Cabal problem re. haskelldb-hdbc-mysql

[Yves Parès-3]

Hi,
the package http://hackage.haskell.org/package/haskelldb-hdbc-mysql/ the use of HDBC <2.3.0
I'm using cabal-install 0.14, and with a fresh install (no packages already installed), cabal-install tries to install HDBC-2.1.1 instead of, say, HDBC-2.2.7.0.

The problem is that HDBC-2.1.1 is old (2009) and does not compile.

When I download haskelldb-hdbc-mysql manually, change the dependency and then install, it compiles fine.

Is the dependency ill-declared, or is that a cabal problem?

_______________________________________________
Haskell-Cafe mailing list
[hidden email]
http://www.haskell.org/mailman/listinfo/haskell-cafe

[Nicolas Wu]

On Wed, Jul 4, 2012 at 3:58 PM, Yves Parès <[hidden email]> wrote:

> Hi,
> the package http://hackage.haskell.org/package/haskelldb-hdbc-mysql/ the use
> of HDBC <2.3.0
> I'm using cabal-install 0.14, and with a fresh install (no packages already
> installed), cabal-install tries to install HDBC-2.1.1 instead of, say,
> HDBC-2.2.7.0.
>
> The problem is that HDBC-2.1.1 is old (2009) and does not compile.
>
> When I download haskelldb-hdbc-mysql manually, change the dependency and
> then install, it compiles fine.
>
> Is the dependency ill-declared, or is that a cabal problem?

Apart from the change of license, there were no serious changes to the
HDBC interface between the 2.2.* and 2.3.* series: as far as I know,
it should be fine to change the dependency. That said, I've not worked
with haskelldb-hdbc-mysql, so I can't say for sure.

_______________________________________________
Haskell-Cafe mailing list
[hidden email]
http://www.haskell.org/mailman/listinfo/haskell-cafe

[Albert Y. C. Lai]

On 12-07-04 10:58 AM, Yves Parès wrote:
> the package http://hackage.haskell.org/package/haskelldb-hdbc-mysql/ the
> use of HDBC <2.3.0
> I'm using cabal-install 0.14, and with a fresh install (no packages
> already installed), cabal-install tries to install HDBC-2.1.1 instead
> of, say, HDBC-2.2.7.0.

HDBC 2.2.* all want time>=1.1.2.4 && <=1.2.0.3, GHC 7.4.1 comes with
time-1.4, therefore HDBC 2.2.* are all rejected. 2.1.1 is the topmost
one without the upper bound.

This analysis is made possible by "cabal install --dry-run -v3
haskelldb-hdbc-mysql" of cabal-install 0.14. Now with actually relevant
output! (As part of the new "modular" solver, I guess.)

P.S. haskelldb-hdbc wants mtl-2.0.*, but you already have mtl-2.1
because you have cabal-install 0.14. mtl-2.0.1.0 in turn wants
transformers-0.2.*, but you already have transformers-0.3.0.0 again
because you have cabal-install 0.14. Expect mysterious problems in the
future.


_______________________________________________
Haskell-Cafe mailing list
[hidden email]
http://www.haskell.org/mailman/listinfo/haskell-cafe