apk add with empty world file purges all packages
Issue: If /etc/apk/world is an empty file and "apk add" with no arguments is run, apk purges all installed packages including busybox and everything else that makes the system function.
This probably could be filed under the "don't do that" category but it was just something I noticed when experimenting with apk on an armel port. I created an x86_64 chroot and see the same behavior there also. Seems like there should be some base set of packages that apk should never purge? Not sure if that's true for all use cases of Alpine but I would think that this behavior is at least undesirable?