Class: LibGems::Commands::CleanupCommand

Inherits:
LibGems::Command show all
Defined in:
lib/libgems/commands/cleanup_command.rb

Instance Attribute Summary

Attributes inherited from LibGems::Command

#command, #defaults, #options, #program_name, #summary

Instance Method Summary collapse

Methods inherited from LibGems::Command

add_common_option, #add_extra_args, #add_option, add_specific_extra_args, #begins?, build_args, build_args=, common_options, extra_args, extra_args=, #get_all_gem_names, #get_one_gem_name, #get_one_optional_argument, #handle_options, #handles?, #invoke, #merge_options, #remove_option, #show_help, #show_lookup_failure, specific_extra_args, specific_extra_args_hash, #when_invoked

Methods included from UserInteraction

#methname

Methods included from DefaultUserInteraction

ui, #ui, ui=, #ui=, use_ui, #use_ui

Constructor Details

#initialize ⇒ CleanupCommand

Returns a new instance of CleanupCommand.



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# File 'lib/libgems/commands/cleanup_command.rb', line 8

def initialize
  super 'cleanup',
        'Clean up old versions of installed gems in the local repository',
        :force => false, :test => false, :install_dir => LibGems.dir

  add_option('-d', '--dryrun', "") do |value, options|
    options[:dryrun] = true
  end
end

Instance Method Details

#arguments ⇒ Object

:nodoc:



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# File 'lib/libgems/commands/cleanup_command.rb', line 18

def arguments # :nodoc:
  "GEMNAME       name of gem to cleanup"
end

#defaults_str ⇒ Object

:nodoc:



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# File 'lib/libgems/commands/cleanup_command.rb', line 22

def defaults_str # :nodoc:
  "--no-dryrun"
end

#description ⇒ Object

:nodoc:



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# File 'lib/libgems/commands/cleanup_command.rb', line 26

def description # :nodoc:
  <<-EOF
The cleanup command removes old gems from GEM_HOME.  If an older version is
installed elsewhere in GEM_PATH the cleanup command won't touch it.
  EOF
end

#execute ⇒ Object 



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# File 'lib/libgems/commands/cleanup_command.rb', line 37

def execute
  say "Cleaning up installed gems..."
  primary_gems = {}

  LibGems.source_index.each do |name, spec|
    if primary_gems[spec.name].nil? or
       primary_gems[spec.name].version < spec.version then
      primary_gems[spec.name] = spec
    end
  end

  gems_to_cleanup = []

  unless options[:args].empty? then
    options[:args].each do |gem_name|
      dep = LibGems::Dependency.new gem_name, LibGems::Requirement.default
      specs = LibGems.source_index.search dep
      specs.each do |spec|
        gems_to_cleanup << spec
      end
    end
  else
    LibGems.source_index.each do |name, spec|
      gems_to_cleanup << spec
    end
  end

  gems_to_cleanup = gems_to_cleanup.select { |spec|
    primary_gems[spec.name].version != spec.version
  }

  deplist = LibGems::DependencyList.new
  gems_to_cleanup.uniq.each do |spec| deplist.add spec end

  deps = deplist.strongly_connected_components.flatten.reverse

  deps.each do |spec|
    if options[:dryrun] then
      say "Dry Run Mode: Would uninstall #{spec.full_name}"
    else
      say "Attempting to uninstall #{spec.full_name}"

      options[:args] = [spec.name]

      uninstall_options = {
        :executables => false,
        :version => "= #{spec.version}",
      }

      if LibGems.user_dir == spec.installation_path then
        uninstall_options[:install_dir] = spec.installation_path
      end

      uninstaller = LibGems::Uninstaller.new spec.name, uninstall_options

      begin
        uninstaller.uninstall
      rescue LibGems::DependencyRemovalException, LibGems::InstallError,
             LibGems::GemNotInHomeException => e
        say "Unable to uninstall #{spec.full_name}:"
        say "\t#{e.class}: #{e.message}"
      end
    end
  end

  say "Clean Up Complete"
end

#usage ⇒ Object

:nodoc:



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# File 'lib/libgems/commands/cleanup_command.rb', line 33

def usage # :nodoc:
  "#{program_name} [GEMNAME ...]"
end