ruby script/plugin install git://github.com/peter/server_config.git

Example
=======

Server parameters are configured in a config/server.rb file:

ServerConfig.configure do |c|
  c.param :name => :db_password, :value => "my_db_password",
    :files => ["vendor/plugins/server_config/spec/files/spec_database.yml.example"]
  c.param :name => :payex_merchant_key, :value => "the_merchant_key",
    :files => ["vendor/plugins/server_config/spec/files/merchant.yml"]
  c.param :name => :smtp_password, :value => "my_smtp_password"
end

If you provide the :files option then any occurence of the "__param_name__" (i.e. __db_password__) in those files will be replaced with the param value when you run the rake task server_config:write.
If the extension of the file is .example then the result will be written to a file with the same path but without the .example extension.
If the file does not have the .example extension then replacements are made inline.

Server parameters can be accessed via the global server_param(:param_name) method.

In your Capistrano deploy.rb you might want to do something like this:

desc "Copy in server specific configuration files"
task :setup_config do
  run < :app do
  setup_config
end  

There is currently no advanced documentation for this plugin.