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|
specs = Gem.cache.search(/^#{gem_name}$/i)
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
}
uninstall_command = Gem::CommandManager.instance['uninstall']
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]
options[:version] = "= #{spec.version}"
options[:executables] = false
uninstaller = Gem::Uninstaller.new spec.name, options
begin
uninstaller.uninstall
rescue Gem::DependencyRemovalException,
Gem::GemNotInHomeException => e
say "Unable to uninstall #{spec.full_name}:"
say "\t#{e.class}: #{e.message}"
end
end
end
say "Clean Up Complete"
end