install

#!/usr/bin/env bash

## Author  : Zim Muller
## Github  : @zim0369
## Reddit  : @zim0369

## Alacritty installer script

## ANSI Colors (FG & BG)
RED="$(printf '\033[31m')"  GREEN="$(printf '\033[32m')"  ORANGE="$(printf '\033[33m')"  BLUE="$(printf '\033[34m')"
MAGENTA="$(printf '\033[35m')"  CYAN="$(printf '\033[36m')"  WHITE="$(printf '\033[37m')" BLACK="$(printf '\033[30m')"
REDBG="$(printf '\033[41m')"  GREENBG="$(printf '\033[42m')"  ORANGEBG="$(printf '\033[43m')"  BLUEBG="$(printf '\033[44m')"
MAGENTABG="$(printf '\033[45m')"  CYANBG="$(printf '\033[46m')"  WHITEBG="$(printf '\033[47m')" BLACKBG="$(printf '\033[40m')"
DEFAULT_FG="$(printf '\033[39m')"  DEFAULT_BG="$(printf '\033[49m')"

## Directories
DIR="$(pwd)"
ALACRITTY_DIR="$HOME/.config/alacritty"

## Banner
banner () {
    clear
    echo "
    
    ${ORANGE}╭━━━┳━━━┳╮╱╱╭━━━╮
    ${ORANGE}┃╭━╮┃╭━━┫┃╱╱┃╭━╮┃
    ${ORANGE}┃┃╱╰┫╰━━┫┃╱╱┃┃╱┃┃
    ${ORANGE}┃┃╭━┫╭━━┫┃╱╭┫╰━╯┃
    ${ORANGE}┃╰┻━┃╰━━┫╰━╯┃╭━╮┃
    ${ORANGE}╰━━━┻━━━┻━━━┻╯╱╰╯
    ${ORANGE}☴ ${CYAN}T̼I̼L̼L̼ ̼I̼T̼'̼S̼ ̼G̼O̼N̼E̼ ${ORANGE}☴
    ${ORANGE}☴☴☴☴☴☴☴☴☴☴☴☴☴☴☴☴☴☴
    "
}

## Script Termination
exit_on_signal_SIGINT () {
    { printf "\n\n%s\n" "    ${BLUE}[${RED}*${BLUE}] ${RED}Script interrupted." 2>&1; echo; reset_color; }
    exit 0
}

exit_on_signal_SIGTERM () {
    { printf "\n\n%s\n" "    ${BLUE}[${RED}*${BLUE}] ${RED}Script terminated." 2>&1; echo; reset_color; }
    exit 0
}

trap exit_on_signal_SIGINT SIGINT
trap exit_on_signal_SIGTERM SIGTERM

## Reset terminal colors
reset_color() {
	tput sgr0   # reset attributes
	tput op     # reset color
    return
}

## Prerequisite
prerequisite() {
    dependencies=(alacritty git sed grep egrep find)
    for dependency in "${dependencies[@]}"; do
        type -p "$dependency" &>/dev/null || {
			banner
            { echo; echo "    ${BLUE}[${RED}!${BLUE}] ${RED}ERROR: Could not find ${MAGENTA}'${dependency}'${RED}, is it installed?" >&2; echo; }
            { reset_color; exit 1; }
        }
    done
}

## Check for previous installation
check_prev () {
	banner
	if [[ (-L /usr/local/bin/gela) || (-f /usr/local/bin/gela) ]]; then
		{ echo; echo "    ${BLUE}[${RED}!${BLUE}] ${MAGENTA}Gelacritty ${GREEN}is already installed."; }
		{ read -p "    ${BLUE}[${RED}?${BLUE}] ${ORANGE}Do you wish to update? (y/n): ${GREEN}"; echo; }
		if [[ "$REPLY" =~ ^[y/Y]$ ]]; then
			install_gelacritty
		else
			{ reset_color; exit; }
		fi
	else
		{ echo; install_gelacritty; }
	fi
}

## Install gelacritty
install_gelacritty () {
	echo "    ${BLUE}[${RED}*${BLUE}] ${ORANGE}Installing Gelacritty..."
	# Delete old files
	if [[ (-L /usr/local/bin/gela) && (-d /usr/local/share/gelacritty) ]]; then
		echo "    ${BLUE}[${RED}*${BLUE}] ${RED}Deleting files from previous installation..."${BLUE}
		{ printf "    "; sudo rm -r /usr/local/bin/gela /usr/local/share/gelacritty /usr/local/share/fonts/gelacritty; echo; }
	fi
	# Gelacritty config dir
	if [[ ! -d $ALACRITTY_DIR ]]; then
		mkdir $ALACRITTY_DIR
	fi
     
	if ! [ -s "${ALACRITTY_DIR}/alacritty.yml" ]; then
		echo "    ${BLUE}[${RED}*${BLUE}] ${RED}Cannot find alacritty configuration: '${ALACRITTY_DIR}/alacritty.yml'"${BLUE}
		printf '%s\n' "    ${BLUE}[${RED}*${BLUE}] ${RED}Creating one for you..."${BLUE}
        # sed -i -e 's|program: .*|program: '$SHELL'|g' $DIR/alacritty.yml
	    cp $DIR/alacritty.yml $ALACRITTY_DIR
	fi
     
	if ! grep --quiet 'gelacritty\.yml' "${ALACRITTY_DIR}/alacritty.yml"; then
		printf '%s\n' "    ${BLUE}[${RED}*${BLUE}] ${RED}Adding gelacritty import to alacritty config..."
		printf 'import:\n- %s' "${ALACRITTY_DIR}/gelacritty.yml" >> "${ALACRITTY_DIR}/alacritty.yml"
	fi
	
	# Copying files
	{ echo "    ${BLUE}[${RED}*${BLUE}] ${ORANGE}Copying files to '/usr/local/share' directory..."${BLUE}; }
	{ printf "    "; sudo mkdir /usr/local/share/gelacritty; sudo mkdir -p /usr/local/share/fonts/gelacritty; }
	{ sudo cp -r $DIR/colors $DIR/gela $DIR/alacritty.yml /usr/local/share/gelacritty/; sudo cp -r $DIR/fonts/* /usr/local/share/fonts/gelacritty/; }
	{ sudo chmod +x /usr/local/share/gelacritty/gela; sudo fc-cache; sudo ln -s /usr/local/share/gelacritty/gela /usr/local/bin/gela; }

	# Verify files 
	if [[ (-L /usr/local/bin/gela) && (-d /usr/local/share/gelacritty) ]]; then
		{ echo; echo "    ${BLUE}[${RED}*${BLUE}] ${GREEN}Successfully Installed."; }
		{ echo "    ${BLUE}[${RED}*${BLUE}] ${GREEN}Now You Can Run This Program By Just typing ${MAGENTA}gela${GREEN}."; echo; }
		{ reset_color; exit 0; }
	else
		{ echo "    ${BLUE}[${RED}!${BLUE}] ${RED}Error Occured."; echo; reset_color; exit 1; }
	fi
}

## Main
main () {
	prerequisite
	check_prev
}

main