From: Dick Davies <rasputnik@...>
Date: 2008-04-15T00:02:30+09:00
Subject: Rake : conditional logic based on namespaces?

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Hi all

I've got a Rakefile with 2 groups of commands (split into namespaces).

One namespace ('rake show:foo') prints a string, the other 'backticks'
it ("rake run:foo"').

The same functionality is duplicated in each namespace, so much that
the code smells
to high heaven - I'm in danger of 'show' and 'do' getting out of step.

An example might help:

-------------------------------------------------------------------------------
   require 'rake'

   ls = 'ls /tmp'
   date = 'date'

   # show commands
   namespace :show do
       desc 'show command to list /tmp'
       task :ls do
           puts ls
       end

       desc 'show command to print date'
       task :date do
           puts date
       end
   end

   desc 'show commands'
   task :show => ['show:ls', 'show:date']

   # run command
   namespace :run do
       desc 'list /tmp'
       task :ls do
           puts `#{ls}`
       end

       desc 'print date'
       task :date do
           puts `#{date}`
       end
   end

   desc 'run commands'
   task :run => ['run:ls', 'run:date']

-------------------------------------------------------------------------------

There must be someway to prevent duplicating the actual commands to run
(which are a lot more convoluted in reality) - any ideas how?

Thanks a lot.

-- 
Rasputnik :: Jack of All Trades - Master of Nuns
http://number9.hellooperator.net/

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