CLI implementation of Set, using file for storage

set.sh

#!/usr/bin/env bash

STATEFILE=${STATEFILE:-retry.log}

# dependencies
for i in sort gsed grep echo
do command -v $i > /dev/null || (echo $i not found >&2 && exit 1)
done

prime() {
	printf '' > $STATEFILE
}

add() {
	if test $# -eq 0
	then
		sort --unique >> $STATEFILE
	else
		echo "$@" >> $STATEFILE
	fi
}

remove() {
	gsed --in-place "/${*//\//.}/d" $STATEFILE
}

has() {
	grep --quiet "${*//\//.}" $STATEFILE
}

getAll() {
	sort --unique $STATEFILE | grep -ve ^$ -ve ^#
}

case $1 in
	prime)  "$@" ;;
	add)    "$@" ;;
	remove) "$@" ;;
	has)    "$@" ;;
	getAll) "$@" ;;
esac