- loops would fail only in LOS Recovery from direct mount .img and losetup .img+loop mount with, e.g. "mount: mounting /dev/block/loop0 on /apex/com.android.adbd failed: Invalid argument"
- this started ~LOS19, I believe, though I haven't tracked down the specific change yet
- confusing to diagnose, since it always works in recovery adb shell, until I realized there was a context difference: "su" for adb shell and "recovery" for zip flashes
- switch shell context temporarily to "su" to do apex mounts, then return to original context (currently only necessary for mounting loops)
- /dev/block/loop* nodes don't behave correctly in Lineage Recovery anymore (beginning ~ LOS19), not sure why, but mount and losetup can't use them
- bail out early so we don't slow the install to a crawl with the rapid mount failures
- only umount /metadata and /persist if not already mounted, as some recoveries have these always mounted
- combine into list of possibly pre-mounted partitions to umount
- look for .ak3-debugging file in /tmp /cache /metadata or /persist to allow debugging better on recoveries that only support sideload
- use /tmp for ak3-debug.tgz if sideloading, and fix .tgz compression when apex fails to mount
- fix duplicate kernel version (vertmp) entries from some kernels
- don't use head when grep -m1 will suffice
- fix some (bad) OEM prop files including entries twice, use last entry like live system
- attempt to mount other partitions whether determined as /system or /system_root
- /system_root by that point if mounted will actually be /system_root so no need for further checks
- add missing /system_ext entries to custom getprop and cleanup functions
- touch up a couple pesky minor things
- add global scope to replace_line and remove_line so they match replace_string, and can now work on all matches found in a file
- remove unnecessary slot swapping since this is already handled with $POSTINSTALL and FlashAfterUpdate addon.d-v2's setup
- add cache mounting into main functions
- rename slot function to bring in line with my other projects
- don't rely on props if possible: determine dynamic/logical partitions from /dev/block/mapper presence, and detect slots more robustly using props and cmdline as in AK3 Core
- fix opposite slot detection for pushing modules to system and/or vendor during addon.d-v2
- only do setup_env and restore_env when in recovery to prevent environment/mount issues post-install
- use busybox [ for simple integer test to ensure known numerical operator behavior
osm0sis