OptionParser#off

Add a functionality which remove options already added to OptionParser.

Installation

Add this line to your application's Gemfile:

gem 'optparse-off'

And then execute:

$ bundle

Or install it yourself as:

$ gem install optparse-off

Usage

require 'optparse/off'

opts = OptionParser.new
opts.on '-n'
opts.off '-n'
opts.parse '-n' #=> invalid option: -n (OptionParser::InvalidOption)

Use case

Let you use a simple framework for command-line applications.

# command.rb
require 'optparse'

class Command
  def initialize
    @opts = OptionParser.new
    @opts.on '--dry-run' do |switch|
      @dry_run = switch
    end
  end

  def run
    @opts.parse!
  end
end

And then create a command to report something, offing `--dry-run' option:

# report.rb
require 'optparse/off'
require 'command'

# This class don't need `--dry-run' option
class Report < Command
  def initialize
    super

    # Add an additional option specified to this command
    @opts.on '--notifier=NOTIFIER', [:email, :irc, :and_so_on] do |notifier|
      @notifier = notifiler
    end

    # Off the `--dry-run' option
    @opts.off '--dry-run'
  end

  def run
    super
    # process reporting
  end
end

Contributing

1. Fork it
2. Create your feature branch (git checkout -b my-new-feature)
3. Commit your changes (git commit -am 'Add some feature')
4. Push to the branch (git push origin my-new-feature)
5. Create new Pull Request