allow specifying gem source via env var

diff --git a/Gemfile b/Gemfile
index b89b579d5d2ad9d5c8828bf608eb0347c0d76bac..b126d1ede69a68312631cbb9b708e72d318f0120 100644 (file)
--- a/Gemfile
+++ b/Gemfile
@@ -1,4 +1,4 @@
-source 'https://rubygems.org'
+source ENV['GEM_SOURCE'] || 'https://rubygems.org'
 
 group :development, :test do
   gem 'rake',                    :require => false