require 'rubygems' require 'rubygems/dependency_list' require 'rubygems/installer' require 'rubygems/spec_fetcher' require 'rubygems/user_interaction' ## # Installs a gem along with all its dependencies from local and remote gems. class Gem::DependencyInstaller include Gem::UserInteraction attr_reader :gems_to_install attr_reader :installed_gems DEFAULT_OPTIONS = { :env_shebang => false, :domain => :both, # HACK dup :force => false, :format_executable => false, # HACK dup :ignore_dependencies => false, :security_policy => nil, # HACK NoSecurity requires OpenSSL. AlmostNo? Low? :wrappers => true } ## # Creates a new installer instance. # # Options are: # :cache_dir:: Alternate repository path to store .gem files in. # :domain:: :local, :remote, or :both. :local only searches gems in the # current directory. :remote searches only gems in Gem::sources. # :both searches both. # :env_shebang:: See Gem::Installer::new. # :force:: See Gem::Installer#install. # :format_executable:: See Gem::Installer#initialize. # :ignore_dependencies:: Don't install any dependencies. # :install_dir:: See Gem::Installer#install. # :security_policy:: See Gem::Installer::new and Gem::Security. # :wrappers:: See Gem::Installer::new def initialize(options = {}) options = DEFAULT_OPTIONS.merge options @bin_dir = options[:bin_dir] @development = options[:development] @domain = options[:domain] @env_shebang = options[:env_shebang] @force = options[:force] @format_executable = options[:format_executable] @ignore_dependencies = options[:ignore_dependencies] @security_policy = options[:security_policy] @wrappers = options[:wrappers] @installed_gems = [] @install_dir = options[:install_dir] || Gem.dir @cache_dir = options[:cache_dir] || @install_dir if options[:install_dir] then spec_dir = File.join @install_dir, 'specifications' @source_index = Gem::SourceIndex.from_gems_in spec_dir else @source_index = Gem.source_index end end ## # Returns a list of pairs of gemspecs and source_uris that match # Gem::Dependency +dep+ from both local (Dir.pwd) and remote (Gem.sources) # sources. Gems are sorted with newer gems prefered over older gems, and # local gems preferred over remote gems. def find_gems_with_sources(dep) gems_and_sources = [] if @domain == :both or @domain == :local then Dir[File.join(Dir.pwd, "#{dep.name}-[0-9]*.gem")].each do |gem_file| spec = Gem::Format.from_file_by_path(gem_file).spec gems_and_sources << [spec, gem_file] if spec.name == dep.name end end if @domain == :both or @domain == :remote then begin requirements = dep.version_requirements.requirements.map do |req, ver| req end all = requirements.length > 1 || (requirements.first != ">=" and requirements.first != ">") found = Gem::SpecFetcher.fetcher.fetch dep, all gems_and_sources.push(*found) rescue Gem::RemoteFetcher::FetchError => e if Gem.configuration.really_verbose then say "Error fetching remote data:\t\t#{e.message}" say "Falling back to local-only install" end @domain = :local end end gems_and_sources.sort_by do |gem, source| [gem, source =~ /^http:\/\// ? 0 : 1] # local gems win end end ## # Gathers all dependencies necessary for the installation from local and # remote sources unless the ignore_dependencies was given. def gather_dependencies specs = @specs_and_sources.map { |spec,_| spec } dependency_list = Gem::DependencyList.new dependency_list.add(*specs) unless @ignore_dependencies then to_do = specs.dup seen = {} until to_do.empty? do spec = to_do.shift next if spec.nil? or seen[spec.name] seen[spec.name] = true deps = spec.runtime_dependencies deps |= spec.development_dependencies if @development deps.each do |dep| results = find_gems_with_sources(dep).reverse results.reject! do |dep_spec,| to_do.push dep_spec @source_index.any? do |_, installed_spec| dep.name == installed_spec.name and dep.version_requirements.satisfied_by? installed_spec.version end end results.each do |dep_spec, source_uri| next if seen[dep_spec.name] @specs_and_sources << [dep_spec, source_uri] dependency_list.add dep_spec end end end end @gems_to_install = dependency_list.dependency_order.reverse end ## # Finds a spec and the source_uri it came from for gem +gem_name+ and # +version+. Returns an Array of specs and sources required for # installation of the gem. def find_spec_by_name_and_version gem_name, version = Gem::Requirement.default spec_and_source = nil glob = if File::ALT_SEPARATOR then gem_name.gsub File::ALT_SEPARATOR, File::SEPARATOR else gem_name end local_gems = Dir["#{glob}*"].sort.reverse unless local_gems.empty? then local_gems.each do |gem_file| next unless gem_file =~ /gem$/ begin spec = Gem::Format.from_file_by_path(gem_file).spec spec_and_source = [spec, gem_file] break rescue SystemCallError, Gem::Package::FormatError end end end if spec_and_source.nil? then dep = Gem::Dependency.new gem_name, version spec_and_sources = find_gems_with_sources(dep).reverse spec_and_source = spec_and_sources.find { |spec, source| Gem::Platform.match spec.platform } end if spec_and_source.nil? then raise Gem::GemNotFoundException, "could not find gem #{gem_name} locally or in a repository" end @specs_and_sources = [spec_and_source] end ## # Installs the gem and all its dependencies. Returns an Array of installed # gems specifications. def install dep_or_name, version = Gem::Requirement.default if String === dep_or_name then find_spec_by_name_and_version dep_or_name, version else @specs_and_sources = [find_gems_with_sources(dep_or_name).last] end @installed_gems = [] gather_dependencies @gems_to_install.each do |spec| last = spec == @gems_to_install.last # HACK is this test for full_name acceptable? next if @source_index.any? { |n,_| n == spec.full_name } and not last # TODO: make this sorta_verbose so other users can benefit from it say "Installing gem #{spec.full_name}" if Gem.configuration.really_verbose _, source_uri = @specs_and_sources.assoc spec begin local_gem_path = Gem::RemoteFetcher.fetcher.download spec, source_uri, @cache_dir rescue Gem::RemoteFetcher::FetchError next if @force raise end inst = Gem::Installer.new local_gem_path, :env_shebang => @env_shebang, :force => @force, :format_executable => @format_executable, :ignore_dependencies => @ignore_dependencies, :install_dir => @install_dir, :security_policy => @security_policy, :wrappers => @wrappers, :bin_dir => @bin_dir, :development => @development spec = inst.install @installed_gems << spec end @installed_gems end end