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require 'rubygems/command'
require 'rubygems/source_index'
require 'rubygems/dependency_list'
require 'rubygems/uninstaller'
class Gem::Commands::CleanupCommand < Gem::Command
def initialize
super 'cleanup',
'Clean up old versions of installed gems in the local repository',
:force => false, :test => false, :install_dir => Gem.dir
add_option('-d', '--dryrun', "") do |value, options|
options[:dryrun] = true
end
end
def arguments # :nodoc:
"GEMNAME name of gem to cleanup"
end
def defaults_str # :nodoc:
"--no-dryrun"
end
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
def usage # :nodoc:
"#{program_name} [GEMNAME ...]"
end
def execute
say "Cleaning up installed gems..."
primary_gems = {}
Gem.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 = Gem::Dependency.new gem_name, Gem::Requirement.default
specs = Gem.source_index.search dep
specs.each do |spec|
gems_to_cleanup << spec
end
end
else
Gem.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 = Gem::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 Gem.user_dir == spec.installation_path then
uninstall_options[:install_dir] = spec.installation_path
end
uninstaller = Gem::Uninstaller.new spec.name, uninstall_options
begin
uninstaller.uninstall
rescue Gem::DependencyRemovalException, Gem::InstallError,
Gem::GemNotInHomeException => e
say "Unable to uninstall #{spec.full_name}:"
say "\t#{e.class}: #{e.message}"
end
end
end
say "Clean Up Complete"
end
end
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