[chef] Re: RE: Is a Chef Resource that returns a boolean value?

["David A. Williams" < >]

Adam,

Yes, that would be helpful! Below is an example of one I'm using to see if a 
user already has the logon on as a service permission which is similar.

powershell_script "Add Log On As A Service Right to #{params[:user]}" do
    code <<-EOH
      #{Dir.tmpdir()}/LogOnAsAService.ps1 -user #{params[:user]} 
-addPermission
    EOH
    only_if{`powershell.exe -ExecutionPolicy RemoteSigned 
#{Dir.tmpdir()}/LogOnAsAService.ps1 -user 
#{params[:user]}`.downcase.include?('has permission = false')}
  end

I'm also messing around with calling helper methods in a module to abstract 
the code a little bit.  This is proving tricky.  I've learned that only class 
module methods work within resources but class module methods don't have 
access to Chef resources.  This part of ruby is new to me but good learning 
experience.

Thank you,
David Williams

From: Adam Edwards 
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Reply-To: 
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Date: Friday, February 7, 2014 2:10 AM
To: 
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<
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<
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Subject: [chef] RE: Is a Chef Resource that returns a boolean value?

Correction: actually, in the example below, the workaround must be inverted, 
so a "!” needs to be added:

    powershell –command "exit [int32](!(get-executionpolicy) -eq 
'remotesigned'))"

-Adam

From: Adam Edwards 
[mailto:
 <mailto:
 >]
Sent: Thursday, February 6, 2014 10:57 PM
To: 
'
 <mailto:
 >'
Subject: RE: [chef] Is a Chef Resource that returns a boolean value?


David, I have a branch in progress that adds this feature to 
powershell_script (if I understand you correctly). See the doc at 
https://github.com/opscode/chef-rfc/blob/adamed/resource-guard/rfc0001-resource-guard.md
 -- it has a link to a branch.



Is this the behavior you'd like to see?



    # What if guards evaluated powershell script code that powershell

    # evaluates as a boolean type as the actual boolean value of the guard

    # itself? You can avoid extra script code to translate the boolean into

    # a process exit code that results in the right true / false behavior

    # for the guard

    powershell_script "set execution policy" do

      code "set-executionpolicy remotesigned"

      not_if "(get-executionpolicy) -eq 'remotesigned'" # Like I barely left 
Ruby -- wow!

    end



The current workaround for the example above is to use an expression like

  powershell –command "exit [int32](get-executionpolicy) -eq 'remotesigned')"



in the not_if above. It basically forces the script to convert a Boolean data 
type to an integer that is then returned as the process exit code, which is 
interpreted by Chef as a Boolean value.



-Adam



-----Original Message-----
From: David A. Williams 
[mailto:
 
Sent: Thursday, February 6, 2014 7:36 PM
To: Chef users
Subject: [chef] Is a Chef Resource that returns a boolean value?



I work with Chef on Windows node and find myself writing a lot of Chef guards 
for the powershell_script resource.  I was wondering if there was a Chef 
resource that returned a boolean value that I could use here.

Thank you,

David Williams



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