Puppet test and remove an array of files/folders

Question

I'm looking to make the following code work somehow, it seems if i do not test the files/folders first I end up with the error:

Error: Failed to apply catalog: Parameter path failed on File[/opt/dynatrace-6.2]: File paths must be fully qualified, not '["/opt/dynatrace-6.2", "/opt/dynatrace-5.6.0", "/opt/rh/httpd24/root/etc/httpd/conf.d/dtload.conf", "/opt/rh/httpd24/root/etc/httpd/conf.d/01_dtagent.conf"]' at newrelic.pp:35

The pertinent parts

$dtdeps = [
  "/opt/dynatrace-6.2",
  "/opt/dynatrace-5.6.0",
  "${httpd_root}/conf.d/dtload.conf",
  "${httpd_root}/conf.d/01_dtagent.conf",
]

exec { "check_presence":
  require => File[$dtdeps],
  command => '/bin/true',
  onlyif => "/usr/bin/test -e $dtdeps",
}

file { $dtdeps:
  require => Exec["check_presence"],
  path    => $dtdeps,
  ensure  => absent,
  recurse => true,
  purge   => true,
  force   => true,
} ## this is line 35 btw

exec { "stop_dt_agent":
  command => "PID=$(ps ax |grep dtwsagent |grep -v grep |awk '{print$1}') ; [ ! -z $PID ] && kill -9 $PID",
  provider => shell,
}

service { "httpd_restart" :
    ensure    => running,
    enable    => true,
    restart   => "/usr/sbin/apachectl configtest && /etc/init.d/httpd reload",
    subscribe => Package["httpd"],
}

Answer 1

Your code looks basically correct, but you went overboard with your file resources:

file { $dtdeps:
  require => Exec["check_presence"],
  path    => $dtdeps,
  ...

This does create all the file resources from your array (since you use an array for the resource title) but each single one of them will then try to use the same array as the path value, which does not make sense.

TL;DR remove the path parameter and it should Just Work.