Class | Gem::Commands::UnpackCommand |
In: |
lib/rubygems/commands/unpack_command.rb
|
Parent: | Gem::Command |
# File lib/rubygems/commands/unpack_command.rb, line 10 10: def initialize 11: super 'unpack', 'Unpack an installed gem to the current directory', 12: :version => Gem::Requirement.default, 13: :target => Dir.pwd 14: 15: add_option('--target', 'target directory for unpacking') do |value, options| 16: options[:target] = value 17: end 18: 19: add_version_option 20: end
# File lib/rubygems/commands/unpack_command.rb, line 38 38: def execute 39: gemname = get_one_gem_name 40: path = get_path(gemname, options[:version]) 41: 42: if path then 43: basename = File.basename(path).sub(/\.gem$/, '') 44: target_dir = File.expand_path File.join(options[:target], basename) 45: FileUtils.mkdir_p target_dir 46: Gem::Installer.new(path, :unpack => true).unpack target_dir 47: say "Unpacked gem: '#{target_dir}'" 48: else 49: alert_error "Gem '#{gemname}' not installed." 50: end 51: end
Return the full path to the cached gem file matching the given name and version requirement. Returns ‘nil’ if no match.
Example:
get_path('rake', '> 0.4') # -> '/usr/lib/ruby/gems/1.8/cache/rake-0.4.2.gem' get_path('rake', '< 0.1') # -> nil get_path('rak') # -> nil (exact name required)
# File lib/rubygems/commands/unpack_command.rb, line 68 68: def get_path(gemname, version_req) 69: return gemname if gemname =~ /\.gem$/i 70: 71: specs = Gem::source_index.find_name gemname, version_req 72: 73: selected = specs.sort_by { |s| s.version }.last 74: 75: return nil if selected.nil? 76: 77: # We expect to find (basename).gem in the 'cache' directory. 78: # Furthermore, the name match must be exact (ignoring case). 79: if gemname =~ /^#{selected.name}$/i 80: filename = selected.full_name + '.gem' 81: path = nil 82: 83: Gem.path.find do |gem_dir| 84: path = File.join gem_dir, 'cache', filename 85: File.exist? path 86: end 87: 88: path 89: else 90: nil 91: end 92: end