Noissue - Fix adblockplus::host $ensure = "absent" support

modules/adblockplus/manifests/host.pp

 # == Type: adblockplus::host
 #
 # Manage host information for any node within the Adblock Plus infrastructure.
 #
 # === Parameters:
 #
 # [*ensure*]
 #   Whether to ensure any host-related resources being 'present' or 'absent'.
 #   Note that implicit realization of embedded resources only takes place if
 #   $ensure is 'absent'.
@@ skipping 36 matching lines @@
 #
 #   # Global realization, i.e. when creating a node all others can access
 #   realize(Host<|tag == 'adblockplus::host'|>)
 #   realize(Sshkey<|tag == 'adblockplus::host'|>)
 #
 #   # Addressing (meta-) parameters for re-using their values
 #   $fqdn = getparam(Adblockplus::Host['node1'], 'fqdn')
 #   $primary_ip = getparam(Host['node1'], 'ip')
 #   $key_type = getparam(Sshkey['node1'], 'type')
 #
+#   # Resources associated with 'absent' hosts are always realized
+#   adblockplus::host {'node0':
+#     ensure => 'absent',
+#   }
+#
 define adblockplus::host (
   $ensure = 'present',
   $fqdn = "$name.$adblockplus::authority",
   $groups = [],
-  $ips,
+  $ips = [],
   $public_key = undef,
   $role = undef,
 ) {
 
   include adblockplus
   include stdlib
 
   case $public_key {
 
     undef: {
       $sshkey_ensure = 'absent'
       $sshkey_key = undef
       $sshkey_type = undef
     }
 
     default: {
       $sshkey_ensure = $ensure
       $sshkey = split($public_key, '\s+')
       $sshkey_type = $sshkey[0]
       $sshkey_key = $sshkey[1]
     }
   }
 
   @host {$title:
     ensure => $ensure,
-    ip => pick($ips),
+    ip => pick($ips[0], '0.0.0.0'),
     name => $fqdn,
     tag => ['adblockplus::host'],
   }
 
   @sshkey {$title:
     ensure => $sshkey_ensure,
     host_aliases => $ips,
     key => $sshkey_key,
     name => $fqdn,
     require => File['/etc/ssh/ssh_known_hosts'],
     tag => ['adblockplus::host'],
     type => $sshkey_type,
   }
 
   if $ensure == 'absent' {
     realize(Host[$title])
     realize(Sshkey[$title])
   }
 
   if $::role != undef and manifest_exists("adblockplus::host::$::role") {
     ensure_resource("adblockplus::host::$::role", $title, {name => $name})
   }
 }