Fail if git ls-files failed

Author: ekohl

lib/puppetlabs_spec_helper/rake_tasks.rb

@@ -324,6 +324,8 @@
   desc 'Fails if directories contain the files specified in .gitignore'
   task :git_ignore do
     matched = `git ls-files --ignored --exclude-standard --cached`
+    raise 'git ls-files failed' unless $CHILD_STATUS.success?
+
     unless matched == ''
       puts matched
       raise 'File specified in .gitignore has been committed'