[Haskell-cafe] Cabal/cabal-install 1.20 release candidates

[Michal Antkiewicz]

Hi Johan,

Just reporting that everything works for me on Windows 8 with HP 2013.2.0.0
and the included GHC 7.6.3. I was able to build and install our three
projects and all their dependencies (incl. lens, gitit, MissingH,
glpk-hs...) from scratch (I removed Roaming/cabal and Roaming/ghc).

But it wasn't without problems.

With HaXml package: the latest version (1.24.1) no longer compiles with GHC
7.6.3. So when the build failed, I manually cabal installed HaXml-1.24,
which worked, and then I could finish the build of my projects. It would be
good if cabal somehow took into account the lowerbound of the compiler
version required for a package, so that HaXml-1.24.1, for example, could
say it requires ghc >= 7.8.2 and cabal would pick HaXml-1.24 which works
with 7.6.3 instead. Of course, what I have to do now is to specify the
upperbound on HaXml...

Also, sometimes I am getting messages similar to this (it was also
hapenning with 1.18.*):

$ cabal install pandoc-1.11.1
Resolving dependencies...
Failed to install pandoc-1.11.1
Last 10 lines of the build log (
C:\Users\mantkiew\AppData\Roaming\cabal\logs\pandoc-1.11.1.log ):
cabal.exe: C:\Users\mantkiew\AppData\Roaming\cabal\logs\pandoc-1.11.1.log:
does not exist

The file "pandoc-1.11.1.log" indeed does not exist. After I manually create
an empty log file, I get this:

$ cabal install pandoc-1.11.1
Resolving dependencies...
Failed to install pandoc-1.11.1
Last 10 lines of the build log (
C:\Users\mantkiew\AppData\Roaming\cabal\logs\pandoc-1.11.1.log ):
cabal.exe: Error: some packages failed to install:
pandoc-1.11.1 failed while unpacking the package. The exception was:
C:\Users\mantkiew\AppData\Local\Temp\pandoc-1.11.1-4732\pandoc-1.11.1\dist-tmp:
MoveFileEx
"C:\\Users\\mantkiew\\AppData\\Local\\Temp\\pandoc-1.11.1-4732\\pandoc-1.11.1\\dist-tmp"
"C:\\Users\\mantkiew\\AppData\\Local\\Temp\\pandoc-1.11.1-4732\\pandoc-1.11.1\\dist":
permission denied (Access is denied.)

the "pandoc-1.11.1-4732" does not even exit. Of course, on subsequent
attempts, the number is changing after package version. Nothing I tried
worked. The only way out of this is to completely remove the Roaming/cabal
and Roaming/ghc folders and begin from scratch. Then it worked. I wasn't
able to reproduce this behavior -- it seems random. Why would cabal report
access denied for non-existing files/folders?

 Finally,I love the speed (jobs: $ncpus) :-D

Thanks!
Michal

On Tue, Apr 15, 2014 at 8:54 AM, Johan Tibell <johan.tibell at gmail.com>wrote:

> Hi all,
>
> I've prepared the Cabal/cabal-install 1.20 release candidates. I now need
> some help testing, especially on Windows as I don't have a Windows machine.
>
> There are over 300 commits since the last release and lots of interesting
> new features and changes. I will write them down when I make the actual
> release.
>
> To install the release candidates simply run:
>
>     cabal install --constraint="HTTP >= 4000.2.5"
> http://johantibell.com/files/Cabal-1.20.0-rc.tar.gz
> http://johantibell.com/files/cabal-install-1.20.0-rc.tar.gz
>
> (The --constraint="HTTP >= 4000.2.5" flag is used to work around an issue
> I already found in the RC, it won't be needed for the real release.)
>
> Please report any issues on the bug tracker:
> https://github.com/haskell/cabal/issues
>
> If I haven't heard of anything release blocking bugs (or last minute
> important patches) in a couple of days, I will make these tarballs the
> official release.
>
> The commits used are tagged in the repo as Cabal-v1.20.0-rc and
> cabal-install-v1.20.0-rc.
>
> -- Johan
>
>
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>
>
<mantkiew at gsd.uwaterloo.ca>
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