install.bash

#!/bin/bash 

# check if .bash already exists, backup
if [ -d "$HOME/.bash" ]; then
  while true; do
    read -p "Existing bash config found, do you wish to overwrite? Existing config will be stored in '$HOME/.bash.old' (Y/n) " yn
    case $yn in
        [Yy]* ) mv -f "$HOME/.bash" "$HOME/.bash.old"; break;;
        [Nn]* ) exit;;
        * ) echo "Please answer yes or no.";;
    esac
  done
fi

# check if .bashrc already exists, backup
if [ -f "$HOME/.bashrc" ]; then
  mv  "$HOME/.bashrc" "$HOME/.bashrc.old"
fi 

# clone new bash config 
git clone https://github.com/jswent/bash "$HOME/.bash"

# link bash config to .bashrc 
echo "Creating symlink $HOME/.bash/.bashrc -> $HOME/.bashrc"
ln -s "$HOME/.bash/.bashrc" "$HOME/.bashrc"

OS=""
VER=""

# get os name 
if [ -f /etc/os-release ]; then
  # freedesktop.org and systemd
  . /etc/os-release
  OS=$NAME
  VER=$VERSION_ID
elif type lsb_release >/dev/null 2>&1; then
    # linuxbase.org
    OS=$(lsb_release -si)
    VER=$(lsb_release -sr)
elif [ -f /etc/lsb-release ]; then
    # For some versions of Debian/Ubuntu without lsb_release command
    . /etc/lsb-release
    OS=$DISTRIB_ID
    VER=$DISTRIB_RELEASE
elif [ -f /etc/debian_version ]; then
    # Older Debian/Ubuntu/etc.
    OS=Debian
    VER=$(cat /etc/debian_version)
elif [ -f /etc/SuSe-release ]; then
    # Older SuSE/etc.
    ...
elif [ -f /etc/redhat-release ]; then
    # Older Red Hat, CentOS, etc.
    ...
else
    # Fall back to uname, e.g. "Linux <version>", also works for BSD, etc.
    OS=$(uname -s)
    VER=$(uname -r)
fi

install_program () {
  if [[ "$OS" == "Arch Linux" ]]; then
    sudo pacman -S  "$1"
  elif [[ "$OS" == "Ubuntu" ]]; then
    sudo apt install "$1"
  elif [[ "$OS" == "Darwin" ]]; then
    sudo brew install "$1"
  else
    echo "Failed to install $1, please install manually"
  fi 
}

# check if fzf is installed
if ! command -v fzf &> /dev/null; then
  while true; do
    read -p "[ERROR] fzf was not found on your system, would you like to install it? (Y/n) " yn
    case $yn in
        [Yy]* ) install_program "fzf"; break;;
        [Nn]* ) break;;
        * ) echo "Please answer yes or no.";;
    esac
  done
fi
  
# check if neofetch is installed 
if ! command -v neofetch &> /dev/null; then
  while true; do
    read -p "[ERROR] neofetch was not found on your system, would you like to install it? (Y/n) " yn
    case $yn in
        [Yy]* ) install_program "neofetch"; break;;
        [Nn]* ) break;;
        * ) echo "Please answer yes or no.";;
    esac
  done
fi 

# check if exa is installed 
if ! command -v exa &> /dev/null; then
  while true; do
    read -p "[ERROR] exa was not found on your system, would you like to install it? (Y/n) " yn
    case $yn in
        [Yy]* ) install_program "exa"; break;;
        [Nn]* ) break;;
        * ) echo "Please answer yes or no.";;
    esac
  done
fi