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+;;; GNU Guix --- Functional package management for GNU
+;;; Copyright © 2015 Federico Beffa <beffa@fbengineering.ch>
+;;;
+;;; 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 haskell)
+ #:use-module (guix store)
+ #:use-module (guix utils)
+ #:use-module (guix packages)
+ #:use-module (guix derivations)
+ #:use-module (guix build-system)
+ #:use-module (guix build-system gnu)
+ #:use-module (ice-9 match)
+ #:use-module (srfi srfi-26)
+ #:export (haskell-build
+ haskell-build-system))
+
+;; Commentary:
+;;
+;; Standard build procedure for Haskell packages using 'Setup.hs'. This is
+;; implemented as an extension of 'gnu-build-system'.
+;;
+;; Code:
+
+(define (default-haskell)
+ "Return the default Haskell package."
+ ;; Lazily resolve the binding to avoid a circular dependency.
+ (let ((haskell (resolve-interface '(gnu packages haskell))))
+ (module-ref haskell 'ghc)))
+
+(define* (lower name
+ #:key source inputs native-inputs outputs system target
+ (haskell (default-haskell))
+ #:allow-other-keys
+ #:rest arguments)
+ "Return a bag for NAME."
+ (define private-keywords
+ '(#:target #:haskell #:inputs #:native-inputs))
+
+ (and (not target) ;XXX: no cross-compilation
+ (bag
+ (name name)
+ (system system)
+ (host-inputs `(,@(if source
+ `(("source" ,source))
+ '())
+ ,@inputs
+
+ ;; Keep the standard inputs of 'gnu-build-system'.
+ ,@(standard-packages)))
+ (build-inputs `(("haskell" ,haskell)
+ ,@native-inputs))
+ (outputs outputs)
+ (build haskell-build)
+ (arguments (strip-keyword-arguments private-keywords arguments)))))
+
+(define* (haskell-build store name inputs
+ #:key source
+ (haddock? #t)
+ (haddock-flags ''())
+ (tests? #t)
+ (test-target "test")
+ (configure-flags ''())
+ (phases '(@ (guix build haskell-build-system)
+ %standard-phases))
+ (outputs '("out"))
+ (search-paths '())
+ (system (%current-system))
+ (guile #f)
+ (imported-modules '((guix build haskell-build-system)
+ (guix build gnu-build-system)
+ (guix build utils)))
+ (modules '((guix build haskell-build-system)
+ (guix build utils))))
+ "Build SOURCE using HASKELL, and with INPUTS. This assumes that SOURCE
+provides a 'Setup.hs' file as its build system."
+ (define builder
+ `(begin
+ (use-modules ,@modules)
+ (haskell-build #:name ,name
+ #:source ,(match (assoc-ref inputs "source")
+ (((? derivation? source))
+ (derivation->output-path source))
+ ((source)
+ source)
+ (source
+ source))
+ #:configure-flags ,configure-flags
+ #:haddock-flags ,haddock-flags
+ #:system ,system
+ #:test-target ,test-target
+ #:tests? ,tests?
+ #:haddock? ,haddock?
+ #:phases ,phases
+ #: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 haskell-build-system
+ (build-system
+ (name 'haskell)
+ (description "The standard Haskell build system")
+ (lower lower)))
+
+;;; haskell.scm ends here