Exit on setup failure

[p3lim]

If a pkgmeta file is malformated yq in setup-packager.sh should fail (i.e. with set -eo pipefail) and not discard the error to /dev/null, to ease troubleshooting.

[nebularg]

mmm, i could add another block that just reads the file, ie

if ! yq "$pkgmeta_file" >/dev/null; then
    echo "Error! Malformed pkgmeta yaml."
    exit 1
fi

but it seems kind of awkward to add a validation step there. i think i'd rather have it in the packager itself

[p3lim]

was thinking:

if ! err=$(yq "$pkgmeta_file" 2>&1); then
    echo "Error! Malformed pkgmeta yaml: $err"
    exit 1
fi