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[bug#48999] [PATCH] import: hackage: Accept local source for package.
From: |
Ludovic Courtès |
Subject: |
[bug#48999] [PATCH] import: hackage: Accept local source for package. |
Date: |
Tue, 29 Jun 2021 11:44:40 +0200 |
User-agent: |
Gnus/5.13 (Gnus v5.13) Emacs/27.2 (gnu/linux) |
Hi,
Xinglu Chen <public@yoctocell.xyz> skribis:
> When developing a Haskell package it is often useful to have a Guix package
> definition for that package, previously one would have to write that package
> definition by hand, and if the .cabal file changed one would manually update
> the Guix package definition.
>
> This commit allows one to specify a custom source for their package, meaning
> that one could programatically generate a Guix package definition for their
> local Haskell package. If the .cabal file changes, the generated package
> definition will also change accordingly. One could for instance write the
> following in a guix.scm file:
>
> (define-values (ghc-haskeme deps)
> (call-with-input-file "haskeme.cabal"
> (lambda (port)
> (hackage->guix-package
> "haskeme"
> #:port port
> #:source (local-file "." "haskeme-checkout"
> #:recursive? #t
> #:select? hg-predicate)))))
>
> ghc-haskeme
>
> Invoking ‘guix build -f guix.scm’ would then always build an up-to-date
> version of the package.
>
> * guix/import/hackage.scm (hackage-module->sexp): Add optional keyword
> argument ‘source’
> (hackage->guix-package): Likewise.
> * tests/hackage.scm (eval-test-with-cabal): Likewise.
> ("hackage->guix-package local source"): New test.
Looks like a nice improvement.
What I don’t get is that this functionality doesn’t seem to be available
from the CLI, which the patch doesn’t change. Or am I missing
something?
Thanks,
Ludo’.