Gemfile in dm-serializer-1.2.0.rc1 vs Gemfile in dm-serializer-1.2.0.rc2

@@ -3,23 +3,30 @@
 source 'http://rubygems.org'
 
 SOURCE         = ENV.fetch('SOURCE', :git).to_sym
 REPO_POSTFIX   = SOURCE == :path ? ''                                : '.git'
 DATAMAPPER     = SOURCE == :path ? Pathname(__FILE__).dirname.parent : 'http://github.com/datamapper'
-DM_VERSION     = '~> 1.2.0.rc1'
+DM_VERSION     = '~> 1.2.0.rc2'
 DO_VERSION     = '~> 0.10.6'
 DM_DO_ADAPTERS = %w[ sqlite postgres mysql oracle sqlserver ]
+CURRENT_BRANCH = ENV.fetch('GIT_BRANCH', 'master')
 
-gem 'dm-core',    DM_VERSION, SOURCE => "#{DATAMAPPER}/dm-core#{REPO_POSTFIX}"
+gem 'dm-core', DM_VERSION,
+  SOURCE  => "#{DATAMAPPER}/dm-core#{REPO_POSTFIX}",
+  :branch => CURRENT_BRANCH
+
 gem 'fastercsv',  '~> 1.5.4'
 gem 'multi_json', '~> 1.0.3'
 gem 'json',       '~> 1.5.4', :platforms => [ :ruby_18, :jruby ]
 gem 'json_pure',  '~> 1.5.4', :platforms => [ :mswin ]
 
 group :development do
 
-  gem 'dm-validations', DM_VERSION, SOURCE => "#{DATAMAPPER}/dm-validations#{REPO_POSTFIX}"
+  gem 'dm-validations', DM_VERSION,
+    SOURCE  => "#{DATAMAPPER}/dm-validations#{REPO_POSTFIX}",
+    :branch => CURRENT_BRANCH
+
   gem 'jeweler',        '~> 1.6.4'
   gem 'rake',           '~> 0.9.2'
   gem 'rspec',          '~> 1.3.2'
 
 end
@@ -55,20 +62,26 @@
     do_adapters.each do |adapter|
       adapter = 'sqlite3' if adapter == 'sqlite'
       gem "do_#{adapter}", DO_VERSION, do_options.dup
     end
 
-    gem 'dm-do-adapter', DM_VERSION, SOURCE => "#{DATAMAPPER}/dm-do-adapter#{REPO_POSTFIX}"
+    gem 'dm-do-adapter', DM_VERSION,
+      SOURCE  => "#{DATAMAPPER}/dm-do-adapter#{REPO_POSTFIX}",
+      :branch => CURRENT_BRANCH
   end
 
   adapters.each do |adapter|
-    gem "dm-#{adapter}-adapter", DM_VERSION, SOURCE => "#{DATAMAPPER}/dm-#{adapter}-adapter#{REPO_POSTFIX}"
+    gem "dm-#{adapter}-adapter", DM_VERSION,
+      SOURCE  => "#{DATAMAPPER}/dm-#{adapter}-adapter#{REPO_POSTFIX}",
+      :branch => CURRENT_BRANCH
   end
 
   plugins = ENV['PLUGINS'] || ENV['PLUGIN']
   plugins = plugins.to_s.tr(',', ' ').split.push('dm-migrations').uniq
 
   plugins.each do |plugin|
-    gem plugin, DM_VERSION, SOURCE => "#{DATAMAPPER}/#{plugin}#{REPO_POSTFIX}"
+    gem plugin, DM_VERSION,
+      SOURCE  => "#{DATAMAPPER}/#{plugin}#{REPO_POSTFIX}",
+      :branch => CURRENT_BRANCH
   end
 
 end