From gergo at erdi.hu  Tue Apr  6 10:16:23 2021
From: gergo at erdi.hu (=?ISO-8859-2?Q?=C9RDI_Gerg=F5?=)
Date: Tue, 6 Apr 2021 18:16:23 +0800 (+08)
Subject: Interleaving per-component hooks with build
In-Reply-To: <alpine.DEB.2.22.394.2103151916500.245873@galaxy>
References: <alpine.DEB.2.22.394.2103030906050.3992@galaxy>
 <alpine.DEB.2.22.394.2103141825200.245873@galaxy>
 <alpine.DEB.2.22.394.2103151916500.245873@galaxy>
Message-ID: <alpine.DEB.2.22.394.2104061753170.245873@galaxy>

On Mon, 15 Mar 2021, ÉRDI Gergő wrote:

> So my problem is that the package DB returned by `absolutePackageDBPaths $ 
> withPackageDB localInfo` doesn't contain the just-build library, even though 
> (supposedly) the library has already been built by that point.

I've figured out the solution to this one (after not receiving any replies 
on this thread for almost a month...): I was missing the so-called 
"internal package DB". For anyone interested, the following Haskell module 
defines `withComponentHook`, a build hook transformator that allows each 
component's `BuildInfo` to be edited just before building them:

https://github.com/gergoerdi/clashilator/blob/c2561e8465ba235aa4836e3bfae35f84fa578d26/src/Clash/Clashilator/Cabal.hs

Illustrating its use is the following module:

https://github.com/gergoerdi/clashilator/blob/c2561e8465ba235aa4836e3bfae35f84fa578d26/src/Clash/Clashilator/Setup.hs

I'm opening a Cabal ticket to hopefully start a conversation on adding 
something similar to Cabal itself.

G