Re: Explicit interpreter paths considered harmful

[Eric Blake]

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According to Jim Meyering on 10/30/2009 2:52 AM:
> FYI, this appears to work, both when invoked directly, and when invoked
> as "perl gitlog-to-changelog ...", but I'm still on the fence...
> Is it worth the ugliness, when invoking with $(PERL) is so easy, and
> when the recommended usage is not to run them from the command line.
> 
> diff --git a/build-aux/gitlog-to-changelog b/build-aux/gitlog-to-changelog
> index a0f8a08..7f1880c 100755
> --- a/build-aux/gitlog-to-changelog
> +++ b/build-aux/gitlog-to-changelog
> @@ -1,7 +1,9 @@
> -#!/usr/bin/perl
> +eval '(exit $?0)' && eval 'exec perl -wS "$0" ${1+"$@"}'
> +  & eval 'exec /usr/bin/perl -wS "$0" $argv:q'
> +    if 0;

Wow.  That does start to get hairy.  But I think a script that can be run
by both $(PERL) script and by ./script is worth the patch.  Why?  Because
we should (eventually) support ./script --help, in case someone wonders
why we included the script as part of the tarball and doesn't realize that
it is normally a maintainer-only tool.

- --
Don't work too hard, make some time for fun as well!

Eric Blake             address@hidden
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