hlindberg

function myjoin(Array $a, String $delimiter) {
  $formats = {
    Array => {
      # no delimiters = '% ', and 'a' means array
      format => '% a',
      separator => $delimiter,
      # format strings without delimiters = '%s'
      string_formats => { String => '%s' }
    }

hlindberg

function mymodule::my_privates (
  Variant[String, Numeric] $key,
  Hash                     $options,
  Puppet::LookupContext    $context,
) {
  case $key {
    'mymodule::secret1' : { Sensitive('There is no Santa on the evening coach') }
    'mymodule::secret2' : { Sensitive('All your base are belong to us') }
    default: { $context.not_found }
  }

hlindberg

<%-
$pin = "release a=${name}" # default value
if $pin_release.length > 0
  $options = [
    if $release.length > 0         { "a=${release}" },
    if $codename.length > 0        { "n=${codename}" },
    if $release_version.length > 0 { "v=${release_version}"},
    if $component.length > 0       { "c=${component}" },
    if $originator.length > 0      { "o=${originator}" },
    if $label.length > 0           { "l=${label}" },

hlindberg

Puppet::Parser::Functions.newfunction(:default_content,
                                      :type => :rvalue,
                                      :doc => <<-'ENDOFDOC'
Takes an optional content and an optional template name and returns the
contents of a file.

Examples:

    $config_file_content = default_content($file_content, $template_location)
    file { '/tmp/x':

hlindberg

# Example of local variables set inside of an EPP template
#

$template = @(EOF)
  <%
    # this is an element with arbitrary puppet code
    $hash = { a => 1, b => 2, c => 3 }
  -%>
  The keys are:
  <%- $hash.each |$key, $value| { -%>

hlindberg

require 'puppet'

# Example of a module setting everything up to perform custom
# validation of an AST model produced by parsing puppet source.
#
module MyValidation
  module Issues
    # (see Puppet::Pops::Issues#issue)
    # This is boiler plate code
    def self.issue (issue_code, *args, &block)

hlindberg

a::x { 
  define b {}
}

should be written (as the 100% equivalent):

class a::x{
}
define a::x::b {

hlindberg

# AbcMetric sample - obviously in the wrong name space...
module Puppet::Pops
module Validation
class AbcMetric

  attr_reader :assignment_count
  def initialize()
    @@abc_visitor       ||= Visitor.new(nil, "abc", 0, 0)

    @assignment_count = 0

hlindberg

Run Agent and Master from source on same machine

bundle exec puppet master --no-daemonize --certname localhost --dns_alt_names localhost --verbose
bundle exec puppet agent -t --certname localhost --server localhost

To re-set the CSR process for an agent:

hlindberg

$data = {
  persons => {
    'Henrik' => {
      mother => 'Anna-Greta',
      father => 'Bengt',
    },
    'Anna-Greta' => {
	  mother => 'Margareta',
	  father => 'Harald',
	  children => ['Henrik', 'Annika']