On 26 February 2014 23:25, Herbert Valerio Riedel
On 2014-02-26 at 13:09:37 +0100, Michael Snoyman wrote:
[...]
+1. If we're discussing PVP changes, the other one I'd like to propose is:
Don't include upper bounds on base, template-haskell, or other libraries which cannot be upgraded, unless you know with certainty that your package will not compile with those other versions. Motivation:
* The bounds will never help cabal choose a better build plan.
...this assumes (as I mentioned in an earlier post) that GHC is never going to ship again with two versions of base (like in the past with base3/4). For that case, we'd want at least something like `base < 5` as upper bound in place (with the policy that `5.*` will only ever be reached if something really disruptive is done to `base`)
Agreed; there were a few packages that failed on Gentoo because the author stated that it worked with "base < 5", even though they'd only tested it with cabal-install and at the time it was defaulting to base-3 (though using the runhaskell Setup.hs method used the "best version"). That might be reasonable for the other such libraries though. But to be specific: are we including libraries such as bytestring, containers, etc. as those that can be upgraded or cannot be upgraded? -- Ivan Lazar Miljenovic Ivan.Miljenovic@gmail.com http://IvanMiljenovic.wordpress.com