# File lib/rubygems/commands/pristine_command.rb, line 10
10:   def initialize
11:     super 'pristine',
12:           'Restores installed gems to pristine condition from files located in the gem cache',
13:           :version => Gem::Requirement.default
14: 
15:     add_option('--all',
16:                'Restore all installed gems to pristine',
17:                'condition') do |value, options|
18:       options[:all] = value
19:     end
20: 
21:     add_version_option('restore to', 'pristine condition')
22:   end

    # File lib/rubygems/commands/pristine_command.rb, line 51
51:   def execute
52:     gem_name = nil
53: 
54:     specs = if options[:all] then
55:               Gem.source_index.map do |name, spec|
56:                 spec
57:               end
58:             else
59:               gem_name = get_one_gem_name
60:               Gem.source_index.find_name(gem_name, options[:version])
61:             end
62: 
63:     if specs.empty? then
64:       raise Gem::Exception,
65:             "Failed to find gem #{gem_name} #{options[:version]}"
66:     end
67: 
68:     install_dir = Gem.dir # TODO use installer option
69: 
70:     raise Gem::FilePermissionError.new(install_dir) unless
71:       File.writable?(install_dir)
72: 
73:     say "Restoring gem(s) to pristine condition..."
74: 
75:     specs.each do |spec|
76:       gem = spec.cache_gem
77: 
78:       if gem.nil? then
79:         require 'rubygems/remote_fetcher'
80: 
81:         say "Cached gem for #{spec.full_name} not found, attempting to fetch..."
82:         dep = Gem::Dependency.new spec.name, spec.version
83:         Gem::RemoteFetcher.fetcher.download_to_cache dep
84:         gem = spec.cache_gem
85:       end
86: 
87:       # TODO use installer options
88:       installer = Gem::Installer.new gem, :wrappers => true, :force => true
89:       installer.install
90: 
91:       say "Restored #{spec.full_name}"
92:     end
93:   end