Set GEM_HOME and GEM_PATH correctly when locked

lib/bundler/environment.rb

@@ -97,9 +97,8 @@ def specs_for_lock_file
         }
         if s.respond_to?(:relative_loaded_from) && s.relative_loaded_from
           hash[:virtual_spec] = s.to_ruby
-        else
-          hash[:loaded_from] = s.loaded_from.to_s
         end
+        hash[:loaded_from] = s.loaded_from.to_s
         hash
       end
     end

lib/bundler/templates/environment.erb

@@ -1,7 +1,7 @@
 # DO NOT MODIFY THIS FILE
 
 require 'digest/sha1'
-require "rubygems"
+require 'rubygems'
 
 <%= shared_helpers %>
 
@@ -14,11 +14,11 @@ module Bundler
     <%= spec.inspect %>,
     <% end -%>
   ].map do |hash|
-    if hash[:loaded_from]
+    if hash[:virtual_spec]
+      spec = eval(hash[:virtual_spec], binding, "<virtual spec for '#{hash[:name]}'>")
+    else
       dir = File.dirname(hash[:loaded_from])
       spec = Dir.chdir(dir){ eval(File.read(hash[:loaded_from]), binding, hash[:loaded_from]) }
-    else
-      spec = eval(hash[:virtual_spec], binding, "<virtual spec for '#{hash[:name]}'>")
     end
     spec.loaded_from = hash[:loaded_from]
     spec.require_paths = hash[:load_paths]
@@ -27,6 +27,15 @@ module Bundler
 
   extend SharedHelpers
 
+  def self.configure_gem_path_and_home(specs)
+    # Fix paths, so that Gem.source_index and such will work
+    paths = specs.map{|s| s.installation_path }
+    paths.flatten!; paths.compact!; paths.uniq!; paths.reject!{|p| p.empty? }
+    ENV['GEM_PATH'] = paths.join(File::PATH_SEPARATOR)
+    ENV['GEM_HOME'] = paths.first
+    Gem.clear_paths
+  end
+
   def self.match_fingerprint
     print = Digest::SHA1.hexdigest(File.read(File.expand_path('../../Gemfile', __FILE__)))
     unless print == FINGERPRINT
@@ -38,6 +47,7 @@ module Bundler
     match_fingerprint
     clean_load_path
     cripple_rubygems(SPECS)
+    configure_gem_path_and_home(SPECS)
     SPECS.each do |spec|
       Gem.loaded_specs[spec.name] = spec
       $LOAD_PATH.unshift(*spec.require_paths)

spec/runtime/environment_rb_spec.rb

@@ -17,6 +17,7 @@
 
     it "works with gems from git that don't have gemspecs" do
       run <<-R, :lite_runtime => true
+        `open '.bundle/environment.rb'`
         require 'no-gemspec'
         puts NOGEMSPEC
       R
@@ -73,6 +74,37 @@
 
       out.should == "rack is not part of the bundle. Add it to Gemfile."
     end
+
+    it "sets GEM_HOME appropriately" do
+      run "puts ENV['GEM_HOME']", :lite_runtime => true
+      out.should == default_bundle_path.to_s
+    end
+
+    it "sets GEM_PATH appropriately" do
+      run "puts Gem.path", :lite_runtime => true
+      out.should == default_bundle_path.to_s
+    end
+  end
+
+  describe "with system gems in the bundle" do
+    before :each do
+      system_gems "rack-1.0.0"
+
+      install_gemfile <<-G
+        source "file://#{gem_repo1}"
+        gem "rack", "1.0.0"
+        gem "activesupport", "2.3.5"
+      G
+
+      bundle :lock
+    end
+
+    it "sets GEM_PATH appropriately" do
+      run "puts Gem.path", :lite_runtime => true
+      paths = out.split("\n")
+      paths.should include(system_gem_path.to_s)
+      paths.should include(default_bundle_path.to_s)
+    end
   end
 
   describe "with a gemspec that requires other files" do