In no purticular order, things that I would like to see:
in reply to Perl6 - Module::Build
- Pure perl is the right decision. For that matter, as far as possible, it should have no external dependencies. (Such as make.)
- I would suggest a design using /lots/ of mix-in modules -- it should be possible to install on a system with win32-ish names for things (.exe, .obj, .dll), but a unixish directory tree, by plugging and playing the approprate modules.
- It should be possible to get lots of metadata without running any free-form code, or it should be possible to run the code within the non-IO playground.
- It should be possible to express a very rich set of dependency information. Most importantly, it should be possible to express dependencies outside of the perl world -- on C-ish libraries, on implementation details, and on OS. ("This library requires pugs on win32 and the library http://www.libsdl.org with a version between 3.1 and 4.")
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