Use "#!/usr/bin/env rakudo" instead of perl6 in module scripts

[voegelas]

As far as I can see there's no need to put "#!/usr/bin/env perl6" any longer into scripts like cro and zef when these modules are built and installed with recent Rakudo versions. This pull request replaces perl6 with rakudo, perl6-m with rakudo-m etc. in src/core.c/CompUnit/Repository/Installation.pm6.

BTW, if scripts use #!/usr/bin/env the package tool rpmbuild adds automatic dependencies on the package coreutils, which provides /usr/bin/env, instead of rakudo. But that's another issue that I handle in the RPM spec file.

[patrickbkr]

Is #3716 related?

[voegelas]

Is #3716 related?

Sort of. But I think that systems that haven't got /usr/bin/env and only provide /bin/env are non-standard even if no standard defines the exact location. I wouldn't add complex code that supports both /usr/bin/env and /bin/env. Better don't use the env command at all und use the configured prefix to set the interpreter to #!/usr/bin/rakudo, for example. That would also make package tools like rpmbuild and rpmlint happy.

But my pull request isn't about the use of the env command. It just replaces perl6 by rakudo.

[patrickbkr]

Ah. Thanks for the explanation!

Looking good. Do you have permissions to merge this yourself?

[jnthn]

I do wonder if it should have been raku not rakudo, otherwise the installed module scripts are tied to a particular implementation of Raku, rather than whichever one has been installed as raku.

[lizmat]

I think at this stage, where the status of the CompUnit modules is still a bit in question (is it implementation specific or not?), that rakudo is actually the proper thing to do.

[jnthn]

I thought quite a lot of aspects of the CompUnit:: stuff had made it into spectest by now?

[lizmat]

Ah, indeed. Hmmm...

[jnthn]

I did just take a glance through the tests, and I think S11-repository/cur-candidates.t is sort of covering something in this territory.

[voegelas]

raku would require raku-m, raku-j and raku-js command aliases. That's why I replaced perl with raku in most places, but decided to use rakudo in the subst() calls. For example, when zef is installed you get the scripts zef, zef-m, zef-j and zef-js with corresponding shebang lines.