Auto merge of #4342 - bronzdoc:colorize_gem_updates, r=segiddins

Colorize gem updates

closes https://github.com/bundler/bundler/issues/4334
![alt tag](http://i.imgur.com/djHFR95.png)

4 files changed, 9 insertions, 2 deletions

diff --git a/lib/bundler/source.rb b/lib/bundler/source.rb
index 5f1eb130b7..eee4ade45b 100644
--- a/lib/bundler/source.rb
+++ b/lib/bundler/source.rb
@@ -18,7 +18,7 @@ module Bundler
         locked_spec = Bundler.locked_gems.specs.find {|s| s.name == spec.name }
         locked_spec_version = locked_spec.version if locked_spec
         if locked_spec_version && spec.version != locked_spec_version
-          message += " (was #{locked_spec_version})"
+          message += " (#{Bundler.ui.add_color("was #{locked_spec_version}", :green)})"
         end
       end
 
diff --git a/lib/bundler/ui/shell.rb b/lib/bundler/ui/shell.rb
index 425ffae332..1317b1838a 100644
--- a/lib/bundler/ui/shell.rb
+++ b/lib/bundler/ui/shell.rb
@@ -17,6 +17,10 @@ module Bundler
         @warning_history = []
       end
 
+      def add_color(string, color)
+        @shell.set_color(string, color)
+      end
+
       def info(msg, newline = nil)
         tell_me(msg, nil, newline) if level("info")
       end
diff --git a/lib/bundler/ui/silent.rb b/lib/bundler/ui/silent.rb
index 9f387d9e9f..af512eced3 100644
--- a/lib/bundler/ui/silent.rb
+++ b/lib/bundler/ui/silent.rb
@@ -2,6 +2,9 @@
 module Bundler
   module UI
     class Silent
+      def add_color(string, color)
+      end
+
       def info(message, newline = nil)
       end
 
diff --git a/spec/bundler/source_spec.rb b/spec/bundler/source_spec.rb
index 1b4e4bdde9..fc28220c7d 100644
--- a/spec/bundler/source_spec.rb
+++ b/spec/bundler/source_spec.rb
@@ -58,7 +58,7 @@ describe Bundler::Source do
           let(:locked_gem) { double(:locked_gem, :name => "nokogiri", :version => "< 1.5") }
 
           it "should return a string with the spec name and version and locked spec version" do
-            expect(subject.version_message(spec)).to eq("nokogiri >= 1.6 (was < 1.5)")
+            expect(subject.version_message(spec)).to eq("nokogiri >= 1.6 (\e[32mwas < 1.5\e[0m)")
           end
         end
       end