Class: HieraSimulator::HieraLookup

Inherits:
Object
  • Object
show all
Defined in:
lib/hiera-simulator/hieralookup.rb

Overview

Actually interact with the Hiera gem

Class Method Summary collapse

Class Method Details

.generate_hiera_file(config) ⇒ Object

Generate a temporary hiera configuration file, adjusting for directory paths in a local development environment.

Raises:

  • (Errno::ENOENT) 


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# File 'lib/hiera-simulator/hieralookup.rb', line 23

def self.generate_hiera_file(config)
  hiera_yaml_path = config.get('hiera_yaml_path', '(undefined)')
  raise Errno::ENOENT, "Cannot open hiera_yaml_path '#{hiera_yaml_path}'" unless File.file?(hiera_yaml_path)
  hiera_cfg = YAML.load_file(hiera_yaml_path)

  backends = config.get('backends', hiera_cfg[:backends])
  hiera_cfg[:backends] = backends unless backends == 'preserve'

  if hiera_cfg[:backends].include?('yaml')
    yaml_datadir = config.get('yaml_datadir', nil)
    config.raise_missing_parameter 'yaml_datadir' if yaml_datadir.nil?
    hiera_cfg[:yaml] = { datadir: yaml_datadir }
  end

  if hiera_cfg[:backends].include?('json')
    json_datadir = config.get('json_datadir', nil)
    config.raise_missing_parameter 'json_datadir' if json_datadir.nil?
    hiera_cfg[:json] = { datadir: json_datadir }
  end

  other_backends = hiera_cfg[:backends] - ['yaml','json']
  if other_backends.any?
    STDERR.puts "WARNING: Ignoring unsupported backend(s): #{other_backends.join(', ')}"
    hiera_cfg[:backends] = hiera_cfg[:backends] & ['yaml', 'json']
  end

  hiera_file = Tempfile.new('hiera.yaml')
  hiera_file.write hiera_cfg.to_yaml
  hiera_file.close
  hiera_file.path
end

.lookup(key, config, facts, options = {}) ⇒ Object

Look up a key in hiera

Parameters:

  • key (String) —

    Key to look up

  • config (HieraSimulator::Config) —

    Configuration object

  • verbose (Boolean) —

    Enable verbose mode for hiera



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# File 'lib/hiera-simulator/hieralookup.rb', line 12

def self.lookup(key, config, facts, options = {})
  hiera_tmp_config = generate_hiera_file(config)
  hiera = Hiera.new(config: hiera_tmp_config)
  Hiera.logger = options.fetch(:verbose, false) ? 'console' : 'noop'
  result = hiera.lookup(key, nil, facts, nil, options.fetch(:resolution_type, :priority))
  File.unlink(hiera_tmp_config) if File.file?(hiera_tmp_config)
  result
end