* lib/rubygems: Update to RubyGems master 6a3d9f9. Changes include:

Compatibly renamed Gem::DependencyResolver to Gem::Resolver.

  Added support for git gems in gem.deps.rb and Gemfile.

  Fixed resolver bugs.

* test/rubygems: ditto.

* lib/rubygems/LICENSE.txt:  Updated to license from RubyGems trunk.
  [ruby-trunk - Bug #9086]

* lib/rubygems/commands/which_command.rb:  RubyGems now indicates
  failure when any file is missing.  [ruby-trunk - Bug #9004]

* lib/rubygems/ext/builder:  Extensions are now installed into the
  extension install directory and the first directory in the require
  path from the gem.  This allows backwards compatibility with msgpack
  and other gems that calculate full require paths.
  [ruby-trunk - Bug #9106]



git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@43714 b2dd03c8-39d4-4d8f-98ff-823fe69b080e

lib/rubygems/resolver/api_set.rb

@@ -0,0 +1,75 @@
+##
+# The global rubygems pool, available via the rubygems.org API.
+# Returns instances of APISpecification.
+
+class Gem::Resolver::APISet < Gem::Resolver::Set
+
+  ##
+  # The URI for the dependency API this APISet uses.
+
+  attr_reader :dep_uri # :nodoc:
+
+  ##
+  # Creates a new APISet that will retrieve gems from +uri+ using the RubyGems
+  # API described at http://guides.rubygems.org/rubygems-org-api
+
+  def initialize uri = 'https://rubygems.org/api/v1/dependencies'
+    uri = URI uri unless URI === uri # for ruby 1.8
+    @data = Hash.new { |h,k| h[k] = [] }
+    @dep_uri = uri
+  end
+
+  ##
+  # Return an array of APISpecification objects matching
+  # DependencyRequest +req+.
+
+  def find_all req
+    res = []
+
+    versions(req.name).each do |ver|
+      if req.dependency.match? req.name, ver[:number]
+        res << Gem::Resolver::APISpecification.new(self, ver)
+      end
+    end
+
+    res
+  end
+
+  ##
+  # A hint run by the resolver to allow the Set to fetch
+  # data for DependencyRequests +reqs+.
+
+  def prefetch reqs
+    names = reqs.map { |r| r.dependency.name }
+    needed = names.find_all { |d| !@data.key?(d) }
+
+    return if needed.empty?
+
+    uri = @dep_uri + "?gems=#{needed.sort.join ','}"
+    str = Gem::RemoteFetcher.fetcher.fetch_path uri
+
+    Marshal.load(str).each do |ver|
+      @data[ver[:name]] << ver
+    end
+  end
+
+  ##
+  # Return data for all versions of the gem +name+.
+
+  def versions name # :nodoc:
+    if @data.key?(name)
+      return @data[name]
+    end
+
+    uri = @dep_uri + "?gems=#{name}"
+    str = Gem::RemoteFetcher.fetcher.fetch_path uri
+
+    Marshal.load(str).each do |ver|
+      @data[ver[:name]] << ver
+    end
+
+    @data[name]
+  end
+
+end
+