add suffix function to accompany the prefix function

1 files changed, 45 insertions, 0 deletions

diff --git a/lib/puppet/parser/functions/suffix.rb b/lib/puppet/parser/functions/suffix.rb
new file mode 100644
index 0000000..5018280
--- /dev/null
+++ b/lib/puppet/parser/functions/suffix.rb
@@ -0,0 +1,45 @@
+#
+# suffix.rb
+#
+
+module Puppet::Parser::Functions
+  newfunction(:suffix, :type => :rvalue, :doc => <<-EOS
+This function applies a suffix to all elements in an array.
+
+*Examples:*
+
+    suffix(['a','b','c'], 'p')
+
+Will return: ['ap','bp','cp']
+    EOS
+  ) do |arguments|
+
+    # Technically we support two arguments but only first is mandatory ...
+    raise(Puppet::ParseError, "suffix(): Wrong number of arguments " +
+      "given (#{arguments.size} for 1)") if arguments.size < 1
+
+    array = arguments[0]
+
+    unless array.is_a?(Array)
+      raise(Puppet::ParseError, 'suffix(): Requires array to work with')
+    end
+
+    suffix = arguments[1] if arguments[1]
+
+    if suffix
+      unless suffix.is_a?(String)
+        raise(Puppet::ParseError, 'suffix(): Requires string to work with')
+      end
+    end
+
+    # Turn everything into string same as join would do ...
+    result = array.collect do |i|
+      i = i.to_s
+      suffix ? i + suffix : i
+    end
+
+    return result
+  end
+end
+
+# vim: set ts=2 sw=2 et :