Get bash / execute output from Chef

foo.chef.rb

#!/opt/chefdk/bin/chef-apply

# Lifted pretty much verbatim from http://stackoverflow.com/questions/17813592/how-can-i-display-the-output-of-a-opscode-chef-bash-command-in-my-console)
results = "/tmp/output.txt"
file results do
  action :delete
end

cmd = "ls  /"
bash cmd do
  code <<-EOH
  #{cmd} &> #{results}
  EOH
end

ruby_block "Results" do
  only_if { ::File.exists?(results) }
  block do
    print "\n"
    print File.read(results)
  end
end

This looks working. This wont work if we want to make decision based on command output . Any ideas around that ??

Depends what you want to do. There's a couple of proper ways forward:

1. Can you do the thing you want to do from bash in Ruby instead? You probably can! That'll be nice and clean.
2. You could abstract your bash bits into a custom resource, and handle the logic there.
3. You can use the returns attribute of the bash resource, to fail your chef run on a bad exit value. https://docs.chef.io/resource_bash.html

Thanks for the suggestion. I will try your approach.