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uninstall_command.rb
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# frozen_string_literal: true require_relative "../command" require_relative "../version_option" require_relative "../uninstaller" require "fileutils" ## # Gem uninstaller command line tool # # See `gem help uninstall` class Gem::Commands::UninstallCommand < Gem::Command include Gem::VersionOption def initialize super "uninstall", "Uninstall gems from the local repository", version: Gem::Requirement.default, user_install: true, check_dev: false, vendor: false add_option("-a", "--[no-]all", "Uninstall all matching versions") do |value, options| options[:all] = value end add_option("-I", "--[no-]ignore-dependencies", "Ignore dependency requirements while", "uninstalling") do |value, options| options[:ignore] = value end add_option("-D", "--[no-]check-development", "Check development dependencies while uninstalling", "(default: false)") do |value, options| options[:check_dev] = value end add_option("-x", "--[no-]executables", "Uninstall applicable executables without", "confirmation") do |value, options| options[:executables] = value end add_option("-i", "--install-dir DIR", "Directory to uninstall gem from") do |value, options| options[:install_dir] = File.expand_path(value) end add_option("-n", "--bindir DIR", "Directory to remove executables from") do |value, options| options[:bin_dir] = File.expand_path(value) end add_option("--[no-]user-install", "Uninstall from user's home directory", "in addition to GEM_HOME.") do |value, options| options[:user_install] = value end add_option("--[no-]format-executable", "Assume executable names match Ruby's prefix and suffix.") do |value, options| options[:format_executable] = value end add_option("--[no-]force", "Uninstall all versions of the named gems", "ignoring dependencies") do |value, options| options[:force] = value end add_option("--[no-]abort-on-dependent", "Prevent uninstalling gems that are", "depended on by other gems.") do |value, options| options[:abort_on_dependent] = value end add_version_option add_platform_option add_option("--vendor", "Uninstall gem from the vendor directory.", "Only for use by gem repackagers.") do |_value, options| unless Gem.vendor_dir raise Gem::OptionParser::InvalidOption.new "your platform is not supported" end alert_warning "Use your OS package manager to uninstall vendor gems" options[:vendor] = true options[:install_dir] = Gem.vendor_dir end end def arguments # :nodoc: "GEMNAME name of gem to uninstall" end def defaults_str # :nodoc: "--version '#{Gem::Requirement.default}' --no-force " \ "--user-install" end def description # :nodoc: <<-EOF The uninstall command removes a previously installed gem. RubyGems will ask for confirmation if you are attempting to uninstall a gem that is a dependency of an existing gem. You can use the --ignore-dependencies option to skip this check. 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 uninstall 'my_gem:1.0.0' 'my_other_gem:~>2.0.0'`" terminate_interaction 1 end end def execute check_version # Consider only gem specifications installed at `--install-dir` Gem::Specification.dirs = options[:install_dir] if options[:install_dir] if options[:all] && !options[:args].empty? uninstall_specific elsif options[:all] uninstall_all else uninstall_specific end end def uninstall_all specs = Gem::Specification.reject(&:default_gem?) specs.each do |spec| options[:version] = spec.version uninstall_gem spec.name end alert "Uninstalled all gems in #{options[:install_dir] || Gem.dir}" end def uninstall_specific deplist = Gem::DependencyList.new original_gem_version = {} get_all_gem_names_and_versions.each do |name, version| original_gem_version[name] = version || options[:version] gem_specs = Gem::Specification.find_all_by_name(name, original_gem_version[name]) say("Gem '#{name}' is not installed") if gem_specs.empty? gem_specs.each do |spec| deplist.add spec end end deps = deplist.strongly_connected_components.flatten.reverse gems_to_uninstall = {} deps.each do |dep| if original_gem_version[dep.name] == Gem::Requirement.default next if gems_to_uninstall[dep.name] gems_to_uninstall[dep.name] = true else options[:version] = dep.version end uninstall_gem(dep.name) end end def uninstall_gem(gem_name) uninstall(gem_name) rescue Gem::GemNotInHomeException => e spec = e.spec alert("In order to remove #{spec.name}, please execute:\n" \ "\tgem uninstall #{spec.name} --install-dir=#{spec.base_dir}") rescue Gem::UninstallError => e spec = e.spec alert_error("Error: unable to successfully uninstall '#{spec.name}' which is " \ "located at '#{spec.full_gem_path}'. This is most likely because" \ "the current user does not have the appropriate permissions") terminate_interaction 1 end def uninstall(gem_name) Gem::Uninstaller.new(gem_name, options).uninstall end end