Proposal: Changes to the PVP

[Felipe Lessa]

Em 09-04-2014 05:47, Michael Snoyman escreveu:
> I would like to propose the following changes to the PVP. These are the
> same changes that I recently published on the Yesod blog[1]. For more
> information on the motivations behind these changes, please see that
> blog post.
> 
> 1. The goal of the PVP needs to be clarified. Its purpose is not to
> ensure reproducible builds of non-published software, but rather to
> provide for more reliable builds of libraries on Hackage. Reproducible
> builds should be handled exclusively through version freezing, the only
> known technique to actually give the necessary guarantees.
> 
> 2. Upper bounds should not be included on non-upgradeable packages, such
> as base and template-haskell (are there others?). Alternatively, we
> should establish some accepted upper bound on these packages, e.g. many
> people place base < 5 on their code.
> 
> 3. We should be distinguishing between mostly-stable packages and
> unstable packages. For a package like text, if you simply import
> Data.Text (Text, pack, reverse), or some other sane subset, there's no
> need for upper bounds. (Note that this doesn't provide a hard-and-fast
> rule like the current PVP, but is rather a matter of discretion.
> Communication between library authors and users (via documentation or
> other means) would be vital to making this work well.)
> 
> 4. For a package version A.B.C, a bump in A or B indicates some level of
> breaking change. As an opt-in approach, package authors are free to
> associated meaning to A and B beyond what the PVP requires. Libraries
> which use these packages are free to rely on the guarantees provided by
> package authors when placing upper bounds. (Note that this is very
> related to point (3).)
> 
> Discussion period: 3 weeks.
> 
> [1] http://www.yesodweb.com/blog/2014/04/proposal-changes-pvp

Needless to say since I'm mentioned on the blog post, +1.

-- 
Felipe.

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