Class: LegacyFacter::Util::Confine

Inherits:
Object
  • Object
show all
Includes:
Values
Defined in:
lib/facter/custom_facts/util/confine.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Methods included from Values

convert, deep_freeze, deep_merge, flatten_structure

Constructor Details

#initialize(fact = nil, *values, &block) ⇒ Confine

Add the restriction. Requires the fact name, an operator, and the value we’re comparing to.

Parameters:

  • fact (Symbol) (defaults to: nil) —

    Name of the fact

  • values (Array) —

    One or more values to match against. They can be any type that provides a === method.

  • block (Proc) —

    Alternatively a block can be supplied as a check. The fact value will be passed as the argument to the block. If the block returns true then the fact will be enabled, otherwise it will be disabled.

Raises:

  • (ArgumentError) 


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# File 'lib/facter/custom_facts/util/confine.rb', line 22

def initialize(fact = nil, *values, &block)
  raise ArgumentError, 'The fact name must be provided' unless fact || block_given?
  raise ArgumentError, 'One or more values or a block must be provided' if values.empty? && !block_given?

  @fact = fact
  @values = values
  @block = block
end

Instance Attribute Details

#fact ⇒ Object

Returns the value of attribute fact.



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# File 'lib/facter/custom_facts/util/confine.rb', line 9

def fact
  @fact
end

#values ⇒ Object

Returns the value of attribute values.



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# File 'lib/facter/custom_facts/util/confine.rb', line 9

def values
  @values
end

Instance Method Details

#to_s ⇒ Object 



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# File 'lib/facter/custom_facts/util/confine.rb', line 31

def to_s
  return @block.to_s if @block

  format("'%<fact>s' '%<values>s'", fact: @fact, values: @values.join(','))
end

#true? ⇒ Boolean

Evaluate the fact, returning true or false. if we have a block paramter then we only evaluate that instead

Returns:

  • (Boolean) 


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# File 'lib/facter/custom_facts/util/confine.rb', line 39

def true?
  if @block && !@fact
    begin
      return !!@block.call
    rescue StandardError => e
      log.debug "Confine raised #{e.class} #{e}"
      return false
    end
  end

  unless (fact = Facter[@fact])
    log.debug format('No fact for %<fact>s', fact: @fact)
    return false
  end
  value = convert(fact.value)

  return false if value.nil?

  if @block
    begin
      return !!@block.call(value)
    rescue StandardError => e
      log.debug "Confine raised #{e.class} #{e}"
      return false
    end
  end

  # we're intentionally using case equality (triple equals) because we
  # support matching against anything that supports === such as ranges,
  # regular expressions, etc
  @values.any? { |v| convert(v) === value } # rubocop:disable Style/CaseEquality
end