/tools/Ruby/lib/ruby/site_ruby/1.8/rubygems/version_option.rb

 1#--
 2# Copyright 2006 by Chad Fowler, Rich Kilmer, Jim Weirich and others.
 3# All rights reserved.
 4# See LICENSE.txt for permissions.
 5#++
 6
 7require 'rubygems'
 8
 9##
10# Mixin methods for --version and --platform Gem::Command options.
11
12module Gem::VersionOption
13
14  ##
15  # Add the --platform option to the option parser.
16
17  def add_platform_option(task = command, *wrap)
18    OptionParser.accept Gem::Platform do |value|
19      if value == Gem::Platform::RUBY then
20        value
21      else
22        Gem::Platform.new value
23      end
24    end
25
26    add_option('--platform PLATFORM', Gem::Platform,
27               "Specify the platform of gem to #{task}", *wrap) do
28                 |value, options|
29      unless options[:added_platform] then
30        Gem.platforms = [Gem::Platform::RUBY]
31        options[:added_platform] = true
32      end
33
34      Gem.platforms << value unless Gem.platforms.include? value
35    end
36  end
37
38  ##
39  # Add the --prerelease option to the option parser.
40
41  def add_prerelease_option(*wrap)
42    add_option("--[no-]prerelease",
43               "Allow prerelease versions of a gem", *wrap) do |value, options|
44      options[:prerelease] = value
45    end
46  end
47
48  ##
49  # Add the --version option to the option parser.
50
51  def add_version_option(task = command, *wrap)
52    OptionParser.accept Gem::Requirement do |value|
53      Gem::Requirement.new value
54    end
55
56    add_option('-v', '--version VERSION', Gem::Requirement,
57               "Specify version of gem to #{task}", *wrap) do
58                 |value, options|
59      options[:version] = value
60      options[:prerelease] = true if value.prerelease?
61    end
62  end
63
64end
65