Puppet file vs. URL

pruppet.pp

# Assume a file located at /etc/puppet/environments/development/modules/foo/files/bar/baz.txt
$file_contents = file('foo/bar/baz.txt', '/dev/null')
if $file_contents != '' {
    file { '/tmp/baz.txt':
        content => $file_contents
    }
}
## OR...
$file_url = 'puppet:///modules/foo/bar/baz.txt'
file { '/tmp/baz.txt':
  source => $file_url
}