According to the page on Hackage[0], dataenc is deprecated in favour of 
the sandi[1] package. Unfortunately the API is somewhat different. I'll 
have a look at updating the code now. It looks like it's only used in one 
file at least.

(forgot the links)

[0]: https://hackage.haskell.org/package/dataenc
[1]: https://hackage.haskell.org/package/sandi

I am going to take a stab at that, on the 2.10 branch.

It turned out to be easier than I thought.
The darcs test suite as well as the hashed-storage test suite runs OK.

Attachments

• switch-from-dataenc-_deprecated_-to-sandi.dpatch

Hi Dan,

I recall that switching to sandi was problematic for old GHC versions,
and we want 2.10 to support GHC 7.4.

With which GHC versions did you try your patch?

Guillaume

Hi Guillaume,

I have to admit I didn't try anything older than 7.6

Do you have any advice on building/testing darcs with different GHC
versions?
Do I need several GHC installations and several Cabal sandboxes for that?

On Fri, Oct 9, 2015 at 9:40 PM, Guillaume Hoffmann <guillaumh@gmail.com>
wrote:

> Hi Dan,
>
> I recall that switching to sandi was problematic for old GHC versions,
> and we want 2.10 to support GHC 7.4.
>
> With which GHC versions did you try your patch?
>
> Guillaume
>

Attachments

• unnamed

I've tried this with GHC 7.4, and while sandi 0.3 doesn't work there it seems 
we can loosen the lower bound to include sandi 0.2. I'll send a followup patch 
to change that.

FWIW I use different GHC installations - I used to just install the binary 
tarballs from the GHC website into different directories, though now I use 
NixOS for that.

You should be able to share the same cabal sandbox directory between different 
GHCs as the packages get installed into directories named after the GHC 
version, unless something goes a bit wrong.