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require 'rubygems/command' require 'rubygems/local_remote_options' require 'rubygems/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: "GEMNAME name of gem to show dependencies for" 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} GEMNAME" end def fetch_remote_specs dependency # :nodoc: fetcher = Gem::SpecFetcher.fetcher ss, = fetcher.spec_for_dependency dependency ss.map { \|spec, _\| spec } end def fetch_specs dependency # :nodoc: specs = [] specs.concat dependency.matching_specs if local? specs.concat fetch_remote_specs dependency if remote? ensure_specs specs specs.uniq.sort end def gem_dependency args, version, prerelease # :nodoc: args << '' if args.empty? pattern = if args.length == 1 and args.first =~ /\A\/(.)\/(i)?\z/m then flags = $2 ? Regexp::IGNORECASE : nil Regexp.new $1, flags else /\A#{Regexp.union(args)}/ end dependency = Gem::Deprecate.skip_during { Gem::Dependency.new pattern, version } dependency.prerelease = prerelease dependency end def display_pipe specs # :nodoc: specs.each do \|spec\| unless spec.dependencies.empty? then spec.dependencies.sort_by { \|dep\| dep.name }.each do \|dep\| say "#{dep.name} --version '#{dep.requirement}'" end end end end def display_readable specs, reverse # :nodoc: response = '' specs.each do \|spec\| response << print_dependencies(spec) unless reverse[spec.full_name].empty? then 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 dependency = gem_dependency options[:args], options[:version], options[:prerelease] specs = fetch_specs dependency reverse = reverse_dependencies specs if options[:pipe_format] then display_pipe specs else display_readable specs, reverse end end def ensure_local_only_reverse_dependencies # :nodoc: if options[:reverse_dependencies] and remote? and not local? then 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 = '' response << ' ' * level + "Gem #{spec.full_name}\n" unless spec.dependencies.empty? then spec.dependencies.sort_by { \|dep\| dep.name }.each do \|dep\| response << ' ' * level + " #{dep}\n" end end response end def remote_specs dependency # :nodoc: fetcher = Gem::SpecFetcher.fetcher ss, _ = fetcher.spec_for_dependency dependency ss.map { \|s,o\| s } 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 and dep.requirement.satisfied_by?(spec.version) then result << [sp.full_name, dep] end end end result end end