Remove the "running under some shell" madness.

[schwern]

MakeMaker changes the #! line to match the installed Perl, which is good, but it also adds in this:

#!/path/to/bin/perl

eval 'exec /path/to/bin/perl -w -S $0 ${1+"$@"}'
    if 0; # not running under some shell

This exists to fix systems which do not honor the #! line and instead execute the file with the shell. Really, really old and really, really broken Unixes. I doubt modern MakeMaker still works on them, so I'm happy to see this historical oddity removed. One less bizarre thing to explain.

[shadowcat-mst]

On Tue, Oct 16, 2012 at 05:05:12PM -0700, Michael G. Schwern wrote:

MakeMaker changes the #! line to match the installed Perl, which is good

Not for relocatable perls it isn't.

If we're going to change the mangling at all, can we change it so that it's
possible to ask for '#!/usr/bin/env perl' too please?

(the possibility of this might even make me care enough to help ;)

Matt S Trout - Shadowcat Systems - Perl consulting with a commit bit and a clue

http://shadowcat.co.uk/blog/matt-s-trout/ http://twitter.com/shadowcat_mst/

Email me now on mst (at) shadowcat.co.uk and let's chat about how our Catalyst
commercial support, training and consultancy packages could help your team.

[schwern]

On 2012.10.17 4:27 AM, shadowcat-mst wrote:

On Tue, Oct 16, 2012 at 05:05:12PM -0700, Michael G. Schwern wrote:

MakeMaker changes the #! line to match the installed Perl, which is good

Not for relocatable perls it isn't.

Separate issue please, thank you.

[mcandre]

+1 #!/usr/bin/env <language> is the only ideal shebang, and <language> <script> is the ideal way to execute programs.

[Leont]

+1 #!/usr/bin/env <language> is the only ideal shebang

Until you have multiple installs of the same language, and env doesn't know which one to choose.

and <language> <script> is the ideal way to execute programs.

Until you get an error "Can't locate Foo.pm in @inc (you may need to install the Foo module)"

[mcandre]

Hmm, what's the closest thing Perl has to Ruby's Bundler RVM for managing multiple, simultaneously instlalled versions?

[miyagawa]

Carton (https://github.com/miyagawa/carton) is to Perl what Bundler is to
Ruby, however it is not to "manage multiple simultaneously installed
versions (of perl)". That is done by perlbrew or plenv (rvm/rbenv if you'd
like to compare with Ruby's equivalents).

Tatsuhiko Miyagawa

[mohawk2]

Is this issue still undecided?

[schwern]

Since there was no Great Cry Of Protest (relocatable Perl is a separate issue) I would say it's safe to remove. Then we'll see if we get a Great Cry Of Protest from Ye Olde Unix Users.

[mohawk2]

Make it so ;-)

[dolmen]

@mcandre See plenv.

[mohawk2]

So that I'm clear: @schwern, are you saying you're content for me to remove the "running under some shell" stuff?

[schwern]

Fine by me. @bingos, any protest?

[bingos]

I am happy if you are happy.