#!/usr/bin/env bash
set -o posix

i=5
src=$'#!/usr/bin/env bash\nset -o posix\n\ni=~\nsrc=$\'@\'\n\nescape_quine() {\n\tlocal char="$1" ref="$2"\n\tcase "$char" in\n\t\t$\'\\\\\')\tprintf -v "$ref" \'%s\' \'\\\\\' ;;\n\t\t$\'\\\'\')\tprintf -v "$ref" \'%s\' "\\\'" ;;\n\t\t$\'\\t\')\tprintf -v "$ref" \'%s\' \'\\t\' ;;\n\t\t$\'\\n\')\tprintf -v "$ref" \'%s\' \'\\n\' ;;\n\t\t*)\t\tprintf -v "$ref" \'%s\' "$char" ;;\n\tesac\n}\n\nrun_quine() {\n#   One comments must be present\n\toutput=\'\'\n\tfor (( k=0; k<${#src}; k++ )); do\n\t\tc="${src:k:1}"\n\t\tif [[ "$c" == $\'\\x40\' ]]; then\n\t\t\tfor (( j=0; j<${#src}; j++ )); do\n\t\t\t\tout=""\n\t\t\t\tescape_quine "${src:j:1}" out\n\t\t\t\toutput+="$out"\n\t\t\tdone\n\t\telif [[ "$c" == $\'\\x7e\' ]]; then\n\t\t\toutput+="$(( i - 1 ))"\n\t\telse\n\t\t\toutput+="$c"\n\t\tfi\n\tdone\n\tprintf \'%s\' "$output" > "Sully_$(( i - 1 )).sh"\n}\n\nif (( i - 1 < 0 )); then\n\texit 0\nfi\nrun_quine\n\nexec bash "Sully_$(( i - 1 )).sh"\n'

escape_quine() {
	local char="$1" ref="$2"
	case "$char" in
		$'\\')	printf -v "$ref" '%s' '\\' ;;
		$'\'')	printf -v "$ref" '%s' "\'" ;;
		$'\t')	printf -v "$ref" '%s' '\t' ;;
		$'\n')	printf -v "$ref" '%s' '\n' ;;
		*)		printf -v "$ref" '%s' "$char" ;;
	esac
}

run_quine() {
#   One comments must be present
	output=''
	for (( k=0; k<${#src}; k++ )); do
		c="${src:k:1}"
		if [[ "$c" == $'\x40' ]]; then
			for (( j=0; j<${#src}; j++ )); do
				out=""
				escape_quine "${src:j:1}" out
				output+="$out"
			done
		elif [[ "$c" == $'\x7e' ]]; then
			output+="$(( i - 1 ))"
		else
			output+="$c"
		fi
	done
	printf '%s' "$output" > "Sully_$(( i - 1 )).sh"
}

if (( i - 1 < 0 )); then
	exit 0
fi
run_quine

exec bash "Sully_$(( i - 1 )).sh"