount that block into rw and overwrite the boot.img, once you can do that, you will get past the error status 7, if you hit an error status 6 try using autosign found on
Here
to resign the .zip file and you should be able to get past error 6
Progress! it flashed but its to quick and nothing stick! (probably because of how the updater-script is set up) Does take a while to boot up!
how about using this,
unmount("/system");
unmount("/data");
unmount("/cache");
show_progress(0.500000, 0);
format("ext4", "EMMC", "/dev/block/mmcblk0p15");
format("ext4", "EMMC", "/dev/block/mmcblk0p17");
format("ext4", "EMMC", "/dev/block/mmcblk0p18");
mount("ext4", "EMMC", "/dev/block/mmcblk0p15", "/system");
mount("ext4", "EMMC", "/dev/block/mmcblk0p17", "/cache");
delete_recursive("/system");
delete_recursive("/cache");
package_extract_dir("foldercontaintingsystemstuffinzip", "/system");
and see if this will help it stick.
Hope this gives you some ideas, if all that works please share the updater-script as i have friends that will work on a totally custom rom for this phone.