[Haskell-cafe] GHC 6.10.1 and cabal[-install]
duncan.coutts at worc.ox.ac.uk
Tue Nov 18 16:24:58 EST 2008
On Tue, 2008-11-18 at 14:23 +0100, Wolfgang Jeltsch wrote:
> Am Dienstag, 18. November 2008 11:01 schrieb Wolfgang Jeltsch:
> > Hello,
> > I installed GHC 6.10.1 today and expected it to contain the cabal command
> > line utility. Unfortunately, this was not the case. Where can I download
> > it?
> Meanwhile, I found out that the package cabal-install includes the cabal
> command. On the other hand I thought that there was a now deprecated command
> line tool named cabal-install. I find this a bit confusing.
The Cabal package provides the library. The cabal-install package
provides the 'cabal' command line tool.
The deprecated package you're thinking of is cabal-get or cabal-setup.
> > How do I install and configure it so that it is integrated best with
> > GHC 6.10.1? For example, should cabal use some directory in the GHC tree
> > to place compiled packages in?
The defaults for user or global should be fine. There is no need to put
additional packages into the ghc install tree, indeed I would recommend
against doing that.
> Cabal wants to place package info in $HOME/.cabal. However, I want to install
> packages globally with sudo. So I want to have a global package cache. Is
> there a common directory to be used for that or is cabal[-install] only for
> per-user installations?
It can do per-user or global. Per-user is the default.
If you want to do the build as user and just the install as root then
you can use the --global --root-cmd=sudo options. If you want to use
this every time then you can set that in the ~/.cabal/config file.
> Well, there is the --global option but it is apparently only for registering
> packages globally. Does it change the destination directory for the
> installed packages too?
> If yes, to what directory?
> Is the default --global or --user?
> Sorry, but I cannot find the answers to this in the docs and I
> don’t want to mess up my file system.
The cabal user guide lists the default install directories for global
and user installs.
The default ~/.cabal/config file is slightly self-documenting in that it
lists the available options and their defaults:
-- user-install: True
-- prefix: /home/duncan/.cabal
-- prefix: /usr/local
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