Re: Mercurial 0.4b vs git patchbomb benchmark

Kyle Moffett
2005-05-02T21:19:15Z

On May 2, 2005, at 12:31:06, Linus Torvalds wrote:
> 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 "$@"

Oooh, I can one-up that hack with this evil from perlrun(1):

#!/bin/sh -- # -*- perl -*- -W -T
eval 'exec perl -wS $0 ${1+"$@"}'
if 0;
# PERL SCRIPT HERE

Description:
Perl ignores the eval($string) because of the "if 0" in the
statement. The
shell sees the statement end at the newline, and executes it faithfully.
The end result is that the preferred Perl gets the script. I don't know
Python, so I don't know if such a trick exists there.

Cheers,
Kyle Moffett

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