# frozen_string_literal: true require_relative "../command" require_relative "../local_remote_options" require_relative "../version_option" class Gem::Commands::FetchCommand < Gem::Command include Gem::LocalRemoteOptions include Gem::VersionOption def initialize defaults = { suggest_alternate: true, version: Gem::Requirement.default, } super "fetch", "Download a gem and place it in the current directory", defaults add_bulk_threshold_option add_proxy_option add_source_option add_clear_sources_option add_version_option add_platform_option add_prerelease_option add_option "--[no-]suggestions", "Suggest alternates when gems are not found" do |value, options| options[:suggest_alternate] = value end 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 check_version # :nodoc: if options[:version] != Gem::Requirement.default && get_all_gem_names.size > 1 alert_error "Can't use --version with multiple gems. You can specify multiple gems with" \ " version requirements using `gem fetch 'my_gem:1.0.0' 'my_other_gem:~>2.0.0'`" terminate_interaction 1 end end def execute check_version exit_code = fetch_gems terminate_interaction exit_code end private def fetch_gems exit_code = 0 version = options[:version] platform = Gem.platforms.last gem_names = get_all_gem_names_and_versions gem_names.each do |gem_name, gem_version| gem_version ||= version dep = Gem::Dependency.new gem_name, gem_version dep.prerelease = options[:prerelease] suppress_suggestions = !options[:suggest_alternate] specs_and_sources, errors = Gem::SpecFetcher.fetcher.spec_for_dependency dep if platform 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 } if spec.nil? show_lookup_failure gem_name, gem_version, errors, suppress_suggestions, options[:domain] exit_code |= 2 next end source.download spec say "Downloaded #{spec.full_name}" end exit_code end end