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-rw-r--r--lib/puppet/parser/functions/validate_nonemptyhash.rb36
1 files changed, 36 insertions, 0 deletions
diff --git a/lib/puppet/parser/functions/validate_nonemptyhash.rb b/lib/puppet/parser/functions/validate_nonemptyhash.rb
new file mode 100644
index 0000000..9a7b1f6
--- /dev/null
+++ b/lib/puppet/parser/functions/validate_nonemptyhash.rb
@@ -0,0 +1,36 @@
+module Puppet::Parser::Functions
+
+ newfunction(:validate_nonemptyhash, :doc => <<-'ENDHEREDOC') do |args|
+ Validate that all passed values are hash data structures. Abort catalog
+ compilation if any value fails this check. Also abort if any of the hashes
+ is empty.
+
+ The following values will pass:
+
+ $my_hash = { 'one' => 'two' }
+ validate_nonemptyhash($my_array)
+
+ The following values will fail, causing compilation to abort:
+
+ validate_nonemptyhash(true)
+ validate_nonemptyhash([])
+ validate_nonemptyhash('some_string')
+ $undefined = undef
+ validate_nonemptyhash($undefined)
+
+ ENDHEREDOC
+
+ unless args.length > 0 then
+ raise Puppet::ParseError, ("validate_nonemptyhash(): wrong number of arguments (#{args.length}; must be > 0)")
+ end
+
+ args.each do |arg|
+ unless arg.is_a?(Hash)
+ raise Puppet::ParseError, ("#{arg.inspect} is not an Hash. It looks to be a #{arg.class}")
+ end
+ unless arg.keys.length > 0
+ raise Puppet::ParseError, ("#{arg.inspect} is an empty Hash.")
+ end
+ end
+ end
+end