Friday, October 9, 2015

Perl6 and CPAN: MetaCPAN Status as of 2015-10-09

MetaCPAN, like the rest of "CPAN", was built assuming the sole context of Perl5. Which is cool until we want to use it for Perl6 and avoid the troubles associated with different namespaces, dist mgmt, etc... To largely avoid and more easily handle these issues for MetaCPAN it's been suggested that we have separate instances. The existing Perl5 instance only needs to be changed to ignore Perl6 distributions. There has already been some breakage because it didn't ignore a Perl6 dist of mine which exists in the Perl5 world:( And the new Perl6 instance will do just the opposite and only look at Perl6 distributions.

In contrast, and relatedly, on CPAN we've designated a special spot for Perl6 distributions in order to keep them separate from the Perl5 dists. This reserved place is a Perl6 subdir in an author's dir (/author/id/*/*/*/Perl6/). Any dists in or under that spot on the fs will be considered a Perl6 dist; valid or invalid. So this is where the Perl6 MetaCPAN will look and the Perl5 instance will not.

Current development is being done on these temporary branches:


And the main dev instance is running on The web end is at and the api is at

So far the idea has been to iterate on the aforementioned branches and instance until we have something that works sufficiently well. At that point we'll tidy up the branches and submit them for merging. Shortly after that time the hope is that we'll be able to stand up the official Perl6 instance.

The list of requirements for being adequately cooked is:

  1. track Perl6 CPAN dists and ignore Perl5 dists
  2. import a Perl6 distribution
  3. index a Perl6 distribution for search
  4. render pod6 documentation
  5. do Perl6 syntax highlighting

All of these have been hacked in and are at various degrees of completeness. Next up is testing and fixing bugs until nothing major is left. To that end I've recently loaded up the dev instance with all the distributions from The dist files were generated, very hackily, with I also just loaded them all under one user, mine, for simplicity. That load looks like it has problems of its own as well as revealing a bunch of issues. So in the coming days I hope to get that all sorted out.

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