[Haskell-cafe] Inject cabal version or VCS version as a CPP macro

[Eugene Kirpichov]

Thanks, this is exactly what I was looking for!

I might look some more into exposing VCS tags too, however.

On Wed, Feb 22, 2012 at 12:25 PM, Roel van Dijk <vandijk.roel at gmail.com>wrote:

> For each package "myPackage" Cabal generates a module containing,
> among other things, the package's version as a Haskell value:
>
> > import Paths_myPackage ( version )
> > import Data.Version  ( showVersion )
> > main = showVersion version
>
> See also "Accessing data files from package code" in
> http://www.haskell.org/cabal/users-guide/
>
> I do not now how to expose information from the VCS.
>
> 2012/2/22 Eugene Kirpichov <ekirpichov at gmail.com>:
> > Hi,
> >
> > I'd like my program to print something like "this is $program 1.0.4 git
> > 45fea6b" when invoked with --version, or at least just the 1.0.4 part.
> >
> > Can Cabal expose the version as a preprocessor macro by default, or do I
> > have to use Build-Type: Custom and add a preprocessing step of my own?
>



-- 
Eugene Kirpichov
Principal Engineer, Mirantis Inc. http://www.mirantis.com/
Editor, http://fprog.ru/
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