Module: RspecPuppetFacts

Defined in:
lib/rspec-puppet-facts.rb,
lib/rspec-puppet-facts/version.rb

Overview

The purpose of this module is to simplify the Puppet module’s RSpec tests by looping through all supported OS’es and their facts data which is received from the FacterDB.

Defined Under Namespace

Modules: Version

Constant Summary collapse

FACTS_CACHE = 
{}

Class Method Summary collapse

Instance Method Summary collapse

Class Method Details

.augeas? ⇒ Boolean

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Determine if the Augeas gem is available. :nocov:

Returns:

  • (Boolean) —

    true if the augeas gem could be loaded.



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# File 'lib/rspec-puppet-facts.rb', line 275

def self.augeas?
  require 'augeas'
  true
rescue LoadError
  false
end

.common_facts ⇒ Hash <Symbol => String>

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

These facts are common for all OS’es and will be added to the facts retrieved from the FacterDB

Returns:

  • (Hash <Symbol => String>) 


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# File 'lib/rspec-puppet-facts.rb', line 252

def self.common_facts
  return @common_facts if @common_facts

  @common_facts = {
    puppetversion: Puppet.version,
    rubysitedir: RbConfig::CONFIG['sitelibdir'],
    rubyversion: RUBY_VERSION,
  }

  @common_facts[:mco_version] = MCollective::VERSION if mcollective?

  if augeas?
    @common_facts[:augeasversion] = Augeas.open(nil, nil, Augeas::NO_MODL_AUTOLOAD).get('/augeas/version')
  end
  @common_facts = stringify_keys(@common_facts) if RSpec.configuration.facterdb_string_keys

  @common_facts
end

.custom_facts ⇒ nil, Hash

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Get custom facts

Returns:

  • (nil, Hash) 


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# File 'lib/rspec-puppet-facts.rb', line 227

def self.custom_facts
  @custom_facts
end

.facter_version_for_puppet_version(puppet_version) ⇒ Object 



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# File 'lib/rspec-puppet-facts.rb', line 391

def self.facter_version_for_puppet_version(puppet_version)
  return Facter.version if puppet_version.nil?

  json_path = File.expand_path(File.join(__dir__, '..', 'ext', 'puppet_agent_components.json'))
  unless File.file?(json_path) && File.readable?(json_path)
    warning "#{json_path} does not exist or is not readable, defaulting to Facter #{Facter.version}"
    return Facter.version
  end

  fd = File.open(json_path, 'rb:UTF-8')
  data = JSON.parse(fd.read)

  version_map = data.map do |_, versions|
    if versions['puppet'].nil? || versions['facter'].nil?
      nil
    else
      [Gem::Version.new(versions['puppet']), versions['facter']]
    end
  end.compact

  puppet_gem_version = Gem::Version.new(puppet_version)
  applicable_versions = version_map.select { |p, _| puppet_gem_version >= p }
  if applicable_versions.empty?
    warning "Unable to find Puppet #{puppet_version} in #{json_path}, defaulting to Facter #{Facter.version}"
    return Facter.version
  end

  applicable_versions.max_by { |p, _| p }.last
rescue JSON::ParserError
  warning "#{json_path} contains invalid JSON, defaulting to Facter #{Facter.version}"
  Facter.version
ensure
  fd.close if fd
end

.facter_version_to_loose_requirement(version) ⇒ Optional[Gem::Requirement]

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Construct the loose facter version requirement

Returns:

  • (Optional[Gem::Requirement]) —

    The version requirement to match



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# File 'lib/rspec-puppet-facts.rb', line 370

def self.facter_version_to_loose_requirement(version)
  string = facter_version_to_loose_requirement_string(version)
  Gem::Requirement.new(string) if string
end

.facter_version_to_loose_requirement_string(version) ⇒ String

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Construct the facter version requirement string

Returns:

  • (String) —

    The version requirement to match



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# File 'lib/rspec-puppet-facts.rb', line 378

def self.facter_version_to_loose_requirement_string(version)
  if (m = /\A(?<major>[0-9]+)\.(?<minor>[0-9]+)(?:\.(?<patch>[0-9]+))?\Z/.match(version))
    # Interpret 3.1 as < 3.2 and 3.2.1 as < 3.3
    "< #{m[:major]}.#{m[:minor].to_i + 1}"
  elsif /\A[0-9]+\Z/.match?(version)
    # Interpret 3 as < 4
    "< #{version.to_i + 1}"
  else # rubocop:disable Style/EmptyElse
    # This would be the same as the strict requirement
    nil
  end
end

.facter_version_to_strict_requirement(version) ⇒ Gem::Requirement

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Construct the strict facter version requirement

Returns:

  • (Gem::Requirement) —

    The version requirement to match



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# File 'lib/rspec-puppet-facts.rb', line 351

def self.facter_version_to_strict_requirement(version)
  Gem::Requirement.new(facter_version_to_strict_requirement_string(version))
end

.facter_version_to_strict_requirement_string(version) ⇒ String

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Construct the strict facter version requirement string

Returns:

  • (String) —

    The version requirement to match



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# File 'lib/rspec-puppet-facts.rb', line 358

def self.facter_version_to_strict_requirement_string(version)
  if /\A[0-9]+(\.[0-9]+)*\Z/.match?(version)
    # Interpret 3 as ~> 3.0
    "~> #{version}.0"
  else
    version
  end
end

.mcollective? ⇒ Boolean

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Determine if the mcollective gem is available :nocov:

Returns:

  • (Boolean) —

    true if the mcollective gem could be loaded.



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# File 'lib/rspec-puppet-facts.rb', line 287

def self.mcollective?
  require 'mcollective'
  true
rescue LoadError
  false
end

.meta_supported_os ⇒ Array<Hash>

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Get the “operatingsystem_support” structure from the parsed metadata.json file in the metadata

Returns:

  • (Array<Hash>)

Raises:

  • (StandardError) —

    if there is no “operatingsystem_support”



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# File 'lib/rspec-puppet-facts.rb', line 301

def self.meta_supported_os
  unless metadata['operatingsystem_support'].is_a? Array
    raise StandardError, 'Unknown operatingsystem support in the metadata file!'
  end

  metadata['operatingsystem_support']
end

.metadata ⇒ Hash

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Read the metadata file and parse its JSON content.

Returns:

  • (Hash)

Raises:

  • (StandardError) —

    if the metadata file is missing



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# File 'lib/rspec-puppet-facts.rb', line 314

def self.metadata
  return @metadata if @metadata
  unless File.file? metadata_file
    raise StandardError, "Can't find metadata.json... dunno why"
  end

  content = File.read metadata_file
  @metadata = JSON.parse content
end

.metadata_file ⇒ String

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

This file contains the Puppet module’s metadata

Returns:

  • (String) 


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# File 'lib/rspec-puppet-facts.rb', line 327

def self.metadata_file
  'metadata.json'
end

.register_custom_fact(name, value, options) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Adds a custom fact to the @custom_facts variable.

Parameters:

  • name (String) —

    Fact name

  • value (String, Proc) —

    Fact value. If proc, takes 2 params: os and facts hash

  • opts (Hash) 


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# File 'lib/rspec-puppet-facts.rb', line 193

def self.register_custom_fact(name, value, options)
  @custom_facts ||= {}
  name = RSpec.configuration.facterdb_string_keys ? name.to_s : name.to_sym
  @custom_facts[name] = { options: options, value: value }
end

.reset ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Reset the memoization to make the saved structures be generated again



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# File 'lib/rspec-puppet-facts.rb', line 342

def self.reset
  @custom_facts = nil
  @common_facts = nil
  @metadata = nil
end

.spec_facts_os_filter ⇒ nil, String

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

If provided this filter can be used to limit the set of retrieved facts only to the matched OS names. The value is being taken from the SPEC_FACTS_OS environment variable and

Returns:

  • (nil, String) 


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# File 'lib/rspec-puppet-facts.rb', line 237

def self.spec_facts_os_filter
  ENV.fetch('SPEC_FACTS_OS', nil)
end

.spec_facts_strict? ⇒ Boolean

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

If SPEC_FACTS_STRICT is set to ‘yes`, RspecPuppetFacts will error on missing FacterDB entries, instead of warning & skipping the tests, or using an older facter version.

Returns:

  • (Boolean) 


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# File 'lib/rspec-puppet-facts.rb', line 244

def self.spec_facts_strict?
  ENV['SPEC_FACTS_STRICT'] == 'yes'
end

.warning(message) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Print a warning message to the console

Parameters:

  • message (String) 


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# File 'lib/rspec-puppet-facts.rb', line 334

def self.warning(message)
  warn message
end

.with_custom_facts(os, facts) ⇒ Hash

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

Adds any custom facts according to the rules defined for the operating system with the given facts.

Parameters:

  • os (String) —

    Name of the operating system

  • facts (Hash) —

    Facts hash

Returns:

  • (Hash) —

    facts Facts hash with custom facts added



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# File 'lib/rspec-puppet-facts.rb', line 205

def self.with_custom_facts(os, facts)
  return facts unless @custom_facts

  @custom_facts.each do |name, fact|
    next if fact[:options][:confine] && !fact[:options][:confine].include?(os)
    next if fact[:options][:exclude] && fact[:options][:exclude].include?(os)

    value = fact[:value].respond_to?(:call) ? fact[:value].call(os, facts) : fact[:value]
    # if merge_facts passed, merge supplied facts into facts hash
    if fact[:options][:merge_facts]
      facts.deep_merge!({ name => value })
    else
      facts[name] = value
    end
  end

  facts
end

Instance Method Details

#add_custom_fact(name, value, options = {}) ⇒ Object

Register a custom fact that will be included in the facts hash. If it should be limited to a particular OS, pass a :confine option that contains the operating system(s) to confine to. If it should be excluded on a particular OS, use :exclude.

Parameters:

  • name (String) —

    Fact name

  • value (String, Proc) —

    Fact value. If proc, takes 2 params: os and facts hash

  • opts (Hash) 


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# File 'lib/rspec-puppet-facts.rb', line 178

def add_custom_fact(name, value, options = {})
  options[:confine] = [options[:confine]] if options[:confine].is_a?(String)
  options[:exclude] = [options[:exclude]] if options[:exclude].is_a?(String)

  RspecPuppetFacts.register_custom_fact(name, value, options)
end

#on_supported_os(opts = {}) ⇒ Hash <String => Hash>

Use the provided options or the data from the metadata.json file to find a set of matching facts in the FacterDB. OS names and facts can be used in the Puppet RSpec tests to run the examples against all supported facts combinations.

The list of received OS facts can also be filtered by the SPEC_FACTS_OS environment variable. For example, if the variable is set to “debian” only the OS names which start with “debian” will be returned. It allows a user to quickly run the tests only on a single facts set without any file modifications.

select facts from, e.g.: ‘3.6’ will be used instead of the “operatingsystem_support” section if the metadata file even if the file is missing.

Parameters:

  • opts (Hash) (defaults to: {})

Options Hash (opts):

  • :hardwaremodels (String, Array<String>) —

    The OS architecture names, i.e. x86_64

  • :supported_os (Array<Hash>) —

    If this options is provided the data

  • :facterversion (String) —

    the facter version of which to

Returns:

  • (Hash <String => Hash>) 


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# File 'lib/rspec-puppet-facts.rb', line 32

def on_supported_os(opts = {})
  opts[:hardwaremodels] ||= ['x86_64']
  opts[:hardwaremodels] = [opts[:hardwaremodels]] unless opts[:hardwaremodels].is_a? Array
  opts[:supported_os] ||= RspecPuppetFacts.meta_supported_os
  opts[:facterversion] ||= RSpec.configuration.default_facter_version

  # This should list all variables that on_supported_os_implementation uses
  cache_key = [
    opts.to_s,
    RspecPuppetFacts.custom_facts.to_s,
    RspecPuppetFacts.spec_facts_os_filter,
    RspecPuppetFacts.spec_facts_strict?,
  ]

  result = FACTS_CACHE[cache_key] ||= on_supported_os_implementation(opts)

  # Marshalling is used to get unique instances which is needed for test
  # isolation when facts are overridden.
  Marshal.load(Marshal.dump(result))
end

#on_supported_os_implementation(opts = {}) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future.

The real implementation of on_supported_os.

Generating facts is slow - this allows memoization of the facts between multiple calls.



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# File 'lib/rspec-puppet-facts.rb', line 59

def on_supported_os_implementation(opts = {})
  unless /\A\d+\.\d+(?:\.\d+)*\z/.match?((facterversion = opts[:facterversion]))
    raise ArgumentError, ":facterversion must be in the format 'n.n' or 'n.n.n' (n is numeric), not '#{facterversion}'"
  end

  filter = []
  opts[:supported_os].map do |os_sup|
    if os_sup['operatingsystemrelease']
      Array(os_sup['operatingsystemrelease']).map do |operatingsystemmajrelease|
        opts[:hardwaremodels].each do |hardwaremodel|
          os_release_filter = "/^#{Regexp.escape(operatingsystemmajrelease.split(' ')[0])}/"
          case os_sup['operatingsystem']
          when /BSD/i
            hardwaremodel = 'amd64'
          when /Solaris/i
            hardwaremodel = 'i86pc'
          when /AIX/i
            hardwaremodel = '/^IBM,.*/'
            os_release_filter = if operatingsystemmajrelease =~ /\A(\d+)\.(\d+)\Z/
                                  "/^#{$~[1]}#{$~[2]}00-/"
                                else
                                  "/^#{operatingsystemmajrelease}-/"
                                end
          when /Windows/i
            hardwaremodel = 'x86_64'
            os_sup['operatingsystem'] = os_sup['operatingsystem'].downcase
            operatingsystemmajrelease = operatingsystemmajrelease[/\A(?:Server )?(.+)/i, 1]

            # force quoting because windows releases can contain spaces
            os_release_filter = "\"#{operatingsystemmajrelease}\""
          when /Amazon/i
            # Tighten the regex for Amazon Linux 2 so that we don't pick up Amazon Linux 2016 or 2017 facts
            os_release_filter = '/^2$/' if operatingsystemmajrelease == '2'
          end

          filter << {
            'os.name' => os_sup['operatingsystem'],
            'os.release.full' => os_release_filter,
            'os.hardware' => hardwaremodel,
          }
        end
      end
    else
      opts[:hardwaremodels].each do |hardwaremodel|
        filter << {
          'os.name' => os_sup['operatingsystem'],
          'os.hardware' => hardwaremodel,
        }
      end
    end
  end

  strict_requirement = RspecPuppetFacts.facter_version_to_strict_requirement(facterversion)

  loose_requirement = RspecPuppetFacts.facter_version_to_loose_requirement(facterversion)
  received_facts = []

  # FacterDB may have newer versions of facter data for which it contains a subset of all possible
  # facter data (see FacterDB 0.5.2 for Facter releases 3.8 and 3.9). In this situation we need to
  # cycle through and downgrade Facter versions per platform type until we find matching Facter data.
  facterversion_key = RSpec.configuration.facterdb_string_keys ? 'facterversion' : :facterversion
  filter.each do |filter_spec|
    versions = FacterDB.get_facts(filter_spec, symbolize_keys: !RSpec.configuration.facterdb_string_keys).to_h do |facts|
      [Gem::Version.new(facts[facterversion_key]), facts]
    end

    version, facts = versions.select { |v, _f| strict_requirement =~ v }.max_by { |v, _f| v }

    unless version
      version, facts = versions.select { |v, _f| loose_requirement =~ v }.max_by { |v, _f| v } if loose_requirement
      next unless version

      raise ArgumentError, "No facts were found in the FacterDB for Facter v#{facterversion} on #{filter_spec}, aborting" if RspecPuppetFacts.spec_facts_strict?

      RspecPuppetFacts.warning "No facts were found in the FacterDB for Facter v#{facterversion} on #{filter_spec}, using v#{version} instead"
    end

    received_facts << facts
  end

  unless received_facts.any?
    RspecPuppetFacts.warning "No facts were found in the FacterDB for: #{filter.inspect}"
    return {}
  end

  os_facts_hash = {}
  received_facts.map do |facts|
    os_fact = RSpec.configuration.facterdb_string_keys ? facts['os'] : facts[:os]
    unless os_fact
      RspecPuppetFacts.warning "No os fact was found in FacterDB for: #{facts}"
      next
    end

    os = "#{os_fact['name'].downcase}-#{os_fact['release']['major']}-#{os_fact['hardware']}"
    next if RspecPuppetFacts.spec_facts_os_filter && !os.start_with?(RspecPuppetFacts.spec_facts_os_filter)

    facts.merge! RspecPuppetFacts.common_facts
    os_facts_hash[os] = RspecPuppetFacts.with_custom_facts(os, facts)
  end

  os_facts_hash
end

#stringify_keys(hash) ⇒ Object

This method is part of a private API. You should avoid using this method if possible, as it may be removed or be changed in the future. 



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# File 'lib/rspec-puppet-facts.rb', line 163

def stringify_keys(hash)
  hash.to_h { |k, v| [k.to_s, v.is_a?(Hash) ? stringify_keys(v) : v] }
end