Re: RFC: changes to -i flag for finding source files

On 28 April 2014 18:40, Roman Cheplyaka wrote:

* Simon Marlow [2014-04-28 09:26:23+0100]

...

No, the idea would be to use hs-source-dirs like this:

hs-source-dirs: A.B.C=src

Cabal just passes this in a -i option to GHC, so it almost Just Works, except that Cabal needs to preprocess some source files so it needs to find them, and also sdist needs to find source files.

In that case, I'm in favour of this proposal.

Please consider the reversed syntax instead:

hs-source-dirs: src=A.B.C

I find it more intuitive, because A.B.C becomes sort of an optional parameter, the empty prefix being its default value.

src=A.B.C implies a 1-1 mapping between a srcdir and a module root, whereas A.B.C=src allows different modules (eg. all a project) to live in the same dir: Graphics.UI.Gtk=src System.IO.EEG=src Game.Flappy2048=src Conrad.