From: Eric Hodel <drbrain@...7.net>
Date: 2006-08-03T03:57:19+09:00
Subject: Re: How to auto-locate interpreter image

On Aug 1, 2006, at 8:15 PM, Scheming Commie wrote:

> On Sat, 15 Jul 2006 21:06:25 +0000, Just Another Victim of the Ambient
> Morality wrote:
>>     I'm pretty sure the "#!" line is meaningless on Windows and  
>> the shell
>> doesn't even bother looking for it.  Indeed, it always struck me a  
>> little
>> weird that every script knows exactly where the interpreter image  
>> is.  What
>> if it were to move?  All your scripts will suddenly break!  An  
>> annoying,
>> albeit, unlikely scenario...
>
> #!/usr/bin/env perl
> #!/usr/bin/env ruby
> .. etc
>
> env finds the interpreter wherever it is and runs it, as you'd expect.
>
> A neat trick, I don't know why it isn't used, well, universally.
>
> Of course it relies on env being in /usr/bin but, that changes less
> (never) than where particular interpreters are.

cron does not set PATH, so scripts with this #! won't work.

-- 
Eric Hodel - drbrain@segment7.net - http://blog.segment7.net
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