Hi Daniel,
While the proposal is aimed at improving the single-shot mode use case,
I don't see a reason why this wouldn't work in make mode: GHC would
report dependencies of all modules being built. Is there a use case you
have in mind where that would be useful?
- David
On 7/30/19 7:22 PM, Daniel Gröber wrote:
Hi,
from the proposal it sounds like you are planning to only extend the
single-shot mode with the new options, is that right?
I think `ghc --make` could also benefit from being able to communicate
non-module graph dependencies such as `addDependentFile` and CPP
#include to build-tools, no?
I've always been annoyed by the fact that if such dependencies change
cabal will not consider rebuilding.
--Daniel
On Tue, Jul 30, 2019 at 06:58:29PM +0100, David Eichmann wrote:
Hello GHC Developers,
I've recently been working on a proposal (found here
<https://github.com/ghc-proposals/ghc-proposals/pull/245>[1]) for "Extended
Dependency Generation". This new feature takes the form of a new build
option/mode that outputs comprehensive build dependencies for building
Haskell modules. This allows external build tools, such as cabal-install, to
implement correct incremental builds with recompilation avoidance using
GHC's one shot mode to compile individual modules.
All input is appreciated. It would be particularly helpful to hear from the
Cabal, Stack, and Shake communities.
Looking forward to hearing your comments,
David Eichmann
[1] https://github.com/ghc-proposals/ghc-proposals/pull/245
--
David Eichmann, Haskell Consultant
Well-Typed LLP, http://www.well-typed.com
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118 Wymering Mansions, Wymering Road, London W9 2NF, England
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--
David Eichmann, Haskell Consultant
Well-Typed LLP, http://www.well-typed.com
Registered in England & Wales, OC335890
118 Wymering Mansions, Wymering Road, London W9 2NF, England
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