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module Puppet::Parser::Functions
newfunction(:getvar, :type => :rvalue, :doc => <<-'ENDHEREDOC') do |args|
Lookup a variable in a remote namespace.
For example:
$foo = getvar('site::data::foo')
# Equivalent to $foo = $site::data::foo
This is useful if the namespace itself is stored in a string:
$datalocation = 'site::data'
$bar = getvar("${datalocation}::bar")
# Equivalent to $bar = $site::data::bar
ENDHEREDOC
unless args.length == 1
raise Puppet::ParseError, ("getvar(): wrong number of arguments (#{args.length}; must be 1)")
end
begin
result = nil
catch(:undefined_variable) do
result = self.lookupvar("#{args[0]}")
end
# avoid relying on incosistent behaviour around ruby return values from catch
result
rescue Puppet::ParseError # Eat the exception if strict_variables = true is set
end
end
end
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