Module: Plist4r::Mixlib::CLI

Included in:
CLI
Defined in:
lib/plist4r/mixin/mixlib_cli.rb

Overview

Author:: Adam Jacob (<adam@opscode.com>)
Copyright:: Copyright (c) 2008 Opscode, Inc.
License:: Apache License, Version 2.0

Licensed under the Apache License, Version 2.0 (the "License");
you may not use this file except in compliance with the License.
You may obtain a copy of the License at

    http://www.apache.org/licenses/LICENSE-2.0

Unless required by applicable law or agreed to in writing, software
distributed under the License is distributed on an "AS IS" BASIS,
WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
See the License for the specific language governing permissions and
limitations under the License.

Defined Under Namespace

Modules: ClassMethods

Instance Attribute Summary collapse

Instance Method Summary collapse

Instance Attribute Details

Returns the value of attribute banner.



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# File 'lib/plist4r/mixin/mixlib_cli.rb', line 77

def banner
  @banner
end

#config ⇒ Object

Returns the value of attribute config.



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# File 'lib/plist4r/mixin/mixlib_cli.rb', line 77

def config
  @config
end

#opt_parser ⇒ Object

Returns the value of attribute opt_parser.



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# File 'lib/plist4r/mixin/mixlib_cli.rb', line 77

def opt_parser
  @opt_parser
end

#options ⇒ Object

Returns the value of attribute options.



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# File 'lib/plist4r/mixin/mixlib_cli.rb', line 77

def options
  @options
end

Instance Method Details

#build_option_arguments(opt_setting) ⇒ Object 



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# File 'lib/plist4r/mixin/mixlib_cli.rb', line 178

def build_option_arguments(opt_setting)      
  arguments = Array.new

  arguments << opt_setting[:short] if opt_setting.has_key?(:short)
  arguments << opt_setting[:long] if opt_setting.has_key?(:long)

  if opt_setting.has_key?(:description)
    description = opt_setting[:description]
    description << " (required)" if opt_setting[:required]
    arguments << description
  end
    
  arguments
end

#initialize(*args) ⇒ Object

Create a new Mixlib::CLI class. If you override this, make sure you call super!

Parameters

*args<Array>

The array of arguments passed to the initializer

Returns

object<Mixlib::Config>

Returns an instance of whatever you wanted :)



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# File 'lib/plist4r/mixin/mixlib_cli.rb', line 86

def initialize(*args)
  @options = Hash.new
  @config  = Hash.new

  # Set the banner
  @banner  = self.class.banner

  # Dupe the class options for this instance
  klass_options = self.class.options
  klass_options.keys.inject(@options) { |memo, key| memo[key] = klass_options[key].dup; memo }

  # Set the default configuration values for this instance
  @options.each do |config_key, config_opts|
    config_opts[:on] ||= :on
    config_opts[:boolean] ||= false
    config_opts[:required] ||= false
    config_opts[:proc] ||= nil
    config_opts[:show_options] ||= false
    config_opts[:exit] ||= nil
  
    if config_opts.has_key?(:default)
      @config[config_key] = config_opts[:default]
    end
  end

  super(*args)
end

#parse_options(argv = ARGV) ⇒ Object

Parses an array, by default ARGV, for command line options (as configured at the class level).

Parameters

argv<Array>

The array of arguments to parse; defaults to ARGV

Returns

argv<Array>

Returns any un-parsed elements.



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# File 'lib/plist4r/mixin/mixlib_cli.rb', line 121

def parse_options(argv=ARGV)
  argv = argv.dup
  @opt_parser = OptionParser.new do |opts|  
    # Set the banner
    opts.banner = banner        
  
    # Create new options
    options.sort { |a, b| a[0].to_s <=> b[0].to_s }.each do |opt_key, opt_val|          
      opt_args = build_option_arguments(opt_val)
    
      opt_method = case opt_val[:on]
        when :on
          :on
        when :tail
          :on_tail
        when :head
          :on_head
        else
          raise ArgumentError, "You must pass :on, :tail, or :head to :on"
        end
                
      parse_block = case opt_val[:boolean]
        when true
          Proc.new() do
            config[opt_key] = (opt_val[:proc] && opt_val[:proc].call(true)) || true
            puts opts if opt_val[:show_options]
            exit opt_val[:exit] if opt_val[:exit]
          end
        when false
          Proc.new() do |c|
            config[opt_key] = (opt_val[:proc] && opt_val[:proc].call(c)) || c
            puts opts if opt_val[:show_options]
            exit opt_val[:exit] if opt_val[:exit]
          end
        end
              
      full_opt = [ opt_method ]
      opt_args.inject(full_opt) { |memo, arg| memo << arg; memo }
      full_opt << parse_block
      opts.send(*full_opt)
    end
  end
  @opt_parser.parse!(argv)

  # Deal with any required values
  options.each do |opt_key, opt_value|
    if opt_value[:required] && ! config[opt_key]
      reqarg = opt_value[:short] || opt_value[:long]
      puts "You must supply #{reqarg}!"
      puts @opt_parser
      exit 2
    end
  end

  argv
end