mks.sh

#!/usr/bin/env bash
set -euo pipefail

#---Colors--------------
#-Reset
NC="\033[0m"

#-Basics
BLACK="\033[0;30m"
RED="\033[0;31m"
GREEN="\033[0;32m"
YELLOW="\033[0;33m"
BLUE="\033[0;34m"
MAGENTA="\033[0;35m"
CYAN="\033[0;36m"
WHITE="\033[0;37m"
#-----------------------

#---log commons--------
GOOD="${GREEN}[✓]${NC}"
WARNING="${YELLOW}[!]${NC}"
ERROR="${RED}[X]${NC}"
INFO="${BLUE}[*]${NC}"
#-----------------------

#---text decorations----
MARKER="◇"
MARKER2="○"
SUBTITLE="${YELLOW}${MARKER2}"
#-----------------------

#---system variables----
# working
NAME=""
ALT_PATH=""
OVERWRITE=false
TEMPLATE=""
TEMPLATE_FOUND=false


# static
STARTPATH="$(pwd)"
EDIT="${EDITOR:-nano}"
SCRIPT_DIR="$(cd "$(dirname "${BASH_SOURCE[0]}")" && pwd)"
#-----------------------

#---version------------
VERSION="1.0"
#----------------------

#---functions----------
show_help() {
printf "${YELLOW}███╗   ███╗██╗  ██╗███████╗ ██████╗██████╗ ██╗██████╗ ████████╗\n"
printf "${YELLOW}████╗ ████║██║ ██╔╝██╔════╝██╔════╝██╔══██╗██║██╔══██╗╚══██╔══╝\n"
printf "${YELLOW}██╔████╔██║█████╔╝ ███████╗██║     ██████╔╝██║██████╔╝   ██║\n"
printf "${YELLOW}██║╚██╔╝██║██╔═██╗ ╚════██║██║     ██╔══██╗██║██╔═══╝    ██║\n"
printf "${YELLOW}██║ ╚═╝ ██║██║  ██╗███████║╚██████╗██║  ██║██║██║        ██║\n"
printf "${YELLOW}╚═╝     ╚═╝╚═╝  ╚═╝╚══════╝ ╚═════╝╚═╝  ╚═╝╚═╝╚═╝        ╚═╝${NC}\n"
printf "${MARKER} mkscript v${VERSION}\n"
printf "\n${SUBTITLE} Features:${NC}\n"
printf "${MARKER} Auto-detects file extension\n"
printf "${MARKER} Grants execution permissions\n"
printf "${MARKER} Prevents overwriting existing files\n"
printf "${MARKER} Custom output paths\n"
printf "${MARKER} Custom template support\n"
printf "${MARKER} 2 pretyped templates: minimal, tool\n"
printf "${MARKER} Opens script in default editor\n"
printf "\n${SUBTITLE} Options:${NC}\n"
printf "  -o, --overwrite       Force overwrite of existing files\n"
printf "  -t, --template <name> Select template: empty, minimal, or tool\n"
printf "  -p, --path <dir>      Set output directory\n"
printf "\n${SUBTITLE} Display options:${NC}\n"
printf "  -l, --list      Show templates\n"
printf "  -h, --help      Show this help page\n"
printf "\n${SUBTITLE} Usage:${NC}\n"
printf "bash mks.sh <name> <options>\n"
printf "bash mks.sh <display option>\n"
printf "\n${SUBTITLE} Log examples:${NC}\n"
printf "${GOOD} good\n"
printf "${WARNING} warning\n"
printf "${ERROR} error\n"
printf "${INFO} information\n"
echo ""
}

generate() {
if [[ -z "$TEMPLATE" ]]; then
	echo '#!/usr/bin/env bash
set -euo pipefail' > "$NAME"
else
	cp "$SCRIPT_DIR/templates/$TEMPLATE" "$PWD/$NAME"
fi
chmod +x "$NAME"
printf "${GOOD} $NAME generated as $TEMPLATE\n"
"$EDIT" "$NAME"
exit 0
}

setup() {
#check path
if [[ -z "$ALT_PATH" ]]; then
printf "${INFO} Using current directory\n"
else
cd "$ALT_PATH"
printf "${INFO} Target directory: '$ALT_PATH'\n"
fi

#check file existence
if [[ -e "$NAME" ]]; then
	printf "${WARNING} Script '$NAME' already exists\n"
	if [[ "$OVERWRITE" == "true" ]]; then
		printf "${WARNING} Overwriting existing script: '$NAME'\n"
		generate
	else
		printf "${ERROR} Script exists and overwrite is disabled\n"
		exit 1
	fi
else
	generate
fi
}

#---checking arguments--
if [[ -z "${1:-}" ]]; then
printf "${ERROR} Not script name provided\n"
exit 1
fi

if [[ "$1" == "-h" || "$1" == "--help" ]]; then
printf "${GOOD} Displaying help page\n"
show_help
exit 0
fi

if [[ "$1" == "-l" || "$1" == "--list" ]]; then
printf "${GOOD} Displaying templates\n"
cd "$SCRIPT_DIR"/templates
ls
exit 0
fi

if [[ "$1" == -* ]]; then
printf  "${ERROR} Invalid name: cannot start with '-'\n"
exit 1
fi

if [[ ! "$1" =~ ^[a-zA-Z0-9._-]+$ ]]; then
	printf  "${ERROR} Invalid name: use only letters, numbers, ., _ or -\n"
	exit 1
fi

#---establishing name---
if [[ "$1" == *.sh ]]; then
NAME="${1}"
shift
printf "${INFO} Name: '$NAME'\n"
else
NAME="${1}.sh"
shift
printf "${WARNING} No extension detected\n"
printf "${INFO} Name: '$NAME'\n"
fi

#---workflow-----------

while [[ "$#" -gt 0 ]]; do
	case "$1" in
		"-o"|"--overwrite")
		OVERWRITE=true
		shift
		printf "${INFO} Overwrite enabled\n"
		;;
		"-p"|"--path")
		if [[ -z "${2:-}" ]]; then
			printf "${ERROR} Path argument missing\n"
			exit 1
		elif [[ -d "$2" ]]; then
			ALT_PATH="$2"
			shift 2
			printf "${INFO} Target directory: '$ALT_PATH'\n"
		else
			printf "${ERROR} Invalid path: '$2'\n"
			exit 1
		fi
		;;
		"-t"|"--template")
		if [[ -z "$2" ]]; then
			printf "${ERROR} Template name missing\n"
			exit 1
		else
			for f in "$SCRIPT_DIR"/templates/*; do
				if [[ -f "$f" ]]; then
					TEMPLATE_NAME=$(basename "$f")
					if [[ "$2" == "$TEMPLATE_NAME" ]]; then
						TEMPLATE="$TEMPLATE_NAME"
						printf "${INFO} Template selected: '$TEMPLATE'\n"
						shift 2
						TEMPLATE_FOUND=true
						break
					fi
				fi
			done

			if ! $TEMPLATE_FOUND ; then
				printf "${ERROR} Template not found: '$2'\n"
				exit 1
			fi
		fi
		;;
		*)
		printf "${ERROR} Invalid argument: '$1'\n"
		exit 1
		;;
	esac
done
setup
exit 0