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cpan-common.md

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conceptual CPAN pipeline

$ cpan-lookup    Foo::Bar                    => JDOE/Foo-Bar-1.23.tar.gz

$ cpan-get       JDOE/Foo-Bar-1.23.tar.gz    => /tmp/Foo-Bar-1.23.tar.gz

$ cpan-expand    $tmp_tarball                => setup dir

$ cpan-configure $tmp_dir                    => MYMETA.json

$ cpan-prereqs   --missing MYMETA.json       => @modules/@dists XXX

$ cpan-build     $tmp_dir                    => $tmp_dir

$ cpan-test      $tmp_dir                    => $tmp_dir

$ cpan-stage     $tmp_dir                    => $tmp_dir
(install into $stage/phase/type/blib/... ?!)

$ cpan-install   $phase $type
(can't take just from XXX ?)
things might have custom installation XXX

Stage: core vs. site vs. vendor vs. local::lib (all possible at once?)

CPAN::Context

  • hold + dispatch to objects?
  • or retrieve objects?

Q: what's the necessary context needed by Distribution object

  • feedback callbacks on progress
  • depends how much Distributions process dependency resolution process vs. rely on external query XXX

cpan> install Foo::Bar

  1. request install for Foo::Bar [Queue]

  2. resolve Foo::Bar to LOCAL/Foo-Bar-1.23.tar.gz [Index]

  3. Check if L/FB exists in Dist Obj Cache [Session]

    (if so, get it + jump to 8)

  4. get L/FB fron a CPAN mirror to a local cache [Client]

  5. uncompress it to a directory [TarZip]

  6. create DistObject [Dist]

  7. register DistObject in cache [Session]

  8. check config-requires [Dist]

    if no config-requires, jump to ...