Re: Mercurial 0.4b vs git patchbomb benchmark

Bill Davidsen
2005-05-03T19:56:40Z

Linus Torvalds wrote:
>
> On Mon, 2 May 2005, Bill Davidsen wrote:
>
>>>-#!/usr/bin/python
>>>+#!/usr/bin/env python
>
>
>>Could you explain why this is necessary or desirable? I looked at what
>>env does, and I am missing the point of duplicating bash normal
>>behaviour regarding definition of per-process environment entries.
>
>
> It's not about environment.
>
> It's about the fact that many people have things like python in
> /usr/local/bin/python, because they compiled it themselves or similar.
>
> Pretty much the only path you can _really_ depend on for #! stuff is
> /bin/sh.
>
> Any system that doesn't have /bin/sh is so fucked up that it's not worth
> worrying about. Anything else can be in /bin, /usr/bin or /usr/local/bin
> (and sometimes other strange places).
>
> That said, I think the /usr/bin/env trick is stupid too. It may be more
> portable for various Linux distributions, but if you want _true_
> portability, you use /bin/sh, and you do something like
>
> #!/bin/sh
> exec perl perlscript.pl "$@"
>
> instead.
> Linus
>
And that eliminates the need for having /usr/bin/env in the "expected"
place. I like it.

Wish there was a way to specify "use path" without all this workaround.

--
-bill davidsen (davidsen@tmr.com)
"The secret to procrastination is to put things off until the
last possible moment - but no longer" -me