Antigen Quick Installer

antigen_quick_install.sh

#!/bin/bash

ANTIGEN_HOME=$HOME/.antigen
ZSHRC_GIST=https://git.io/JYAnF   # Basic .zshrc for use with Antigen

if $(dpkg --list | grep zsh > /dev/null; echo $?) != 0; then
  echo "Installing ZSH..."
  if $USER = 'root'; then
    apt-get install zsh -y
  else
    sudo apt-get install zsh -y
  fi
else
  echo "ZSH Already Installed. Continuing..."
fi

mkdir -p $ANTIGEN_HOME
curl -L git.io/antigen > $ANTIGEN_HOME/antigen.zsh
curl -L $ZSHRC_GIST > $HOME/.zshrc

if $SHELL != '/bin/zsh'; then
  echo "Changing default shell to ZSH..."
  chsh -s /bin/zsh $USER
else
  echo "Default Shell is already ZSH."
fi

Run this by executing curl -L https://git.io/JGmre | bash.