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1 | ;;; GNU Guix --- Functional package management for GNU |
2 | ;;; Copyright © 2014, 2015, 2016 Ludovic Courtès <ludo@gnu.org> | |
3 | ;;; | |
4 | ;;; This file is part of GNU Guix. | |
5 | ;;; | |
6 | ;;; GNU Guix is free software; you can redistribute it and/or modify it | |
7 | ;;; under the terms of the GNU General Public License as published by | |
8 | ;;; the Free Software Foundation; either version 3 of the License, or (at | |
9 | ;;; your option) any later version. | |
10 | ;;; | |
11 | ;;; GNU Guix is distributed in the hope that it will be useful, but | |
12 | ;;; WITHOUT ANY WARRANTY; without even the implied warranty of | |
13 | ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
14 | ;;; GNU General Public License for more details. | |
15 | ;;; | |
16 | ;;; You should have received a copy of the GNU General Public License | |
17 | ;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. | |
18 | ||
19 | (define-module (guix grafts) | |
20 | #:use-module (guix records) | |
21 | #:use-module (guix derivations) | |
22 | #:use-module ((guix utils) #:select (%current-system)) | |
23 | #:use-module (srfi srfi-1) | |
acb01e37 | 24 | #:use-module (srfi srfi-9 gnu) |
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25 | #:use-module (srfi srfi-26) |
26 | #:use-module (ice-9 match) | |
27 | #:export (graft? | |
28 | graft | |
29 | graft-origin | |
30 | graft-replacement | |
31 | graft-origin-output | |
32 | graft-replacement-output | |
33 | ||
34 | graft-derivation | |
35 | ||
36 | %graft? | |
37 | set-grafting)) | |
38 | ||
39 | (define-record-type* <graft> graft make-graft | |
40 | graft? | |
41 | (origin graft-origin) ;derivation | store item | |
42 | (origin-output graft-origin-output ;string | #f | |
43 | (default "out")) | |
44 | (replacement graft-replacement) ;derivation | store item | |
45 | (replacement-output graft-replacement-output ;string | #f | |
46 | (default "out"))) | |
47 | ||
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48 | (define (write-graft graft port) |
49 | "Write a concise representation of GRAFT to PORT." | |
50 | (define (->string thing output) | |
51 | (if (derivation? thing) | |
52 | (derivation->output-path thing output) | |
53 | thing)) | |
54 | ||
55 | (match graft | |
56 | (($ <graft> origin origin-output replacement replacement-output) | |
57 | (format port "#<graft ~a ==> ~a ~a>" | |
58 | (->string origin origin-output) | |
59 | (->string replacement replacement-output) | |
60 | (number->string (object-address graft) 16))))) | |
61 | ||
62 | (set-record-type-printer! <graft> write-graft) | |
63 | ||
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64 | (define* (graft-derivation store drv grafts |
65 | #:key | |
66 | (name (derivation-name drv)) | |
67 | (guile (%guile-for-build)) | |
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68 | (system (%current-system))) |
69 | "Return a derivation called NAME, based on DRV but with all the GRAFTS | |
70 | applied." | |
71 | ;; XXX: Someday rewrite using gexps. | |
72 | (define mapping | |
73 | ;; List of store item pairs. | |
74 | (map (match-lambda | |
75 | (($ <graft> source source-output target target-output) | |
76 | (cons (if (derivation? source) | |
77 | (derivation->output-path source source-output) | |
78 | source) | |
79 | (if (derivation? target) | |
80 | (derivation->output-path target target-output) | |
81 | target)))) | |
82 | grafts)) | |
83 | ||
84 | (define outputs | |
85 | (match (derivation-outputs drv) | |
86 | (((names . outputs) ...) | |
87 | (map derivation-output-path outputs)))) | |
88 | ||
89 | (define output-names | |
90 | (match (derivation-outputs drv) | |
91 | (((names . outputs) ...) | |
92 | names))) | |
93 | ||
94 | (define build | |
95 | `(begin | |
96 | (use-modules (guix build graft) | |
97 | (guix build utils) | |
98 | (ice-9 match)) | |
99 | ||
100 | (let ((mapping ',mapping)) | |
101 | (for-each (lambda (input output) | |
102 | (format #t "grafting '~a' -> '~a'...~%" input output) | |
103 | (force-output) | |
104 | (rewrite-directory input output | |
105 | `((,input . ,output) | |
106 | ,@mapping))) | |
107 | ',outputs | |
108 | (match %outputs | |
109 | (((names . files) ...) | |
110 | files)))))) | |
111 | ||
112 | (define add-label | |
113 | (cut cons "x" <>)) | |
114 | ||
115 | (match grafts | |
116 | ((($ <graft> sources source-outputs targets target-outputs) ...) | |
117 | (let ((sources (zip sources source-outputs)) | |
118 | (targets (zip targets target-outputs))) | |
119 | (build-expression->derivation store name build | |
120 | #:system system | |
121 | #:guile-for-build guile | |
122 | #:modules '((guix build graft) | |
123 | (guix build utils)) | |
124 | #:inputs `(,@(map (lambda (out) | |
125 | `("x" ,drv ,out)) | |
126 | output-names) | |
127 | ,@(append (map add-label sources) | |
128 | (map add-label targets))) | |
129 | #:outputs output-names | |
130 | #:local-build? #t))))) | |
131 | ||
132 | \f | |
133 | ;; The following might feel more at home in (guix packages) but since (guix | |
134 | ;; gexp), which is a lower level, needs them, we put them here. | |
135 | ||
136 | (define %graft? | |
137 | ;; Whether to honor package grafts by default. | |
138 | (make-parameter #t)) | |
139 | ||
140 | (define (set-grafting enable?) | |
141 | "This monadic procedure enables grafting when ENABLE? is true, and disables | |
142 | it otherwise. It returns the previous setting." | |
143 | (lambda (store) | |
144 | (values (%graft? enable?) store))) | |
145 | ||
146 | ;;; grafts.scm ends here |