For scripts declaring ADDOND_VERSION=3 automatically mount
vendor, product, system_ext and others (when they're dedicated partitions).
Also expose the get_output_path() function to get the path to where
a file is mounted in case it lives in a dedicated partition.
ab exapmles:
get_output_path "system/product/priv-app/MyApp.apk" = "/postinstall/product/priv-app/MyApk.apk"
get_output_path "system/app/MySystemApp.apk" = "/postinstall/system/app/MySystemApp.apk"
a-only examples:
get_output_path "/mnt/system/system/product/priv-app/MyApp.apk" = "/mnt/system/system/product/priv-app/MyApp.apk"
******************************************************************
Instead of cycling all scripts for each stage, run
pre-backup -> backup -> post-backup in quick succession
(and likewise for restore), to ensure backwards compatibility
with scripts that wrongly assumed their environment not to
change between steps.
This is needed because we want to undo any mounting done for V3
scripts when executing V2 scripts. If a V2 script did mounting in
pre-restore and expected things to still be mounted in restore,
we would break their (yes incorrect) assumption.
Change-Id: I73fbad6f45824fed99e4482128769435348588f5
Using cp instead of mv during the restore step resulted in double the
amount of free space and inodes being used.
For example, a nano arm64 opengapps install uses around 500M. But during
a backup/restore process when the Updater is used, it temporarily uses
1G on the other slot. That causes failed updates on devices that
don't have that much free space on the system partition.
Change-Id: I57ba2e0f52d328d4ff91d47a3db45f47bb8402af
* A/B OTA devices wont run backuptools in recovery (because they don't
go in to recovery to do an OTA). In these cases let's use a modified
version to backup/restore from within android upon postinstall.
* Add backuptool_postinstall.sh which will be run prior to the normal
postinstall script in order to backup/restore via addon.d scripts.
* This needs to be done in such a manner because we need /postinstall
mounted rw instead of the ro with context= options which are used for
the normal postinstall (dexopt) script.
Change-Id: I51511870634dd1ec5388adafddb446f95cc5a950
