OT: finding every file not in a list

[Chad Perrin]

On Thu, Jan 28, 2010 at 03:13:51AM -0700, Chad Perrin wrote:
> 
>     losers    = Dir["#{Dir.getwd}/**/*"]
>     keepers   = IO.readlines ARGV.shift
>     startpath = ARGV.shift
> 
>     if startpath
>       Dir.chdir startpath
>     end

Oops.  Speaking of using at your own risk . . .

That line that reads `losers    = Dir["#{Dir.getwd}/**/*"]` should be
*after* the conditional block.  Thus, the above quoted code should look
like this instead:

     keepers   = IO.readlines ARGV.shift
     startpath = ARGV.shift
     
     if startpath
       Dir.chdir startpath
     end

     losers    = Dir["#{Dir.getwd}/**/*"]

. . . otherwise you might end up deleting a bunch of files in the wrong
part of the directory hierarchy if you execute the program from somewhere
other than where you want files deleted.  I guess I shouldn't have gotten
fancy and tried to provide a way to execute it from anywhere in the
filesystem.  Sorry about that.

-- 
Chad Perrin [ original content licensed OWL: http://owl.apotheon.org ]
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