[chef] Re: RE: [Potential SPAM] Re: Help with window_batch conditional?

[Tyler Ball < >]

A ruby_block (https://docs.chef.io/resource_ruby_block.html) is a Chef resource and it can receive notifications or use guards like any other resource.

ruby_block “something only once” do

  block do

    puts “I’m only going to tell you once…”

  end

  only_if { check_prereqs() }

end

If the logic is complicated enough, you can also write your own idempotent resource which only runs when necessary.

-T

On Feb 3, 2015, at 3:38 PM, Fouts, Chris < " class=""> > wrote:

Duh on me, that makes sense.

 

The logging code was just test code. I want to do something real between the do-ends, but only do it once. I want to use chef resources so I’m shying away from ruby_block for this one.

 

Chris

 

From: Daniel Condomitti [ " class="">mailto: ]
Sent: Tuesday, February 03, 2015 6:14 PM
To: " class="">
Subject: [Potential SPAM] [chef] Re: Help with window_batch conditional?

 

The block (code between do/end) is still evaluated, otherwise not_if/only_if wouldn’t fire. cwd/cmd are conditional on the only_if/not_if directives.

 

If you need to run ruby code conditionally (such as logging) use a ruby_block and notifies.

 

On Tuesday, February 3, 2015 at 2:59 PM, Fouts, Chris wrote:

I’m testing logic where I only do one of the windows_batch resource below, but for some reason, I see both logs. Note: I will eventually replace the {true} with a node attribute that I set.

 

What am I missing?

 

windows_batch "FlexnetDB Full Installation" do

  only_if {true}

  Chef::Log.info("

***************************************************

FlexnetDB Full Installation

***************************************************

")

end

 

windows_batch "FlexnetDB Upgrade Installation" do

  not_if {true}

  Chef::Log.info("      

***************************************************

FlexnetDB Upgrade Installation

***************************************************

")

end