Issue #3631 has been updated by Suraj Kurapati.


I submitted this patch directly to the Rake project:

  https://github.com/jimweirich/rake/pull/79

If it is accepted there, then perhaps someday it will
find its way back into ruby-core.  One can only dream. :)
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Feature #3631: [PATCH] lib/rake.rb: allow passing nil to sh() and ruby()
http://redmine.ruby-lang.org/issues/3631

Author: Suraj Kurapati
Status: Assigned
Priority: Normal
Assignee: Nobuyoshi Nakada
Category: lib
Target version: 


=begin
 This patch allows you to pass nil values to Rake's sh() and ruby()
 methods.  This is useful when you want to conditionally pass arguments
 to the child program you are executing.
 
 For example, suppose you want to pass '-v' to a child program if the
 user ran Rake in tracing mode (rake --trace), but not otherwise:
 
   sh 'asciidoc', ('-v' if Rake.application.options.trace), 'input.txt'
 
 Without this patch, you have to carefully construct an arguments array
 so that it does not contain nil values:
 
   args = []
   args << '-v' if Rake.application.options.trace
   args << 'input.txt'
   sh 'asciidoc', *args
 
 Sadly, this becomes very tiresome when performed more than a few times.
 
 Thanks for your consideration.
=end



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