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# frozen_string_literal: true
#
# str2bool.rb
#
module Puppet::Parser::Functions
newfunction(:str2bool, type: :rvalue, doc: <<-DOC
@summary
This converts a string to a boolean.
@return
This attempt to convert to boolean strings that contain things like: Y,y, 1, T,t, TRUE,true to 'true' and strings that contain things
like: 0, F,f, N,n, false, FALSE, no to 'false'.
> *Note:* that since Puppet 5.0.0 the Boolean data type can convert strings to a Boolean value.
See the function new() in Puppet for details what the Boolean data type supports.
DOC
) do |arguments|
raise(Puppet::ParseError, "str2bool(): Wrong number of arguments given (#{arguments.size} for 1)") if arguments.empty?
string = arguments[0]
# If string is already Boolean, return it
return string if !!string == string # rubocop:disable Style/DoubleNegation : No viable alternative
raise(Puppet::ParseError, 'str2bool(): Requires string to work with') unless string.is_a?(String)
# We consider all the yes, no, y, n and so on too ...
result = case string
#
# This is how undef looks like in Puppet ...
# We yield false in this case.
#
when %r{^$}, '' then false # Empty string will be false ...
when %r{^(1|t|y|true|yes)$}i then true
when %r{^(0|f|n|false|no)$}i then false
when %r{^(undef|undefined)$} then false # This is not likely to happen ...
else
raise(Puppet::ParseError, 'str2bool(): Unknown type of boolean given')
end
return result
end
end
# vim: set ts=2 sw=2 et :
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