Class: Ordu

Inherits:
OptionParser
  • Object
show all
Defined in:
lib/ordu.rb

Overview

block specified in the class definition).

Class Method Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options: nil, commands: nil, action: nil) ⇒ Ordu

Make a new Ordu instance. It will be set up with the options, commands and action specified in its class definition.



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# File 'lib/ordu.rb', line 23

def initialize(options: nil, commands: nil, action: nil)
  super()
  options ||= self.class.options
  commands ||= self.class.commands
  action ||= self.class.action
  options.each { |o| option!(*o) }
  commands.each { |c| command!(*c) }
  on_tail(command_summary) if command_summary
  @action = action
end

Class Method Details

.parse!(args) ⇒ Object

Parses a new instance. Note that this must be the top-level, since you can’t supply a name. This is convenient for starting the parser from scripts.



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# File 'lib/ordu.rb', line 56

def self.parse!(args)
  new.parse!(args)
end

Instance Method Details

#command_summary ⇒ Object

A string which summarizes the commands - shown in the help



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# File 'lib/ordu.rb', line 45

def command_summary
  return if commands.empty?
  w = commands.keys.map(&:length).max
  lines = ['Available commands:']
  lines += commands.map { |k, v| "    %-#{w}s     %s" % [k, v.desc] }
  lines.join("\n")
end

#parse!(args) ⇒ Object

Parse options in order, and call commands for non-option arguments (if the command exists). This is how programs are exected.



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# File 'lib/ordu.rb', line 36

def parse!(args)
  args = order!(args)
  unless args.empty?
    return commands[args.shift].parse!(args) if commands.key?(args.first)
  end
  run(*args)
end