Class: Avalanche::CLI::Command

Inherits:
Object
  • Object
show all
Defined in:
lib/avalanche/cli/command.rb

Instance Method Summary collapse

Constructor Details

#initialize(usage, options, handler) ⇒ Command

Returns a new instance of Command.



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# File 'lib/avalanche/cli/command.rb', line 4

def initialize(usage, options, handler)
  parts    = usage.split(/\s+/)
  @name    = parts.shift
  usage    = parts.join(" ")
  @handler = handler.to_proc
  @options = {}
  @opts    = OptionParser.new

  @opts.program_name = @name

  @opts.banner = "Usage: #{@name} #{usage}"

  options.each do |name, opts|
    @opts.on(*opts) do |v|
      @options[name] = v
    end
  end

  @opts.base.append("", nil, nil)
  @opts.base.append("Additional options:", nil, nil)

  @opts.on_tail("-h", "--help",  "Show this message")   { print_help   }
  @opts.on_tail("-d", "--debug", "Enable debug output") { enable_debug }
end

Instance Method Details

#run(argv) ⇒ Object 



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# File 'lib/avalanche/cli/command.rb', line 29

def run(argv)
  $0 = "#{@name} #{argv.join(" ")}"
  @handler.call(@options, @opts.permute!(argv))
rescue ArgumentError, OptionParser::InvalidOption => e
  @opts.warn(e.message)

  if @debug
    puts ""
    puts e.backtrace
    puts ""
  end

  print_help
rescue Interrupt
  exit 0
rescue => e
  if @debug
    puts ""
    puts e.backtrace
    puts ""
  end

  @opts.abort(e.message)
end

#to_proc ⇒ Object 



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# File 'lib/avalanche/cli/command.rb', line 54

def to_proc
  proc { |opts, args| run(args) }
end