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;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2017 Ricardo Wurmus <rekado@elephly.net>
;;;
;;; 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 import print)
#:use-module (guix base32)
#:use-module (guix utils)
#:use-module (guix licenses)
#:use-module (guix packages)
#:use-module (guix search-paths)
#:use-module (guix build-system)
#:use-module (gnu packages)
#:use-module (srfi srfi-1)
#:use-module (guix import utils)
#:use-module (ice-9 control)
#:use-module (ice-9 match)
#:export (package->code))
;; FIXME: the quasiquoted arguments field may contain embedded package
;; objects, e.g. in #:disallowed-references; they will just be printed with
;; their usual #<package ...> representation, not as variable names.
(define (package->code package)
"Return an S-expression representing the source code that produces PACKAGE
when evaluated."
;; The module in which the package PKG is defined
(define (package-module-name pkg)
(map string->symbol
(string-split (string-drop-right
(location-file (package-location pkg)) 4)
#\/)))
;; Return the first candidate variable name that is bound to VAL.
(define (variable-name val mod)
(match (let/ec return
(module-for-each (lambda (sym var)
(if (eq? val (variable-ref var))
(return sym)
#f))
(resolve-interface mod)))
((? symbol? sym) sym)
(_ #f)))
;; Print either license variable name or the code for a license object
(define (license->code lic)
(let ((var (variable-name lic '(guix licenses))))
(or var
`(license
(name ,(license-name lic))
(uri ,(license-uri lic))
(comment ,(license-comment lic))))))
(define (search-path-specification->code spec)
`(search-path-specification
(variable ,(search-path-specification-variable spec))
(files (list ,@(search-path-specification-files spec)))
(separator ,(search-path-specification-separator spec))
(file-type (quote ,(search-path-specification-file-type spec)))
(file-pattern ,(search-path-specification-file-pattern spec))))
(define (source->code source version)
(let ((uri (origin-uri source))
(method (origin-method source))
(sha256 (origin-sha256 source))
(file-name (origin-file-name source))
(patches (origin-patches source)))
`(origin
(method ,(procedure-name method))
(uri (string-append ,@(factorize-uri uri version)))
(sha256
(base32
,(format #f "~a" (bytevector->nix-base32-string sha256))))
;; FIXME: in order to be able to throw away the directory prefix,
;; we just assume that the patch files can be found with
;; "search-patches".
,@(if (null? patches) '()
`((patches (search-patches ,@(map basename patches))))))))
(define (package-lists->code lsts)
(list 'quasiquote
(map (match-lambda
((label pkg . out)
(let ((mod (package-module-name pkg)))
(list label
;; FIXME: using '@ certainly isn't pretty, but it
;; avoids having to import the individual package
;; modules.
(list 'unquote
(list '@ mod (variable-name pkg mod)))))))
lsts)))
(let ((name (package-name package))
(version (package-version package))
(source (package-source package))
(build-system (package-build-system package))
(arguments (package-arguments package))
(inputs (package-inputs package))
(propagated-inputs (package-propagated-inputs package))
(native-inputs (package-native-inputs package))
(outputs (package-outputs package))
(native-search-paths (package-native-search-paths package))
(search-paths (package-search-paths package))
(replacement (package-replacement package))
(synopsis (package-synopsis package))
(description (package-description package))
(license (package-license package))
(home-page (package-home-page package))
(supported-systems (package-supported-systems package))
(properties (package-properties package)))
`(package
(name ,name)
(version ,version)
(source ,(source->code source version))
,@(match properties
(() '())
(_ `((properties ,properties))))
,@(if replacement
`((replacement ,replacement))
'())
(build-system ,(symbol-append (build-system-name build-system)
'-build-system))
,@(match arguments
(() '())
(args `((arguments ,(list 'quasiquote args)))))
,@(match outputs
(("out") '())
(outs `((outputs (list ,@outs)))))
,@(match native-inputs
(() '())
(pkgs `((native-inputs ,(package-lists->code pkgs)))))
,@(match inputs
(() '())
(pkgs `((inputs ,(package-lists->code pkgs)))))
,@(match propagated-inputs
(() '())
(pkgs `((propagated-inputs ,(package-lists->code pkgs)))))
,@(if (lset= string=? supported-systems %supported-systems)
'()
`((supported-systems (list ,@supported-systems))))
,@(match (map search-path-specification->code native-search-paths)
(() '())
(paths `((native-search-paths (list ,@paths)))))
,@(match (map search-path-specification->code search-paths)
(() '())
(paths `((search-paths (list ,@paths)))))
(home-page ,home-page)
(synopsis ,synopsis)
(description ,description)
(license ,(if (list? license)
`(list ,@(map license->code license))
(license->code license))))))
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