90 lines
2.9 KiB
Ruby
90 lines
2.9 KiB
Ruby
require File.dirname(__FILE__) + '/options'
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module Rails
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module Generator
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module Scripts
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# Generator scripts handle command-line invocation. Each script
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# responds to an invoke! class method which handles option parsing
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# and generator invocation.
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class Base
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include Options
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default_options :collision => :ask, :quiet => false
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# Run the generator script. Takes an array of unparsed arguments
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# and a hash of parsed arguments, takes the generator as an option
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# or first remaining argument, and invokes the requested command.
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def run(args = [], runtime_options = {})
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begin
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parse!(args.dup, runtime_options)
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rescue OptionParser::InvalidOption => e
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# Don't cry, script. Generators want what you think is invalid.
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end
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# Generator name is the only required option.
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unless options[:generator]
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usage if args.empty?
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options[:generator] ||= args.shift
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end
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# Look up generator instance and invoke command on it.
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Rails::Generator::Base.instance(options[:generator], args, options).command(options[:command]).invoke!
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rescue => e
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puts e
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puts " #{e.backtrace.join("\n ")}\n" if options[:backtrace]
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raise SystemExit
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end
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protected
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# Override with your own script usage banner.
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def banner
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"Usage: #{$0} generator [options] [args]"
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end
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def usage_message
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usage = "\nInstalled Generators\n"
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Rails::Generator::Base.sources.inject([]) do |mem, source|
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# Using an association list instead of a hash to preserve order,
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# for esthetic reasons more than anything else.
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label = source.label.to_s.capitalize
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pair = mem.assoc(label)
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mem << (pair = [label, []]) if pair.nil?
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pair[1] |= source.names
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mem
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end.each do |label, names|
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usage << " #{label}: #{names.join(', ')}\n" unless names.empty?
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end
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usage << <<end_blurb
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More are available at http://wiki.rubyonrails.org/rails/pages/AvailableGenerators
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1. Download, for example, login_generator.zip
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2. Unzip to directory #{Dir.user_home}/.rails/generators/login
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to use the generator with all your Rails apps
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end_blurb
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if Object.const_defined?(:RAILS_ROOT)
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usage << <<end_blurb
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or to #{File.expand_path(RAILS_ROOT)}/lib/generators/login
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to use with this app only.
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end_blurb
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end
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usage << <<end_blurb
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3. Run generate with no arguments for usage information
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#{$0} login
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Generator gems are also available:
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1. gem search -r generator
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2. gem install login_generator
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3. #{$0} login
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end_blurb
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return usage
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end
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end # Base
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end
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end
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end
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