Work around bundler deploy

gistfile1.txt

ubuntu@dob2-bach-r4an07:~/chef-bach$ git show 8ce3830c8624a179662d71d1abf74ed320fddd9f
commit 8ce3830c8624a179662d71d1abf74ed320fddd9f
Author: Clay Baenziger <cbaenziger@bloomberg.net>
Date:   Sun Jul 16 18:44:01 2017 -0400

    Check if bach_repo Gemfile.lock is committed

diff --git a/cookbooks/bach_repository/recipes/gems.rb b/cookbooks/bach_reposito
index e1ca4b6..7ebbcc2 100644
--- a/cookbooks/bach_repository/recipes/gems.rb
+++ b/cookbooks/bach_repository/recipes/gems.rb
@@ -46,14 +46,19 @@ end
 # it is run on an internet-disconnected host only to verify the
 # extracted package is complete.
 #
-# This ruby_block checks for the presence of a Gemfile.lock in order
+# This ruby_block checks for the presence of a Gemfile.lock on the file
+# system and in the Git repo (as required by Bundler) in order
 # to determine which scenario applies, then append a --deployment
 # switch in the latter case.
 #
 ruby_block 'determine-bundler-command' do
   block do
-    if File.exists?(File.join(node['bach']['repository']['repo_directory'],
-                              'Gemfile.lock'))
+    gemfile_lock_path = File.join(node['bach']['repository']['repo_directory'],
+                          'Gemfile.lock')
+    gemfile_lock_cmd = Mixlib::ShellOut.new('git', 'diff', '--name-status',
+                                            gemfile_lock_path)
+    gemfile_lock_cmd.run_command
+    if File.exists?(gemfile_lock_path) && !gemfile_lock_cmd.error?
       node.run_state[:bcpc_bootstrap_bundler_command] =
         "#{bundler_bin} install --deployment"
     else