Displays the previous version of the gem when run bundle update

Change code in the 3 source files to display the method locked_gems in
lib/bundler.rb

Add 3 Rspec test in the update directory for each source: rubygems, git,
path.

1 files changed, 11 insertions, 1 deletions

diff --git a/lib/bundler/source.rb b/lib/bundler/source.rb
index c75599f4..2a7f0944 100644
--- a/lib/bundler/source.rb
+++ b/lib/bundler/source.rb
@@ -1,7 +1,17 @@
 module Bundler
-  module Source
+  class Source
     autoload :Rubygems, 'bundler/source/rubygems'
     autoload :Path, 'bundler/source/path'
     autoload :Git, 'bundler/source/git'
+
+    def version_message(spec)
+      locked_spec = Bundler.locked_gems.specs.find { |s| s.name == spec.name } if Bundler.locked_gems
+      locked_spec_version = locked_spec.version if locked_spec
+      message = "#{spec.name} (#{spec.version})"
+      old_version = " was (#{locked_spec_version})"
+      message << old_version if locked_spec_version && spec.version != locked_spec_version
+      message
+    end
+
   end
 end