On Sat, Jul 25, 2009 at 11:25:12PM -0700, Donald Bruce Stewart wrote:
> johan.tibell:
> >
> > In general, I think it would be a good idea to provide some statistics of
> > how
> > many packages would break as the result of a backwards incompatible change.
>
> Agreed. And it should be required as part of release processes for GHC.
>
> Duncan has described the process of building large amounts of Hackage,
>
> http://blog.well-typed.com/2009/03/regression-testing-with-hackage/
That process requires too much effort. IIRC it took more than a day of
actual human time to get the package list set up etc, and requires you
to make some non-obvious decisions along the way.
I think a better process would be more along the lines of:
for p in $packages
cabal install p
rollback?
except smarter, so that it doesn't try to install packages that it has
already installed as a dependency of something else.
Thanks
Ian
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