I thought the master plan was that less would come with the compiler /
interpreter and the user would install packages using cabal.
Ideally, yes. I think a useful model would be GNU/Linux, where there is
the Linux kernel, developed by core hackers, and then there are
"distributions", which package up particular kernels with a load of
different GNU libraries and utilities to form a complete operating
environment. The maintainers of the distributions do not work on the
kernel, but they do test their own combinations of kernel/libraries +
utilities to ensure that everything plays together nicely.
I would like to see the same separation forming between the ghc compiler
itself (which would minimally include only the small number of libraries
needed to build the compiler), and larger "distributions" which would be
maintained by other people, and include much larger collections of
packages that the maintainer has tested and verified to work together.
In the best of all worlds, a Haskell "distribution" would include
multiple compilers, not just ghc.
i think that such separately maintained distributions would be
one way to avoid the version skew chaos that might otherwise
result from dropping all but the minimal set of libraries from
ghc/hugs/.. distributions. now everybody take a step back to
make room for the volunteers?-)
a slightly more lightweight approach, that could grow into the
above, would be if cabal packages supported nesting/grouping,
so that sets of useful/proven libs could be bundled into a single
package (the whole package builds if all the subpackages build
individually, and form a coherent whole; that is, there'd need to
be tests checking that the subpackages are actually compatible
versions).
then, instead of extra-libs in ghc/hugs/.., there'd be a
standard-libs package on hackage showing exactly which
haskell implementations it builds&tests with successfully and
which not. and one could still get a whole consistent and
maintained? bunch of standard libs in one go.
</dream>
claus
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