#!/bin/sh

os="$(cat "${__global:?}"/explorer/os)"

case "$os" in
	alpine)
		:
	;;
	*)
		echo "This type has no implementation for $os. Aborting." >&2
		exit 1
	;;
esac

scriptname="dirbackup-$(dd if=/dev/random bs=1 count=16 | tr -dC '[:alnum:]')"

destination="$(cat "${__object:?}/parameter/destination")"
frequency="$(cat "${__object:?}/parameter/frequency")"
keep="$(cat "${__object:?}/parameter/keep")"
src="/${__object_id:?}"

srcstrip="$(basename "$src")"

__directory "$destination" --parents
__file "/etc/periodic/$frequency/$scriptname" \
	--mode 0755 \
	--source - <<- EOF
		#!/bin/sh
		tar -czpf "$destination/$srcstrip-\$(date -I).tar.gz" -C '$(dirname "$src")' '$srcstrip'
		find '$destination' -mtime '$keep' -exec rm {} \;
	EOF