housekeep

#!/usr/bin/env bash

tags_dir=${TNU_TAG_DIR:-$HOME/tags}
store_dir=${TNU_STORE_DIR:-$HOME/store}
today=$store_dir/$(date -I)

err() {
	2>&1 printf 'an error occured: %s' "$1"
	exit 1
}

parseargs() {
	while [ $# -gt 0 ]
	do
		arg=$1
		case $arg in
			# handle options
			-s|--store-dir)
				store_dir=$2
				test -d "$store_dir" ||
					err "$arg must specify a valid directory"
				shift
				;;
			-t|--tags-dir)
				tags_dir=$2
				test -d "$tags_dir" ||
					err "$arg must specify a valid directory"
				shift
			  ;;
			# treat all other flags as basic switches and set a new variable
			# with the same name as the switch to the value of "true"
			# do this for both short and long options
			-?)
				opt="${arg:1}";
				printf -v "$opt" '%s' "true" 2> /dev/null ||
					err "Invalid switch: $arg" # printf will likely only fail if
																		 # $opt is an invalid variable name
				;;
			--*)
				opt="${arg:2}"
				printf -v "$opt" '%s' "true" 2> /dev/null ||
					err "Invalid switch: $arg"
				;;
		esac
		shift
	done
}

# flags
v=

parseargs "$@"

for dir in "$store_dir"/*
do
  if [[ $dir < $today ]]; then
  	[ "$v" ] && printf 'Removing write permisson from %s\n' "$dir" 
    chmod -w -R "$dir"
  fi
done

symlinks -cr "$tags_dir"