;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2017, 2020 Ricardo Wurmus <rekado@elephly.net>
;;; Copyright © 2021 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 import print)
#:use-module (guix base32)
#:use-module (guix licenses)
#:use-module (guix packages)
#:use-module ((guix diagnostics) #:select (location-file))
#:use-module (guix search-paths)
#:use-module (guix build-system)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:use-module (guix import utils)
#:use-module (ice-9 control)
#:use-module (ice-9 match)
#:export (package->code))
(define (redundant-input-labels? inputs)
"Return #t if input labels in the INPUTS list are redundant."
(every (match-lambda
((label (? package? package) . _)
(string=? label (package-name package)))
(_ #f))
inputs))
(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))))
(if var
(symbol-append 'license: var)
`(license
,(license-name lic)
,(license-uri lic)
,(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 (factorized-uri-code uri version)
(match (factorize-uri uri version)
((? string? uri) uri)
((factorized ...) `(string-append ,@factorized))))
(define (source->code source version)
(let ((uri (origin-uri source))
(method (origin-method source))
(hash (origin-hash source))
(file-name (origin-file-name source))
(patches (origin-patches source)))
`(origin
;; Since 'procedure-name' returns the procedure name within the
;; module where it's defined, not its public name. Thus, try hard to
;; find its public name and use 'procedure-name' as a last resort.
(method ,(or (any (lambda (module)
(variable-name method module))
'((guix download)
(guix git-download)
(guix hg-download)
(guix svn-download)))
(procedure-name method)))
(uri ,(if version
(match uri
((? string? uri)
(factorized-uri-code uri version))
((lst ...)
`(list
,@(map (cut factorized-uri-code <> version) uri))))
uri))
,(if (equal? (content-hash-algorithm hash) 'sha256)
`(sha256 (base32 ,(bytevector->nix-base32-string
(content-hash-value hash))))
`(hash (content-hash ,(bytevector->nix-base32-string
(content-hash-value hash))
,(content-hash-algorithm hash))))
;; 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".
,@(cond ((null? patches)
'())
((every string? patches)
`((patches (search-patches ,@(map basename patches)))))
(else
`((patches (list ,@(map (match-lambda
((? string? file)
`(search-patch ,file))
((? origin? origin)
(source->code origin #f)))
patches)))))))))
(define (variable-reference module name)
;; FIXME: using '@ certainly isn't pretty, but it avoids having to import
;; the individual package modules.
(list '@ module name))
(define (object->code obj quoted?)
(match obj
((? package? package)
(let* ((module (package-module-name package))
(name (variable-name package module)))
(if quoted?
(list 'unquote (variable-reference module name))
(variable-reference module name))))
((? origin? origin)
(let ((code (source->code origin #f)))
(if quoted?
(list 'unquote code)
code)))
((lst ...)
(let ((lst (map (cut object->code <> #t) lst)))
(if quoted?
lst
(list 'quasiquote lst))))
(obj
obj)))
(define (inputs->code inputs)
(if (redundant-input-labels? inputs)
`(list ,@(map (match-lambda ;no need for input labels ("new style")
((_ package)
(let* ((module (package-module-name package))
(name (variable-name package module)))
(variable-reference module name)))
((_ package output)
(let* ((module (package-module-name package))
(name (variable-name package module)))
(list 'quasiquote
(list
(list 'unquote
(variable-reference module name))
output)))))
inputs))
(list 'quasiquote ;preserve input labels (deprecated)
(object->code inputs #t))))
(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)))
`(define-public ,(string->symbol name)
(package
(name ,name)
(version ,version)
(source ,(source->code source version))
,@(match properties
(() '())
(_ `((properties
,(list 'quasiquote (object->code properties #t))))))
,@(if replacement
`((replacement ,replacement))
'())
(build-system (@ (guix build-system ,(build-system-name build-system))
,(symbol-append (build-system-name build-system)
'-build-system)))
,@(match arguments
(() '())
(_ `((arguments
,(list 'quasiquote (object->code arguments #t))))))
,@(match outputs
(("out") '())
(outs `((outputs (list ,@outs)))))
,@(match native-inputs
(() '())
(pkgs `((native-inputs ,(inputs->code pkgs)))))
,@(match inputs
(() '())
(pkgs `((inputs ,(inputs->code pkgs)))))
,@(match propagated-inputs
(() '())
(pkgs `((propagated-inputs ,(inputs->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)))))))
