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7adf9b84 | 1 | ;;; GNU Guix --- Functional package management for GNU |
71085430 | 2 | ;;; Copyright © 2014, 2015, 2016, 2017, 2018, 2019, 2020 Ludovic Courtès <ludo@gnu.org> |
7adf9b84 LC |
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) | |
c22a1324 LC |
20 | #:use-module (guix store) |
21 | #:use-module (guix monads) | |
7adf9b84 LC |
22 | #:use-module (guix records) |
23 | #:use-module (guix derivations) | |
24 | #:use-module ((guix utils) #:select (%current-system)) | |
aad086d8 | 25 | #:use-module (guix sets) |
7adf9b84 | 26 | #:use-module (srfi srfi-1) |
acb01e37 | 27 | #:use-module (srfi srfi-9 gnu) |
7adf9b84 | 28 | #:use-module (srfi srfi-26) |
c90cb5c9 | 29 | #:use-module (srfi srfi-34) |
7adf9b84 | 30 | #:use-module (ice-9 match) |
c90cb5c9 | 31 | #:use-module (ice-9 vlist) |
7adf9b84 LC |
32 | #:export (graft? |
33 | graft | |
34 | graft-origin | |
35 | graft-replacement | |
36 | graft-origin-output | |
37 | graft-replacement-output | |
38 | ||
39 | graft-derivation | |
c22a1324 | 40 | graft-derivation/shallow |
7adf9b84 LC |
41 | |
42 | %graft? | |
c6080c32 LC |
43 | set-grafting |
44 | grafting?)) | |
7adf9b84 LC |
45 | |
46 | (define-record-type* <graft> graft make-graft | |
47 | graft? | |
48 | (origin graft-origin) ;derivation | store item | |
49 | (origin-output graft-origin-output ;string | #f | |
50 | (default "out")) | |
51 | (replacement graft-replacement) ;derivation | store item | |
52 | (replacement-output graft-replacement-output ;string | #f | |
53 | (default "out"))) | |
54 | ||
acb01e37 LC |
55 | (define (write-graft graft port) |
56 | "Write a concise representation of GRAFT to PORT." | |
57 | (define (->string thing output) | |
58 | (if (derivation? thing) | |
59 | (derivation->output-path thing output) | |
60 | thing)) | |
61 | ||
62 | (match graft | |
63 | (($ <graft> origin origin-output replacement replacement-output) | |
64 | (format port "#<graft ~a ==> ~a ~a>" | |
65 | (->string origin origin-output) | |
66 | (->string replacement replacement-output) | |
67 | (number->string (object-address graft) 16))))) | |
68 | ||
69 | (set-record-type-printer! <graft> write-graft) | |
70 | ||
c22a1324 LC |
71 | (define (graft-origin-file-name graft) |
72 | "Return the output file name of the origin of GRAFT." | |
73 | (match graft | |
74 | (($ <graft> (? derivation? origin) output) | |
75 | (derivation->output-path origin output)) | |
76 | (($ <graft> (? string? item)) | |
77 | item))) | |
78 | ||
79 | (define* (graft-derivation/shallow store drv grafts | |
80 | #:key | |
81 | (name (derivation-name drv)) | |
fd7d1235 | 82 | (outputs (derivation-output-names drv)) |
c22a1324 LC |
83 | (guile (%guile-for-build)) |
84 | (system (%current-system))) | |
fd7d1235 LC |
85 | "Return a derivation called NAME, which applies GRAFTS to the specified |
86 | OUTPUTS of DRV. This procedure performs \"shallow\" grafting in that GRAFTS | |
87 | are not recursively applied to dependencies of DRV." | |
7adf9b84 LC |
88 | ;; XXX: Someday rewrite using gexps. |
89 | (define mapping | |
90 | ;; List of store item pairs. | |
91 | (map (match-lambda | |
92 | (($ <graft> source source-output target target-output) | |
93 | (cons (if (derivation? source) | |
94 | (derivation->output-path source source-output) | |
95 | source) | |
96 | (if (derivation? target) | |
97 | (derivation->output-path target target-output) | |
98 | target)))) | |
99 | grafts)) | |
100 | ||
fd7d1235 LC |
101 | (define output-pairs |
102 | (map (lambda (output) | |
103 | (cons output | |
104 | (derivation-output-path | |
105 | (assoc-ref (derivation-outputs drv) output)))) | |
106 | outputs)) | |
7adf9b84 LC |
107 | |
108 | (define build | |
109 | `(begin | |
110 | (use-modules (guix build graft) | |
111 | (guix build utils) | |
112 | (ice-9 match)) | |
113 | ||
fd7d1235 | 114 | (let* ((old-outputs ',output-pairs) |
f376dc3a LC |
115 | (mapping (append ',mapping |
116 | (map (match-lambda | |
117 | ((name . file) | |
118 | (cons (assoc-ref old-outputs name) | |
119 | file))) | |
120 | %outputs)))) | |
e4297aa8 | 121 | (graft old-outputs %outputs mapping)))) |
7adf9b84 LC |
122 | |
123 | (define add-label | |
124 | (cut cons "x" <>)) | |
125 | ||
64fd1c01 LC |
126 | (define properties |
127 | `((type . graft) | |
128 | (graft (count . ,(length grafts))))) | |
129 | ||
7adf9b84 LC |
130 | (match grafts |
131 | ((($ <graft> sources source-outputs targets target-outputs) ...) | |
132 | (let ((sources (zip sources source-outputs)) | |
133 | (targets (zip targets target-outputs))) | |
134 | (build-expression->derivation store name build | |
135 | #:system system | |
136 | #:guile-for-build guile | |
137 | #:modules '((guix build graft) | |
93c33389 LC |
138 | (guix build utils) |
139 | (guix build debug-link) | |
140 | (guix elf)) | |
7adf9b84 LC |
141 | #:inputs `(,@(map (lambda (out) |
142 | `("x" ,drv ,out)) | |
fd7d1235 | 143 | outputs) |
7adf9b84 LC |
144 | ,@(append (map add-label sources) |
145 | (map add-label targets))) | |
fd7d1235 | 146 | #:outputs outputs |
7bc5657f LC |
147 | |
148 | ;; Grafts are computationally cheap so no | |
149 | ;; need to offload or substitute. | |
64fd1c01 | 150 | #:local-build? #t |
7bc5657f LC |
151 | #:substitutable? #f |
152 | ||
64fd1c01 | 153 | #:properties properties))))) |
c22a1324 | 154 | |
4b75a706 | 155 | (define (non-self-references store drv outputs) |
c22a1324 | 156 | "Return the list of references of the OUTPUTS of DRV, excluding self |
4b75a706 | 157 | references." |
c90cb5c9 | 158 | (define (references* items) |
71085430 | 159 | ;; Return the references of ITEMS. |
f9e8a123 | 160 | (guard (c ((store-protocol-error? c) |
71085430 | 161 | ;; ITEMS are not in store so build INPUT first. |
4b75a706 LC |
162 | (and (build-derivations store (list drv)) |
163 | (append-map (cut references/cached store <>) items)))) | |
164 | (append-map (cut references/cached store <>) items))) | |
c90cb5c9 | 165 | |
4b75a706 LC |
166 | (let ((refs (references* (map (cut derivation->output-path drv <>) |
167 | outputs))) | |
168 | (self (match (derivation->output-paths drv) | |
169 | (((names . items) ...) | |
170 | items)))) | |
171 | (remove (cut member <> self) refs))) | |
c90cb5c9 | 172 | |
d38bc9a9 LC |
173 | (define-syntax-rule (with-cache key exp ...) |
174 | "Cache the value of monadic expression EXP under KEY." | |
175 | (mlet %state-monad ((cache (current-state))) | |
482fda27 | 176 | (match (vhash-assoc key cache) |
d38bc9a9 LC |
177 | ((_ . result) ;cache hit |
178 | (return result)) | |
179 | (#f ;cache miss | |
0aeed5e3 LC |
180 | (mlet %state-monad ((result (begin exp ...)) |
181 | (cache (current-state))) | |
90ad5c88 | 182 | (mbegin %state-monad |
482fda27 | 183 | (set-current-state (vhash-cons key result cache)) |
90ad5c88 | 184 | (return result))))))) |
d38bc9a9 | 185 | |
aad086d8 LC |
186 | (define (reference-origin drv item) |
187 | "Return the derivation/output pair among the inputs of DRV, recursively, | |
188 | that produces ITEM. Return #f if ITEM is not produced by a derivation (i.e., | |
189 | it's a content-addressed \"source\"), or if it's not produced by a dependency | |
190 | of DRV." | |
191 | ;; Perform a breadth-first traversal of the dependency graph of DRV in | |
192 | ;; search of the derivation that produces ITEM. | |
193 | (let loop ((drv (list drv)) | |
194 | (visited (setq))) | |
195 | (match drv | |
196 | (() | |
197 | #f) | |
198 | ((drv . rest) | |
199 | (if (set-contains? visited drv) | |
200 | (loop rest visited) | |
201 | (let ((inputs (derivation-inputs drv))) | |
202 | (or (any (lambda (input) | |
203 | (let ((drv (derivation-input-derivation input))) | |
204 | (any (match-lambda | |
205 | ((output . file) | |
206 | (and (string=? file item) | |
207 | (cons drv output)))) | |
208 | (derivation->output-paths drv)))) | |
209 | inputs) | |
210 | (loop (append rest (map derivation-input-derivation inputs)) | |
211 | (set-insert drv visited))))))))) | |
212 | ||
c22a1324 LC |
213 | (define* (cumulative-grafts store drv grafts |
214 | #:key | |
215 | (outputs (derivation-output-names drv)) | |
216 | (guile (%guile-for-build)) | |
217 | (system (%current-system))) | |
218 | "Augment GRAFTS with additional grafts resulting from the application of | |
4b75a706 | 219 | GRAFTS to the dependencies of DRV. Return the resulting list of grafts. |
d4da602e LC |
220 | |
221 | This is a monadic procedure in %STATE-MONAD where the state is a vhash mapping | |
222 | derivations to the corresponding set of grafts." | |
b013c33f LC |
223 | (define (graft-origin? drv graft) |
224 | ;; Return true if DRV corresponds to the origin of GRAFT. | |
225 | (match graft | |
226 | (($ <graft> (? derivation? origin) output) | |
227 | (match (assoc-ref (derivation->output-paths drv) output) | |
228 | ((? string? result) | |
229 | (string=? result | |
230 | (derivation->output-path origin output))) | |
231 | (_ | |
232 | #f))) | |
233 | (_ | |
234 | #f))) | |
235 | ||
c22a1324 | 236 | (define (dependency-grafts item) |
aad086d8 LC |
237 | (match (reference-origin drv item) |
238 | ((drv . output) | |
239 | ;; If GRAFTS already contains a graft from DRV, do not override it. | |
240 | (if (find (cut graft-origin? drv <>) grafts) | |
241 | (state-return grafts) | |
4b75a706 | 242 | (cumulative-grafts store drv grafts |
aad086d8 LC |
243 | #:outputs (list output) |
244 | #:guile guile | |
245 | #:system system))) | |
246 | (#f | |
247 | (state-return grafts)))) | |
d4da602e | 248 | |
482fda27 | 249 | (with-cache (cons (derivation-file-name drv) outputs) |
4b75a706 | 250 | (match (non-self-references store drv outputs) |
d38bc9a9 | 251 | (() ;no dependencies |
d4da602e | 252 | (return grafts)) |
d38bc9a9 LC |
253 | (deps ;one or more dependencies |
254 | (mlet %state-monad ((grafts (mapm %state-monad dependency-grafts deps))) | |
255 | (let ((grafts (delete-duplicates (concatenate grafts) equal?))) | |
256 | (match (filter (lambda (graft) | |
257 | (member (graft-origin-file-name graft) deps)) | |
258 | grafts) | |
259 | (() | |
260 | (return grafts)) | |
261 | ((applicable ..1) | |
262 | ;; Use APPLICABLE, the subset of GRAFTS that is really | |
263 | ;; applicable to DRV, to avoid creating several identical | |
264 | ;; grafted variants of DRV. | |
265 | (let* ((new (graft-derivation/shallow store drv applicable | |
482fda27 | 266 | #:outputs outputs |
d38bc9a9 LC |
267 | #:guile guile |
268 | #:system system)) | |
d38bc9a9 LC |
269 | (grafts (append (map (lambda (output) |
270 | (graft | |
271 | (origin drv) | |
272 | (origin-output output) | |
273 | (replacement new) | |
274 | (replacement-output output))) | |
482fda27 | 275 | outputs) |
d38bc9a9 LC |
276 | grafts))) |
277 | (return grafts)))))))))) | |
c22a1324 LC |
278 | |
279 | (define* (graft-derivation store drv grafts | |
482fda27 LC |
280 | #:key |
281 | (guile (%guile-for-build)) | |
282 | (outputs (derivation-output-names drv)) | |
c22a1324 | 283 | (system (%current-system))) |
482fda27 LC |
284 | "Apply GRAFTS to the OUTPUTS of DRV and all their dependencies, recursively. |
285 | That is, if GRAFTS apply only indirectly to DRV, graft the dependencies of | |
286 | DRV, and graft DRV itself to refer to those grafted dependencies." | |
d4da602e | 287 | (match (run-with-state |
4b75a706 | 288 | (cumulative-grafts store drv grafts |
482fda27 | 289 | #:outputs outputs |
d4da602e LC |
290 | #:guile guile #:system system) |
291 | vlist-null) ;the initial cache | |
c22a1324 LC |
292 | ((first . rest) |
293 | ;; If FIRST is not a graft for DRV, it means that GRAFTS are not | |
294 | ;; applicable to DRV and nothing needs to be done. | |
295 | (if (equal? drv (graft-origin first)) | |
296 | (graft-replacement first) | |
297 | drv)))) | |
7adf9b84 LC |
298 | |
299 | \f | |
300 | ;; The following might feel more at home in (guix packages) but since (guix | |
301 | ;; gexp), which is a lower level, needs them, we put them here. | |
302 | ||
303 | (define %graft? | |
304 | ;; Whether to honor package grafts by default. | |
305 | (make-parameter #t)) | |
306 | ||
307 | (define (set-grafting enable?) | |
308 | "This monadic procedure enables grafting when ENABLE? is true, and disables | |
309 | it otherwise. It returns the previous setting." | |
310 | (lambda (store) | |
311 | (values (%graft? enable?) store))) | |
312 | ||
c6080c32 LC |
313 | (define (grafting?) |
314 | "Return a Boolean indicating whether grafting is enabled." | |
315 | (lambda (store) | |
316 | (values (%graft?) store))) | |
317 | ||
d38bc9a9 LC |
318 | ;; Local Variables: |
319 | ;; eval: (put 'with-cache 'scheme-indent-function 1) | |
320 | ;; End: | |
321 | ||
7adf9b84 | 322 | ;;; grafts.scm ends here |