blob: b52599467285c3fde48f1f56b58f84261db854ac (
about) (
plain)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
238
239
240
241
242
243
244
245
246
247
248
249
250
251
252
253
254
255
256
257
258
259
260
261
262
263
264
265
266
267
268
269
270
271
272
273
274
275
276
277
278
279
280
281
282
283
284
285
286
287
288
289
290
291
292
293
294
295
296
297
298
299
300
301
302
303
304
305
306
307
308
309
310
311
312
313
314
315
316
317
318
319
320
321
322
323
324
325
326
327
328
329
330
331
332
333
334
335
336
337
338
339
340
341
342
343
344
345
346
347
348
349
350
351
352
353
354
355
356
357
358
359
360
361
362
363
364
365
366
367
368
369
370
371
372
373
374
375
376
377
378
379
380
381
382
383
384
385
386
387
388
389
390
391
392
393
394
395
396
397
398
399
400
401
402
403
404
405
406
407
408
409
410
411
412
413
414
415
416
417
418
419
|
;;; Guix --- Nix package management from Guile. -*- coding: utf-8 -*-
;;; Copyright (C) 2012 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of Guix.
;;;
;;; 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.
;;;
;;; 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 Guix. If not, see <http://www.gnu.org/licenses/>.
(define-module (guix store)
#:use-module (rnrs bytevectors)
#:use-module (rnrs io ports)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-9)
#:use-module (srfi srfi-26)
#:use-module (srfi srfi-34)
#:use-module (srfi srfi-35)
#:use-module (srfi srfi-39)
#:use-module (ice-9 match)
#:use-module (ice-9 rdelim)
#:use-module (ice-9 ftw)
#:export (nix-server?
nix-server-major-version
nix-server-minor-version
nix-server-socket
&nix-error nix-error?
&nix-protocol-error nix-protocol-error?
nix-protocol-error-message
nix-protocol-error-status
hash-algo
open-connection
set-build-options
valid-path?
add-text-to-store
add-to-store
build-derivations
current-build-output-port
%store-prefix
store-path?
derivation-path?))
(define %protocol-version #x109)
(define %worker-magic-1 #x6e697863)
(define %worker-magic-2 #x6478696f)
(define (protocol-major magic)
(logand magic #xff00))
(define (protocol-minor magic)
(logand magic #x00ff))
(define-syntax define-enumerate-type
(syntax-rules ()
((_ name->int (name id) ...)
(define-syntax name->int
(syntax-rules (name ...)
((_ name) id) ...)))))
(define-enumerate-type operation-id
;; operation numbers from worker-protocol.hh
(quit 0)
(valid-path? 1)
(has-substitutes? 3)
(query-path-hash 4)
(query-references 5)
(query-referrers 6)
(add-to-store 7)
(add-text-to-store 8)
(build-derivations 9)
(ensure-path 10)
(add-temp-root 11)
(add-indirect-root 12)
(sync-with-gc 13)
(find-roots 14)
(export-path 16)
(query-deriver 18)
(set-options 19)
(collect-garbage 20)
(query-substitutable-path-info 21)
(query-derivation-outputs 22)
(query-valid-paths 23)
(query-failed-paths 24)
(clear-failed-paths 25)
(query-path-info 26)
(import-paths 27)
(query-derivation-output-names 28))
(define-enumerate-type hash-algo
;; hash.hh
(md5 1)
(sha1 2)
(sha256 3))
(define %nix-state-dir "/nix/var/nix")
(define %default-socket-path
(string-append %nix-state-dir "/daemon-socket/socket"))
;; serialize.cc
(define (write-int n p)
(let ((b (make-bytevector 8 0)))
(bytevector-u32-set! b 0 n (endianness little))
(put-bytevector p b)))
(define (read-int p)
(let ((b (get-bytevector-n p 8)))
(bytevector-u32-ref b 0 (endianness little))))
(define (write-long-long n p)
(let ((b (make-bytevector 8 0)))
(bytevector-u64-set! b 0 n (endianness little))
(put-bytevector p b)))
(define write-padding
(let ((zero (make-bytevector 8 0)))
(lambda (n p)
(let ((m (modulo n 8)))
(or (zero? m)
(put-bytevector p zero 0 (- 8 m)))))))
(define (write-string s p)
(let ((b (string->utf8 s)))
(write-int (bytevector-length b) p)
(put-bytevector p b)
(write-padding (bytevector-length b) p)))
(define (read-string p)
(let* ((len (read-int p))
(m (modulo len 8))
(bv (get-bytevector-n p len))
(str (utf8->string bv)))
(or (zero? m)
(get-bytevector-n p (- 8 m)))
str))
(define (write-string-list l p)
(write-int (length l) p)
(for-each (cut write-string <> p) l))
(define (read-store-path p)
(read-string p)) ; TODO: assert path
(define (write-contents file p)
"Write the contents of FILE to output port P."
(define (dump in size)
(define buf-size 65536)
(define buf (make-bytevector buf-size))
(let loop ((left size))
(if (<= left 0)
0
(let ((read (get-bytevector-n! in buf 0 buf-size)))
(if (eof-object? read)
left
(begin
(put-bytevector p buf 0 read)
(loop (- left read))))))))
(let ((size (stat:size (lstat file))))
(write-string "contents" p)
(write-long-long size p)
(call-with-input-file file
(lambda (p)
(dump p size)))
(write-padding size p)))
(define (write-file f p)
(define %archive-version-1 "nix-archive-1")
(write-string %archive-version-1 p)
(let dump ((f f))
(let ((s (lstat f)))
(write-string "(" p)
(case (stat:type s)
((regular)
(write-string "type" p)
(write-string "regular" p)
(if (not (zero? (logand (stat:mode s) #o100)))
(begin
(write-string "executable" p)
(write-string "" p)))
(write-contents f p))
((directory)
(write-string "type" p)
(write-string "directory" p)
(let ((entries (remove (cut member <> '("." ".."))
(scandir f))))
(for-each (lambda (e)
(let ((f (string-append f "/" e)))
(write-string "entry" p)
(write-string "(" p)
(write-string "name" p)
(write-string e p)
(write-string "node" p)
(dump f)
(write-string ")" p)))
entries)))
(else
(error "ENOSYS")))
(write-string ")" p))))
(define-syntax write-arg
(syntax-rules (integer boolean file string string-list)
((_ integer arg p)
(write-int arg p))
((_ boolean arg p)
(write-int (if arg 1 0) p))
((_ file arg p)
(write-file arg p))
((_ string arg p)
(write-string arg p))
((_ string-list arg p)
(write-string-list arg p))))
(define-syntax read-arg
(syntax-rules (integer boolean string store-path)
((_ integer p)
(read-int p))
((_ boolean p)
(not (zero? (read-int p))))
((_ string p)
(read-string p))
((_ store-path p)
(read-store-path p))))
;; remote-store.cc
(define-record-type <nix-server>
(%make-nix-server socket major minor)
nix-server?
(socket nix-server-socket)
(major nix-server-major-version)
(minor nix-server-minor-version))
(define-condition-type &nix-error &error
nix-error?)
(define-condition-type &nix-protocol-error &nix-error
nix-protocol-error?
(message nix-protocol-error-message)
(status nix-protocol-error-status))
(define* (open-connection #:optional (file %default-socket-path))
(let ((s (with-fluids ((%default-port-encoding #f))
;; This trick allows use of the `scm_c_read' optimization.
(socket PF_UNIX SOCK_STREAM 0)))
(a (make-socket-address PF_UNIX file)))
(connect s a)
(write-int %worker-magic-1 s)
(let ((r (read-int s)))
(and (eqv? r %worker-magic-2)
(let ((v (read-int s)))
(and (eqv? (protocol-major %protocol-version)
(protocol-major v))
(begin
(write-int %protocol-version s)
(let ((s (%make-nix-server s
(protocol-major v)
(protocol-minor v))))
(process-stderr s)
s))))))))
(define current-build-output-port
;; The port where build output is sent.
(make-parameter (current-error-port)))
(define (process-stderr server)
"Read standard output and standard error from SERVER, writing it to
CURRENT-BUILD-OUTPUT-PORT. Return #t when SERVER is done sending data, and
#f otherwise; in the latter case, the caller should call `process-stderr'
again until #t is returned or an error is raised."
(define p
(nix-server-socket server))
;; magic cookies from worker-protocol.hh
(define %stderr-next #x6f6c6d67)
(define %stderr-read #x64617461) ; data needed from source
(define %stderr-write #x64617416) ; data for sink
(define %stderr-last #x616c7473)
(define %stderr-error #x63787470)
(let ((k (read-int p)))
(cond ((= k %stderr-write)
(read-string p)
#f)
((= k %stderr-read)
(let ((len (read-int p)))
(read-string p) ; FIXME: what to do?
#f))
((= k %stderr-next)
(let ((s (read-string p)))
(display s (current-build-output-port))
#f))
((= k %stderr-error)
(let ((error (read-string p))
(status (if (>= (nix-server-minor-version server) 8)
(read-int p)
1)))
(raise (condition (&nix-protocol-error
(message error)
(status status))))))
((= k %stderr-last)
;; The daemon is done (see `stopWork' in `nix-worker.cc'.)
#t)
(else
(raise (condition (&nix-protocol-error
(message "invalid error code")
(status k))))))))
(define* (set-build-options server
#:key keep-failed? keep-going? try-fallback?
(verbosity 0)
(max-build-jobs (current-processor-count))
(max-silent-time 3600)
(use-build-hook? #t)
(build-verbosity 0)
(log-type 0)
(print-build-trace #t)
(build-cores 1)
(use-substitutes? #t))
;; Must be called after `open-connection'.
(define socket
(nix-server-socket server))
(let-syntax ((send (syntax-rules ()
((_ (type option) ...)
(begin
(write-arg type option socket)
...)))))
(write-int (operation-id set-options) socket)
(send (boolean keep-failed?) (boolean keep-going?)
(boolean try-fallback?) (integer verbosity)
(integer max-build-jobs) (integer max-silent-time))
(if (>= (nix-server-minor-version server) 2)
(send (boolean use-build-hook?)))
(if (>= (nix-server-minor-version server) 4)
(send (integer build-verbosity) (integer log-type)
(boolean print-build-trace)))
(if (>= (nix-server-minor-version server) 6)
(send (integer build-cores)))
(if (>= (nix-server-minor-version server) 10)
(send (boolean use-substitutes?)))
(let loop ((done? (process-stderr server)))
(or done? (process-stderr server)))))
(define-syntax define-operation
(syntax-rules ()
((_ (name (type arg) ...) docstring return)
(define (name server arg ...)
docstring
(let ((s (nix-server-socket server)))
(write-int (operation-id name) s)
(write-arg type arg s)
...
;; Loop until the server is done sending error output.
(let loop ((done? (process-stderr server)))
(or done? (loop (process-stderr server))))
(read-arg return s))))))
(define-operation (valid-path? (string path))
"Return #t when PATH is a valid store path."
boolean)
(define-operation (add-text-to-store (string name) (string text)
(string-list references))
"Add TEXT under file NAME in the store."
store-path)
(define-operation (add-to-store (string basename)
(boolean fixed?) ; obsolete, must be #t
(boolean recursive?)
(string hash-algo)
(file file-name))
"Add the contents of FILE-NAME under BASENAME to the store."
store-path)
(define-operation (build-derivations (string-list derivations))
"Build DERIVATIONS, and return when the worker is done building them.
Return #t on success."
boolean)
;;;
;;; Store paths.
;;;
(define %store-prefix
;; Absolute path to the Nix store.
(make-parameter "/nix/store"))
(define store-path?
(let ((store-path-rx
(delay (make-regexp
(string-append "^.*" (%store-prefix) "/[^-]{32}-(.+)$")))))
(lambda (path)
"Return #t if PATH is a store path."
(not (not (regexp-exec (force store-path-rx) path))))))
(define (derivation-path? path)
"Return #t if PATH is a derivation path."
(and (store-path? path) (string-suffix? ".drv" path)))
|