### Home Classes Methods

### In Files

- lib/ramaze/bin/runner.rb

### Methods

- ::commands_info
- ::run

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# Ramaze::Bin::Runner

Module used for running a particular command based on the specified command line arguments.

Usage:

    ramaze --help # Shows a help message
    ramaze -h     # Shows a help message as well
    ramaze -v     # Shows the version of Ramaze

    ramaze [COMMAND] # Runs [COMMAND]

@author Yorick Peterse @since 21-07-2011

### Constants

Banner

  String containing the banner of the main command.

Commands

  Hash containing all the available commands, their names and their classes.

### Public Class Methods

commands_info() click to toggle source

Generates an array of "rows" where each row contains the name and description of a command. The descriptions of all commands are aligned based on the length of the longest command name.

@author Yorick Peterse @since 21-07-2011 @return [Array]

    # File lib/ramaze/bin/runner.rb, line 115
    def self.commands_info
      cmds    = []
      longest = Commands.map { |name, klass| name.to_s }.sort[0].size

      Commands.each do |name, klass|
        name = name.to_s
        desc = ''

        # Try to extract the command description
        if klass.respond_to?(:const_defined?)            and klass.const_defined?(:Description)
          desc = klass.const_get(:Description)
        end

        # Align the description based on the length of the name
        while name.size <= longest do
          name += ' '
        end

        cmds.push(["#{name}    #{desc}"])
      end

      return cmds
    end

run(argv=ARGV) click to toggle source

Runs a particular command based on the specified array.

@example

    Ramaze::Bin::Runner.run(ARGV)
    Ramaze::Bin::Runner.run(['start', '--help'])

@author Yorick Peterse @since 21-07-2011 @param [Array] argv An array containing command line arguments, set to

    ARGV by default.

    # File lib/ramaze/bin/runner.rb, line 66
    def self.run(argv=ARGV)
      op = OptionParser.new do |opt|
        opt.banner         = Banner
        opt.summary_indent = '  '

        opt.separator "\nCommands:\n  #{commands_info.join("\n  ")}"

        # Show all the common options
        opt.separator "\nOptions:\n"

        # Show the version of Ramaze
        opt.on('-v', '--version', 'Shows the version of Ramaze') do
          puts Ramaze::VERSION
          exit
        end

        opt.on('-h', '--help', 'Shows this help message') do
          puts op
          exit
        end
      end

      op.order!(argv)

      # Show a help message if no command has been specified
      if !argv[0]
        puts op.to_s
        exit
      end

      cmd = argv.delete_at(0).to_sym

      if Commands.key?(cmd)
        cmd = Commands[cmd].new
        cmd.run(argv)
      else
        abort 'The specified command is invalid'
      end
    end

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