From: Dov Murik <dov.murik@...>
Date: 2007-03-03T18:01:39+09:00
Subject: Re: ruby equivalent for property or config.xml ?

> YAML is what you want, though parsing properties files into ruby
> hashes is straightforward.

I wondered whether some features of Apache Jakarta Commons Configuration 
format are available with YAML (or another Ruby gismo):

http://jakarta.apache.org/commons/configuration/apidocs/org/apache/commons/configuration/PropertiesConfiguration.html

Two interesting features:

1. Variable expansion:

  user.name = miles
  first_file = /home/${user.name}/first
  app_title = ${user.name}'s homepage

I think variable expansion is done on reference ("lazy"). YAML has 
aliases, but can't concatenate strings (which is OK, because YAML is for 
object (de)serialization...).

2. Layout preservation: The 'load' methods saves the layout of the 
properties file, including comments, line order, indentation. The 'save' 
method tries to preserve as much of it as possible. See:

http://jakarta.apache.org/commons/configuration/apidocs/org/apache/commons/configuration/PropertiesConfigurationLayout.html


Best,
Dov.

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