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;;; guix-forge --- Guix software forge meta-service
;;; Copyright © 2022 Arun Isaac <arunisaac@systemreboot.net>
;;;
;;; This file is part of guix-forge.
;;;
;;; guix-forge is free software: you can redistribute it and/or modify
;;; it under the terms of the GNU General Public License as published
;;; by the Free Software Foundation, either version 3 of the License,
;;; or (at your option) any later version.
;;;
;;; guix-forge is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
;;; General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with guix-forge. If not, see
;;; <https://www.gnu.org/licenses/>.
(define-module (forge utils)
#:use-module (ice-9 match)
#:use-module (guix derivations)
#:use-module (guix gexp)
#:use-module (guix monads)
#:use-module (guix profiles)
#:use-module (guix search-paths)
#:use-module (guix store)
#:export (with-packages))
(define (profile-with-packages packages)
"Return profile with PACKAGES."
(with-store store
(run-with-store store
(mlet* %store-monad ((prof-drv (profile-derivation
(packages->manifest packages)))
(profile -> (derivation->output-path prof-drv)))
(mbegin %store-monad
(built-derivations (list prof-drv))
(return profile))))))
(define (environment-with-packages packages)
"Return environment of a profile with PACKAGES. Return value is an
association list mapping the name of an environment variable to its
value."
(map (match-lambda
((search-path . value)
(cons (search-path-specification-variable search-path)
value)))
(profile-search-paths (profile-with-packages packages))))
(define (with-packages packages exp)
"Return a gexp executing EXP, another gexp, in an environment where
PACKAGES are available and their search path environment variables
have been set."
#~(begin
(use-modules (ice-9 match))
;; Add a reference to the profile.
#$(profile-with-packages packages)
;; Set the environment.
(for-each (match-lambda
((variable . value)
(setenv variable value)))
'#$(environment-with-packages packages))
;; Run the provided expression.
#$exp))
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