[Nix-dev] [PATCH] Enable freetype support in xmobar using PostProcess.hs, Flags.hs

[Александр Цамутали]

Peter Simons <simons at cryp.to> writes:

> Hi Alexander,
>
> your patch is applied in the latest version of cabal2nix (in a slightly
> modified form):
>
>  > --- a/src/Cabal2Nix/Flags.hs
>  > +++ b/src/Cabal2Nix/Flags.hs
>  > @@ -9,6 +9,7 @@ pkgConfigureFlags (PackageIdentifier (PackageName name) _)
>  >   | name == "threadscope"        = ([], ["--ghc-options=-rtsopts"])
>  >   | name == "X11-xft"            = ([], ["--extra-include-dirs=${freetype}/include/freetype2"])
>  >   | name == "xmonad-extras"      = ([disable "with_hlist", disable "with_mpd"], [])
>  > + | name == "xmobar"             = ([], ["--flags=with_xft"])
>  >   | otherwise                    = ([],[])
>
> The logic in that list is as follows: the first value of the tuple defines
> Cabal flags that may be set or unset. The second value defines "additional"
> parameters to be passed at configure time, such as "--extra-include-dirs",
> etc. The 'with_xft' flag can be set by adding 'enable "with_xft"' in the
> first list. The difference between those two kinds of settings is that Cabal
> flags modify the way the Cabal file is processed, whereas the second kind of
> settings are relevant only for the actual build.
>
>
>  > --- a/src/Cabal2Nix/PostProcess.hs
>  > +++ b/src/Cabal2Nix/PostProcess.hs
>  > @@ -34,4 +34,5 @@ postProcess deriv@(MkDerivation {..})
>  >    | pname == "wxcore"           = deriv { extraLibs = "wxGTK":"mesa":"libX11":extraLibs }
>  >    | pname == "X11"              = deriv { extraLibs = "libXinerama":"libXext":extraLibs }
>  >    | pname == "X11-xft"          = deriv { extraLibs = "pkgconfig":"freetype":"fontconfig":extraLibs }
>  > +  | pname == "xmobar"           = deriv { buildDepends = "X11Xft":buildDepends }
>  >    | otherwise                   = deriv
>
> Cabal2nix automatically picks up that additional dependency when the Cabal
> flag is configured as described above.

Awww, I missed this. :3


-- 
Александр Цамутали