1 ;;; GNU Guix --- Functional package management for GNU
2 ;;; Copyright © 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019, 2020, 2021 Ludovic Courtès <ludo@gnu.org>
3 ;;; Copyright © 2018 Jan Nieuwenhuizen <janneke@gnu.org>
4 ;;; Copyright © 2019, 2020 Mathieu Othacehe <m.othacehe@gmail.com>
5 ;;; Copyright © 2020 Florian Pelz <pelzflorian@pelzflorian.de>
6 ;;; Copyright © 2020 Lars-Dominik Braun <ldb@leibniz-psychology.org>
8 ;;; This file is part of GNU Guix.
10 ;;; GNU Guix is free software; you can redistribute it and/or modify it
11 ;;; under the terms of the GNU General Public License as published by
12 ;;; the Free Software Foundation; either version 3 of the License, or (at
13 ;;; your option) any later version.
15 ;;; GNU Guix is distributed in the hope that it will be useful, but
16 ;;; WITHOUT ANY WARRANTY; without even the implied warranty of
17 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
18 ;;; GNU General Public License for more details.
20 ;;; You should have received a copy of the GNU General Public License
21 ;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
23 (define-module (guix store)
24 #:use-module (guix utils)
25 #:use-module (guix config)
26 #:use-module (guix deprecation)
27 #:use-module (guix memoization)
28 #:use-module (guix serialization)
29 #:use-module (guix monads)
30 #:use-module (guix records)
31 #:use-module (guix base16)
32 #:use-module (guix base32)
33 #:use-module (gcrypt hash)
34 #:use-module (guix profiling)
35 #:autoload (guix build syscalls) (terminal-columns)
36 #:use-module (rnrs bytevectors)
37 #:use-module (ice-9 binary-ports)
38 #:use-module ((ice-9 control) #:select (let/ec))
39 #:use-module (srfi srfi-1)
40 #:use-module (srfi srfi-9)
41 #:use-module (srfi srfi-9 gnu)
42 #:use-module (srfi srfi-11)
43 #:use-module (srfi srfi-26)
44 #:use-module (srfi srfi-34)
45 #:use-module (srfi srfi-35)
46 #:use-module (srfi srfi-39)
47 #:use-module (ice-9 match)
48 #:use-module (ice-9 vlist)
49 #:use-module (ice-9 popen)
50 #:use-module (ice-9 threads)
51 #:use-module (ice-9 format)
52 #:use-module (web uri)
53 #:export (%daemon-socket-uri
55 %default-substitute-urls
58 store-connection-version
59 store-connection-major-version
60 store-connection-minor-version
61 store-connection-socket
63 ;; Deprecated forms for 'store-connection'.
66 nix-server-major-version
67 nix-server-minor-version
70 current-store-protocol-version ;for internal use
73 &store-error store-error?
74 &store-connection-error store-connection-error?
75 store-connection-error-file
76 store-connection-error-code
77 &store-protocol-error store-protocol-error?
78 store-protocol-error-message
79 store-protocol-error-status
81 ;; Deprecated forms for '&store-error' et al.
83 &nix-connection-error nix-connection-error?
84 nix-connection-error-file
85 nix-connection-error-code
86 &nix-protocol-error nix-protocol-error?
87 nix-protocol-error-message
88 nix-protocol-error-status
106 add-file-tree-to-store
110 map/accumulate-builds
111 mapm/accumulate-builds
121 remove-permanent-root
125 substitutable-deriver
126 substitutable-references
127 substitutable-download-size
128 substitutable-nar-size
131 substitutable-path-info
137 path-info-registration-time
143 references/substitutes
152 query-derivation-outputs
160 current-build-output-port
171 current-target-system
185 store-path-package-name
191 (define %protocol-version #x163)
193 (define %worker-magic-1 #x6e697863) ; "nixc"
194 (define %worker-magic-2 #x6478696f) ; "dxio"
196 (define (protocol-major magic)
197 (logand magic #xff00))
198 (define (protocol-minor magic)
199 (logand magic #x00ff))
200 (define (protocol-version major minor)
201 (logior major minor))
203 (define-syntax define-enumerate-type
205 ((_ name->int (name id) ...)
206 (define-syntax name->int
207 (syntax-rules (name ...)
208 ((_ name) id) ...)))))
210 (define-enumerate-type operation-id
211 ;; operation numbers from worker-protocol.hh
219 (add-text-to-store 8)
223 (add-indirect-root 12)
230 ;;(query-substitutable-path-info 21) ; obsolete as of #x10c
231 (query-derivation-outputs 22)
232 (query-all-valid-paths 23)
233 (query-failed-paths 24)
234 (clear-failed-paths 25)
237 (query-derivation-output-names 28)
238 (query-path-from-hash-part 29)
239 (query-substitutable-path-infos 30)
240 (query-valid-paths 31)
241 (query-substitutable-paths 32)
242 (query-valid-derivers 33)
245 (built-in-builders 80))
247 (define-enumerate-type hash-algo
253 (define-enumerate-type build-mode
259 (define-enumerate-type gc-action
266 (define %default-socket-path
267 (string-append %state-directory "/daemon-socket/socket"))
269 (define %daemon-socket-uri
270 ;; URI or file name of the socket the daemon listens too.
271 (make-parameter (or (getenv "GUIX_DAEMON_SOCKET")
272 %default-socket-path)))
276 ;; Information about a substitutable store path.
277 (define-record-type <substitutable>
278 (substitutable path deriver refs dl-size nar-size)
280 (path substitutable-path)
281 (deriver substitutable-deriver)
282 (refs substitutable-references)
283 (dl-size substitutable-download-size)
284 (nar-size substitutable-nar-size))
286 (define (read-substitutable-path-list p)
287 (let loop ((len (read-int p))
291 (let ((path (read-store-path p))
292 (deriver (read-store-path p))
293 (refs (read-store-path-list p))
294 (dl-size (read-long-long p))
295 (nar-size (read-long-long p)))
297 (cons (substitutable path deriver refs dl-size nar-size)
300 ;; Information about a store path.
301 (define-record-type <path-info>
302 (path-info deriver hash references registration-time nar-size)
304 (deriver path-info-deriver) ;string | #f
305 (hash path-info-hash)
306 (references path-info-references)
307 (registration-time path-info-registration-time)
308 (nar-size path-info-nar-size))
310 (define (read-path-info p)
311 (let ((deriver (match (read-store-path p)
314 (hash (base16-string->bytevector (read-string p)))
315 (refs (read-store-path-list p))
316 (registration-time (read-int p))
317 (nar-size (read-long-long p)))
318 (path-info deriver hash refs registration-time nar-size)))
320 (define-syntax write-arg
321 (syntax-rules (integer boolean bytevector
322 string string-list string-pairs
323 store-path store-path-list base16)
327 (write-int (if arg 1 0) p))
328 ((_ bytevector arg p)
329 (write-bytevector arg p))
331 (write-string arg p))
332 ((_ string-list arg p)
333 (write-string-list arg p))
334 ((_ string-pairs arg p)
335 (write-string-pairs arg p))
336 ((_ store-path arg p)
337 (write-store-path arg p))
338 ((_ store-path-list arg p)
339 (write-store-path-list arg p))
341 (write-string (bytevector->base16-string arg) p))))
343 (define-syntax read-arg
344 (syntax-rules (integer boolean string store-path
345 store-path-list string-list string-pairs
346 substitutable-path-list path-info base16)
350 (not (zero? (read-int p))))
355 ((_ store-path-list p)
356 (read-store-path-list p))
358 (read-string-list p))
360 (read-string-pairs p))
361 ((_ substitutable-path-list p)
362 (read-substitutable-path-list p))
366 (base16-string->bytevector (read-string p)))))
371 (define-record-type* <store-connection> store-connection %make-store-connection
373 (socket store-connection-socket)
374 (major store-connection-major-version)
375 (minor store-connection-minor-version)
377 (buffer store-connection-output-port) ;output port
378 (flush store-connection-flush-output) ;thunk
380 ;; Caches. We keep them per-connection, because store paths build
381 ;; during the session are temporary GC roots kept for the duration of
383 (ats-cache store-connection-add-to-store-cache)
384 (atts-cache store-connection-add-text-to-store-cache)
385 (object-cache store-connection-object-cache
386 (default vlist-null)) ;vhash
387 (built-in-builders store-connection-built-in-builders
388 (default (delay '())))) ;promise
390 (set-record-type-printer! <store-connection>
392 (format port "#<store-connection ~a.~a ~a>"
393 (store-connection-major-version obj)
394 (store-connection-minor-version obj)
395 (number->string (object-address obj)
398 (define-deprecated/alias nix-server? store-connection?)
399 (define-deprecated/alias nix-server-major-version
400 store-connection-major-version)
401 (define-deprecated/alias nix-server-minor-version
402 store-connection-minor-version)
403 (define-deprecated/alias nix-server-socket store-connection-socket)
406 (define-condition-type &store-error &error
409 (define-condition-type &store-connection-error &store-error
410 store-connection-error?
411 (file store-connection-error-file)
412 (errno store-connection-error-code))
414 (define-condition-type &store-protocol-error &store-error
415 store-protocol-error?
416 (message store-protocol-error-message)
417 (status store-protocol-error-status))
419 (define-deprecated/alias &nix-error &store-error)
420 (define-deprecated/alias nix-error? store-error?)
421 (define-deprecated/alias &nix-connection-error &store-connection-error)
422 (define-deprecated/alias nix-connection-error? store-connection-error?)
423 (define-deprecated/alias nix-connection-error-file
424 store-connection-error-file)
425 (define-deprecated/alias nix-connection-error-code
426 store-connection-error-code)
427 (define-deprecated/alias &nix-protocol-error &store-protocol-error)
428 (define-deprecated/alias nix-protocol-error? store-protocol-error?)
429 (define-deprecated/alias nix-protocol-error-message
430 store-protocol-error-message)
431 (define-deprecated/alias nix-protocol-error-status
432 store-protocol-error-status)
435 (define-syntax-rule (system-error-to-connection-error file exp ...)
436 "Catch 'system-error' exceptions and translate them to
437 '&store-connection-error'."
442 (let ((errno (system-error-errno args)))
443 (raise (condition (&store-connection-error
447 (define (open-unix-domain-socket file)
448 "Connect to the Unix-domain socket at FILE and return it. Raise a
449 '&store-connection-error' upon error."
450 (let ((s (with-fluids ((%default-port-encoding #f))
451 ;; This trick allows use of the `scm_c_read' optimization.
452 (socket PF_UNIX SOCK_STREAM 0)))
453 (a (make-socket-address PF_UNIX file)))
455 (system-error-to-connection-error file
459 (define %default-guix-port
460 ;; Default port when connecting to a daemon over TCP/IP.
463 (define (open-inet-socket host port)
464 "Connect to the Unix-domain socket at HOST:PORT and return it. Raise a
465 '&store-connection-error' upon error."
466 (let ((sock (with-fluids ((%default-port-encoding #f))
467 ;; This trick allows use of the `scm_c_read' optimization.
468 (socket PF_UNIX SOCK_STREAM 0))))
471 (if (number? port) (number->string port) port)
473 (logior AI_ADDRCONFIG AI_NUMERICSERV)
475 0 ;any address family
476 SOCK_STREAM)) ;TCP only
478 (let loop ((addresses addresses))
481 (let ((s (socket (addrinfo:fam ai)
483 SOCK_STREAM IPPROTO_IP)))
487 (connect s (addrinfo:addr ai))
489 ;; Setting this option makes a dramatic difference because it
490 ;; avoids the "ACK delay" on our RPC messages.
491 (setsockopt s IPPROTO_TCP TCP_NODELAY 1)
494 ;; Connection failed, so try one of the other addresses.
497 (raise (condition (&store-connection-error
499 (errno (system-error-errno args)))))
502 (define (connect-to-daemon uri)
503 "Connect to the daemon at URI, a string that may be an actual URI or a file
505 (define (not-supported)
506 (raise (condition (&store-connection-error
511 (match (string->uri uri)
512 (#f ;URI is a file name
513 open-unix-domain-socket)
515 (match (uri-scheme uri)
518 (open-unix-domain-socket (uri-path uri))))
521 (open-inet-socket (uri-host uri)
522 (or (uri-port uri) %default-guix-port))))
524 ;; Try to dynamically load a module for SCHEME.
525 ;; XXX: Errors are swallowed.
526 (match (false-if-exception
527 (resolve-interface `(guix store ,scheme)))
529 (match (false-if-exception
530 (module-ref module 'connect-to-daemon))
531 ((? procedure? connect)
534 (x (not-supported))))
535 (#f (not-supported))))
541 (define* (open-connection #:optional (uri (%daemon-socket-uri))
542 #:key port (reserve-space? #t) cpu-affinity)
543 "Connect to the daemon at URI (a string), or, if PORT is not #f, use it as
544 the I/O port over which to communicate to a build daemon.
546 When RESERVE-SPACE? is true, instruct it to reserve a little bit of extra
547 space on the file system so that the garbage collector can still operate,
548 should the disk become full. When CPU-AFFINITY is true, it must be an integer
549 corresponding to an OS-level CPU number to which the daemon's worker process
550 for this connection will be pinned. Return a server object."
551 (guard (c ((nar-error? c)
552 ;; One of the 'write-' or 'read-' calls below failed, but this is
553 ;; really a connection error.
555 (&store-connection-error (file (or port uri))
557 (&message (message "build daemon handshake failed"))))))
558 (let*-values (((port)
559 (or port (connect-to-daemon uri)))
561 (buffering-output-port port
562 (make-bytevector 8192))))
563 (write-int %worker-magic-1 port)
564 (let ((r (read-int port)))
565 (and (= r %worker-magic-2)
566 (let ((v (read-int port)))
567 (and (= (protocol-major %protocol-version)
570 (write-int %protocol-version port)
571 (when (>= (protocol-minor v) 14)
572 (write-int (if cpu-affinity 1 0) port)
574 (write-int cpu-affinity port)))
575 (when (>= (protocol-minor v) 11)
576 (write-int (if reserve-space? 1 0) port))
577 (letrec* ((built-in-builders
578 (delay (%built-in-builders conn)))
580 (%make-store-connection port
584 (make-hash-table 100)
585 (make-hash-table 100)
588 (let loop ((done? (process-stderr conn)))
589 (or done? (process-stderr conn)))
592 (define* (port->connection port
593 #:key (version %protocol-version))
594 "Assimilate PORT, an input/output port, and return a connection to the
595 daemon, assuming the given protocol VERSION.
597 Warning: this procedure assumes that the initial handshake with the daemon has
598 already taken place on PORT and that we're just continuing on this established
599 connection. Use with care."
600 (let-values (((output flush)
601 (buffering-output-port port (make-bytevector 8192))))
603 (%make-store-connection port
604 (protocol-major version)
605 (protocol-minor version)
607 (make-hash-table 100)
608 (make-hash-table 100)
610 (delay (%built-in-builders connection))))
614 (define (store-connection-version store)
615 "Return the protocol version of STORE as an integer."
616 (protocol-version (store-connection-major-version store)
617 (store-connection-minor-version store)))
619 (define-deprecated/alias nix-server-version store-connection-version)
621 (define (write-buffered-output server)
622 "Flush SERVER's output port."
623 (force-output (store-connection-output-port server))
624 ((store-connection-flush-output server)))
626 (define (close-connection server)
627 "Close the connection to SERVER."
628 (close (store-connection-socket server)))
630 (define (call-with-store proc)
631 "Call PROC with an open store connection."
632 (let ((store (open-connection)))
634 (parameterize ((current-store-protocol-version
635 (store-connection-version store)))
636 (call-with-values (lambda () (proc store))
638 (close-connection store)
639 (apply values results)))))
643 (with-exception-handler (lambda (exception)
644 (close-connection store)
645 (raise-exception exception))
651 (close-connection store)
652 (apply throw key args)))))))
654 (define-syntax-rule (with-store store exp ...)
655 "Bind STORE to an open connection to the store and evaluate EXPs;
656 automatically close the store when the dynamic extent of EXP is left."
657 (call-with-store (lambda (store) exp ...)))
659 (define current-store-protocol-version
660 ;; Protocol version of the store currently used. XXX: This is a hack to
661 ;; communicate the protocol version to the build output port. It's a hack
662 ;; because it could be inaccurrate, for instance if there's code that
663 ;; manipulates several store connections at once; it works well for the
664 ;; purposes of (guix status) though.
667 (define current-build-output-port
668 ;; The port where build output is sent.
669 (make-parameter (current-error-port)))
671 (define* (dump-port in out
673 #:key (buffer-size 16384))
674 "Read LEN bytes from IN (or as much as possible if LEN is #f) and write it
675 to OUT, using chunks of BUFFER-SIZE bytes."
677 (make-bytevector buffer-size))
680 (bytes (get-bytevector-n! in buffer 0
682 (min len buffer-size)
684 (or (eof-object? bytes)
685 (and len (= total len))
686 (let ((total (+ total bytes)))
687 (put-bytevector out buffer 0 bytes)
689 (get-bytevector-n! in buffer 0
691 (min (- len total) buffer-size)
695 ;; Newline characters triggering a flush of 'current-build-output-port'.
696 ;; Unlike Guile's 'line, we flush upon #\return so that progress reports
697 ;; that use that trick are correctly displayed.
698 (char-set #\newline #\return))
700 (define* (process-stderr server #:optional user-port)
701 "Read standard output and standard error from SERVER, writing it to
702 CURRENT-BUILD-OUTPUT-PORT. Return #t when SERVER is done sending data, and
703 #f otherwise; in the latter case, the caller should call `process-stderr'
704 again until #t is returned or an error is raised.
706 Since the build process's output cannot be assumed to be UTF-8, we
707 conservatively consider it to be Latin-1, thereby avoiding possible
708 encoding conversion errors."
710 (store-connection-socket server))
712 ;; magic cookies from worker-protocol.hh
713 (define %stderr-next #x6f6c6d67) ; "olmg", build log
714 (define %stderr-read #x64617461) ; "data", data needed from source
715 (define %stderr-write #x64617416) ; "dat\x16", data for sink
716 (define %stderr-last #x616c7473) ; "alts", we're done
717 (define %stderr-error #x63787470) ; "cxtp", error reporting
719 (let ((k (read-int p)))
720 (cond ((= k %stderr-write)
721 ;; Write a byte stream to USER-PORT.
722 (let* ((len (read-int p))
724 (dump-port p user-port len
725 #:buffer-size (if (<= len 16384) 16384 65536))
727 ;; Consume padding, as for strings.
728 (get-bytevector-n p (- 8 m))))
731 ;; Read a byte stream from USER-PORT.
732 ;; Note: Avoid 'get-bytevector-n' to work around
733 ;; <http://bugs.gnu.org/17591> in Guile up to 2.0.11.
734 (let* ((max-len (read-int p))
735 (data (make-bytevector max-len))
736 (len (get-bytevector-n! user-port data 0 max-len)))
737 (write-bytevector data p len)
740 ;; Log a string. Build logs are usually UTF-8-encoded, but they
741 ;; may also contain arbitrary byte sequences that should not cause
742 ;; this to fail. Thus, use the permissive
743 ;; 'read-maybe-utf8-string'.
744 (let ((s (read-maybe-utf8-string p)))
745 (display s (current-build-output-port))
746 (when (string-any %newlines s)
747 (force-output (current-build-output-port)))
751 (let ((error (read-maybe-utf8-string p))
752 ;; Currently the daemon fails to send a status code for early
753 ;; errors like DB schema version mismatches, so check for EOF.
754 (status (if (and (>= (store-connection-minor-version server) 8)
755 (not (eof-object? (lookahead-u8 p))))
758 (raise (condition (&store-protocol-error
762 ;; The daemon is done (see `stopWork' in `nix-worker.cc'.)
765 (raise (condition (&store-protocol-error
766 (message "invalid error code")
769 (define %default-substitute-urls
770 ;; Default list of substituters. This is *not* the list baked in
771 ;; 'guix-daemon', but it is used by 'guix-service-type' and and a couple of
772 ;; clients ('guix build --log-file' uses it.)
773 (map (if (false-if-exception (resolve-interface '(gnutls)))
774 (cut string-append "https://" <>)
775 (cut string-append "http://" <>))
776 '("ci.guix.gnu.org")))
778 (define (current-user-name)
779 "Return the name of the calling user."
782 (passwd:name (getpwuid (getuid))))
786 (define* (set-build-options server
787 #:key keep-failed? keep-going? fallback?
789 rounds ;number of build rounds
794 (use-build-hook? *unspecified*) ;deprecated
797 (print-build-trace #t)
798 (user-name (current-user-name))
800 ;; When true, provide machine-readable "build
801 ;; traces" for use by (guix status). Old clients
802 ;; are unable to make sense, which is why it's
803 ;; disabled by default.
804 print-extended-build-trace?
806 ;; When true, the daemon prefixes builder output
807 ;; with "@ build-log" traces so we can
808 ;; distinguish it from daemon output, and we can
809 ;; distinguish each builder's output
810 ;; (PRINT-BUILD-TRACE must be true as well.) The
811 ;; latter is particularly useful when
812 ;; MAX-BUILD-JOBS > 1.
813 multiplexed-build-output?
816 (use-substitutes? #t)
818 ;; Client-provided substitute URLs. If it is #f,
819 ;; the daemon's settings are used. Otherwise, it
820 ;; overrides the daemons settings; see 'guix
824 ;; Number of columns in the client's terminal.
825 (terminal-columns (terminal-columns))
827 ;; Locale of the client.
828 (locale (false-if-exception (setlocale LC_MESSAGES))))
829 ;; Must be called after `open-connection'.
832 (store-connection-output-port server))
834 (unless (unspecified? use-build-hook?)
835 (warn-about-deprecation #:use-build-hook? #f
836 #:replacement #:offload?))
838 (let-syntax ((send (syntax-rules ()
839 ((_ (type option) ...)
841 (write-arg type option buffered)
843 (write-int (operation-id set-options) buffered)
844 (send (boolean keep-failed?) (boolean keep-going?)
845 (boolean fallback?) (integer verbosity))
846 (when (< (store-connection-minor-version server) #x61)
847 (let ((max-build-jobs (or max-build-jobs 1))
848 (max-silent-time (or max-silent-time 3600)))
849 (send (integer max-build-jobs) (integer max-silent-time))))
850 (when (>= (store-connection-minor-version server) 2)
851 (send (boolean (if (unspecified? use-build-hook?)
854 (when (>= (store-connection-minor-version server) 4)
855 (send (integer build-verbosity) (integer log-type)
856 (boolean print-build-trace)))
857 (when (and (>= (store-connection-minor-version server) 6)
858 (< (store-connection-minor-version server) #x61))
859 (let ((build-cores (or build-cores (current-processor-count))))
860 (send (integer build-cores))))
861 (when (>= (store-connection-minor-version server) 10)
862 (send (boolean use-substitutes?)))
863 (when (>= (store-connection-minor-version server) 12)
864 (let ((pairs `(;; This option is honored by 'guix substitute' et al.
865 ,@(if print-build-trace
866 `(("print-extended-build-trace"
867 . ,(if print-extended-build-trace? "1" "0")))
869 ,@(if multiplexed-build-output?
870 `(("multiplexed-build-output"
871 . ,(if multiplexed-build-output? "true" "false")))
874 `(("build-timeout" . ,(number->string timeout)))
876 ,@(if max-silent-time
877 `(("build-max-silent-time"
878 . ,(number->string max-silent-time)))
882 . ,(number->string max-build-jobs)))
885 `(("build-cores" . ,(number->string build-cores)))
887 ,@(if substitute-urls
889 . ,(string-join substitute-urls)))
893 . ,(number->string (max 0 (1- rounds)))))
896 `(("user-name" . ,user-name))
898 ,@(if terminal-columns
899 `(("terminal-columns"
900 . ,(number->string terminal-columns)))
903 `(("locale" . ,locale))
905 (send (string-pairs pairs))))
906 (write-buffered-output server)
907 (let loop ((done? (process-stderr server)))
908 (or done? (process-stderr server)))))
910 (define (buffering-output-port port buffer)
911 "Return two value: an output port wrapped around PORT that uses BUFFER (a
912 bytevector) as its internal buffer, and a thunk to flush this output port."
913 ;; Note: In Guile 2.2.2, custom binary output ports already have their own
914 ;; 4K internal buffer.
916 (bytevector-length buffer))
921 (put-bytevector port buffer 0 total)
925 (define (write bv offset count)
926 (if (zero? count) ;end of file
928 (let loop ((offset offset)
931 (cond ((= total size)
933 (loop offset count written))
937 (let ((to-copy (min count (- size total))))
938 (bytevector-copy! bv offset buffer total to-copy)
939 (set! total (+ total to-copy))
940 (loop (+ offset to-copy) (- count to-copy)
941 (+ written to-copy))))))))
943 ;; Note: We need to return FLUSH because the custom binary port has no way
944 ;; to be notified of a 'force-output' call on itself.
945 (values (make-custom-binary-output-port "buffering-output-port"
951 (or (and=> (getenv "GUIX_PROFILING") string-tokenize)
954 "Return true if COMPONENT profiling is active."
955 (member component profiled))))
958 ;; Mapping from RPC names (symbols) to invocation counts.
961 (define* (show-rpc-profile #:optional (port (current-error-port)))
962 "Write to PORT a summary of the RPCs that have been made."
963 (let ((profile (sort (hash-fold alist-cons '() %rpc-calls)
965 (< (cdr rpc1) (cdr rpc2))))))
966 (format port "Remote procedure call summary: ~a RPCs~%"
968 (((names . counts) ...)
969 (reduce + 0 counts))))
970 (for-each (match-lambda
972 (format port " ~30a ... ~5@a~%" rpc count)))
975 (define record-operation
976 ;; Optionally, increment the number of calls of the given RPC.
977 (if (profiled? "rpc")
979 (register-profiling-hook! "rpc" show-rpc-profile)
981 (let ((count (or (hashq-ref %rpc-calls name) 0)))
982 (hashq-set! %rpc-calls name (+ count 1)))))
986 (define-syntax operation
988 "Define a client-side RPC stub for the given operation."
989 ((_ (name (type arg) ...) docstring return ...)
990 (lambda (server arg ...)
992 (let* ((s (store-connection-socket server))
993 (buffered (store-connection-output-port server)))
994 (record-operation 'name)
995 (write-int (operation-id name) buffered)
996 (write-arg type arg buffered)
998 (write-buffered-output server)
1000 ;; Loop until the server is done sending error output.
1001 (let loop ((done? (process-stderr server)))
1002 (or done? (loop (process-stderr server))))
1003 (values (read-arg return s) ...))))))
1005 (define-syntax-rule (define-operation (name args ...)
1006 docstring return ...)
1008 (operation (name args ...) docstring return ...)))
1010 (define-operation (valid-path? (string path))
1011 "Return #t when PATH designates a valid store item and #f otherwise (an
1012 invalid item may exist on disk but still be invalid, for instance because it
1013 is the result of an aborted or failed build.)
1015 A '&store-protocol-error' condition is raised if PATH is not prefixed by the
1016 store directory (/gnu/store)."
1019 (define-operation (query-path-hash (store-path path))
1020 "Return the SHA256 hash of the nar serialization of PATH as a bytevector."
1023 (define hash-part->path
1024 (let ((query-path-from-hash-part
1025 (operation (query-path-from-hash-part (string hash))
1028 (lambda (server hash-part)
1029 "Return the store path whose hash part is HASH-PART (a nix-base32
1030 string). Return the empty string if no such path exists."
1031 ;; This RPC is primarily used by Hydra to reply to HTTP GETs of
1033 (query-path-from-hash-part server hash-part))))
1035 (define-operation (query-path-info (store-path path))
1036 "Return the info (hash, references, etc.) for PATH."
1039 (define add-data-to-store
1040 ;; A memoizing version of `add-to-store', to avoid repeated RPCs with
1041 ;; the very same arguments during a given session.
1042 (let ((add-text-to-store
1043 (operation (add-text-to-store (string name) (bytevector text)
1044 (string-list references))
1047 (lookup (if (profiled? "add-data-to-store-cache")
1052 (define (show-stats)
1056 (* 100. (/ n lookups))))
1058 (format (current-error-port) "
1059 'add-data-to-store' cache:
1062 .drv files: ~5@a (~,1f%)
1063 Scheme files: ~5@a (~,1f%)~%"
1064 lookups hits (% hits)
1068 (register-profiling-hook! "add-data-to-store-cache"
1070 (lambda (cache args)
1071 (let ((result (hash-ref cache args)))
1072 (set! lookups (+ 1 lookups))
1074 (set! hits (+ 1 hits)))
1077 (cond ((string-suffix? ".drv" name)
1078 (set! drv (+ drv 1)))
1079 ((string-suffix? "-builder" name)
1080 (set! scheme (+ scheme 1)))
1081 ((string-suffix? ".scm" name)
1082 (set! scheme (+ scheme 1))))))
1085 (lambda* (server name bytes #:optional (references '()))
1086 "Add BYTES under file NAME in the store, and return its store path.
1087 REFERENCES is the list of store paths referred to by the resulting store
1089 (let* ((args `(,bytes ,name ,references))
1090 (cache (store-connection-add-text-to-store-cache server)))
1091 (or (lookup cache args)
1092 (let ((path (add-text-to-store server name bytes references)))
1093 (hash-set! cache args path)
1096 (define* (add-text-to-store store name text #:optional (references '()))
1097 "Add TEXT under file NAME in the store, and return its store path.
1098 REFERENCES is the list of store paths referred to by the resulting store
1100 (add-data-to-store store name (string->utf8 text) references))
1103 ;; Define it once and for all since we use it as a default value for
1104 ;; 'add-to-store' and want to make sure two default values are 'eq?' for the
1105 ;; purposes or memoization.
1109 (define add-to-store
1110 ;; A memoizing version of `add-to-store'. This is important because
1111 ;; `add-to-store' leads to huge data transfers to the server, and
1112 ;; because it's often called many times with the very same argument.
1114 (lambda* (server basename recursive? hash-algo file-name
1115 #:key (select? true))
1116 ;; We don't use the 'operation' macro so we can pass SELECT? to
1118 (record-operation 'add-to-store)
1119 (let ((port (store-connection-socket server))
1120 (buffered (store-connection-output-port server)))
1121 (write-int (operation-id add-to-store) buffered)
1122 (write-string basename buffered)
1123 (write-int 1 buffered) ;obsolete, must be #t
1124 (write-int (if recursive? 1 0) buffered)
1125 (write-string hash-algo buffered)
1126 (write-file file-name buffered #:select? select?)
1127 (write-buffered-output server)
1128 (let loop ((done? (process-stderr server)))
1129 (or done? (loop (process-stderr server))))
1130 (read-store-path port)))))
1131 (lambda* (server basename recursive? hash-algo file-name
1132 #:key (select? true))
1133 "Add the contents of FILE-NAME under BASENAME to the store. When
1134 RECURSIVE? is false, FILE-NAME must designate a regular file--not a directory
1135 nor a symlink. When RECURSIVE? is true and FILE-NAME designates a directory,
1136 the contents of FILE-NAME are added recursively; if FILE-NAME designates a
1137 flat file and RECURSIVE? is true, its contents are added, and its permission
1138 bits are kept. HASH-ALGO must be a string such as \"sha256\".
1140 When RECURSIVE? is true, call (SELECT? FILE STAT) for each directory entry,
1141 where FILE is the entry's absolute file name and STAT is the result of
1142 'lstat'; exclude entries for which SELECT? does not return true."
1143 ;; Note: We don't stat FILE-NAME at each call, and thus we assume that
1144 ;; the file remains unchanged for the lifetime of SERVER.
1145 (let* ((args `(,file-name ,basename ,recursive? ,hash-algo ,select?))
1146 (cache (store-connection-add-to-store-cache server)))
1147 (or (hash-ref cache args)
1148 (let ((path (add-to-store server basename recursive?
1150 #:select? select?)))
1151 (hash-set! cache args path)
1155 (char-set-complement (char-set #\/)))
1157 (define* (add-file-tree-to-store server tree
1159 (hash-algo "sha256")
1161 "Add the given TREE to the store on SERVER. TREE must be an entry such as:
1163 (\"my-tree\" directory
1164 (\"a\" regular (data \"hello\"))
1165 (\"b\" symlink \"a\")
1167 (\"d\" executable (file \"/bin/sh\"))))
1169 This is a generalized version of 'add-to-store'. It allows you to reproduce
1170 an arbitrary directory layout in the store without creating a derivation."
1172 ;; Note: The format of TREE was chosen to allow trees to be compared with
1173 ;; 'equal?', which in turn allows us to memoize things.
1176 ;; TREE is a single entry.
1183 (define (lookup file)
1184 (let loop ((components (string-tokenize file %not-slash))
1188 (assoc basename tree))
1191 (match (assoc-ref tree head)
1192 (('directory . entries) entries)))))))
1194 (define (file-type+size file)
1195 (match (lookup file)
1196 ((_ (and type (or 'directory 'symlink)) . _)
1198 ((_ type ('file file))
1199 (values type (stat:size (stat file))))
1200 ((_ type ('data (? string? data)))
1201 (values type (string-length data)))
1202 ((_ type ('data (? bytevector? data)))
1203 (values type (bytevector-length data)))))
1205 (define (file-port file)
1206 (match (lookup file)
1207 ((_ (or 'regular 'executable) content)
1209 (('file (? string? file))
1210 (open-file file "r0b"))
1211 (('data (? string? str))
1212 (open-input-string str))
1213 (('data (? bytevector? bv))
1214 (open-bytevector-input-port bv))))))
1216 (define (symlink-target file)
1217 (match (lookup file)
1218 ((_ 'symlink target) target)))
1220 (define (directory-entries directory)
1221 (match (lookup directory)
1222 ((_ 'directory (names . _) ...) names)))
1225 (store-connection-add-to-store-cache server))
1227 (or (hash-ref cache tree)
1229 ;; We don't use the 'operation' macro so we can use 'write-file-tree'
1230 ;; instead of 'write-file'.
1231 (record-operation 'add-to-store/tree)
1232 (let ((port (store-connection-socket server))
1233 (buffered (store-connection-output-port server)))
1234 (write-int (operation-id add-to-store) buffered)
1235 (write-string basename buffered)
1236 (write-int 1 buffered) ;obsolete, must be #t
1237 (write-int (if recursive? 1 0) buffered)
1238 (write-string hash-algo buffered)
1239 (write-file-tree basename buffered
1240 #:file-type+size file-type+size
1241 #:file-port file-port
1242 #:symlink-target symlink-target
1243 #:directory-entries directory-entries)
1244 (write-buffered-output server)
1245 (let loop ((done? (process-stderr server)))
1246 (or done? (loop (process-stderr server))))
1247 (let ((result (read-store-path port)))
1248 (hash-set! cache tree result)
1251 (define (file-mapping->tree mapping)
1252 "Convert MAPPING, an alist like:
1254 ((\"guix/build/utils.scm\" . \"…/utils.scm\"))
1256 to a tree suitable for 'add-file-tree-to-store' and 'interned-file-tree'."
1257 (let ((mapping (map (match-lambda
1258 ((destination . source)
1259 (cons (string-tokenize destination %not-slash)
1262 (fold (lambda (pair result)
1264 ((destination . source)
1265 (let loop ((destination destination)
1269 (let* ((mode (stat:mode (stat source)))
1270 (type (if (zero? (logand mode #o100))
1274 `(,type (file ,source))
1277 (let ((directory (assoc-ref result file)))
1282 (('directory . entries) entries)
1285 (alist-delete file result)
1290 (define current-build-prompt
1291 ;; When true, this is the prompt to abort to when 'build-things' is called.
1292 (make-parameter #f))
1294 (define (call-with-build-handler handler thunk)
1295 "Register HANDLER as a \"build handler\" and invoke THUNK."
1297 (make-prompt-tag "build handler"))
1299 (parameterize ((current-build-prompt tag))
1300 (call-with-prompt tag
1303 ;; Since HANDLER may call K, which in turn may call 'build-things'
1304 ;; again, reinstate a prompt (thus, it's not a tail call.)
1305 (call-with-build-handler handler
1307 (apply handler k args)))))))
1309 (define (invoke-build-handler store things mode)
1310 "Abort to 'current-build-prompt' if it is set."
1311 (or (not (current-build-prompt))
1312 (abort-to-prompt (current-build-prompt) store things mode)))
1314 (define-syntax-rule (with-build-handler handler exp ...)
1315 "Register HANDLER as a \"build handler\" and invoke THUNK. When
1316 'build-things' is called within the dynamic extent of the call to THUNK,
1317 HANDLER is invoked like so:
1319 (HANDLER CONTINUE STORE THINGS MODE)
1321 where CONTINUE is the continuation, and the remaining arguments are those that
1322 were passed to 'build-things'.
1324 Build handlers are useful to announce a build plan with 'show-what-to-build'
1325 and to implement dry runs (by not invoking CONTINUE) in a way that gracefully
1326 deals with \"dynamic dependencies\" such as grafts---derivations that depend
1327 on the build output of a previous derivation."
1328 (call-with-build-handler handler (lambda () exp ...)))
1330 ;; Unresolved dynamic dependency.
1331 (define-record-type <unresolved>
1332 (unresolved things continuation)
1334 (things unresolved-things)
1335 (continuation unresolved-continuation))
1337 (define (build-accumulator continue store things mode)
1338 "This build handler accumulates THINGS and returns an <unresolved> object."
1339 (if (= mode (build-mode normal))
1340 (unresolved things continue)
1343 (define (map/accumulate-builds store proc lst)
1344 "Apply PROC over each element of LST, accumulating 'build-things' calls and
1345 coalescing them into a single call."
1348 (with-build-handler build-accumulator
1352 (match (append-map (lambda (obj)
1353 (if (unresolved? obj)
1354 (unresolved-things obj)
1360 ;; We've accumulated things TO-BUILD. Actually build them and resume the
1361 ;; corresponding continuations.
1362 (build-things store (delete-duplicates to-build))
1363 (map/accumulate-builds store
1365 (if (unresolved? obj)
1366 ;; Pass #f because 'build-things' is now
1368 ((unresolved-continuation obj) #f)
1372 (define build-things
1373 (let ((build (operation (build-things (string-list things)
1377 (build/old (operation (build-things (string-list things))
1380 (lambda* (store things #:optional (mode (build-mode normal)))
1381 "Build THINGS, a list of store items which may be either '.drv' files or
1382 outputs, and return when the worker is done building them. Elements of THINGS
1383 that are not derivations can only be substituted and not built locally.
1384 Alternately, an element of THING can be a derivation/output name pair, in
1385 which case the daemon will attempt to substitute just the requested output of
1386 the derivation. Return #t on success.
1388 When a handler is installed with 'with-build-handler', it is called any time
1389 'build-things' is called."
1390 (or (not (invoke-build-handler store things mode))
1391 (let ((things (map (match-lambda
1392 ((drv . output) (string-append drv "!" output))
1395 (parameterize ((current-store-protocol-version
1396 (store-connection-version store)))
1397 (if (>= (store-connection-minor-version store) 15)
1398 (build store things mode)
1399 (if (= mode (build-mode normal))
1400 (build/old store things)
1401 (raise (condition (&store-protocol-error
1402 (message "unsupported build mode")
1403 (status 1))))))))))))
1405 (define-operation (ensure-path (store-path path))
1406 "Ensure that a path is valid. If it is not valid, it may be made valid by
1407 running a substitute. As a GC root is not created by the daemon, you may want
1408 to call ADD-TEMP-ROOT on that store path."
1411 (define-operation (find-roots)
1412 "Return a list of root/target pairs: for each pair, the first element is the
1413 GC root file name and the second element is its target in the store.
1415 When talking to a local daemon, this operation is equivalent to the 'gc-roots'
1416 procedure in (guix store roots), except that the 'find-roots' excludes
1417 potential roots that do not point to store items."
1420 (define-operation (add-temp-root (store-path path))
1421 "Make PATH a temporary root for the duration of the current session.
1425 (define-operation (add-indirect-root (string file-name))
1426 "Make the symlink FILE-NAME an indirect root for the garbage collector:
1427 whatever store item FILE-NAME points to will not be collected. Return #t on
1430 FILE-NAME can be anywhere on the file system, but it must be an absolute file
1431 name--it is the caller's responsibility to ensure that it is an absolute file
1435 (define %gc-roots-directory
1436 ;; The place where garbage collector roots (symlinks) are kept.
1437 (string-append %state-directory "/gcroots"))
1439 (define (add-permanent-root target)
1440 "Add a garbage collector root pointing to TARGET, an element of the store,
1441 preventing TARGET from even being collected. This can also be used if TARGET
1444 Raise an error if the caller does not have write access to the GC root
1446 (let* ((root (string-append %gc-roots-directory "/" (basename target))))
1447 (catch 'system-error
1449 (symlink target root))
1451 ;; If ROOT already exists, this is fine; otherwise, re-throw.
1452 (unless (= EEXIST (system-error-errno args))
1453 (apply throw args))))))
1455 (define (remove-permanent-root target)
1456 "Remove the permanent garbage collector root pointing to TARGET. Raise an
1457 error if there is no such root."
1458 (delete-file (string-append %gc-roots-directory "/" (basename target))))
1461 (operation (query-references (store-path path))
1462 "Return the list of references of PATH."
1465 (define %reference-cache
1466 ;; Brute-force cache mapping store items to their list of references.
1467 ;; Caching matters because when building a profile in the presence of
1468 ;; grafts, we keep calling 'graft-derivation', which in turn calls
1469 ;; 'references/substitutes' many times with the same arguments. Ideally we
1470 ;; would use a cache associated with the daemon connection instead (XXX).
1471 (make-hash-table 100))
1473 (define (references/cached store item)
1474 "Like 'references', but cache results."
1475 (or (hash-ref %reference-cache item)
1476 (let ((references (references store item)))
1477 (hash-set! %reference-cache item references)
1480 (define (references/substitutes store items)
1481 "Return the list of list of references of ITEMS; the result has the same
1482 length as ITEMS. Query substitute information for any item missing from the
1483 store at once. Raise a '&store-protocol-error' exception if reference
1484 information for one of ITEMS is missing."
1485 (let* ((requested items)
1486 (local-refs (map (lambda (item)
1487 (or (hash-ref %reference-cache item)
1488 (guard (c ((store-protocol-error? c) #f))
1489 (references store item))))
1491 (missing (fold-right (lambda (item local-ref result)
1494 (cons item result)))
1498 ;; Query all the substitutes at once to minimize the cost of
1499 ;; launching 'guix substitute' and making HTTP requests.
1500 (substs (if (null? missing)
1502 (substitutable-path-info store missing))))
1503 (when (< (length substs) (length missing))
1504 (raise (condition (&store-protocol-error
1505 (message "cannot determine \
1506 the list of references")
1509 ;; Intersperse SUBSTS and LOCAL-REFS.
1510 (let loop ((items items)
1511 (local-refs local-refs)
1515 (let ((result (reverse result)))
1516 (for-each (cut hash-set! %reference-cache <> <>)
1523 (cons (any (lambda (subst)
1524 (and (string=? (substitutable-path subst) item)
1525 (substitutable-references subst)))
1530 (cons head result)))))))))
1532 (define* (fold-path store proc seed paths
1533 #:optional (relatives (cut references store <>)))
1534 "Call PROC for each of the RELATIVES of PATHS, exactly once, and return the
1535 result formed from the successive calls to PROC, the first of which is passed
1537 (let loop ((paths paths)
1542 (if (vhash-assoc path seen)
1543 (loop rest result seen)
1544 (let ((seen (vhash-cons path #t seen))
1545 (rest (append rest (relatives path)))
1546 (result (proc path result)))
1547 (loop rest result seen))))
1551 (define (requisites store paths)
1552 "Return the requisites of PATHS, including PATHS---i.e., their closures (all
1553 its references, recursively)."
1554 (fold-path store cons '() paths))
1556 (define (topologically-sorted store paths)
1557 "Return a list containing PATHS and all their references sorted in
1560 ;; Do a simple depth-first traversal of all of PATHS.
1561 (let loop ((paths paths)
1562 (visited vlist-null)
1565 (vhash-cons n #t visited))
1567 (define (visited? n)
1568 (vhash-assoc n visited))
1573 (loop tail visited result)
1576 (loop (references store head)
1579 (lambda (visited result)
1582 (cons head result))))))
1584 (values visited result)))))
1586 (call-with-values traverse
1591 (operation (query-referrers (store-path path))
1592 "Return the list of path that refer to PATH."
1595 (define valid-derivers
1596 (operation (query-valid-derivers (store-path path))
1597 "Return the list of valid \"derivers\" of PATH---i.e., all the
1598 .drv present in the store that have PATH among their outputs."
1601 (define query-derivation-outputs ; avoid name clash with `derivation-outputs'
1602 (operation (query-derivation-outputs (store-path path))
1603 "Return the list of outputs of PATH, a .drv file."
1606 (define-operation (has-substitutes? (store-path path))
1607 "Return #t if binary substitutes are available for PATH, and #f otherwise."
1610 (define substitutable-paths
1611 (operation (query-substitutable-paths (store-path-list paths))
1612 "Return the subset of PATHS that is substitutable."
1615 (define substitutable-path-info
1616 (operation (query-substitutable-path-infos (store-path-list paths))
1617 "Return information about the subset of PATHS that is
1618 substitutable. For each substitutable path, a `substitutable?' object is
1619 returned; thus, the resulting list can be shorter than PATHS. Furthermore,
1620 that there is no guarantee that the order of the resulting list matches the
1622 substitutable-path-list))
1624 (define %built-in-builders
1625 (let ((builders (operation (built-in-builders)
1626 "Return the built-in builders."
1629 "Return the names of the supported built-in derivation builders
1630 supported by STORE. The result is memoized for STORE."
1631 ;; Check whether STORE's version supports this RPC and built-in
1632 ;; derivation builders in general, which appeared in Guix > 0.11.0.
1633 ;; Return the empty list if it doesn't. Note that this RPC does not
1634 ;; exist in 'nix-daemon'.
1635 (if (or (> (store-connection-major-version store) #x100)
1636 (and (= (store-connection-major-version store) #x100)
1637 (>= (store-connection-minor-version store) #x60)))
1641 (define (built-in-builders store)
1642 "Return the names of the supported built-in derivation builders
1643 supported by STORE."
1644 (force (store-connection-built-in-builders store)))
1646 (define-operation (optimize-store)
1647 "Optimize the store by hard-linking identical files (\"deduplication\".)
1648 Return #t on success."
1649 ;; Note: the daemon in Guix <= 0.8.2 does not implement this RPC.
1652 (define verify-store
1653 (let ((verify (operation (verify-store (boolean check-contents?)
1657 (lambda* (store #:key check-contents? repair?)
1658 "Verify the integrity of the store and return false if errors remain,
1659 and true otherwise. When REPAIR? is true, repair any missing or altered store
1660 items by substituting them (this typically requires root privileges because it
1661 is not an atomic operation.) When CHECK-CONTENTS? is true, check the contents
1662 of store items; this can take a lot of time."
1663 (not (verify store check-contents? repair?)))))
1665 (define (run-gc server action to-delete min-freed)
1666 "Perform the garbage-collector operation ACTION, one of the
1667 `gc-action' values. When ACTION is `delete-specific', the TO-DELETE is
1668 the list of store paths to delete. IGNORE-LIVENESS? should always be
1669 #f. MIN-FREED is the minimum amount of disk space to be freed, in
1670 bytes, before the GC can stop. Return the list of store paths delete,
1671 and the number of bytes freed."
1672 (let ((s (store-connection-socket server))
1673 (buffered (store-connection-output-port server)))
1674 (write-int (operation-id collect-garbage) buffered)
1675 (write-int action buffered)
1676 (write-store-path-list to-delete buffered)
1677 (write-arg boolean #f buffered) ; ignore-liveness?
1678 (write-long-long min-freed buffered)
1679 (write-int 0 buffered) ; obsolete
1680 (when (>= (store-connection-minor-version server) 5)
1681 ;; Obsolete `use-atime' and `max-atime' parameters.
1682 (write-int 0 buffered)
1683 (write-int 0 buffered))
1684 (write-buffered-output server)
1686 ;; Loop until the server is done sending error output.
1687 (let loop ((done? (process-stderr server)))
1688 (or done? (loop (process-stderr server))))
1690 (let ((paths (read-store-path-list s))
1691 (freed (read-long-long s))
1692 (obsolete (read-long-long s)))
1693 (unless (null? paths)
1694 ;; To be on the safe side, completely invalidate both caches.
1695 ;; Otherwise we could end up returning store paths that are no longer
1697 (hash-clear! (store-connection-add-to-store-cache server))
1698 (hash-clear! (store-connection-add-text-to-store-cache server)))
1700 (values paths freed))))
1702 (define-syntax-rule (%long-long-max)
1703 ;; Maximum unsigned 64-bit integer.
1706 (define (live-paths server)
1707 "Return the list of live store paths---i.e., store paths still
1708 referenced, and thus not subject to being garbage-collected."
1709 (run-gc server (gc-action return-live) '() (%long-long-max)))
1711 (define (dead-paths server)
1712 "Return the list of dead store paths---i.e., store paths no longer
1713 referenced, and thus subject to being garbage-collected."
1714 (run-gc server (gc-action return-dead) '() (%long-long-max)))
1716 (define* (collect-garbage server #:optional (min-freed (%long-long-max)))
1717 "Collect garbage from the store at SERVER. If MIN-FREED is non-zero,
1718 then collect at least MIN-FREED bytes. Return the paths that were
1719 collected, and the number of bytes freed."
1720 (run-gc server (gc-action delete-dead) '() min-freed))
1722 (define* (delete-paths server paths #:optional (min-freed (%long-long-max)))
1723 "Delete PATHS from the store at SERVER, if they are no longer
1724 referenced. If MIN-FREED is non-zero, then stop after at least
1725 MIN-FREED bytes have been collected. Return the paths that were
1726 collected, and the number of bytes freed."
1727 (run-gc server (gc-action delete-specific) paths min-freed))
1729 (define (import-paths server port)
1730 "Import the set of store paths read from PORT into SERVER's store. An error
1731 is raised if the set of paths read from PORT is not signed (as per
1732 'export-path #:sign? #t'.) Return the list of store paths imported."
1733 (let ((s (store-connection-socket server)))
1734 (write-int (operation-id import-paths) s)
1735 (let loop ((done? (process-stderr server port)))
1736 (or done? (loop (process-stderr server port))))
1737 (read-store-path-list s)))
1739 (define* (export-path server path port #:key (sign? #t))
1740 "Export PATH to PORT. When SIGN? is true, sign it."
1741 (let ((s (store-connection-socket server))
1742 (buffered (store-connection-output-port server)))
1743 (write-int (operation-id export-path) buffered)
1744 (write-store-path path buffered)
1745 (write-arg boolean sign? buffered)
1746 (write-buffered-output server)
1747 (let loop ((done? (process-stderr server port)))
1748 (or done? (loop (process-stderr server port))))
1749 (= 1 (read-int s))))
1751 (define* (export-paths server paths port #:key (sign? #t) recursive?
1753 (progress (const #f))
1754 (finish (const #f)))
1755 "Export the store paths listed in PATHS to PORT, in topological order,
1756 signing them if SIGN? is true. When RECURSIVE? is true, export the closure of
1757 PATHS---i.e., PATHS and all their dependencies.
1759 START, PROGRESS, and FINISH are used to track progress of the data transfer.
1760 START is a one-argument that is passed the list of store items that will be
1761 transferred; it returns values that are then used as the initial state
1762 threaded through PROGRESS calls. PROGRESS is passed the store item about to
1763 be sent, along with the values previously return by START or by PROGRESS
1764 itself. FINISH is called when the last store item has been called."
1766 (let ((sorted (topologically-sorted server paths)))
1767 ;; When RECURSIVE? is #f, filter out the references of PATHS.
1770 (filter (cut member <> paths) sorted))))
1772 (let loop ((paths ordered)
1773 (state (call-with-values (lambda () (start ordered))
1777 (apply finish state)
1781 (and (export-path server head port #:sign? sign?)
1784 (lambda () (apply progress head state))
1787 (define-operation (query-failed-paths)
1788 "Return the list of store items for which a build failure is cached.
1790 The result is always the empty list unless the daemon was started with
1791 '--cache-failures'."
1794 (define-operation (clear-failed-paths (store-path-list items))
1795 "Remove ITEMS from the list of cached build failures.
1797 This makes sense only when the daemon was started with '--cache-failures'."
1805 (define-syntax-rule (define-alias new old)
1806 (define-syntax new (identifier-syntax old)))
1808 ;; The store monad allows us to (1) build sequences of operations in the
1809 ;; store, and (2) make the store an implicit part of the execution context,
1810 ;; rather than a parameter of every single function.
1811 (define-alias %store-monad %state-monad)
1812 (define-alias store-return state-return)
1813 (define-alias store-bind state-bind)
1815 ;; Instantiate templates for %STORE-MONAD since it's syntactically different
1816 ;; from %STATE-MONAD.
1817 (template-directory instantiations %store-monad)
1819 (define* (cache-object-mapping object keys result
1820 #:key (vhash-cons vhash-consq))
1821 "Augment the store's object cache with a mapping from OBJECT/KEYS to RESULT.
1822 KEYS is a list of additional keys to match against, for instance a (SYSTEM
1823 TARGET) tuple. Use VHASH-CONS to insert OBJECT into the cache.
1825 OBJECT is typically a high-level object such as a <package> or an <origin>,
1826 and RESULT is typically its derivation."
1831 (object-cache (vhash-cons object (cons result keys)
1832 (store-connection-object-cache store)))))))
1834 (define record-cache-lookup!
1835 (if (profiled? "object-cache")
1840 (register-profiling-hook!
1843 (format (current-error-port) "Store object cache:
1847 cache size: ~5@a entries~%"
1851 (* 100. (/ hits lookups)))
1854 (lambda (hit? cache)
1856 (if (eq? cache vlist-null)
1859 (set! lookups (+ 1 lookups))
1860 (set! hits (if hit? (+ hits 1) hits))
1861 (set! size (+ (if hit? 0 1)
1862 (vlist-length cache)))))
1866 (define-inlinable (lookup-cached-object object keys vhash-fold*)
1867 "Return the cached object in the store connection corresponding to OBJECT
1868 and KEYS; use VHASH-FOLD* to look for OBJECT in the cache. KEYS is a list of
1869 additional keys to match against, and which are compared with 'equal?'.
1870 Return #f on failure and the cached result otherwise."
1872 (let* ((cache (store-connection-object-cache store))
1874 ;; Escape as soon as we find the result. This avoids traversing
1875 ;; the whole vlist chain and significantly reduces the number of
1877 (value (let/ec return
1878 (vhash-fold* (lambda (item result)
1881 (if (equal? keys keys*)
1886 (record-cache-lookup! value cache)
1887 (values value store))))
1889 (define* (%mcached mthunk object #:optional (keys '())
1891 (vhash-cons vhash-consq)
1892 (vhash-fold* vhash-foldq*))
1893 "Bind the monadic value returned by MTHUNK, which supposedly corresponds to
1894 OBJECT/KEYS, or return its cached value. Use VHASH-CONS to insert OBJECT into
1895 the cache, and VHASH-FOLD* to look it up."
1896 (mlet %store-monad ((cached (lookup-cached-object object keys
1902 (cache-object-mapping object keys result
1903 #:vhash-cons vhash-cons))))))
1905 (define-syntax mcached
1906 (syntax-rules (eq? equal?)
1907 "Run MVALUE, which corresponds to OBJECT/KEYS, and cache it; or return the
1908 value associated with OBJECT/KEYS in the store's object cache if there is
1910 ((_ eq? mvalue object keys ...)
1911 (%mcached (lambda () mvalue)
1912 object (list keys ...)
1913 #:vhash-cons vhash-consq
1914 #:vhash-fold* vhash-foldq*))
1915 ((_ equal? mvalue object keys ...)
1916 (%mcached (lambda () mvalue)
1917 object (list keys ...)
1918 #:vhash-cons vhash-cons
1919 #:vhash-fold* vhash-fold*))
1920 ((_ mvalue object keys ...)
1921 (mcached eq? mvalue object keys ...))))
1923 (define (preserve-documentation original proc)
1924 "Return PROC with documentation taken from ORIGINAL."
1925 (set-object-property! proc 'documentation
1926 (procedure-property original 'documentation))
1929 (define (store-lift proc)
1930 "Lift PROC, a procedure whose first argument is a connection to the store,
1931 in the store monad."
1932 (preserve-documentation proc
1935 (values (apply proc store args) store)))))
1937 (define (store-lower proc)
1938 "Lower PROC, a monadic procedure in %STORE-MONAD, to a \"normal\" procedure
1939 taking the store as its first argument."
1940 (preserve-documentation proc
1941 (lambda (store . args)
1942 (run-with-store store (apply proc args)))))
1944 (define (mapm/accumulate-builds mproc lst)
1945 "Like 'mapm' in %STORE-MONAD, but accumulate 'build-things' calls and
1946 coalesce them into a single call."
1948 (values (map/accumulate-builds store
1950 (run-with-store store
1952 #:system (%current-system)
1953 #:target (%current-target-system)))
1959 ;; Store monad operators.
1962 (define* (binary-file name
1964 #:optional (references '()))
1965 "Return as a monadic value the absolute file name in the store of the file
1966 containing DATA, a bytevector. REFERENCES is a list of store items that the
1967 resulting text file refers to; it defaults to the empty list."
1969 (values (add-data-to-store store name data references)
1972 (define* (text-file name
1974 #:optional (references '()))
1975 "Return as a monadic value the absolute file name in the store of the file
1976 containing TEXT, a string. REFERENCES is a list of store items that the
1977 resulting text file refers to; it defaults to the empty list."
1979 (values (add-text-to-store store name text references)
1982 (define* (interned-file file #:optional name
1983 #:key (recursive? #t) (select? true))
1984 "Return the name of FILE once interned in the store. Use NAME as its store
1985 name, or the basename of FILE if NAME is omitted.
1987 When RECURSIVE? is true, the contents of FILE are added recursively; if FILE
1988 designates a flat file and RECURSIVE? is true, its contents are added, and its
1989 permission bits are kept.
1991 When RECURSIVE? is true, call (SELECT? FILE STAT) for each directory entry,
1992 where FILE is the entry's absolute file name and STAT is the result of
1993 'lstat'; exclude entries for which SELECT? does not return true."
1995 (values (add-to-store store (or name (basename file))
1996 recursive? "sha256" file
2000 (define interned-file-tree
2001 (store-lift add-file-tree-to-store))
2004 ;; Monadic variant of 'build-things'.
2005 (store-lift build-things))
2007 (define set-build-options*
2008 (store-lift set-build-options))
2011 (store-lift references))
2013 (define (query-path-info* item)
2014 "Monadic version of 'query-path-info' that returns #f when ITEM is not in
2017 (guard (c ((store-protocol-error? c)
2018 ;; ITEM is not in the store; return #f.
2020 (values (query-path-info store item) store))))
2022 (define-inlinable (current-system)
2023 ;; Consult the %CURRENT-SYSTEM fluid at bind time. This is equivalent to
2024 ;; (lift0 %current-system %store-monad), but inlinable, thus avoiding
2025 ;; closure allocation in some cases.
2027 (values (%current-system) state)))
2029 (define-inlinable (set-current-system system)
2030 ;; Set the %CURRENT-SYSTEM fluid at bind time.
2032 (values (%current-system system) state)))
2034 (define-inlinable (current-target-system)
2035 ;; Consult the %CURRENT-TARGET-SYSTEM fluid at bind time.
2037 (values (%current-target-system) state)))
2039 (define-inlinable (set-current-target target)
2040 ;; Set the %CURRENT-TARGET-SYSTEM fluid at bind time.
2042 (values (%current-target-system target) state)))
2044 (define %guile-for-build
2045 ;; The derivation of the Guile to be used within the build environment,
2046 ;; when using 'gexp->derivation' and co.
2047 (make-parameter #f))
2049 (define set-store-connection-object-cache!
2050 (record-modifier <store-connection> 'object-cache))
2052 (define* (run-with-store store mval
2054 (guile-for-build (%guile-for-build))
2055 (system (%current-system))
2057 "Run MVAL, a monadic value in the store monad, in STORE, an open store
2058 connection, and return the result."
2059 ;; Initialize the dynamic bindings here to avoid bad surprises. The
2060 ;; difficulty lies in the fact that dynamic bindings are resolved at
2061 ;; bind-time and not at call time, which can be disconcerting.
2062 (parameterize ((%guile-for-build guile-for-build)
2063 (%current-system system)
2064 (%current-target-system target))
2065 (call-with-values (lambda ()
2066 (run-with-state mval store))
2067 (lambda (result new-store)
2068 (when (and store new-store)
2069 ;; Copy the object cache from NEW-STORE so we don't fully discard
2071 (let ((cache (store-connection-object-cache new-store)))
2072 (set-store-connection-object-cache! store cache)))
2080 (define %store-prefix
2081 ;; Absolute path to the Nix store.
2082 (make-parameter %store-directory))
2084 (define (compressed-hash bv size) ; `compressHash'
2085 "Given the hash stored in BV, return a compressed version thereof that fits
2087 (define new (make-bytevector size 0))
2088 (define old-size (bytevector-length bv))
2092 (let* ((j (modulo i size))
2093 (o (bytevector-u8-ref new j)))
2094 (bytevector-u8-set! new j
2095 (logxor o (bytevector-u8-ref bv i)))
2098 (define (store-path type hash name) ; makeStorePath
2099 "Return the store path for NAME/HASH/TYPE."
2100 (let* ((s (string-append type ":sha256:"
2101 (bytevector->base16-string hash) ":"
2102 (%store-prefix) ":" name))
2103 (h (sha256 (string->utf8 s)))
2104 (c (compressed-hash h 20)))
2105 (string-append (%store-prefix) "/"
2106 (bytevector->nix-base32-string c) "-"
2109 (define (output-path output hash name) ; makeOutputPath
2110 "Return an output path for OUTPUT (the name of the output as a string) of
2111 the derivation called NAME with hash HASH."
2112 (store-path (string-append "output:" output) hash
2113 (if (string=? output "out")
2115 (string-append name "-" output))))
2117 (define* (fixed-output-path name hash
2122 "Return an output path for the fixed output OUTPUT defined by HASH of type
2123 HASH-ALGO, of the derivation NAME. RECURSIVE? has the same meaning as for
2125 (if (and recursive? (eq? hash-algo 'sha256))
2126 (store-path "source" hash name)
2127 (let ((tag (string-append "fixed:" output ":"
2128 (if recursive? "r:" "")
2129 (symbol->string hash-algo) ":"
2130 (bytevector->base16-string hash) ":")))
2131 (store-path (string-append "output:" output)
2132 (sha256 (string->utf8 tag))
2135 (define (store-path? path)
2136 "Return #t if PATH is a store path."
2137 ;; This is a lightweight check, compared to using a regexp, but this has to
2138 ;; be fast as it's called often in `derivation', for instance.
2139 ;; `isStorePath' in Nix does something similar.
2140 (string-prefix? (%store-prefix) path))
2142 (define (direct-store-path? path)
2143 "Return #t if PATH is a store path, and not a sub-directory of a store path.
2144 This predicate is sometimes needed because files *under* a store path are not
2146 (and (store-path? path)
2147 (not (string=? path (%store-prefix)))
2148 (let ((len (+ 1 (string-length (%store-prefix)))))
2149 (not (string-index (substring path len) #\/)))))
2151 (define (direct-store-path path)
2152 "Return the direct store path part of PATH, stripping components after
2153 '/gnu/store/xxxx-foo'."
2154 (let ((prefix-length (+ (string-length (%store-prefix)) 35)))
2155 (if (> (string-length path) prefix-length)
2156 (let ((slash (string-index path #\/ prefix-length)))
2157 (if slash (string-take path slash) path))
2160 (define (derivation-path? path)
2161 "Return #t if PATH is a derivation path."
2162 (and (store-path? path) (string-suffix? ".drv" path)))
2164 (define (store-path-base path)
2165 "Return the base path of a path in the store."
2166 (and (string-prefix? (%store-prefix) path)
2167 (let ((base (string-drop path (+ 1 (string-length (%store-prefix))))))
2168 (and (> (string-length base) 33)
2169 (not (string-index base #\/))
2172 (define (store-path-package-name path)
2173 "Return the package name part of PATH, a file name in the store."
2174 (let ((base (store-path-base path)))
2175 (string-drop base (+ 32 1)))) ;32 hash part + 1 hyphen
2177 (define (store-path-hash-part path)
2178 "Return the hash part of PATH as a base32 string, or #f if PATH is not a
2179 syntactically valid store path."
2180 (match (store-path-base path)
2183 (let ((hash (string-take base 32)))
2184 (and (string-every %nix-base32-charset hash)
2187 (define (derivation-log-file drv)
2188 "Return the build log file for DRV, a derivation file name, or #f if it
2189 could not be found."
2190 (let* ((base (basename drv))
2191 (log (string-append (or (getenv "GUIX_LOG_DIRECTORY")
2192 (string-append %localstatedir "/log/guix"))
2194 (string-take base 2) "/"
2195 (string-drop base 2)))
2196 (log.gz (string-append log ".gz"))
2197 (log.bz2 (string-append log ".bz2")))
2198 (cond ((file-exists? log.gz) log.gz)
2199 ((file-exists? log.bz2) log.bz2)
2200 ((file-exists? log) log)
2203 (define (log-file store file)
2204 "Return the build log file for FILE, or #f if none could be found. FILE
2205 must be an absolute store file name, or a derivation file name."
2206 (cond ((derivation-path? file)
2207 (derivation-log-file file))
2209 (match (valid-derivers store file)
2211 ;; Return the first that works.
2212 (any (cut log-file store <>) derivers))
2215 ;;; Local Variables:
2216 ;;; eval: (put 'system-error-to-connection-error 'scheme-indent-function 1)