Re: difftool uses hardcoded perl shebang

From: Jeff King <peff@peff.net>
Date: Dec 19, 2017, 16:25 UTC
Message-ID: <20171219162528.GA5804@sigill.intra.peff.net>
In-Reply-To: <f5d4c8e7bceb410a95a34a8cce4c31dd@deutsche-boerse.com>

On Tue, Dec 19, 2017 at 01:28:09PM +0000, Jakub Zaverka wrote:

Show 12 quoted lines

> When running git difftool:
> 
> >git difftool
> Perl lib version (5.10.0) doesn't match executable version (v5.16.3)
> Compilation failed in require at <path>/git-difftool line 2.
> 
> First line in my git-difftool is:
> #!/usr/bin/perl
> 
> I am using a specific perl that I cannot change. Similarly, I cannot change the git-difftool file. I would like the difftool to use the perl form my PATH. 
> 
> Maybe it would be better to use #!/usr/bin/env perl?

This is a build-time knob. When you build git, try:

  make PERL_PATH='/usr/bin/env perl'

(If you don't build your own git, then you might raise the issue with whomever packages your binary).

As an aside, git-difftool is now a C builtin these days, so the problem might also go away if you upgrade. ;)

-Peff