Shell - Install programming language

install_languages.sh

#!/bin/bash

node_version=""
php_version=""
global_flag=false

while [[ "$#" -gt 0 ]]; do
  case $1 in
    --node=*) node_version="${1#*=}"; shift ;;
    --php=*) php_version="${1#*=}"; shift ;;
    --node) node_version="$2"; shift 2 ;;
    --php) php_version="$2"; shift 2 ;;
    --global) global_flag=true; shift ;;
    *) echo "Invalid parameter: $1" >&2; exit 1 ;;
  esac
done

main() {
  if [ "$(_get_debian_based_distros)" == "The system is not based on Debian" ]; then
    echo $(_get_debian_based_distros)
    exit 1
  fi

  _install_asdf
  _asdf_install_plugins

  _install_php_deps

  _asdf_install_languages
  _add_asdf_global

  exit 0
}

_get_debian_based_distros() {
  local str_is_debian="The system is based on Debian."

  if command -v apt-get >/dev/null; then
    echo $str_is_debian
  else
    if [ -f /etc/debian_version ]; then
      echo $str_is_debian
    else
      echo "The system is not based on Debian."
    fi
  fi
}

_install_asdf() {
  if !command -v git >/dev/null; then
    echo "Installing git..."
    sudo apt install git
    echo "Git installed."
  fi

  if !command -v curl >/dev/null; then
    echo "Installing curl..."
    sudo apt install curl
    echo "Curl installed."
  fi

  echo "Cloning asdf..."
  git clone https://github.com/asdf-vm/asdf.git ~/.asdf --branch v0.14.0

  echo "Adding asdf to .bashrc..."
  echo "Adding in other shells: https://asdf-vm.com/guide/getting-started.html#_3-install-asdf"
  echo "" >> ~/.bashrc
  echo ". $HOME/.asdf/asdf.sh" >> ~/.bashrc
}

_asdf_install_plugins() {
  if !command -v asdf >/dev/null; then
    echo "asdf is not installed."
    exit 1
  fi

  echo "Installing asdf plugins..."

  echo "Adding PHP plugin: https://github.com/asdf-community/asdf-php"
  asdf plugin add php https://github.com/asdf-community/asdf-php.git

  echo "Adding NodeJS plugin: https://github.com/asdf-vm/asdf-nodejs"
  asdf plugin add nodejs https://github.com/asdf-vm/asdf-nodejs.git
}

_install_php_deps() {
  sudo apt update

  echo "Installing PHP dependencies..."
  sudo apt install $(echo autoconf bison build-essential gettext libgd-dev libcurl4-openssl-dev libedit-dev libicu-dev libjpeg-dev libmysqlclient-dev libonig-dev libpng-dev libpq-dev libreadline-dev libsqlite3-dev libssl-dev libxml2-dev libzip-dev openssl pkg-config re2c zlib1g-dev | xargs)
  echo "PHP dependencies installed."
}

_asdf_install_languages() {
  if [[ -z "$php_version" || -z "$node_version" ]]; then
    echo "PHP version and NodeJs version are required."
    echo "Usage: ./install.sh --php=x.x --node=x.x.x"
    exit 1
  fi

  echo "ASDF install php: $php_version"
  asdf install php $php_version

  echo "ASDF install nodejs: $node_version"
  asdf install nodejs $node_version
}

_add_asdf_global() {
  if [ "$global_flag" == false ]; then
    return
  fi

  asdf global nodejs $node_version
  asdf global php $php_version
}

main