require 'rubygems/command' require 'rubygems/local_remote_options' require 'rubygems/version_option' class Gem::Commands::FetchCommand < Gem::Command include Gem::LocalRemoteOptions include Gem::VersionOption def initialize super 'fetch', 'Download a gem and place it in the current directory' add_bulk_threshold_option add_proxy_option add_source_option add_clear_sources_option add_version_option add_platform_option add_prerelease_option end def arguments # :nodoc: 'GEMNAME name of gem to download' end def defaults_str # :nodoc: "--version '#{Gem::Requirement.default}'" end def description # :nodoc: <<-EOF The fetch command fetches gem files that can be stored for later use or unpacked to examine their contents. See the build command help for an example of unpacking a gem, modifying it, then repackaging it. EOF end def usage # :nodoc: "#{program_name} GEMNAME [GEMNAME ...]" end def execute version = options[:version] || Gem::Requirement.default platform = Gem.platforms.last gem_names = get_all_gem_names gem_names.each do |gem_name| dep = Gem::Dependency.new gem_name, version dep.prerelease = options[:prerelease] specs_and_sources, errors = Gem::SpecFetcher.fetcher.spec_for_dependency dep if platform then filtered = specs_and_sources.select { |s,| s.platform == platform } specs_and_sources = filtered unless filtered.empty? end spec, source = specs_and_sources.max_by { |s,| s.version } if spec.nil? then show_lookup_failure gem_name, version, errors, options[:domain] next end source.download spec say "Downloaded #{spec.full_name}" end end end