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.
Creates a new Source
which will use the index located at uri
.
# File rubygems/source.rb, line 28 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 end
Sources are ordered by installation preference.
# File rubygems/source.rb, line 43 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 # 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 else nil end end
Returns the local directory to write uri
to.
# File rubygems/source.rb, line 109 def cache_dir(uri) # Correct for windows paths escaped_path = uri.path.sub(/^\/([a-z]):\//i, '/\\1-/') escaped_path.tap(&Gem::UNTAINT) File.join Gem.spec_cache_dir, "#{uri.host}%#{uri.port}", File.dirname(escaped_path) end
Downloads spec
and writes it to dir
. See also Gem::RemoteFetcher#download
.
# File rubygems/source.rb, line 211 def download(spec, dir=Dir.pwd) fetcher = Gem::RemoteFetcher.fetcher fetcher.download spec, uri.to_s, dir end
Fetches a specification for the given name_tuple
.
# File rubygems/source.rb, line 132 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 spec = Marshal.load(spec) rescue nil 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 # 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kind of specs fetching from +@uri+ if the on-disk cache is out of date.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
# File rubygems/source.rb, line 178 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? 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