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-rw-r--r--lib/puppet/parser/functions/validate_nonemptyarray.rb36
1 files changed, 36 insertions, 0 deletions
diff --git a/lib/puppet/parser/functions/validate_nonemptyarray.rb b/lib/puppet/parser/functions/validate_nonemptyarray.rb
new file mode 100644
index 0000000..f9b3940
--- /dev/null
+++ b/lib/puppet/parser/functions/validate_nonemptyarray.rb
@@ -0,0 +1,36 @@
+module Puppet::Parser::Functions
+
+ newfunction(:validate_nonemptyarray, :doc => <<-'ENDHEREDOC') do |args|
+ Validate that all passed values are array data structures. Abort catalog
+ compilation if any value fails this check. Also abort if any of the arrays
+ is empty.
+
+ The following values will pass:
+
+ $my_array = [ 'one', 'two' ]
+ validate_nonemptyarray($my_array)
+
+ The following values will fail, causing compilation to abort:
+
+ validate_nonemptyarray(true)
+ validate_nonemptyarray([])
+ validate_nonemptyarray('some_string')
+ $undefined = undef
+ validate_nonemptyarray($undefined)
+
+ ENDHEREDOC
+
+ unless args.length > 0 then
+ raise Puppet::ParseError, ("validate_nonemptyarray(): wrong number of arguments (#{args.length}; must be > 0)")
+ end
+
+ args.each do |arg|
+ unless arg.is_a?(Array)
+ raise Puppet::ParseError, ("#{arg.inspect} is not an Array. It looks to be a #{arg.class}")
+ end
+ unless arg.length > 0
+ raise Puppet::ParseError, ("#{arg.inspect} is an empty Array.")
+ end
+ end
+ end
+end