Puppet Function: systemd::formatkv

Defined in:
functions/formatkv.pp
Function type:
Puppet Language

Overview

systemd::formatkv(Any $section, Any $h) ⇒ Any

Helper function that turns a section + key-value hash into systemd.unit section directives.

Notes:

The section header is included in the output

Empty values are filtered out

Values of type ARRAY are converted to a space-separated string

If the first value presented for a directive is the empty string or
the special string '__RESET__', then the directive is reset by producing
output of the form "Directive=". This syntax is interpreted by systemd
to reset the accumulation of values for this directive, if applicable.

Parameters:

  • section (Any)
  • h (Any)

Returns:

  • (Any) 


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# File 'functions/formatkv.pp', line 17

function systemd::formatkv($section,$h) {

  #
  ## Output section header and append one directive for each KV pair in
  ## the hash. Note: if hash is empty, no output is produced
  #
  $directives = $h.reduce([]) |$memo,$v| {
    $_v = [$v[1]].flatten
    $resetkey = (! empty($_v) and ($_v[0] == '' or $_v[0] == '__RESET__')) ? {
      true    => ["${v[0]}="],
      default => []
    }

    $s = $_v.filter |$a| { !empty($a) and $a != '__RESET__' }.join(' ')
    empty($s) ? { false => $memo + $resetkey + ["${v[0]}=${s}"], true => $memo + $resetkey}
  }

  if empty($directives) { return('') }

  ([ "[${section}]" ] + $directives).join("\n")

}