puppet only exec when file does NOT exist

Question

I only want to exec following command when file (/usr/local/bin/papply) does not exist. not sure what to put there.

    exec { 'git add url':
        command =>'git remote add origin https://github.com/testing/puppet.git',
        require => Exec['git init'],
        cwd => '/home/vagrant/django',
        user => 'vagrant',
        onlyif => "not sure what to put here"
    }

score 23 · Accepted Answer · edited Dec 06 '13 at 14:26

23

Have you tried this?

onlyif => "test ! -f /usr/local/bin/papply"

Not sure if Puppet can use the '!' character

Perhaps a better alternaltive:

creates => '/usr/local/bin/papply'

even if i don't like the fact that the command doesn't really creates the file

edited Dec 06 '13 at 14:26

fredden

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answered Dec 04 '13 at 01:19

sebastien.prudhomme

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not working, got this error message. Could not evaluate: Could not find command '!' – qinking126 Dec 04 '13 at 01:22
And this: onlyif => "test ! -f /usr/local/bin/papply" – sebastien.prudhomme Dec 04 '13 at 01:27
creates => '/usr/local/bin/papply' works, thank you. let me test your updates, see if htat one works. – qinking126 Dec 04 '13 at 01:36
1

onlyif => "test ! -f /usr/local/bin/papply" works, also the one I prefer to use. thank you. – qinking126 Dec 04 '13 at 02:03

score 7 · Answer 2 · edited May 16 '16 at 12:39

7

If you're on linux just do

unless => 'ls /somefile'

ls will return with a non-zero return code if the file does not exist and unless will only let the exec it is under execute if its test returns a non-zero return code.

edited May 16 '16 at 12:39

030

5,901
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answered Dec 05 '13 at 19:29

Adam Henderson

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score 2 · Answer 3 · answered Nov 01 '16 at 05:40

2

On linux and puppet >3.8 try:

exec { 'test':
   command => '/bin/echo HI',
   unless  => 'test -f /a/file.txt',
}

exec will not run if /a/file.txt exists.

answered Nov 01 '16 at 05:40

Felipe Alvarez

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score 0 · Answer 4 · answered May 02 '17 at 16:21

0

You might want to consider using creates, which exists for this purpose:

exec { 'git add url':
  command => 'git remote add origin https://github.com/testing/puppet.git',
  creates => '/usr/local/bin/papply'
}

answered May 02 '17 at 16:21

Philip Kirkbride

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2
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puppet only exec when file does NOT exist

4 Answers4