Puppet stdlib keys() function syntax error

Question

I'm sure I'm doing something silly, but I can't work out the correct syntax for the stdlib keys() function and can't find any examples on the internet.

Here is what I've tried:

file { ["/tmp/file1", "/tmp/file2"]:   # <-- this works as expected
  ensure => present,
}

$hash = {"/tmp/file1" => 1, "/tmp/file2" => 2}
file { keys($hash):                    # <-- syntax error occurs here
  ensure => present,
}

It results in this error:

Error: Could not retrieve catalog from remote server: Error 400 on SERVER: Syntax error at ':'; expected '}' at /etc/puppet/modules/slony/manifests/master.pp:113 on node slonymaster

What am I missing? I'm using Puppet 3.6.2 with stdlib 4.3.2.

Answer 1

You are just overtaxing your expressions. The idea is sound, but you will have to take an intermediate step.

$filenames = keys($hash)
file { $filenames: ensure => present }

Puppet will only accept literal array values or variables as resource titles.