1 files changed, 50 insertions, 0 deletions
diff --git a/lib/rubygems/resolver/index_set.rb b/lib/rubygems/resolver/index_set.rb
new file mode 100644
index 0000000000..0ba3c78a44
--- /dev/null
+++ b/lib/rubygems/resolver/index_set.rb
@@ -0,0 +1,50 @@
+##
+# The global rubygems pool represented via the traditional
+# source index.
+
+class Gem::Resolver::IndexSet < Gem::Resolver::Set
+
+  def initialize source = nil # :nodoc:
+    @f =
+      if source then
+        sources = Gem::SourceList.from [source]
+
+        Gem::SpecFetcher.new sources
+      else
+        Gem::SpecFetcher.fetcher
+      end
+
+    @all = Hash.new { |h,k| h[k] = [] }
+
+    list, = @f.available_specs :released
+
+    list.each do |uri, specs|
+      specs.each do |n|
+        @all[n.name] << [uri, n]
+      end
+    end
+
+    @specs = {}
+  end
+
+  ##
+  # Return an array of IndexSpecification objects matching
+  # DependencyRequest +req+.
+
+  def find_all req
+    res = []
+
+    name = req.dependency.name
+
+    @all[name].each do |uri, n|
+      if req.dependency.match? n then
+        res << Gem::Resolver::IndexSpecification.new(
+          self, n.name, n.version, uri, n.platform)
+      end
+    end
+
+    res
+  end
+
+end
+