[Haskell-cafe] some problem with Cabal

[qiqi]

Daniel Fischer wrote:
> 
> On Wednesday 09 March 2011 02:51:35, qiqi wrote:
>> I used cabal install xmobar --flags="all_extensions" .
> 
> Whoa:
> 
> In order, the following would be installed:
> containers-0.3.0.0 (new version)
> filepath-1.1.0.4 (new version)
> directory-1.1.0.0 (reinstall) changes: filepath-1.2.0.0 -> 1.1.0.4
> hinotify-0.3.1 (new package)
> mtl-1.1.1.1 (new version)
> network-2.2.1.10 (new version)
> process-1.0.1.5 (reinstall) changes: filepath-1.2.0.0 -> 1.1.0.4
> stm-2.2.0.1 (new package)
> syb-0.3 (new package)
> X11-1.5.0.0 (new package)
> time-1.1.4 (new version)
> random-1.0.0.3 (reinstall) changes: time-1.2.0.3 -> 1.1.4
> haskell98-1.1.0.1 (reinstall)
> utf8-string-0.3.6 (new package)
> X11-xft-0.3 (new package)
> libmpd-0.5.0 (new package)
> xmobar-0.12 (new package)
> 
> I haven't looked further, but libmpd is at least partially responsible, it 
> depends on filepath < 1.2, time < 1.2 and a couple other old packages.
> 
>> Is it true that every package installed from hackage should not install
>> any package, which already exists in the global with the same version
>> number , in the local db?
> 
> Generally, it shouldn't (and doesn't), but here some packages have to be 
> reinstalled because they have to be built against different dependencies.
> 
> I'd prefer cabal install to refuse here (overridable with a --force flag) 
> because reinstalling boot libs (containers, filepath, directory, process, 
> time) tends to be a bad idea.
> 
> However, xmobar is an executable and no library, so if you unregister the 
> packages (from the user db!) after installing before they can cause 
> trouble, you should be fine (but no guarantees).
> 
> This is exactly what I am doing. I unregistered those packages but kept
> the xmobar's executable under ~/.cabal/bin. It works fine.
> 
> Thanks Daniel. I appreciate it!
> 
> _______________________________________________
> Haskell-Cafe mailing list
> Haskell-Cafe at haskell.org
> http://www.haskell.org/mailman/listinfo/haskell-cafe
> 


--
View this message in context: http://haskell.1045720.n5.nabble.com/some-problem-with-Cabal-tp3414662p3414954.html
Sent from the Haskell - Haskell-Cafe mailing list archive at Nabble.com.