Added a remove option, a one liner to install tlauncher-arch, and formatted some files

install.sh

@@ -1,31 +1,33 @@
-#!/bin/bash
+#!/usr/bin/env bash
+
+[[ "$(whoami)" = "root" ]] && echo "Script must be run as a normal user." && exit
+
+# Colors
+GREEN="\033[1;32m"
+END="\033[0m"
 
 ## wget is for downloading TLuncher directly from their website.
 ## All the other packages are java packages recommended by TLauncher
 ## (They use java 8, but instead i'm installing the most recent java version).
-pkgs_needed=(
+# Downloading packages
+pkgs=(
 	wget
 	jdk-openjdk
 	jre-openjdk
 	jre-openjdk-headless
 	java-openjfx
 )
-
-for pkg in ${pkgs_needed[@]} ; do
-	if ( ! pacman -Qs | grep -q $pkg ) ; then
-		sudo pacman -S --noconfirm "$pkg"
-	fi
-done
+sudo pacman -S --noconfirm --needed "${pkgs[@]}"
 
 # Downloading TLauncher
-echo -e "\n\033[1;32mDownloading TLauncher...\033[0m"
+echo -e "\n${GREEN}Downloading TLauncher...${END}"
 
-sudo wget https://tlauncher.org/jar -P src/
+wget https://tlauncher.org/jar -P src/
 unzip src/jar -d src/tlauncher.d
 mv src/tlauncher.d/*.jar src/tlauncher.d/tlauncher.jar
 
 # Moving TLauncher files
-echo -e "\n\033[1;32mInstalling TLauncher...\033[0m"
+echo -e "\n${GREEN}Installing TLauncher...${END}"
 sudo mkdir /usr/share/tlauncher
 sudo mv src/tlauncher.d/* /usr/share/tlauncher
 
@@ -33,4 +35,4 @@ sudo mv src/tlauncher /usr/bin/
 sudo mv src/tlauncher.png /usr/share/icons
 sudo mv src/tlauncher.desktop /usr/share/applications
 
-echo -e "\n\033[1;32mInstallation Complete!\033[0m"
+echo -e "\n${GREEN}Installation Complete!${END}"