more breakout for feature

lib/shared/runnable.rb

@@ -0,0 +1,23 @@
+module Shared
+
+  module Runnable
+    def run_cmd ( cmd, fallback_branch = current_branch )
+      puts
+      puts cmd
+      success = system cmd
+      unless success
+        system "git checkout #{fallback_branch}"
+        error "(see above)"
+      end
+      puts
+    end
+
+    def error ( msg )
+      puts
+      puts "ERROR: #{msg}"
+      puts
+      exit
+    end
+  end
+
+end