1 files changed, 89 insertions, 2 deletions
diff --git a/lib/rubygems/source_local.rb b/lib/rubygems/source_local.rb
index 0808f4694a..44b170c4a4 100644
--- a/lib/rubygems/source_local.rb
+++ b/lib/rubygems/source_local.rb
@@ -1,5 +1,92 @@
 require 'rubygems/source'
-require 'rubygems/source_local'
 
-# TODO warn upon require, this file is deprecated.
+class Gem::Source::Local < Gem::Source
+  def initialize
+    @uri = nil
+  end
 
+  def load_specs(type)
+    names = []
+
+    @specs = {}
+
+    Dir["*.gem"].each do |file|
+      begin
+        pkg = Gem::Package.new(file)
+      rescue SystemCallError, Gem::Package::FormatError
+        # ignore
+      else
+        tup = pkg.spec.name_tuple
+        @specs[tup] = [File.expand_path(file), pkg]
+
+        case type
+        when :released
+          unless pkg.spec.version.prerelease?
+            names << pkg.spec.name_tuple
+          end
+        when :prerelease
+          if pkg.spec.version.prerelease?
+            names << pkg.spec.name_tuple
+          end
+        when :latest
+          tup = pkg.spec.name_tuple
+
+          cur = names.find { |x| x.name == tup.name }
+          if !cur
+            names << tup
+          elsif cur.version < tup.version
+            names.delete cur
+            names << tup
+          end
+        else
+          names << pkg.spec.name_tuple
+        end
+      end
+    end
+
+    names
+  end
+
+  def find_gem(gem_name, version=Gem::Requirement.default,
+               prerelease=false)
+    load_specs :complete
+
+    found = []
+
+    @specs.each do |n, data|
+      if n.name == gem_name
+        s = data[1].spec
+
+        if version.satisfied_by?(s.version)
+          if prerelease
+            found << s
+          elsif !s.version.prerelease?
+            found << s
+          end
+        end
+      end
+    end
+
+    found.sort_by { |s| s.version }.last
+  end
+
+  def fetch_spec(name)
+    load_specs :complete
+
+    if data = @specs[name]
+      data.last.spec
+    else
+      raise Gem::Exception, "Unable to find spec for '#{name}'"
+    end
+  end
+
+  def download(spec, cache_dir=nil)
+    load_specs :complete
+
+    @specs.each do |name, data|
+      return data[0] if data[1].spec == spec
+    end
+
+    raise Gem::Exception, "Unable to find file for '#{spec.full_name}'"
+  end
+end