insert_variable.sh

#!/bin/bash
# Default variables
name=""
value=""
type="export"
rename=""
delete_type="none"

# Options
. <(wget -qO- https://raw.githubusercontent.com/SecorD0/utils/main/colors.sh) --
option_value(){ echo "$1" | sed -e 's%^--[^=]*=%%g; s%^-[^=]*=%%g'; }
while test $# -gt 0; do
	case "$1" in
	-h|--help)
		. <(wget -qO- https://raw.githubusercontent.com/SecorD0/utils/main/logo.sh)
		echo
		echo -e "${C_LGn}Functionality${RES}: the script inserts variable or alias to ${C_LGn}$HOME/.bash_profile${RES}"
		echo
		echo -e "${C_LGn}Usage${RES}: script ${C_LGn}[OPTIONS]${RES}"
		echo
		echo -e "${C_LGn}Options${RES}:"
		echo -e "  -h,  --help           show the help page"
		echo -e "  -n,  --name NAME      variable or alias NAME (mandatory)"
		echo -e "  -v,  --value VALUE    variable or alias VALUE (leave blank for manual input)"
		echo -e "  -a,  --alias          inserting an alias"
		echo -e "  -r,  --rename NAME_2  rename NAME_2 to NAME"
		echo -e "  -d,  --delete         delete the first occurrence of a variable or alias by NAME"
		echo -e "  -da, --delete-all     delete all occurrences of a variable or alias by NAME"
		echo
		echo -e "You can use either \"=\" or \" \" as an option and value ${C_LGn}delimiter${RES}"
		echo
		echo -e "${C_LGn}Useful URLs${RES}:"
		echo -e "https://github.com/SecorD0/utils/blob/main/miscellaneous/insert_variable.sh - script URL"
		echo -e "https://t.me/letskynode — node Community"
		echo
		return 0 2>/dev/null; exit 0
		;;
	-n*|--name*)
		if ! grep -q "=" <<< "$1"; then shift; fi
		name=`option_value "$1"`
		shift
		;;
	-v*|--value*)
		if ! grep -q "=" <<< "$1"; then shift; fi
		value=`option_value "$1"`
		shift
		;;
	-a|--alias)
		type="alias"
		shift
		;;
	-r*|--rename*)
		if ! grep -q "=" <<< "$1"; then shift; fi
		rename=`option_value "$1"`
		shift
		;;
	-d|--delete)
		delete_type="delete"
		shift
		;;
	-da|--delete-all)
		delete_type="delete_all"
		shift
		;;
	*|--)
		break
		;;
	esac
done

# Functions
printf_n(){ printf "$1\n" "${@:2}"; }

# Actions
touch $HOME/.bash_profile
. $HOME/.bash_profile
if [ ! -n "$name" ]; then
	printf_n "${C_R}You didn't specify a name via${RES} -n ${C_R}option!${RES}"
	return 1 2>/dev/null; exit 1
fi
if [ "$delete_type" != "none" ]; then
	if [ "$delete_type" = "delete" ]; then
		sed -i "0,/ ${name}=/{/ ${name}=/d;}" $HOME/.bash_profile
	elif [ "$delete_type" = "delete_all" ]; then
		sed -i "/ ${name}=/d" $HOME/.bash_profile
	fi
	unset "$name"
	unalias "$name" 2>/dev/null
else
	if [ -n "$rename" ]; then
		sed -i "s%${rename}%${name}%" $HOME/.bash_profile
		unset "$rename"
		unalias "$rename" 2>/dev/null
		if [ ! -n "$value" ]; then
			. $HOME/.bash_profile
			return 0 2>/dev/null; exit 0
		fi
	fi
	if [ ! -n "$value" ]; then
		printf "${C_LGn}Enter the value:${RES} "
		read -r value
	fi
	if ! cat $HOME/.bash_profile | grep -q " ${name}="; then
		echo "${type} ${name}=\"${value}\"" >> $HOME/.bash_profile
	elif ! cat $HOME/.bash_profile | grep -qF "${name}=\"${value}\""; then
		sed -i "s%^.*${name}*=.*%${type} ${name}=\"${value}\"%" $HOME/.bash_profile
	fi
	variable=`cat $HOME/.bash_profile | grep -qF "${name}=\"${value}\""`
	if ! grep -q "${type}" <<< "$variable"; then
		sed -i "s%^.*${name}*=.*%${type} ${name}=\"${value}\"%" $HOME/.bash_profile
	fi
fi
sed -i '/^$/d' $HOME/.bash_profile
. $HOME/.bash_profile