Install devel/ncurses into a Poudriere jail, so ports can be built against it

poudriere-ncurses.sh

# Path to packages/xxx/All
PKGS=/usr/local/poudriere/data/packages/12amd64/All
# Name of ZFS pool containing Poudriere jail
ZPOOL=zpool
# Path to jail, without ZPOOL/ prefix
JAIL=poudriere/jails/12amd64

#
# End of customizable variables
#

ZJAIL=$ZPOOL/$JAIL

# Removes the temporary package directory in the jail,
# unmounting it first if necessary.
cleanup() {
    if test -n "${PKGDIR}"; then
        if test -f "${PKGDIR}"/pkg-*
        then umount "${PKGDIR}"
        fi
        rmdir "${PKGDIR}"
    fi
}

# Create and mount the jail's package directory JPKGDIR
if ! PKGDIR="$(mktemp -q -d /usr/local/$JAIL/packages.XXXXXX)"; then
    echo 'failed to create temporary directory' >&2
    exit 1
elif ! mount -t nullfs $PKGS $JPKGDIR; then
    echo 'could not mount package directory' >&2
    cleanup
    exit 1
fi

# Rollback to the "clean" snapshot and destroy it afterward
if ! zfs rollback $ZJAIL@clean; then
    echo 'rollback to snapshot failed' >&2
    cleanup
    exit 1
elif ! zfs destroy $ZJAIL@clean; then
    echo 'failed to destroy snapshot' >&2
    cleanup
    exit 1
fi

# Start the jail,
# install ports-mgmt/pkg and devel/ncurses,
# and kill the jail.
if ! jail -n $JAIL -c path=/usr/local/$JAIL persist; then
    echo 'unable to start jail' >&2
    cleanup
    exit 1
fi
pkg -j $JAIL add $PKGDIR/pkg-* $PKGDIR/ncurses-*
jail -r $JAIL

# Re-create the ZFS snapshot, so Poudriere will work.
zfs snap $ZJAIL@clean

cleanup