Gem::Commands::LockCommand

    # File lib/rubygems/commands/lock_command.rb, line 5
 5:   def initialize
 6:     super 'lock', 'Generate a lockdown list of gems',
 7:           :strict => false
 8: 
 9:     add_option '-s', '--[no-]strict',
10:                'fail if unable to satisfy a dependency' do |strict, options|
11:       options[:strict] = strict
12:     end
13:   end

    # File lib/rubygems/commands/lock_command.rb, line 60
60:   def complain(message)
61:     if options[:strict] then
62:       raise Gem::Exception, message
63:     else
64:       say "# #{message}"
65:     end
66:   end

    # File lib/rubygems/commands/lock_command.rb, line 68
68:   def execute
69:     say "require 'rubygems'"
70: 
71:     locked = {}
72: 
73:     pending = options[:args]
74: 
75:     until pending.empty? do
76:       full_name = pending.shift
77: 
78:       spec = Gem::Specification.load spec_path(full_name)
79: 
80:       if spec.nil? then
81:         complain "Could not find gem #{full_name}, try using the full name"
82:         next
83:       end
84: 
85:       say "gem '#{spec.name}', '= #{spec.version}'" unless locked[spec.name]
86:       locked[spec.name] = true
87: 
88:       spec.runtime_dependencies.each do |dep|
89:         next if locked[dep.name]
90:         candidates = dep.matching_specs
91: 
92:         if candidates.empty? then
93:           complain "Unable to satisfy '#{dep}' from currently installed gems"
94:         else
95:           pending << candidates.last.full_name
96:         end
97:       end
98:     end
99:   end

     # File lib/rubygems/commands/lock_command.rb, line 101
101:   def spec_path(gem_full_name)
102:     gemspecs = Gem.path.map { |path|
103:       File.join path, "specifications", "#{gem_full_name}.gemspec"
104:     }
105: 
106:     gemspecs.find { |path| File.exist? path }
107:   end