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-rw-r--r--lib/puppet/parser/functions/regexpescape.rb31
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 :