install

#!/bin/bash
# Installer script for elsni's linux environment
# (w) 2023 by Stephan Elsner

get_abs_filename() {
  # $1 : relative filename
  echo "$(cd "$(dirname "$1")" && pwd)/$(basename "$1")"
}

create_safelink() {
  if [[ -L "$HOME/$1" ]]; then     # check if dir is a symlink
    rm "$HOME/$1"
  else
    # no, rename old dir
    mv "$HOME/$1" "$HOME/$1_old" 2> /dev/null
  fi
  ## create a link to the config
  ln -s $(get_abs_filename "$2") "$HOME/$1"
}


install_dotfiles() {
  mkdir -p "${HOME}/.config"
  cd home/.config

  for d in */; do
    dir=${d::-1}  # remove ending slash
    create_safelink ".config/$dir" "$dir"
  done

  cd ..
  create_safelink ".bashrc" ".bashrc"
  create_safelink ".Xresources" ".Xresources"
  create_safelink ".Xdefaults" ".Xdefaults"
}

install_fira_font() {
  fonts_dir="${HOME}/.local/share/fonts"
  if [ ! -d "${fonts_dir}" ]; then
    mkdir -p "${fonts_dir}"
  fi
  echo "downloading Fira code..."
  version=5.2
  zip=Fira_Code_v${version}.zip
  curl --fail --location --show-error https://github.com/tonsky/FiraCode/releases/download/${version}/${zip} --output ${zip}
  unzip -o -q -d ${fonts_dir} ${zip}
  rm ${zip}
  echo "rebuilding font cache..."
  fc-cache -f
}

install_eza() {
  sudo apt install -y gpg wget
  sudo mkdir -p /etc/apt/keyrings
  if [ ! -f "/etc/apt/keyrings/gierens.gpg" ]; then
    wget -qO- https://raw.githubusercontent.com/eza-community/eza/main/deb.asc | sudo gpg --dearmor -o /etc/apt/keyrings/gierens.gpg
    echo "deb [signed-by=/etc/apt/keyrings/gierens.gpg] http://deb.gierens.de stable main" | sudo tee /etc/apt/sources.list.d/gierens.list
    sudo chmod 644 /etc/apt/keyrings/gierens.gpg /etc/apt/sources.list.d/gierens.list
  fi
  sudo apt update
  sudo apt install -y eza
}

install_lolcat() {
  olddir=`pwd`
  mkdir -p "${HOME}/source"
  cd "${HOME}/source"
  git clone https://github.com/jaseg/lolcat.git
  cd lolcat
  make && sudo make install
  cd ..
  #rm -rf lolcat
  cd $olddir
}

# ---------------------- main ------------------------------------------

case "$1" in
  "")
    echo "Install Elsni's linux environment for debian based systems"
    echo "usage: install <OPTION>"
    echo "where OPTION can be:"
    echo "-c   install dotfiles and dependencies for a console-only system (server)"
    echo "-g   install dependencies and dotfiles for a desktop (gui) system"
    echo "-a   install both, console and desktop stuff."
    echo "-d   install dotfiles only, don't install any dependencies"
    echo
    echo "IMPORTANT: -c -g -a only works on systems with apt package manager"
    echo "like debian, ubuntu, mint, bunsenlabs, dietpi ..."
    exit 0;;
  "-c")
    echo "installing console stuff..."
    sudo apt install build-essential neofetch toilet mc nano micro -y
    install_eza
    install_lolcat
    install_dotfiles
    exit 0;;
  "-g")
    echo "installing desktop stuff..."
    sudo apt install herbstluftwm polybar xterm xwallpaper fonts-noto fonts-noto-color-emoji fonts-font-awesome ssh-askpass rofi lxappearance -y
	sudo apt install alacritty -y
    install_fira_font
    install_dotfiles
    exit 0;;
  "-a")
    echo "installing everything..."
    sudo apt install build-essential xterm xwallpaper neofetch toilet mc nano micro herbstluftwm polybar fonts-noto fonts-noto-color-emoji fonts-font-awesome ssh-askpass rofi lxappearance -y
	sudo apt install alacritty -y
    install_fira_font
    install_eza
    install_lolcat
    install_dotfiles
    exit 0;;
  "-d")
    echo "installing dotfiles only..."
    install_dotfiles
    exit 0;;
  *)
    echo "wrong parameter"
    exit 1;;
esac