On 2011.2.6 11:52 PM, David Golden wrote: >> The change log says this which needs to be discussed. >> >> INCOMPATIBLE CHANGES >> * META and MYMETA files will only be created if CPAN::Meta is >> installed to ensure consistent and valid META file generation >> [David Golden] >> >> Making it an optional dep on CPAN::Meta will silently make META files >> inconsistent on CPAN. I don't have CPAN::Meta installed. If I hadn't looked >> at the change log I likely wouldn't have noticed until somebody told me my >> releases were missing their META files. One of the reasons the META file >> works so well is authors have to do nothing. > > It could be a PREREQ_PM and still skip tests if not installed.
That risks a circular dependency loop which I don't trust CPAN installers, particularly older ones, to gracefully get themselves out of. > That would solve the problem for all but the particular case of a > local::lib bootstrap of a modern EU::MM into a perl before 5.8.9. And > that could be rectified by local::lib also bootstrapping CPAN::Meta > once EU::MM is installed. > >> Here are the options I see. First, make it use CPAN::Meta if available and >> if >> not fall back to a built in one. MakeMaker already has a copy of YAML::Tiny >> in ExtUtils::MakeMaker::YAML. The slightly inconsistent data is better than >> no data at all. > > No. I'm on a campaign to eradicate copies of YAML::Tiny in core and > have Jesse's support for that. We now have CPAN::Meta::YAML and that > is the standard tool to be used by everything that needs it. > >> Another option would be to put CPAN::Meta into inc. Unfortunately, >> CPAN::Meta >> has dependencies. Can they all be put into inc? CPAN::Meta::Tiny? > > Yes, everything can be put into inc. The only tricky one is > version.pm and even that can have a pure-perl version put there. I > haven't tested it that way, but I'm 95% sure it will work. It bloats > EU::MM's dist a bit, but that's the price of backwards compatibilty. META generation has to continue to work, and I agree it would be best to have everything normalize on one thing. I went through the process of bundling up all CPAN::Meta's deps into inc. It's not hard, it's this through the whole tree: export MAKEMAKER_SRC=/path/to/makemaker/src export PERL5LIB=$MAKEMAKER_SRC/lib:$MAKEMAKER_SRC/inc/:$MAKEMAKER_SRC/t/lib perl5.6 Makefile.PL LIB=$MAKEMAKER_SRC/inc/ make test make install I've pushed my work so far into a cpan_meta branch. https://github.com/Perl-Toolchain-Gang/ExtUtils-MakeMaker/commits/cpan_meta I hit a snag on Storable. That isn't core until 5.8 and there's no pure Perl alternative. Something will have to be done about that. Thoughts? -- Stabbing you in the face for your own good.
