[arch-haskell] Re: [extra] haskell-parallel

[Nicolas Pouillard]

On Thu, 11 Nov 2010 20:02:16 +0100, Peter Hercek <phercek at gmail.com> wrote:
> On 11/11/2010 06:07 PM, Nicolas Pouillard wrote:
> > On Thu, Nov 11, 2010 at 5:59 PM, Peter Hercek<phercek at gmail.com>  wrote:
> >> On 11/11/2010 05:44 PM, Magnus Therning wrote:
> >>> On Thu, Nov 11, 2010 at 16:41, Peter Hercek<phercek at gmail.com>    wrote:
> >>>>
> >>>> Hmm, what we would need is so that when haskell-pandoc is being built
> >>>> it's
> >>>> PKGFILE is updated so that it requires haskell-http 4000.0.9 exactly.
> >>>> Then
> >>>> an attempt to uninstall haskell-hp-http later would require an
> >>>> uninstallation of haskell-pandoc too.
> >>>>
> >>>> Can pacman be forced to do this? We would need something like a new
> >>>> option
> >>>> in PKGFILE which would have meaning: "fix versions of dependencies of
> >>>> these
> >>>> packages exactly to the versions which are currently installed (installed
> >>>> during building)."
> >>> Just for reference, this is basically what the Debian policy on
> >>> Haskell packages is.
> >>>
> >> Good policy, if they can have it automated. If pacman (or I should rather
> >> say makepkg) has such a option then great. If not we should check whether we
> >> can add it there. We want the final exact version for dependency to be fixed
> >> during build time. The PKGBUILD files need to contain the version ranges as
> >> the cabal files.
> >>
> >> If we cannot have this late version fix during makepkg then I say just let
> >> it be as it is. If a user wants to go into the troubles with the source
> >> packages then he/she should be able to take care about knowing and obeying
> >> the haskell quirks.
> >>
> >> Well maybe we could try to provide a small wraper over makepkg (something
> >> like haskell-makepkg) which should be used for haskell source packages ...
> >> if we cannot get this fixed in the makepkg itself.
> > A few weeks I hacked makepkg to add this very feature, I didn't took
> > time to test
> > it exhaustively nor to propose it to the authors.
> >
> > As an attachment here is a diff against the makepkg found in pacman-3.4.1-1,
> > it adds the --freeze-deps flag that change the package versions to be exactly
> > the one on the build system.
> >
> > I would be glad to see this feature used here, and then proposed to the authors
> > on the behalf of the Arch-Haskell team.
> 
> I did not test it, but it looks like it fixes all dependencies or none. 
> That is not what would be good for us. We want to fix only haskell 
> dependencies. We typically do not want to freeze dependencies on C libs 
> (e.g. in the case of gtk2hs we do not want freeze our dependency on gtk 
> exactly).
> 
> So something like a possibility to add a line like this to PKGBUILD file 
> would be fine:
> FREEZEDEPS=('haskell-http' 'haskell-pandoc')
> or better something like:
> FREEZEDEPS_REGEX=('haskel-hp-.*' 'haskell-.*')

Indeed this was a really rough hack. But has you've seen a very small one
as well. My motivation was to share binary packages built from AUR
(where dependencies are often loosy), and see when an upgrade wants to
break my packages.

-- 
Nicolas Pouillard
http://nicolaspouillard.fr