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require 'uri' require 'fileutils' ## # A Source knows how to list and fetch gems from a RubyGems marshal index. # # There are other Source subclasses for installed gems, local gems, the # bundler dependency API and so-forth. class Gem::Source include Comparable FILES = { # :nodoc: :released => 'specs', :latest => 'latest_specs', :prerelease => 'prerelease_specs', } ## # The URI this source will fetch gems from. attr_reader :uri ## # Creates a new Source which will use the index located at +uri+. def initialize(uri) begin unless uri.kind_of? URI uri = URI.parse(uri.to_s) end rescue URI::InvalidURIError raise if Gem::Source == self.class end @uri = uri @api_uri = nil end ## # Use an SRV record on the host to look up the true endpoint for the index. def api_uri # :nodoc: require 'rubygems/remote_fetcher' @api_uri ||= Gem::RemoteFetcher.fetcher.api_endpoint uri end ## # Sources are ordered by installation preference. def <=>(other) case other when Gem::Source::Installed, Gem::Source::Local, Gem::Source::Lock, Gem::Source::SpecificFile, Gem::Source::Git, Gem::Source::Vendor then -1 when Gem::Source then if !@uri return 0 unless other.uri return 1 end return -1 if !other.uri @uri.to_s <=> other.uri.to_s else nil end end def == other # :nodoc: self.class === other and @uri == other.uri end alias_method :eql?, :== # :nodoc: ## # Returns a Set that can fetch specifications from this source. def dependency_resolver_set # :nodoc: return Gem::Resolver::IndexSet.new self if 'file' == api_uri.scheme bundler_api_uri = api_uri + './api/v1/dependencies' begin fetcher = Gem::RemoteFetcher.fetcher response = fetcher.fetch_path bundler_api_uri, nil, true rescue Gem::RemoteFetcher::FetchError Gem::Resolver::IndexSet.new self else if response.respond_to? :uri then Gem::Resolver::APISet.new response.uri else Gem::Resolver::APISet.new bundler_api_uri end end end def hash # :nodoc: @uri.hash end ## # Returns the local directory to write +uri+ to. def cache_dir(uri) # Correct for windows paths escaped_path = uri.path.sub(/^\/([a-z]):\//i, '/\\1-/') escaped_path.untaint File.join Gem.spec_cache_dir, "#{uri.host}%#{uri.port}", File.dirname(escaped_path) end ## # Returns true when it is possible and safe to update the cache directory. def update_cache? @update_cache ||= begin File.stat(Gem.user_home).uid == Process.uid rescue Errno::ENOENT false end end ## # Fetches a specification for the given +name_tuple+. def fetch_spec name_tuple fetcher = Gem::RemoteFetcher.fetcher spec_file_name = name_tuple.spec_name uri = api_uri + "#{Gem::MARSHAL_SPEC_DIR}#{spec_file_name}" cache_dir = cache_dir uri local_spec = File.join cache_dir, spec_file_name if File.exist? local_spec then spec = Gem.read_binary local_spec spec = Marshal.load(spec) rescue nil return spec if spec end uri.path << '.rz' spec = fetcher.fetch_path uri spec = Gem.inflate spec if update_cache? then FileUtils.mkdir_p cache_dir open local_spec, 'wb' do |io| io.write spec end end # TODO: Investigate setting Gem::Specification#loaded_from to a URI Marshal.load spec end ## # Loads +type+ kind of specs fetching from +@uri+ if the on-disk cache is # out of date. # # +type+ is one of the following: # # :released => Return the list of all released specs # :latest => Return the list of only the highest version of each gem # :prerelease => Return the list of all prerelease only specs # def load_specs(type) file = FILES[type] fetcher = Gem::RemoteFetcher.fetcher file_name = "#{file}.#{Gem.marshal_version}" spec_path = api_uri + "#{file_name}.gz" cache_dir = cache_dir spec_path local_file = File.join(cache_dir, file_name) retried = false FileUtils.mkdir_p cache_dir if update_cache? spec_dump = fetcher.cache_update_path spec_path, local_file, update_cache? begin Gem::NameTuple.from_list Marshal.load(spec_dump) rescue ArgumentError if update_cache? && !retried FileUtils.rm local_file retried = true retry else raise Gem::Exception.new("Invalid spec cache file in #{local_file}") end end end ## # Downloads +spec+ and writes it to +dir+. See also # Gem::RemoteFetcher#download. def download(spec, dir=Dir.pwd) fetcher = Gem::RemoteFetcher.fetcher fetcher.download spec, api_uri.to_s, dir end def pretty_print q # :nodoc: q.group 2, '[Remote:', ']' do q.breakable q.text @uri.to_s if api = api_uri q.breakable q.text 'API URI: ' q.text api.to_s end end end end require 'rubygems/source/git' require 'rubygems/source/installed' require 'rubygems/source/specific_file' require 'rubygems/source/local' require 'rubygems/source/lock' require 'rubygems/source/vendor'