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ruby33
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share
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rubygems
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rubygems
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source.rb
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# frozen_string_literal: true require_relative "text" ## # 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 include Gem::Text FILES = { # :nodoc: released: "specs", latest: "latest_specs", prerelease: "prerelease_specs", }.freeze ## # 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) require_relative "uri" @uri = Gem::Uri.parse!(uri) @update_cache = nil 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 unless @uri return 0 unless other.uri return 1 end return -1 unless other.uri # Returning 1 here ensures that when sorting a list of sources, the # original ordering of sources supplied by the user is preserved. return 1 unless @uri.to_s == other.uri.to_s 0 end end def ==(other) # :nodoc: self.class === other && @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 uri.scheme == "file" fetch_uri = if uri.host == "rubygems.org" index_uri = uri.dup index_uri.host = "index.rubygems.org" index_uri else uri end bundler_api_uri = enforce_trailing_slash(fetch_uri) begin fetcher = Gem::RemoteFetcher.fetcher response = fetcher.fetch_path bundler_api_uri, nil, true rescue Gem::RemoteFetcher::FetchError Gem::Resolver::IndexSet.new self else Gem::Resolver::APISet.new response.uri + "./info/" 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(%r{^/([a-z]):/}i, '/\\1-/') 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? return @update_cache unless @update_cache.nil? @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 source_uri = enforce_trailing_slash(uri) + "#{Gem::MARSHAL_SPEC_DIR}#{spec_file_name}" cache_dir = cache_dir source_uri local_spec = File.join cache_dir, spec_file_name if File.exist? local_spec spec = Gem.read_binary local_spec Gem.load_safe_marshal spec = begin Gem::SafeMarshal.safe_load(spec) rescue StandardError nil end return spec if spec end source_uri.path << ".rz" spec = fetcher.fetch_path source_uri spec = Gem::Util.inflate spec if update_cache? require "fileutils" FileUtils.mkdir_p cache_dir File.open local_spec, "wb" do |io| io.write spec end end Gem.load_safe_marshal # TODO: Investigate setting Gem::Specification#loaded_from to a URI Gem::SafeMarshal.safe_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 = enforce_trailing_slash(uri) + "#{file_name}.gz" cache_dir = cache_dir spec_path local_file = File.join(cache_dir, file_name) retried = false if update_cache? require "fileutils" FileUtils.mkdir_p cache_dir end spec_dump = fetcher.cache_update_path spec_path, local_file, update_cache? Gem.load_safe_marshal begin Gem::NameTuple.from_list Gem::SafeMarshal.safe_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, uri.to_s, dir end def pretty_print(q) # :nodoc: q.group 2, "[Remote:", "]" do q.breakable q.text @uri.to_s if api = uri q.breakable q.text "API URI: " q.text api.to_s end end end def typo_squatting?(host, distance_threshold=4) return if @uri.host.nil? levenshtein_distance(@uri.host, host).between? 1, distance_threshold end private def enforce_trailing_slash(uri) uri.merge(uri.path.gsub(%r{/+$}, "") + "/") end end require_relative "source/git" require_relative "source/installed" require_relative "source/specific_file" require_relative "source/local" require_relative "source/lock" require_relative "source/vendor"