Add enclose_ipv6 function

Copy a function from puppetlabs/apache, created by Benedikt Bock by
55cc3b4e8f4bc859a1255cb57be2c7923005d822 .

This function enclose IPv6 addresses in square brackets.
It takes an array of ip addresses and encloses the ipv6 addresses with
square brackets.

Co-Authored-By: Benedikt Bock <benedikt_bock@web.de>

1 files changed, 45 insertions, 0 deletions

diff --git a/lib/puppet/parser/functions/enclose_ipv6.rb b/lib/puppet/parser/functions/enclose_ipv6.rb
new file mode 100644
index 0000000..80ffc3a
--- /dev/null
+++ b/lib/puppet/parser/functions/enclose_ipv6.rb
@@ -0,0 +1,45 @@
+#
+# enclose_ipv6.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:enclose_ipv6, :type => :rvalue, :doc => <<-EOS
+Takes an array of ip addresses and encloses the ipv6 addresses with square brackets.
+    EOS
+  ) do |arguments|
+
+    require 'ipaddr'
+
+    rescuable_exceptions = [ ArgumentError ]
+    if defined?(IPAddr::InvalidAddressError)
+	    rescuable_exceptions << IPAddr::InvalidAddressError
+    end
+
+    if (arguments.size != 1) then
+      raise(Puppet::ParseError, "enclose_ipv6(): Wrong number of arguments "+
+        "given #{arguments.size} for 1")
+    end
+    unless arguments[0].is_a?(String) or arguments[0].is_a?(Array) then
+      raise(Puppet::ParseError, "enclose_ipv6(): Wrong argument type "+
+        "given #{arguments[0].class} expected String or Array")
+    end
+
+    input = [arguments[0]].flatten.compact
+    result = []
+
+    input.each do |val|
+      unless val == '*'
+        begin
+          ip = IPAddr.new(val)
+        rescue *rescuable_exceptions
+          raise(Puppet::ParseError, "enclose_ipv6(): Wrong argument "+
+                "given #{val} is not an ip address.")
+        end
+        val = "[#{ip.to_s}]" if ip.ipv6?
+      end
+      result << val
+    end
+
+    return result.uniq
+  end
+end