Re: Supporting a perl without . in @INC

On 01/16/2017 12:06 PM, Todd Rinaldo wrote:
> All,
>
> Currently in blead is a change that will begin breaking many CPAN
> installs. This is a result of a non-default change to perl builds which
> removes . from @INC. There is currently a separate
> proposal ( https://rt.perl.org/Public/Bug/Display.html?id=130467 )being
> discussed to remove . from @INC by default in 5.26.
>
> More information on the impact of this can also be found
> here. http://blogs.perl.org/users/todd_rinaldo/2016/11/how-removing-from-inc-is-about-to-break-cpan.html
>
> As I understand things, this is the closest thing to a mailing list for
> the toolchain group, so I'm trying this list first.
>
> In order to action RT 130467 without completely breaking CPAN, I propose
> the following patches to CPAN install related modules to fix the problem:
>
> * Inject PERL_USE_UNSAFE_INC=1 into the environment early in the
> following clients. This assures that everything spawned by these clients
> gets . in @INC during test/install.
> CPAN
> CPANPLUS
> App::cpanminus
>
> * Inject PERL_USE_UNSAFE_INC=1 into TAP::Harness to support ad-hoc use
> of prove. (Leon is already working on this)
>
> * Inject PERL_USE_UNSAFE_INC=1 into install modules to try to address as
> many Makefile.PL missing . in @INC issues as possible:
> ExtUtils::MakeMaker
> Module::Build
> Module::Build::Tiny
>
> What at this point I feel is lacking is agreement and/or discussion that
> the above is the correct approach to solving this problem.
>
> If you are not for this plan and/or you are a maintainer of one of the
> above mentioned packages, your response would be appreciated. We're
> running out of time to complete this in time for perl 5.26.
>
> Thanks,
> Todd Rinaldo
>