Module: JRubyEnginize::Script

Defined in:
lib/script.rb

Overview

Commandline code refactored to keep the executables lean.

Class Method Summary collapse

Class Method Details

.enginize ⇒ Object

Command line code for the "jruby-enginize" executable. Call with "--help" to learn more. Checks for running on JRuby and having the Google AppEngine SDK around and forwards work to JRubyEnginize::Generator.



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# File 'lib/script.rb', line 22

def self.enginize
  email = nil
  template = 'sinatra'
  path = nil

  prog = File.basename($0)

=begin
  # Check for running with JRuby: The whole generator makes no sense if not 
  # running with or at least for JRuby...

  begin
    java.lang.String
  rescue
    $stderr.puts "!!#{prog} makes only sense on JRuby systems. Please try again." 
    exit(1)
  end
=end

  # The AppEngine SDK has to be around, too.

  begin
    raise ArgumentError if not File.stat(`which appcfg.sh`.chop).executable?
  rescue Exception
    $stderr.puts "!!AppEngine SDK missing. Please retry after installing." 
    exit(2)
  end

  options = { :name => nil, :dryrun => false }

  OptionParser.new do |opt|
    opt.banner = "Usage: #{prog} [options] --email address dirname"

    opt.on('-e', '--email address', 'E-Mail address to publish app with') { |email| }
    opt.on('-t', '--template name', "Name of the template (defaults to #{template})") { |template| }
    opt.on('-n', '--name appname', 'Name of the app (defaults to dir basename)') { |name|
      options[:name] = name }
    opt.on('-d', '--dry', 'Test run not really creating files') {
      options[:dryrun] = true }
    opt.on('-T', '--templates', 'List available templates') {
      puts 'Supported templates:'
      JRubyEnginize::Generator.templates.each { |name| puts "  #{name}" }
      exit(0) }

    begin
      opt.parse!(ARGV)

      raise 'missing directory name' if (path = ARGV.first).nil? or path.empty?
      raise 'directory already exists' if FileTest.exists? path
      raise 'unknown template' if not JRubyEnginize::Generator.templates.include? template
      
      raise 'missing e-mail address' if email.nil? or email.empty?
    rescue SystemExit
      exit(1)
    rescue Exception => exception
      $stderr.puts "!!#{exception}\n\n"

      opt.parse!(['--help'])

      exit(3)
    end
  end
  
  JRubyEnginize::Generator.new(email, path, template, options).run
end