[Nix-dev] lens 4 transition plan?

[Gergely Risko]

Hi Peter,

The build has finished with two failures: Chart and diagrams-core.

For Chart, just changing the dependency to <4.1 instead of <3.11 helped.

For diagrams-core a bit more hackery was needed, attached is a patch to
fix the current issues.  I based this work on
b3c9ad67bcd1c915ea91ab880e61cbdc0c79b610 without investigating deeply,
just fixing the issues as appeared by type and previous changelists.

Sorry for not sending github pull requests, I hope this helps too.

Gergely

-------------- next part --------------
A non-text attachment was scrubbed...
Name: diagrams-core-lens4.patch
Type: text/x-diff
Size: 18978 bytes
Desc: not available
Url : http://lists.science.uu.nl/pipermail/nix-dev/attachments/20140219/2277a8a8/attachment-0001.bin 
-------------- next part --------------


On Wed, 19 Feb 2014 16:45:45 +0100, Peter Simons <simons at cryp.to> writes:

> Hi Gergely,
>
>  > I wanted to ask for your transition plan/timeframe regarding this
>  > change? Do you plan to switch over to lens4 as default sometime and
>  > provide overrides for the not forward compatible packages?
>
> I'm running test builds at [1] right now. If those builds succeed (or
> fail in a way that's easy to fix), then I'll push an update ASAP that
> switches the default version to lens 4.x. Is that alright with everyone?
>
>  > Should we provide patches in nixpkgs where needed to upgrade
>  > everything to lens4 until they're fixed upstream?
>
> Well, if you are aware of a package that won't compile with lens 4.x,
> then yes, please add an appropriate patch. It would be great if we could
> convert all of Nixpkgs to lens 4.x at the same time!
>
>  > As always: thanks for maintaining Haskell in nixpkgs, great job!
>
> Thank you. :-)
>
> Take care,
> Peter
>
> [1] http://hydra.cryp.to/jobset/nixpkgs/haskell-updates