4 module Puppet::Parser::Functions
5 newfunction(:pick, :type => :rvalue, :doc => <<-DOC
6 This function is similar to a coalesce function in SQL in that it will return
7 the first value in a list of values that is not undefined or an empty string.
8 Typically, this function is used to check for a value in the Puppet
9 Dashboard/Enterprise Console, and failover to a default value like the following:
11 $real_jenkins_version = pick($::jenkins_version, '1.449')
13 The value of $real_jenkins_version will first look for a top-scope variable
14 called 'jenkins_version' (note that parameters set in the Puppet Dashboard/
15 Enterprise Console are brought into Puppet as top-scope variables), and,
16 failing that, will use a default value of 1.449.
21 args.delete(:undefined)
23 raise Puppet::ParseError, 'pick(): must receive at least one non empty value' if args[0].to_s.empty?