# According to man 5 apt_preferences:
# The files have either no or "pref" as filename extension
# and only contain alphanumeric, hyphen (-), underscore (_) and period
# (.) characters. Otherwise APT will print a notice that it has ignored a
# file, unless that file matches a pattern in the
# Dir::Ignore-Files-Silently configuration list - in which case it will
# be silently ignored.
$file_name = regsubst($title, '[^0-9a-z\-_\.]', '_', 'IG')

$path = $order ? {
  ''      => "${preferences_d}/${file_name}.pref",
  default => "${preferences_d}/${order}-${file_name}.pref",
}
file { "${file_name}.pref":
  ensure  => $ensure,
  path    => $path,
  owner   => root,
  group   => root,
  mode    => '0644',
  content => template('apt/_header.erb', 'apt/pin.pref.erb'),
}