require 'rubygems' require 'rubygems/dependency_list' require 'rubygems/installer' require 'rubygems/source_info_cache' require 'rubygems/user_interaction' 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 that will install +gem_name+ using # version requirement +version+ and +options+. # # Options are: # :env_shebang:: See Gem::Installer::new. # :domain:: :local, :remote, or :both. :local only searches gems in the # current directory. :remote searches only gems in Gem::sources. # :both searches both. # :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(gem_name, version = nil, options = {}) options = DEFAULT_OPTIONS.merge options @env_shebang = options[:env_shebang] @domain = options[:domain] @force = options[:force] @format_executable = options[:format_executable] @ignore_dependencies = options[:ignore_dependencies] @install_dir = options[:install_dir] || Gem.dir @security_policy = options[:security_policy] @wrappers = options[:wrappers] @installed_gems = [] 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$/ begin spec = Gem::Format.from_file_by_path(gem_file).spec spec_and_source = [spec, gem_file] break rescue SystemCallError, Gem::Package::FormatError end end end if spec_and_source.nil? then version ||= Gem::Requirement.default @dep = Gem::Dependency.new gem_name, version spec_and_sources = find_gems_with_sources(@dep).reverse spec_and_source = spec_and_sources.find do |spec, source| Gem::Platform.match spec.platform end end if spec_and_source.nil? then raise Gem::GemNotFoundException, "could not find #{gem_name} locally or in a repository" end @specs_and_sources = [spec_and_source] gather_dependencies end ## # Returns a list of pairs of gemspecs and source_uris that match # Gem::Dependency +dep+ from both local (Dir.pwd) and remote (Gem.sources) # sources. Gems are sorted with newer gems prefered over older gems, and # local gems prefered over remote gems. def find_gems_with_sources(dep) gems_and_sources = [] if @domain == :both or @domain == :local then Dir[File.join(Dir.pwd, "#{dep.name}-[0-9]*.gem")].each do |gem_file| spec = Gem::Format.from_file_by_path(gem_file).spec gems_and_sources << [spec, gem_file] if spec.name == dep.name end end if @domain == :both or @domain == :remote then gems_and_sources.push(*Gem::SourceInfoCache.search_with_source(dep, true)) end gems_and_sources.sort_by do |gem, source| [gem, source !~ /^http:\/\// ? 1 : 0] # local gems win end end ## # Moves the gem +spec+ from +source_uri+ to the cache dir unless it is # already there. If the source_uri is local the gem cache dir copy is # always replaced. def download(spec, source_uri) gem_file_name = "#{spec.full_name}.gem" local_gem_path = File.join @install_dir, 'cache', gem_file_name Gem.ensure_gem_subdirectories @install_dir source_uri = URI.parse source_uri unless URI::Generic === source_uri scheme = source_uri.scheme # URI.parse gets confused by MS Windows paths with forward slashes. scheme = nil if scheme =~ /^[a-z]$/i case scheme when 'http' then unless File.exist? local_gem_path then begin say "Downloading gem #{gem_file_name}" if Gem.configuration.really_verbose remote_gem_path = source_uri + "gems/#{gem_file_name}" gem = Gem::RemoteFetcher.fetcher.fetch_path remote_gem_path rescue Gem::RemoteFetcher::FetchError raise if spec.original_platform == spec.platform alternate_name = "#{spec.name}-#{spec.version}-#{spec.original_platform}.gem" say "Failed, downloading gem #{alternate_name}" if Gem.configuration.really_verbose remote_gem_path = source_uri + "gems/#{alternate_name}" gem = Gem::RemoteFetcher.fetcher.fetch_path remote_gem_path end File.open local_gem_path, 'wb' do |fp| fp.write gem end end when nil, 'file' then # TODO test for local overriding cache begin FileUtils.cp source_uri.to_s, local_gem_path rescue Errno::EACCES local_gem_path = source_uri.to_s end say "Using local gem #{local_gem_path}" if Gem.configuration.really_verbose else raise Gem::InstallError, "unsupported URI scheme #{source_uri.scheme}" end local_gem_path 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 spec.dependencies.each do |dep| results = find_gems_with_sources(dep).reverse # local gems first 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 to_do.push dep_spec end end end end @gems_to_install = dependency_list.dependency_order.reverse end ## # Installs the gem and all its dependencies. def install spec_dir = File.join @install_dir, 'specifications' source_index = Gem::SourceIndex.from_gems_in spec_dir @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 say "Installing gem #{spec.full_name}" if Gem.configuration.really_verbose _, source_uri = @specs_and_sources.assoc spec local_gem_path = download spec, source_uri 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 spec = inst.install @installed_gems << spec end end end