feat: Grace.sh

src/Grace.sh

@@ -0,0 +1,38 @@
+#!/usr/bin/env bash
+
+set -o posix
+
+src=$'#!/usr/bin/env bash\n\nset -o posix\n\nsrc=$\'@\'\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\n\tfor (( i=0; i<${#src}; i++ )); do\n\t\tc="${src:i:1}"\n\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\telse\n\t\t\toutput+="$c"\n\t\tfi\n\tdone\n\tprintf \'%s\' "$output" > "Grace_Kid.sh"\n}\n\nrun_quine\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 (( i=0; i<${#src}; i++ )); do
+		c="${src:i:1}"
+
+		if [[ "$c" == $'\x40' ]]; then
+			for (( j=0; j<${#src}; j++ )); do
+				out=""
+				escape_quine "${src:j:1}" out
+				output+="$out"
+			done
+		else
+			output+="$c"
+		fi
+	done
+	printf '%s' "$output" > "Grace_Kid.sh"
+}
+
+run_quine