Puppet Function: str2bool
- Defined in:
- puppet/modules/stdlib/lib/puppet/parser/functions/str2bool.rb
- Function type:
- Ruby 3.x API
Overview
This converts a string to a boolean. This attempt to convert 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'.
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# File 'puppet/modules/stdlib/lib/puppet/parser/functions/str2bool.rb', line 6 newfunction(:str2bool, :type => :rvalue, :doc => <<-EOS This converts a string to a boolean. This attempt to convert 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'. EOS ) do |arguments| raise(Puppet::ParseError, "str2bool(): Wrong number of arguments " + "given (#{arguments.size} for 1)") if arguments.size < 1 string = arguments[0] # If string is already Boolean, return it if !!string == string return string end unless string.is_a?(String) raise(Puppet::ParseError, 'str2bool(): Requires ' + 'string to work with') end # 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 /^$/, '' then false # Empty string will be false ... when /^(1|t|y|true|yes)$/i then true when /^(0|f|n|false|no)$/i then false when /^(undef|undefined)$/ then false # This is not likely to happen ... else raise(Puppet::ParseError, 'str2bool(): Unknown type of boolean given') end return result end |