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After the first dep is printed, `shift` is called to avoid the special
case where the first dep cannot have a comma prepended.  However,
if there are no deps for a package (seen early on in the aports main
repo in acf-jquery), $# is 0.  POSIX specifies that `shift` has two
options when the shift operand (1) is greater than $#:

- if non-interactive, it can exit the shell
- if it does not exit the shell, it must return a non-zero exit code

Since we run the shell with -e, the second case folds in to the first.

BusyBox ash does not implement this behaviour, but bash does when called
as /bin/sh or when the `posix` shopt is set.

and respect -q flag

Currently is hard to discover what abuild version was used on a build log.
This lack of information makes it hard to reproduce a buld failure.

This change simply adds the abuild version at all logs.

the set -e made script exit early

This is useful for debugging

The secfixes comment will be parsed and added to alpine-secdb. add
sanitycheck so we catch errors early.

if there are no controlling reminal getlogin() may return NULL. We use
getpwuid() to try figure out the username and verify that we actually
have a username before we set environment USER.

This patch is based on earlier work by Timo Teräs.

set our gid to root so apk commit hooks run with the same gid as when
running  "sudo apk add ..." from command line.

Due to fakeroot being very permissive with regards to file permissions,
some package testsuites that explicitly check for failing permission checks
will fail.

For those testsuites, give the APKBUILD the option to run the tests outside
of a fakeroot environment.