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# frozen_string_literal: true require_relative "../command" require_relative "../local_remote_options" require_relative "../version_option" class Gem::Commands::DependencyCommand < Gem::Command include Gem::LocalRemoteOptions include Gem::VersionOption def initialize super "dependency", "Show the dependencies of an installed gem", version: Gem::Requirement.default, domain: :local add_version_option add_platform_option add_prerelease_option add_option("-R", "--[no-]reverse-dependencies", "Include reverse dependencies in the output") do |value, options| options[:reverse_dependencies] = value end add_option("-p", "--pipe", "Pipe Format (name --version ver)") do |value, options| options[:pipe_format] = value end add_local_remote_options end def arguments # :nodoc: "REGEXP show dependencies for gems whose names start with REGEXP" end def defaults_str # :nodoc: "--local --version '#{Gem::Requirement.default}' --no-reverse-dependencies" end def description # :nodoc: <<-EOF The dependency commands lists which other gems a given gem depends on. For local gems only the reverse dependencies can be shown (which gems depend on the named gem). The dependency list can be displayed in a format suitable for piping for use with other commands. EOF end def usage # :nodoc: "#{program_name} REGEXP" end def fetch_remote_specs(name, requirement, prerelease) # :nodoc: fetcher = Gem::SpecFetcher.fetcher specs_type = prerelease ? :complete : :released ss = if name.nil? fetcher.detect(specs_type) { true } else fetcher.detect(specs_type) do |name_tuple| name === name_tuple.name && requirement.satisfied_by?(name_tuple.version) end end ss.map {|tuple, source| source.fetch_spec(tuple) } end def fetch_specs(name_pattern, requirement, prerelease) # :nodoc: specs = [] if local? specs.concat Gem::Specification.stubs.find_all {|spec| name_matches = name_pattern ? name_pattern =~ spec.name : true version_matches = requirement.satisfied_by?(spec.version) name_matches && version_matches }.map(&:to_spec) end specs.concat fetch_remote_specs name_pattern, requirement, prerelease if remote? ensure_specs specs specs.uniq.sort end def display_pipe(specs) # :nodoc: specs.each do |spec| next if spec.dependencies.empty? spec.dependencies.sort_by(&:name).each do |dep| say "#{dep.name} --version '#{dep.requirement}'" end end end def display_readable(specs, reverse) # :nodoc: response = String.new specs.each do |spec| response << print_dependencies(spec) unless reverse[spec.full_name].empty? response << " Used by\n" reverse[spec.full_name].each do |sp, dep| response << " #{sp} (#{dep})\n" end end response << "\n" end say response end def execute ensure_local_only_reverse_dependencies pattern = name_pattern options[:args] requirement = Gem::Requirement.new options[:version] specs = fetch_specs pattern, requirement, options[:prerelease] reverse = reverse_dependencies specs if options[:pipe_format] display_pipe specs else display_readable specs, reverse end end def ensure_local_only_reverse_dependencies # :nodoc: if options[:reverse_dependencies] && remote? && !local? alert_error "Only reverse dependencies for local gems are supported." terminate_interaction 1 end end def ensure_specs(specs) # :nodoc: return unless specs.empty? patterns = options[:args].join "," say "No gems found matching #{patterns} (#{options[:version]})" if Gem.configuration.verbose terminate_interaction 1 end def print_dependencies(spec, level = 0) # :nodoc: response = String.new response << " " * level + "Gem #{spec.full_name}\n" unless spec.dependencies.empty? spec.dependencies.sort_by(&:name).each do |dep| response << " " * level + " #{dep}\n" end end response end def reverse_dependencies(specs) # :nodoc: reverse = Hash.new {|h, k| h[k] = [] } return reverse unless options[:reverse_dependencies] specs.each do |spec| reverse[spec.full_name] = find_reverse_dependencies spec end reverse end ## # Returns an Array of [specification, dep] that are satisfied by +spec+. def find_reverse_dependencies(spec) # :nodoc: result = [] Gem::Specification.each do |sp| sp.dependencies.each do |dep| dep = Gem::Dependency.new(*dep) unless Gem::Dependency === dep if spec.name == dep.name && dep.requirement.satisfied_by?(spec.version) result << [sp.full_name, dep] end end end result end private def name_pattern(args) return if args.empty? if args.length == 1 && args.first =~ /\A(.*)(i)?\z/m flags = $2 ? Regexp::IGNORECASE : nil Regexp.new $1, flags else /\A#{Regexp.union(*args)}/ end end end