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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2018 Ludovic Courtès <ludo@gnu.org>
+;;;
+;;; This file is part of GNU Guix.
+;;;
+;;; GNU Guix 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.
+;;;
+;;; GNU Guix 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 GNU Guix. If not, see <http://www.gnu.org/licenses/>.
+
+(define-module (guix build-system guile)
+ #:use-module (guix store)
+ #:use-module (guix utils)
+ #:use-module (guix packages)
+ #:use-module (guix derivations)
+ #:use-module (guix search-paths)
+ #:use-module (guix build-system)
+ #:use-module (guix build-system gnu)
+ #:use-module (ice-9 match)
+ #:use-module (srfi srfi-26)
+ #:export (%guile-build-system-modules
+ guile-build-system))
+
+(define %guile-build-system-modules
+ ;; Build-side modules imported by default.
+ `((guix build guile-build-system)
+ ,@%gnu-build-system-modules))
+
+(define* (lower name
+ #:key source inputs native-inputs outputs system target
+ #:allow-other-keys
+ #:rest arguments)
+ "Return a bag for NAME."
+
+ ;; Note: There's no #:guile argument (unlike, for instance,
+ ;; 'ocaml-build-system' which has #:ocaml.) This is so we can keep
+ ;; procedures like 'package-for-guile-2.0' unchanged and simple.
+
+ (define private-keywords
+ '(#:target #:inputs #:native-inputs))
+
+ (bag
+ (name name)
+ (system system) (target target)
+ (host-inputs `(
+ ,@inputs))
+ (build-inputs `(,@(if source
+ `(("source" ,source))
+ '())
+ ,@native-inputs
+ ,@(map (cute assoc <> (standard-packages))
+ '("tar" "gzip" "bzip2" "xz" "locales"))))
+ (outputs outputs)
+ (build (if target guile-cross-build guile-build))
+ (arguments (strip-keyword-arguments private-keywords arguments))))
+
+(define %compile-flags
+ ;; Flags passed to 'guild compile' by default. We choose a common
+ ;; denominator between Guile 2.0 and 2.2.
+ ''("-Wunbound-variable" "-Warity-mismatch" "-Wformat"))
+
+(define* (guile-build store name inputs
+ #:key source
+ (guile #f)
+ (phases '%standard-phases)
+ (outputs '("out"))
+ (search-paths '())
+ (system (%current-system))
+ (source-directory ".")
+ (compile-flags %compile-flags)
+ (imported-modules %guile-build-system-modules)
+ (modules '((guix build guile-build-system)
+ (guix build utils))))
+ "Build SOURCE using Guile taken from the native inputs, and with INPUTS."
+ (define builder
+ `(begin
+ (use-modules ,@modules)
+ (guile-build #:name ,name
+ #:source ,(match (assoc-ref inputs "source")
+ (((? derivation? source))
+ (derivation->output-path source))
+ ((source)
+ source)
+ (source
+ source))
+ #:source-directory ,source-directory
+ #:compile-flags ,compile-flags
+ #:phases ,phases
+ #:system ,system
+ #:outputs %outputs
+ #:search-paths ',(map search-path-specification->sexp
+ search-paths)
+ #:inputs %build-inputs)))
+
+ (define guile-for-build
+ (match guile
+ ((? package?)
+ (package-derivation store guile system #:graft? #f))
+ (#f ; the default
+ (let* ((distro (resolve-interface '(gnu packages commencement)))
+ (guile (module-ref distro 'guile-final)))
+ (package-derivation store guile system #:graft? #f)))))
+
+ (build-expression->derivation store name builder
+ #:inputs inputs
+ #:system system
+ #:modules imported-modules
+ #:outputs outputs
+ #:guile-for-build guile-for-build))
+
+(define* (guile-cross-build store name
+ #:key
+ (system (%current-system)) target
+ native-drvs target-drvs
+ (guile #f)
+ source
+ (outputs '("out"))
+ (search-paths '())
+ (native-search-paths '())
+
+ (phases '%standard-phases)
+ (source-directory ".")
+ (compile-flags %compile-flags)
+ (imported-modules %guile-build-system-modules)
+ (modules '((guix build guile-build-system)
+ (guix build utils))))
+ (define builder
+ `(begin
+ (use-modules ,@modules)
+
+ (let ()
+ (define %build-host-inputs
+ ',(map (match-lambda
+ ((name (? derivation? drv) sub ...)
+ `(,name . ,(apply derivation->output-path drv sub)))
+ ((name path)
+ `(,name . ,path)))
+ native-drvs))
+
+ (define %build-target-inputs
+ ',(map (match-lambda
+ ((name (? derivation? drv) sub ...)
+ `(,name . ,(apply derivation->output-path drv sub)))
+ ((name (? package? pkg) sub ...)
+ (let ((drv (package-cross-derivation store pkg
+ target system)))
+ `(,name . ,(apply derivation->output-path drv sub))))
+ ((name path)
+ `(,name . ,path)))
+ target-drvs))
+
+ (guile-build #:source ,(match (assoc-ref native-drvs "source")
+ (((? derivation? source))
+ (derivation->output-path source))
+ ((source)
+ source)
+ (source
+ source))
+ #:system ,system
+ #:target ,target
+ #:outputs %outputs
+ #:source-directory ,source-directory
+ #:compile-flags ,compile-flags
+ #:inputs %build-target-inputs
+ #:native-inputs %build-host-inputs
+ #:search-paths ',(map search-path-specification->sexp
+ search-paths)
+ #:native-search-paths ',(map
+ search-path-specification->sexp
+ native-search-paths)
+ #:phases ,phases))))
+
+ (define guile-for-build
+ (match guile
+ ((? package?)
+ (package-derivation store guile system #:graft? #f))
+ (#f ; the default
+ (let* ((distro (resolve-interface '(gnu packages commencement)))
+ (guile (module-ref distro 'guile-final)))
+ (package-derivation store guile system #:graft? #f)))))
+
+ (build-expression->derivation store name builder
+ #:system system
+ #:inputs (append native-drvs target-drvs)
+ #:outputs outputs
+ #:modules imported-modules
+ #:substitutable? substitutable?
+ #:guile-for-build guile-for-build))
+
+(define guile-build-system
+ (build-system
+ (name 'guile)
+ (description "The build system for simple Guile packages")
+ (lower lower)))