--- /dev/null
+module Puppet::Parser::Functions
+ newfunction(:validate_domain_name, :doc => <<-ENDHEREDOC
+ Validate that all values passed are syntactically correct domain names.
+ Fail compilation if any value fails this check.
+
+ The following values will pass:
+
+ $my_domain_name = 'server.domain.tld'
+ validate_domain_name($my_domain_name)
+ validate_domain_name('domain.tld', 'puppet.com', $my_domain_name)
+
+ The following values will fail, causing compilation to abort:
+
+ validate_domain_name(1)
+ validate_domain_name(true)
+ validate_domain_name('invalid domain')
+ validate_domain_name('-foo.example.com')
+ validate_domain_name('www.example.2com')
+
+ ENDHEREDOC
+ ) do |args|
+
+ rescuable_exceptions = [ArgumentError]
+
+ if args.empty?
+ raise Puppet::ParseError, "validate_domain_name(): wrong number of arguments (#{args.length}; must be > 0)"
+ end
+
+ args.each do |arg|
+ raise Puppet::ParseError, "#{arg.inspect} is not a string." unless arg.is_a?(String)
+
+ begin
+ raise Puppet::ParseError, "#{arg.inspect} is not a syntactically correct domain name" unless function_is_domain_name([arg])
+ rescue *rescuable_exceptions
+ raise Puppet::ParseError, "#{arg.inspect} is not a syntactically correct domain name"
+ end
+ end
+ end
+end