1 files changed, 33 insertions, 0 deletions
diff --git a/lib/puppet/parser/functions/grep.rb b/lib/puppet/parser/functions/grep.rb
new file mode 100644
index 0000000..ceba9ec
--- /dev/null
+++ b/lib/puppet/parser/functions/grep.rb
@@ -0,0 +1,33 @@
+#
+# grep.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:grep, :type => :rvalue, :doc => <<-EOS
+This function searches through an array and returns any elements that match
+the provided regular expression.
+
+*Examples:*
+
+    grep(['aaa','bbb','ccc','aaaddd'], 'aaa')
+
+Would return:
+
+    ['aaa','aaaddd']
+    EOS
+  ) do |arguments|
+
+    if (arguments.size != 2) then
+      raise(Puppet::ParseError, "grep(): Wrong number of arguments "+
+        "given #{arguments.size} for 2")
+    end
+
+    a = arguments[0]
+    pattern = Regexp.new(arguments[1])
+
+    a.grep(pattern)
+
+  end
+end
+
+# vim: set ts=2 sw=2 et :