1 files changed, 31 insertions, 0 deletions
diff --git a/lib/puppet/parser/functions/regexpescape.rb b/lib/puppet/parser/functions/regexpescape.rb
new file mode 100644
index 0000000..477ee87
--- /dev/null
+++ b/lib/puppet/parser/functions/regexpescape.rb
@@ -0,0 +1,31 @@
+#
+#  regexpescape.rb
+#
+module Puppet::Parser::Functions
+  newfunction(:regexpescape, :type => :rvalue, :doc => <<-EOS
+    Regexp escape a string or array of strings.
+    Requires either a single string or an array as an input.
+    EOS
+  ) do |arguments| # rubocop:disable Style/ClosingParenthesisIndentation
+    raise(Puppet::ParseError, 'regexpescape(): Wrong number of arguments ' \
+      "given (#{arguments.size} for 1)") if arguments.empty?
+
+    value = arguments[0]
+
+    unless value.is_a?(Array) || value.is_a?(String)
+      raise(Puppet::ParseError, 'regexpescape(): Requires either ' \
+        'array or string to work with')
+    end
+
+    result = if value.is_a?(Array)
+               # Numbers in Puppet are often string-encoded which is troublesome ...
+               value.collect { |i| i.is_a?(String) ? Regexp.escape(i) : i }
+             else
+               Regexp.escape(value)
+             end
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :