Class: Ditto::Options

Inherits:
OpenStruct
  • Object
show all
Includes:
Singleton
Defined in:
lib/ditto/options.rb

Constant Summary collapse

DEFAULTS = 
{
	:connstring => ENV['DATABASE_URL'] || 'nodb://a/b',
	:modelpath  => '.',
	:debug	    => false,
	:droptables => false,
	:verbose    => 0,
	:loadpaths  => nil
}

Instance Method Summary collapse

Constructor Details

#initialize ⇒ Options

Returns a new instance of Options.



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# File 'lib/ditto/options.rb', line 17

def initialize
  super(DEFAULTS)
end

Instance Method Details

#parse(argv) ⇒ Object 



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# File 'lib/ditto/options.rb', line 21

def parse argv

  Ditto::Options::DEFAULTS.each do |k,v|
	self.send "#{k}=".to_s, v
  end

  OptionParser.new do |opts|
	opts.banner = "Usage: ditto [ options ] paths..."
	opts.separator "Paths will be searched for .ditto files (definitions) and .yaml files (data)"
	opts.on("-c STRING", "--connection", String, "Database connection string",
		"Defaults to environment variable DATABASE_URL",
		"Current default is #{DEFAULTS[:connstring]}") do |s|
	  self.connstring = s
	end
	opts.on("-m PATH", "--modelpath", String, "Path to load DataMapper models from (default #{DEFAULTS[:modelpath]})") do |m|
	  raise "Modelpath #{m} does not exist!" unless Dir.exist?(m)
	  self.modelpath = m
	end
	opts.on("-d", "--debug", "Debug") do |s|
	  self.debug = true
	end
	opts.on("-v", "--verbose", "Verbose (repeat for more)") do
	  self.verbose += 1
	end
	opts.on("--droptables", "Delete existing database tables!") do
	  self.droptables = true
	end
	opts.on("-?", "-h", "--help", "Show this message") do
	  puts opts
	  exit
	end
	begin
	  opts.parse!(argv)
	rescue OptionParser::ParseError => e
	  STDERR.puts e.message, "\n", opts
	  exit(-1)
	end
  end
  self.loadpaths = argv
  return self
end