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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 modules)
#:use-module (guix monads)
#:use-module (guix profiles)
#:use-module (guix search-paths)
#:use-module (guix store)
#:export (with-manifest
with-packages))
(define (with-manifest manifest exp)
"Return a gexp executing EXP, another gexp, in a profile defined by
MANIFEST."
(with-imported-modules (source-module-closure '((guix search-paths)))
#~(begin
;; Set the environment.
;; We pull out match-lambda using module-ref instead of using
;; use-modules because this gexp will be substituted into other
;; gexps and use-modules only works at the top-level.
(let-syntax ((match-lambda (macro-transformer
(module-ref (resolve-module '(ice-9 match))
'match-lambda))))
(let ((evaluate-search-paths (@@ (guix search-paths) evaluate-search-paths))
(search-path-specification-variable (@@ (guix search-paths)
search-path-specification-variable))
(sexp->search-path-specification (@@ (guix search-paths)
sexp->search-path-specification)))
(for-each (match-lambda
((specification . value)
(setenv (search-path-specification-variable specification)
value)))
(evaluate-search-paths
(map sexp->search-path-specification
'#$(map search-path-specification->sexp
(manifest-search-paths manifest)))
(list #$(profile
(content manifest)
(allow-collisions? #t)))))))
;; Run the provided expression.
#$exp)))
(define (profile-with-packages packages)
"Return profile with PACKAGES."
(with-store store
(run-with-store store
(mlet* %store-monad ((prof-drv (profile-derivation
(packages->manifest packages)))
(profile -> (derivation->output-path prof-drv)))
(mbegin %store-monad
(built-derivations (list prof-drv))
(return profile))))))
(define (environment-with-packages packages)
"Return environment of a profile with PACKAGES. Return value is an
association list mapping the name of an environment variable to its
value."
(map (match-lambda
((search-path . value)
(cons (search-path-specification-variable search-path)
value)))
(profile-search-paths (profile-with-packages packages))))
(define (with-packages packages exp)
"Return a gexp executing EXP, another gexp, in an environment where
PACKAGES are available and their search path environment variables
have been set."
#~(begin
;; Add a reference to the profile.
#$(profile-with-packages packages)
;; Set the environment.
;; We pull out match-lambda using module-ref instead of using
;; use-modules because this gexp will be substituted into other
;; gexps and use-modules only works at the top-level.
(let-syntax ((match-lambda (macro-transformer
(module-ref (resolve-module '(ice-9 match))
'match-lambda))))
(for-each (match-lambda
((variable . value)
(setenv variable value)))
'#$(environment-with-packages packages)))
;; Run the provided expression.
#$exp))
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