From: Joel VanderWerf <vjoel@...>
Date: 2008-02-26T06:07:38+09:00
Subject: Re: rake task with arguments

Jos Backus wrote:
> On Tue, Feb 26, 2008 at 05:39:57AM +0900, Reacher wrote:
>> All looks well ... until I try to run it:
>>
>> $ rake foo:bar[123]
>> rake: No match
> 
> Try this instead:
> 
>    $ rake 'foo:bar[123]'

Yuck.

FWIW, you can also embed arguments in the task name, which makes the 
command line cleaner. This is yucky in its own special way.

$ cat rakefile
foo_task_pat = /^foo(\w+)$/

make_foo_dep_name =
   proc do |taskname|
     "foo/#{taskname[foo_task_pat, 1]}"
   end

rule foo_task_pat => make_foo_dep_name do |t|
   puts "handling rule for #{t.name.inspect}"
end

directory "foo"

file "foo/bar" => "foo" do
   system "touch foo/bar"
end
$ rm -rf foo
$ rake foobar
(in /home/vjoel/ruby/misc/rake/args)
handling rule for "foobar"
$ ls foo
bar

-- 
       vjoel : Joel VanderWerf : path berkeley edu : 510 665 3407