diff options
Diffstat (limited to 'trunk/lib/rubygems/commands/dependency_command.rb')
-rw-r--r-- | trunk/lib/rubygems/commands/dependency_command.rb | 188 |
1 files changed, 188 insertions, 0 deletions
diff --git a/trunk/lib/rubygems/commands/dependency_command.rb b/trunk/lib/rubygems/commands/dependency_command.rb new file mode 100644 index 0000000000..44b269bb11 --- /dev/null +++ b/trunk/lib/rubygems/commands/dependency_command.rb @@ -0,0 +1,188 @@ +require 'rubygems/command' +require 'rubygems/local_remote_options' +require 'rubygems/version_option' +require 'rubygems/source_info_cache' + +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_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 usage # :nodoc: + "#{program_name} GEMNAME" + end + + def execute + options[:args] << '' if options[:args].empty? + specs = {} + + source_indexes = Hash.new do |h, source_uri| + h[source_uri] = Gem::SourceIndex.new + end + + pattern = if options[:args].length == 1 and + options[:args].first =~ /\A\/(.*)\/(i)?\z/m then + flags = $2 ? Regexp::IGNORECASE : nil + Regexp.new $1, flags + else + /\A#{Regexp.union(*options[:args])}/ + end + + dependency = Gem::Dependency.new pattern, options[:version] + + if options[:reverse_dependencies] and remote? and not local? then + alert_error 'Only reverse dependencies for local gems are supported.' + terminate_interaction 1 + end + + if local? then + Gem.source_index.search(dependency).each do |spec| + source_indexes[:local].add_spec spec + end + end + + if remote? and not options[:reverse_dependencies] then + fetcher = Gem::SpecFetcher.fetcher + + begin + fetcher.find_matching(dependency).each do |spec_tuple, source_uri| + spec = fetcher.fetch_spec spec_tuple, URI.parse(source_uri) + + source_indexes[source_uri].add_spec spec + end + rescue Gem::RemoteFetcher::FetchError => e + raise unless fetcher.warn_legacy e do + require 'rubygems/source_info_cache' + + specs = Gem::SourceInfoCache.search_with_source dependency, false + + specs.each do |spec, source_uri| + source_indexes[source_uri].add_spec spec + end + end + end + end + + if source_indexes.empty? then + patterns = options[:args].join ',' + say "No gems found matching #{patterns} (#{options[:version]})" if + Gem.configuration.verbose + + terminate_interaction 1 + end + + specs = {} + + source_indexes.values.each do |source_index| + source_index.gems.each do |name, spec| + specs[spec.full_name] = [source_index, spec] + end + end + + reverse = Hash.new { |h, k| h[k] = [] } + + if options[:reverse_dependencies] then + specs.values.each do |_, spec| + reverse[spec.full_name] = find_reverse_dependencies spec + end + end + + if options[:pipe_format] then + specs.values.sort_by { |_, spec| spec }.each do |_, spec| + unless spec.dependencies.empty? + spec.dependencies.each do |dep| + say "#{dep.name} --version '#{dep.version_requirements}'" + end + end + end + else + response = '' + + specs.values.sort_by { |_, spec| spec }.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 + end + + def print_dependencies(spec, level = 0) + response = '' + response << ' ' * level + "Gem #{spec.full_name}\n" + unless spec.dependencies.empty? then + spec.dependencies.each do |dep| + response << ' ' * level + " #{dep}\n" + end + end + response + end + + # Retuns list of [specification, dep] that are satisfied by spec. + def find_reverse_dependencies(spec) + result = [] + + Gem.source_index.each do |name, sp| + sp.dependencies.each do |dep| + dep = Gem::Dependency.new(*dep) unless Gem::Dependency === dep + + if spec.name == dep.name and + dep.version_requirements.satisfied_by?(spec.version) then + result << [sp.full_name, dep] + end + end + end + + result + end + + def find_gems(name, source_index) + specs = {} + + spec_list = source_index.search name, options[:version] + + spec_list.each do |spec| + specs[spec.full_name] = [source_index, spec] + end + + specs + end + +end + |