path: root/lib
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authorGiulio Fidente <gfidente@redhat.com>2016-05-23 21:09:21 +0200
committerGiulio Fidente <gfidente@redhat.com>2016-05-25 23:55:44 +0200
commit4e5ebf3ad86b79710784f3c27a611ec436c4ba76 (patch)
treed698454072979138b8def984492eaf5d0686f418 /lib
parent73a687263c38e85344bbab3a3536873f8285322d (diff)
Add lookup_hiera_hash function
The lookup_hiera_hash function is meant to lookup for the value of a given key from a given Hiera hash. In the manifests this is possible by saving the value of the hash in a variable first but when driving lookups from the Heat templates we can't do it. Change-Id: Ie31bb70314db44a0a18e86090cc74aa4df5de169
Diffstat (limited to 'lib')
1 files changed, 22 insertions, 0 deletions
diff --git a/lib/puppet/parser/functions/lookup_hiera_hash.rb b/lib/puppet/parser/functions/lookup_hiera_hash.rb
new file mode 100644
index 0000000..d96d65f
--- /dev/null
+++ b/lib/puppet/parser/functions/lookup_hiera_hash.rb
@@ -0,0 +1,22 @@
+module Puppet::Parser::Functions
+ newfunction(:lookup_hiera_hash, :arity => 2, :type => :rvalue,
+ :doc => "Lookup a key->value from a Hiera hash") do |args|
+ hash_name = args[0]
+ key_name = args[1]
+ unless hash_name.is_a?(String) and key_name.is_a?(String)
+ raise Puppet::ParseError, "The hash name and the key name must be given as strings."
+ end
+ if defined? call_function
+ hash = call_function('hiera', [hash_name])
+ else
+ hash = function_hiera([hash_name])
+ end
+ unless hash.is_a?(Hash)
+ raise Puppet::ParseError, "The value Hiera returned for #{hash_name} is not a Hash."
+ end
+ unless hash.key?(key_name)
+ raise Puppet::ParseError, "The Hiera hash #{hash_name} does not contain key #{key_name}."
+ end
+ return hash[key_name]
+ end