How to check if a directory exists in puppet

问题

Trying to create an autostart directory on a rpi using puppet. It is supposed to mkdir only if the location doesn't exist.

Here is the current code:

exec { "mkdir_autostart":
command => "mkdir /home/pi/.config/autostart",
unless => "[ -d /home/pi/.config/autostart ]",
path    => "/usr/local/bin/:/bin/",
}

Here is what I get:

err: Failed to apply catalog: Parameter unless failed on Exec[mkdir_autostart]: 
'[ -d  /home/pi/.config/autostart ]' is not qualified and no path was specified.
Please qualify the command or specify a path.

Also tried with onlyif statement, but that generated the same error. What am I doing wrong?

EDIT:

Added path (path => "/usr/local/bin/:/bin/",) and now get:

err: /Stage[main]/auto::Sign/Exec[mkdir_autostart]: Could not evaluate: Could not find command '['

回答1:

You should use the "file" type:

file { "/home/pi/.config/autostart":
   ensure => directory
}

But if for any reason, you want to keep your "exec" type, use test -d /home/pi/.config/autostart

回答2:

Instead of using unless I'd suggest just adding a -p flag to mkdir:

exec { "mkdir_autostart":
  command => "mkdir -p /home/pi/.config/autostart",
  path    => "/usr/local/bin/:/bin/"
}

Or better yet just use Puppet's file resource type as mentioned above by @sebastien.prudhomme.

来源：https://stackoverflow.com/questions/20108694/how-to-check-if-a-directory-exists-in-puppet