How to check if folder has any content in puppet - puppet

Question

What I want to do is check whether a folder has any content before copying the content in the folder, since puppet is throwing an error if you are trying to copy content of a empty folder. This is what I have tried but it doesn't work :(
exec { "Copying_patches_$setupnode-$number":
path => '/usr/local/sbin:/usr/local/bin:/usr/sbin:/usr/bin:/sbin:/bin:/opt/java/bin/',
command => "cp -r ${params::script_base_dir}/libs/patches/* ${params::deployment_target}/$setup/repository/patches/",
onlyif => "test -f ${params::script_base_dir}/libs/patches/*",
notify => Notify['${params::script_base_dir}/libs/patches/* found'],
require => File["${params::deployment_target}/$setupnode"],
}
params::script_base_dir will give the path up to the script location.

Answer 1

Try this approach:
package { 'rsync': ensure => 'installed' }
$from = "${params::script_base_dir}/libs/patches/"
$to = "${params::deployment_target}/$setup/repository/patches/"
file { "$from/.sync_marker": ensure => file }
exec { "Copying_patches_$setupnode-$number":
path => '/usr/bin:/bin',
command => "rsync -r $from $to",
require => [
File["${params::deployment_target}/$setupnode"],
Package['rsync'],
File["$from/.sync_marker"],
],
creates => "$to/.sync_marker",
}
Some remarks:
I shortened your path - no need for java or things in /sbin
Notifying a notify resource is usually no sensible - those always produce their message
The trailing slash on the target does not matter to rsync, but the one on the sources does!
The file in the source directory is created, just to make it possible to build a simple creates clause
The creates parameter makes sure that the command is run only once, and not during every run.
If you need Puppet to wait until the source directory is populated, you do have to use onlyif. Try this condition:
onlyif => "find $from | wc -l | grep -v '^2\$'",
The two lines of output would represent the directory itself and the marker file. The $ sign is escaped so that Puppet includes it in the command string literally.

Answer 2

spent a little bit of time to find it, This might help someone else as well
unless => "find /directory/path/ -mindepth 1 | read",
So wanted
exec { "Install wordpress in ${docroot}":
command => "git clone https://github.com/WordPress/WordPress.git ${docroot}",
unless => "find ${docroot} -mindepth 1 | read", # only cloen if directory is empty
cwd => $docroot,
path => ['/bin', '/usr/bin', '/usr/sbin'],
}