mastodon set up with Rails Generator

class MastodonSetUpGenerator < Rails::Generators::Base
  desc "Set up Mastodon at once."

  class_option :redis_host, type: :string, default: "localhost", desc: "Path for redis server"
  class_option :redis_port, type: :numeric, default: 6379, desc: "Port for redis server"
  class_option :redis_password, type: :string, default: "" , desc: "redis password"
  class_option :redis_db, type: :numeric, default: 0, desc: "redis db path"
  class_option :redis_url, type: :string, aliases: "-R", desc: "Set redis options like redis://password@host:port/path"
  class_option :db_host, type: :string, default: "/var/run/postgresql", desc: "ip address or Unix domain socket path for PostgreSQL"
  class_option :db_user, type: :string, default: "mastodon", desc: "PostgreSQL user"
  class_option :db_pass, type: :string, default: "", desc: "PostgreSQL password"
  class_option :db_name, type: :string, default: "mastodon_production", desc: "PostgreSQL database name"
  class_option :db_port, type: :numeric, default: 5432, desc: "PostgresQL port"
  class_option :database_url, type: :string, aliases: "-Q", desc: "Set Postgresql options like postgresql://user:password@host/path"
  class_option :local_domain, type: :string, aliases: "-d", required: true, desc: "Set local domain for mastodon"
  class_option :local_https, type: :boolean, default: true
  class_option :web_domain, type: :string, desc: "DO NOT USE THIS UNLESS YOU KNOW EXACTLY WHAT YOU ARE DOING"
  class_option :alternate_domains, type: :array, desc: "An array for alternative domains"
  class_option :single_user_mode, type: :boolean, default: false, desc: "Single user mode will disable registrations and redirect frontpage to the first profile"
  class_option :email_domain_blacklist, type: :array, desc: "Prevent registrations with following e-mail domains"
  class_option :email_domain_whitelist, type: :array, desc: "Only allow registrations with the following e-mail domains"
  class_option :default_locale, type: :string,aliases: "-l",  desc: "Optionally change default language"
  class_option :smtp_server, type: :string, desc: "E-mail configuration"
  class_option :smtp_port, type: :numeric, default: 587
  class_option :smtp_login, type: :string, desc: "Username for e-mail"
  class_option :smtp_password, type: :string, desc: "Password for e-mail"
  class_option :smtp_from_address, type: :string, desc: "e-mail address for notification message,default is notification@local_domain"
  class_option :smtp_domain, type: :string, desc: "Do same as local_domain"
  class_option :smtp_delivery_method, type: :string, default: "smtp", desc: "smtp or sendmail"
  class_option :smtp_auth_method, type: :string, default: "plain"
  class_option :smpt_ca_file, type: :string, default: "/etc/ssl/certs/ca-certificates.crt"
  class_option :smtp_openssl_verify_mode, type: :string, default: "peer"
  class_option :smtp_enable_starttls_auto, type: :boolean, default: true
  class_option :smtp_tls, type: :boolean, default: true
  class_option :smtp_url, type: :string, aliases: "-S", desc: "Set required SMTP configuration at once like smtp://user:pass@server:port"
  class_option :paperclip_root_path, type: :string, desc: "Optional user upload path"
  class_option :paperclip_root_url, type: :string, desc: "Optional user upload URL"
  class_option :certbot, type: :boolean, aliases: "--letsencrypt", default: true, desc: "If use Let's Encrypt for certificate." 
  class_option :update_certificate, type: :numeric, aliases: "-u", default: 7773333, desc: "Run Let's Encrypt certificate file update par seconds, specify 0 if update manually"
  class_option :ssl_certificate, type: :string, aliases: "--cert", desc: "Specify ssl certificate file when you use --no-certbot"
  class_option :ssl_privatekey, type: :string, aliases: "--key", desc: "Specify ssl private key file when you use --no-certbot"
  class_option :port, type: :hash, aliases: "-P", default: {web: 3000,streaming: 4000}, desc: "mastodon proxy ports"
  class_option :node_version, type: :numeric, aliases: "-J", default: 6, desc: "Node.js version to be installed"
  class_option :redis, type: :boolean, default: true, desc: "If install redis or not, please specify --redis-url or change configuration later" 
  class_option :postgresql, type: :boolean, default: true, desc: "If install PostgreSQL or not, please specify --database-url or change configuration later" 
  class_option :nginx, type: :boolean, default: true, desc: "If install Nginx or not"
  class_option :apache, type: :boolean, default: false, desc: "Use Apache Httpd instead of Nginx"
  class_option :pgbouncer, type: :boolean, default: false, desc: "Use PgBouncer for PostgreSQL"
  class_option :git, type: :boolean, default: true, desc: "Use git for installation"
  class_option :create_home, type: :boolean, default: true, desc: "Create home dir or not"
  class_option :install_dir, type: :string, default: "/var/mastodon", desc: "Select directory to install" 
  class_option :version, type: :string, default: "latest", desc: "Version to install"
  class_option :ruby_version, type: :string, default: "2.4.1", desc: "Version to install"
  class_option :use_ramdisk, type: :boolean, default: false, desc: "Use /dev/shm for mastodon"
  class_option :theme, type: :string, default: "dark", desc: "Mastodon theme color: dark or light"

  source_root File.expand_path('../templates', __FILE__)

  def SetUpPackage
    if RbConfig::CONFIG['host_os']!="linux-gnu"
      return 1
    end #if
    if File.exists?('/etc/lsb-release') || File.exists?('/etc/debian_version')
      p `sudo apt update&&sudo apt install -y curl sudo`
      unless (options[:node_version]==4 ||options[:node_version]==5 ||options[:node_version]==6 ||options[:node_version]==7 ||options[:node_version]==8)
        STDERR.puts "Incorrect version number is set."
        return 1
      end #unless
      unless (options[:nginx] || options[:apache]) 
        STDERR.puts "None of Web servers is selected.Please add configuratio by yourself."
      end #unless
      unless (options[:redis] || !options[:redis_url].empty?)
        STDERR.puts "Redis is not set.Please specify \"--redis\" or \"--redis_url=redis://password@host:port/path\"."
        return 1
      end #unless
      unless (options[:postgresql] || !options[:database_url].empty?)
        STDERR.puts "PostgreSQL is not set.Please specify \"--postgresql\" or \"--database_url=postgresql://user:password@host:port/path\"."
        return 1
      end #unless
      p `curl -sL https://deb.nodesource.com/setup_#{options[:node_version]}.x|sudo -E bash -`
      p <<`      EOS`
        sudo apt install -y curl
        curl -sS https://dl.yarnpkg.com/debian/pubkey.gpg |sudo apt-key add -
        echo "deb https://dl.yarnpkg.com/debian/ stable main" |sudo tee /etc/apt/sources.list.d/yarn.list
        sudo apt update && \
        sudo apt install-y  imagemagick ffmpeg libpq-dev libxml2-dev libxslt1-dev file libprotobuf-dev protobuf-compiler \
            pkg-config nodejs autoconf bison build-essential libssl-dev libyaml-dev libreadline6-dev libncurses5-dev libffi-dev \
            libgdbm-dev openssl certbot yarn libidn11-dev libicu-dev rbenv
        sudo apt clean
      EOS
      if options[:nginx]
        p `sudo apt install -y nginx`
      else if options[:apache]
        p `sudo apt install -y apache2`
        end #elif
      end #if
      ENV.store("version",options[:version])
      ENV.store("ruby_version",options[:ruby_version])
      ENV.store("install_dir",options[:install_dir])
      if options[:git]
        p <<`        EOS`
          sudo apt install -y git
          cd /tmp
          git clone https://github.com/rbenv/ruby-build.git ruby-build
          git clone https://github.com/tootsuite/mastodon.git live
          cd ./live
          if [ "$version" == "latest" ]
          then
            version=$(git tag -l | sort -V | tail -n 1)
          fi
          git checkout $version
        EOS
      else
        p <<`        EOS`
          sudo apt install -y unzip
          cd /tmp
          curl -s https://codeload.github.com/rbenv/ruby-build/zip/master -o ruby-build.zip 
          unzip -q ruby-build.zip -d ruby-build
          rm ruby-build.zip
          if [ $version == "latest" ]
          then
            version=$(curl -s https://github.com/tootsuite/mastodon/releases/latest|grep -o "v[0-9]\.[0-9]\.[0-9][a-z0-9]*")
          fi
          curl -s https://codeload.github.com/tootsuite/mastodon/zip/${version} -o live.zip
          unzip -q live.zip -d live
          rm live.zip
        EOS
      end #if
      if options[:create_home]
        p <<`        EOS`
        sudo adduser --group mastodon
        sudo -u mastodon mkdir -p /home/mastodon/.rbenv/plugins
        sudo -u  mastodon cp -r /tmp/ruby-build /home/mastodon/.rbenv/plugins/
        sudo -u mastodon rbenv install $ruby_version
        sudo -u mastodon rbenv global $ruby_version
        echo 'eval "$(rbenv init -)"'|sudo -u mastodon tee -a /home/mastodon/.bashrc
        EOS
      else
        p <<`        EOS`
        sudo adduser --system --no-create-home --group mastodon
        sudo mkdir -p /var/rbenv/plugins
        sudo cp -r /tmp/ruby-build /var/rbenv/plugins/
        export RBENV_ROOT=/var/rbenv
        export PATH="$RBENV_ROOT/bin:$PATH"
        eval "$(rbenv init -)"
        sudo rbenv install $ruby_version
        sudo rbenv global $ruby_version
        echo export RBENV_ROOT=/var/rbenv|sudo tee -a /etc/profile
        echo export PATH=\"\$RBENV_ROOT/bin:\$PATH\"|sudo tee -a /etc/profile
        echo eval \"\$(rbenv init -)\"|sudo tee sa /etc/profile
        #"
        EOS
      end #if
      #install mastodon
      p <<`      EOS`
        mkdir -p "$install_dir"&&cp -r /tmp/live/* "$install_dir"
        gem install bundler
        cd $install_dir
        bundle install --deployment --without development test
        yarn install --pure-lockfile
      EOS
    end #if Ubuntu or Debian
  end #SetUpPackage
end #class