1 ;;; GNU Guix --- Functional package management for GNU
2 ;;; Copyright © 2012, 2013, 2014, 2015, 2016, 2017, 2018, 2019 Ludovic Courtès <ludo@gnu.org>
3 ;;; Copyright © 2018 Jan Nieuwenhuizen <janneke@gnu.org>
5 ;;; This file is part of GNU Guix.
7 ;;; GNU Guix is free software; you can redistribute it and/or modify it
8 ;;; under the terms of the GNU General Public License as published by
9 ;;; the Free Software Foundation; either version 3 of the License, or (at
10 ;;; your option) any later version.
12 ;;; GNU Guix is distributed in the hope that it will be useful, but
13 ;;; WITHOUT ANY WARRANTY; without even the implied warranty of
14 ;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
15 ;;; GNU General Public License for more details.
17 ;;; You should have received a copy of the GNU General Public License
18 ;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
20 (define-module (guix store)
21 #:use-module (guix utils)
22 #:use-module (guix config)
23 #:use-module (guix deprecation)
24 #:use-module (guix memoization)
25 #:use-module (guix serialization)
26 #:use-module (guix monads)
27 #:use-module (guix records)
28 #:use-module (guix base16)
29 #:use-module (guix base32)
30 #:use-module (gcrypt hash)
31 #:use-module (guix profiling)
32 #:autoload (guix build syscalls) (terminal-columns)
33 #:use-module (rnrs bytevectors)
34 #:use-module (ice-9 binary-ports)
35 #:use-module ((ice-9 control) #:select (let/ec))
36 #:use-module (srfi srfi-1)
37 #:use-module (srfi srfi-9)
38 #:use-module (srfi srfi-9 gnu)
39 #:use-module (srfi srfi-11)
40 #:use-module (srfi srfi-26)
41 #:use-module (srfi srfi-34)
42 #:use-module (srfi srfi-35)
43 #:use-module (srfi srfi-39)
44 #:use-module (ice-9 match)
45 #:use-module (ice-9 regex)
46 #:use-module (ice-9 vlist)
47 #:use-module (ice-9 popen)
48 #:use-module (ice-9 threads)
49 #:use-module (ice-9 format)
50 #:use-module (web uri)
51 #:export (%daemon-socket-uri
53 %default-substitute-urls
56 store-connection-version
57 store-connection-major-version
58 store-connection-minor-version
59 store-connection-socket
61 ;; Deprecated forms for 'store-connection'.
64 nix-server-major-version
65 nix-server-minor-version
68 current-store-protocol-version ;for internal use
71 &store-error store-error?
72 &store-connection-error store-connection-error?
73 store-connection-error-file
74 store-connection-error-code
75 &store-protocol-error store-protocol-error?
76 store-protocol-error-message
77 store-protocol-error-status
79 ;; Deprecated forms for '&store-error' et al.
81 &nix-connection-error nix-connection-error?
82 nix-connection-error-file
83 nix-connection-error-code
84 &nix-protocol-error nix-protocol-error?
85 nix-protocol-error-message
86 nix-protocol-error-status
104 add-file-tree-to-store
113 remove-permanent-root
117 substitutable-deriver
118 substitutable-references
119 substitutable-download-size
120 substitutable-nar-size
123 substitutable-path-info
129 path-info-registration-time
134 references/substitutes
143 query-derivation-outputs
151 current-build-output-port
173 store-path-package-name
179 (define %protocol-version #x163)
181 (define %worker-magic-1 #x6e697863) ; "nixc"
182 (define %worker-magic-2 #x6478696f) ; "dxio"
184 (define (protocol-major magic)
185 (logand magic #xff00))
186 (define (protocol-minor magic)
187 (logand magic #x00ff))
188 (define (protocol-version major minor)
189 (logior major minor))
191 (define-syntax define-enumerate-type
193 ((_ name->int (name id) ...)
194 (define-syntax name->int
195 (syntax-rules (name ...)
196 ((_ name) id) ...)))))
198 (define-enumerate-type operation-id
199 ;; operation numbers from worker-protocol.hh
207 (add-text-to-store 8)
211 (add-indirect-root 12)
218 ;;(query-substitutable-path-info 21) ; obsolete as of #x10c
219 (query-derivation-outputs 22)
220 (query-all-valid-paths 23)
221 (query-failed-paths 24)
222 (clear-failed-paths 25)
225 (query-derivation-output-names 28)
226 (query-path-from-hash-part 29)
227 (query-substitutable-path-infos 30)
228 (query-valid-paths 31)
229 (query-substitutable-paths 32)
230 (query-valid-derivers 33)
233 (built-in-builders 80))
235 (define-enumerate-type hash-algo
241 (define-enumerate-type build-mode
247 (define-enumerate-type gc-action
254 (define %default-socket-path
255 (string-append %state-directory "/daemon-socket/socket"))
257 (define %daemon-socket-uri
258 ;; URI or file name of the socket the daemon listens too.
259 (make-parameter (or (getenv "GUIX_DAEMON_SOCKET")
260 %default-socket-path)))
264 ;; Information about a substitutable store path.
265 (define-record-type <substitutable>
266 (substitutable path deriver refs dl-size nar-size)
268 (path substitutable-path)
269 (deriver substitutable-deriver)
270 (refs substitutable-references)
271 (dl-size substitutable-download-size)
272 (nar-size substitutable-nar-size))
274 (define (read-substitutable-path-list p)
275 (let loop ((len (read-int p))
279 (let ((path (read-store-path p))
280 (deriver (read-store-path p))
281 (refs (read-store-path-list p))
282 (dl-size (read-long-long p))
283 (nar-size (read-long-long p)))
285 (cons (substitutable path deriver refs dl-size nar-size)
288 ;; Information about a store path.
289 (define-record-type <path-info>
290 (path-info deriver hash references registration-time nar-size)
292 (deriver path-info-deriver) ;string | #f
293 (hash path-info-hash)
294 (references path-info-references)
295 (registration-time path-info-registration-time)
296 (nar-size path-info-nar-size))
298 (define (read-path-info p)
299 (let ((deriver (match (read-store-path p)
302 (hash (base16-string->bytevector (read-string p)))
303 (refs (read-store-path-list p))
304 (registration-time (read-int p))
305 (nar-size (read-long-long p)))
306 (path-info deriver hash refs registration-time nar-size)))
308 (define-syntax write-arg
309 (syntax-rules (integer boolean bytevector
310 string string-list string-pairs
311 store-path store-path-list base16)
315 (write-int (if arg 1 0) p))
316 ((_ bytevector arg p)
317 (write-bytevector arg p))
319 (write-string arg p))
320 ((_ string-list arg p)
321 (write-string-list arg p))
322 ((_ string-pairs arg p)
323 (write-string-pairs arg p))
324 ((_ store-path arg p)
325 (write-store-path arg p))
326 ((_ store-path-list arg p)
327 (write-store-path-list arg p))
329 (write-string (bytevector->base16-string arg) p))))
331 (define-syntax read-arg
332 (syntax-rules (integer boolean string store-path store-path-list string-list
333 substitutable-path-list path-info base16)
337 (not (zero? (read-int p))))
342 ((_ store-path-list p)
343 (read-store-path-list p))
345 (read-string-list p))
346 ((_ substitutable-path-list p)
347 (read-substitutable-path-list p))
351 (base16-string->bytevector (read-string p)))))
356 (define-record-type* <store-connection> store-connection %make-store-connection
358 (socket store-connection-socket)
359 (major store-connection-major-version)
360 (minor store-connection-minor-version)
362 (buffer store-connection-output-port) ;output port
363 (flush store-connection-flush-output) ;thunk
365 ;; Caches. We keep them per-connection, because store paths build
366 ;; during the session are temporary GC roots kept for the duration of
368 (ats-cache store-connection-add-to-store-cache)
369 (atts-cache store-connection-add-text-to-store-cache)
370 (object-cache store-connection-object-cache
371 (default vlist-null)) ;vhash
372 (built-in-builders store-connection-built-in-builders
373 (default (delay '())))) ;promise
375 (set-record-type-printer! <store-connection>
377 (format port "#<store-connection ~a.~a ~a>"
378 (store-connection-major-version obj)
379 (store-connection-minor-version obj)
380 (number->string (object-address obj)
383 (define-deprecated/alias nix-server? store-connection?)
384 (define-deprecated/alias nix-server-major-version
385 store-connection-major-version)
386 (define-deprecated/alias nix-server-minor-version
387 store-connection-minor-version)
388 (define-deprecated/alias nix-server-socket store-connection-socket)
391 (define-condition-type &store-error &error
394 (define-condition-type &store-connection-error &store-error
395 store-connection-error?
396 (file store-connection-error-file)
397 (errno store-connection-error-code))
399 (define-condition-type &store-protocol-error &store-error
400 store-protocol-error?
401 (message store-protocol-error-message)
402 (status store-protocol-error-status))
404 (define-deprecated/alias &nix-error &store-error)
405 (define-deprecated/alias nix-error? store-error?)
406 (define-deprecated/alias &nix-connection-error &store-connection-error)
407 (define-deprecated/alias nix-connection-error? store-connection-error?)
408 (define-deprecated/alias nix-connection-error-file
409 store-connection-error-file)
410 (define-deprecated/alias nix-connection-error-code
411 store-connection-error-code)
412 (define-deprecated/alias &nix-protocol-error &store-protocol-error)
413 (define-deprecated/alias nix-protocol-error? store-protocol-error?)
414 (define-deprecated/alias nix-protocol-error-message
415 store-protocol-error-message)
416 (define-deprecated/alias nix-protocol-error-status
417 store-protocol-error-status)
420 (define-syntax-rule (system-error-to-connection-error file exp ...)
421 "Catch 'system-error' exceptions and translate them to
422 '&store-connection-error'."
427 (let ((errno (system-error-errno args)))
428 (raise (condition (&store-connection-error
432 (define (open-unix-domain-socket file)
433 "Connect to the Unix-domain socket at FILE and return it. Raise a
434 '&store-connection-error' upon error."
435 (let ((s (with-fluids ((%default-port-encoding #f))
436 ;; This trick allows use of the `scm_c_read' optimization.
437 (socket PF_UNIX SOCK_STREAM 0)))
438 (a (make-socket-address PF_UNIX file)))
440 (system-error-to-connection-error file
444 (define %default-guix-port
445 ;; Default port when connecting to a daemon over TCP/IP.
448 (define (open-inet-socket host port)
449 "Connect to the Unix-domain socket at HOST:PORT and return it. Raise a
450 '&store-connection-error' upon error."
451 (let ((sock (with-fluids ((%default-port-encoding #f))
452 ;; This trick allows use of the `scm_c_read' optimization.
453 (socket PF_UNIX SOCK_STREAM 0))))
456 (if (number? port) (number->string port) port)
458 (logior AI_ADDRCONFIG AI_NUMERICSERV)
460 0 ;any address family
461 SOCK_STREAM)) ;TCP only
463 (let loop ((addresses addresses))
466 (let ((s (socket (addrinfo:fam ai)
468 SOCK_STREAM IPPROTO_IP)))
472 (connect s (addrinfo:addr ai))
474 ;; Setting this option makes a dramatic difference because it
475 ;; avoids the "ACK delay" on our RPC messages.
476 (setsockopt s IPPROTO_TCP TCP_NODELAY 1)
479 ;; Connection failed, so try one of the other addresses.
482 (raise (condition (&store-connection-error
484 (errno (system-error-errno args)))))
487 (define (connect-to-daemon uri)
488 "Connect to the daemon at URI, a string that may be an actual URI or a file
490 (define (not-supported)
491 (raise (condition (&store-connection-error
496 (match (string->uri uri)
497 (#f ;URI is a file name
498 open-unix-domain-socket)
500 (match (uri-scheme uri)
503 (open-unix-domain-socket (uri-path uri))))
506 (open-inet-socket (uri-host uri)
507 (or (uri-port uri) %default-guix-port))))
509 ;; Try to dynamically load a module for SCHEME.
510 ;; XXX: Errors are swallowed.
511 (match (false-if-exception
512 (resolve-interface `(guix store ,scheme)))
514 (match (false-if-exception
515 (module-ref module 'connect-to-daemon))
516 ((? procedure? connect)
519 (x (not-supported))))
520 (#f (not-supported))))
526 (define* (open-connection #:optional (uri (%daemon-socket-uri))
527 #:key port (reserve-space? #t) cpu-affinity)
528 "Connect to the daemon at URI (a string), or, if PORT is not #f, use it as
529 the I/O port over which to communicate to a build daemon.
531 When RESERVE-SPACE? is true, instruct it to reserve a little bit of extra
532 space on the file system so that the garbage collector can still operate,
533 should the disk become full. When CPU-AFFINITY is true, it must be an integer
534 corresponding to an OS-level CPU number to which the daemon's worker process
535 for this connection will be pinned. Return a server object."
536 (guard (c ((nar-error? c)
537 ;; One of the 'write-' or 'read-' calls below failed, but this is
538 ;; really a connection error.
540 (&store-connection-error (file (or port uri))
542 (&message (message "build daemon handshake failed"))))))
543 (let*-values (((port)
544 (or port (connect-to-daemon uri)))
546 (buffering-output-port port
547 (make-bytevector 8192))))
548 (write-int %worker-magic-1 port)
549 (let ((r (read-int port)))
550 (and (eqv? r %worker-magic-2)
551 (let ((v (read-int port)))
552 (and (eqv? (protocol-major %protocol-version)
555 (write-int %protocol-version port)
556 (when (>= (protocol-minor v) 14)
557 (write-int (if cpu-affinity 1 0) port)
559 (write-int cpu-affinity port)))
560 (when (>= (protocol-minor v) 11)
561 (write-int (if reserve-space? 1 0) port))
562 (letrec* ((built-in-builders
563 (delay (%built-in-builders conn)))
565 (%make-store-connection port
569 (make-hash-table 100)
570 (make-hash-table 100)
573 (let loop ((done? (process-stderr conn)))
574 (or done? (process-stderr conn)))
577 (define* (port->connection port
578 #:key (version %protocol-version))
579 "Assimilate PORT, an input/output port, and return a connection to the
580 daemon, assuming the given protocol VERSION.
582 Warning: this procedure assumes that the initial handshake with the daemon has
583 already taken place on PORT and that we're just continuing on this established
584 connection. Use with care."
585 (let-values (((output flush)
586 (buffering-output-port port (make-bytevector 8192))))
588 (%make-store-connection port
589 (protocol-major version)
590 (protocol-minor version)
592 (make-hash-table 100)
593 (make-hash-table 100)
595 (delay (%built-in-builders connection))))
599 (define (store-connection-version store)
600 "Return the protocol version of STORE as an integer."
601 (protocol-version (store-connection-major-version store)
602 (store-connection-minor-version store)))
604 (define-deprecated/alias nix-server-version store-connection-version)
606 (define (write-buffered-output server)
607 "Flush SERVER's output port."
608 (force-output (store-connection-output-port server))
609 ((store-connection-flush-output server)))
611 (define (close-connection server)
612 "Close the connection to SERVER."
613 (close (store-connection-socket server)))
615 (define (call-with-store proc)
616 "Call PROC with an open store connection."
617 (let ((store (open-connection)))
621 (parameterize ((current-store-protocol-version
622 (store-connection-version store)))
625 (false-if-exception (close-connection store))))))
627 (define-syntax-rule (with-store store exp ...)
628 "Bind STORE to an open connection to the store and evaluate EXPs;
629 automatically close the store when the dynamic extent of EXP is left."
630 (call-with-store (lambda (store) exp ...)))
632 (define current-store-protocol-version
633 ;; Protocol version of the store currently used. XXX: This is a hack to
634 ;; communicate the protocol version to the build output port. It's a hack
635 ;; because it could be inaccurrate, for instance if there's code that
636 ;; manipulates several store connections at once; it works well for the
637 ;; purposes of (guix status) though.
640 (define current-build-output-port
641 ;; The port where build output is sent.
642 (make-parameter (current-error-port)))
644 (define* (dump-port in out
646 #:key (buffer-size 16384))
647 "Read LEN bytes from IN (or as much as possible if LEN is #f) and write it
648 to OUT, using chunks of BUFFER-SIZE bytes."
650 (make-bytevector buffer-size))
653 (bytes (get-bytevector-n! in buffer 0
655 (min len buffer-size)
657 (or (eof-object? bytes)
658 (and len (= total len))
659 (let ((total (+ total bytes)))
660 (put-bytevector out buffer 0 bytes)
662 (get-bytevector-n! in buffer 0
664 (min (- len total) buffer-size)
668 ;; Newline characters triggering a flush of 'current-build-output-port'.
669 ;; Unlike Guile's 'line, we flush upon #\return so that progress reports
670 ;; that use that trick are correctly displayed.
671 (char-set #\newline #\return))
673 (define* (process-stderr server #:optional user-port)
674 "Read standard output and standard error from SERVER, writing it to
675 CURRENT-BUILD-OUTPUT-PORT. Return #t when SERVER is done sending data, and
676 #f otherwise; in the latter case, the caller should call `process-stderr'
677 again until #t is returned or an error is raised.
679 Since the build process's output cannot be assumed to be UTF-8, we
680 conservatively consider it to be Latin-1, thereby avoiding possible
681 encoding conversion errors."
683 (store-connection-socket server))
685 ;; magic cookies from worker-protocol.hh
686 (define %stderr-next #x6f6c6d67) ; "olmg", build log
687 (define %stderr-read #x64617461) ; "data", data needed from source
688 (define %stderr-write #x64617416) ; "dat\x16", data for sink
689 (define %stderr-last #x616c7473) ; "alts", we're done
690 (define %stderr-error #x63787470) ; "cxtp", error reporting
692 (let ((k (read-int p)))
693 (cond ((= k %stderr-write)
694 ;; Write a byte stream to USER-PORT.
695 (let* ((len (read-int p))
697 (dump-port p user-port len
698 #:buffer-size (if (<= len 16384) 16384 65536))
700 ;; Consume padding, as for strings.
701 (get-bytevector-n p (- 8 m))))
704 ;; Read a byte stream from USER-PORT.
705 ;; Note: Avoid 'get-bytevector-n' to work around
706 ;; <http://bugs.gnu.org/17591> in Guile up to 2.0.11.
707 (let* ((max-len (read-int p))
708 (data (make-bytevector max-len))
709 (len (get-bytevector-n! user-port data 0 max-len)))
710 (write-bytevector data p len)
713 ;; Log a string. Build logs are usually UTF-8-encoded, but they
714 ;; may also contain arbitrary byte sequences that should not cause
715 ;; this to fail. Thus, use the permissive
716 ;; 'read-maybe-utf8-string'.
717 (let ((s (read-maybe-utf8-string p)))
718 (display s (current-build-output-port))
719 (when (string-any %newlines s)
720 (force-output (current-build-output-port)))
724 (let ((error (read-maybe-utf8-string p))
725 ;; Currently the daemon fails to send a status code for early
726 ;; errors like DB schema version mismatches, so check for EOF.
727 (status (if (and (>= (store-connection-minor-version server) 8)
728 (not (eof-object? (lookahead-u8 p))))
731 (raise (condition (&store-protocol-error
735 ;; The daemon is done (see `stopWork' in `nix-worker.cc'.)
738 (raise (condition (&store-protocol-error
739 (message "invalid error code")
742 (define %default-substitute-urls
743 ;; Default list of substituters. This is *not* the list baked in
744 ;; 'guix-daemon', but it is used by 'guix-service-type' and and a couple of
745 ;; clients ('guix build --log-file' uses it.)
746 (map (if (false-if-exception (resolve-interface '(gnutls)))
747 (cut string-append "https://" <>)
748 (cut string-append "http://" <>))
749 '("ci.guix.gnu.org")))
751 (define* (set-build-options server
752 #:key keep-failed? keep-going? fallback?
754 rounds ;number of build rounds
761 (print-build-trace #t)
763 ;; When true, provide machine-readable "build
764 ;; traces" for use by (guix status). Old clients
765 ;; are unable to make sense, which is why it's
766 ;; disabled by default.
767 print-extended-build-trace?
769 ;; When true, the daemon prefixes builder output
770 ;; with "@ build-log" traces so we can
771 ;; distinguish it from daemon output, and we can
772 ;; distinguish each builder's output
773 ;; (PRINT-BUILD-TRACE must be true as well.) The
774 ;; latter is particularly useful when
775 ;; MAX-BUILD-JOBS > 1.
776 multiplexed-build-output?
779 (use-substitutes? #t)
781 ;; Client-provided substitute URLs. If it is #f,
782 ;; the daemon's settings are used. Otherwise, it
783 ;; overrides the daemons settings; see 'guix
787 ;; Number of columns in the client's terminal.
788 (terminal-columns (terminal-columns))
790 ;; Locale of the client.
791 (locale (false-if-exception (setlocale LC_ALL))))
792 ;; Must be called after `open-connection'.
795 (store-connection-socket server))
797 (let-syntax ((send (syntax-rules ()
798 ((_ (type option) ...)
800 (write-arg type option socket)
802 (write-int (operation-id set-options) socket)
803 (send (boolean keep-failed?) (boolean keep-going?)
804 (boolean fallback?) (integer verbosity))
805 (when (< (store-connection-minor-version server) #x61)
806 (let ((max-build-jobs (or max-build-jobs 1))
807 (max-silent-time (or max-silent-time 3600)))
808 (send (integer max-build-jobs) (integer max-silent-time))))
809 (when (>= (store-connection-minor-version server) 2)
810 (send (boolean use-build-hook?)))
811 (when (>= (store-connection-minor-version server) 4)
812 (send (integer build-verbosity) (integer log-type)
813 (boolean print-build-trace)))
814 (when (and (>= (store-connection-minor-version server) 6)
815 (< (store-connection-minor-version server) #x61))
816 (let ((build-cores (or build-cores (current-processor-count))))
817 (send (integer build-cores))))
818 (when (>= (store-connection-minor-version server) 10)
819 (send (boolean use-substitutes?)))
820 (when (>= (store-connection-minor-version server) 12)
821 (let ((pairs `(;; This option is honored by 'guix substitute' et al.
822 ,@(if print-build-trace
823 `(("print-extended-build-trace"
824 . ,(if print-extended-build-trace? "1" "0")))
826 ,@(if multiplexed-build-output?
827 `(("multiplexed-build-output"
828 . ,(if multiplexed-build-output? "true" "false")))
831 `(("build-timeout" . ,(number->string timeout)))
833 ,@(if max-silent-time
834 `(("build-max-silent-time"
835 . ,(number->string max-silent-time)))
839 . ,(number->string max-build-jobs)))
842 `(("build-cores" . ,(number->string build-cores)))
844 ,@(if substitute-urls
846 . ,(string-join substitute-urls)))
850 . ,(number->string (max 0 (1- rounds)))))
852 ,@(if terminal-columns
853 `(("terminal-columns"
854 . ,(number->string terminal-columns)))
857 `(("locale" . ,locale))
859 (send (string-pairs pairs))))
860 (let loop ((done? (process-stderr server)))
861 (or done? (process-stderr server)))))
863 (define (buffering-output-port port buffer)
864 "Return two value: an output port wrapped around PORT that uses BUFFER (a
865 bytevector) as its internal buffer, and a thunk to flush this output port."
866 ;; Note: In Guile 2.2.2, custom binary output ports already have their own
867 ;; 4K internal buffer.
869 (bytevector-length buffer))
874 (put-bytevector port buffer 0 total)
878 (define (write bv offset count)
879 (if (zero? count) ;end of file
881 (let loop ((offset offset)
884 (cond ((= total size)
886 (loop offset count written))
890 (let ((to-copy (min count (- size total))))
891 (bytevector-copy! bv offset buffer total to-copy)
892 (set! total (+ total to-copy))
893 (loop (+ offset to-copy) (- count to-copy)
894 (+ written to-copy))))))))
896 ;; Note: We need to return FLUSH because the custom binary port has no way
897 ;; to be notified of a 'force-output' call on itself.
898 (values (make-custom-binary-output-port "buffering-output-port"
904 (or (and=> (getenv "GUIX_PROFILING") string-tokenize)
907 "Return true if COMPONENT profiling is active."
908 (member component profiled))))
911 ;; Mapping from RPC names (symbols) to invocation counts.
914 (define* (show-rpc-profile #:optional (port (current-error-port)))
915 "Write to PORT a summary of the RPCs that have been made."
916 (let ((profile (sort (hash-fold alist-cons '() %rpc-calls)
918 (< (cdr rpc1) (cdr rpc2))))))
919 (format port "Remote procedure call summary: ~a RPCs~%"
921 (((names . counts) ...)
922 (reduce + 0 counts))))
923 (for-each (match-lambda
925 (format port " ~30a ... ~5@a~%" rpc count)))
928 (define record-operation
929 ;; Optionally, increment the number of calls of the given RPC.
930 (if (profiled? "rpc")
932 (register-profiling-hook! "rpc" show-rpc-profile)
934 (let ((count (or (hashq-ref %rpc-calls name) 0)))
935 (hashq-set! %rpc-calls name (+ count 1)))))
939 (define-syntax operation
941 "Define a client-side RPC stub for the given operation."
942 ((_ (name (type arg) ...) docstring return ...)
943 (lambda (server arg ...)
945 (let* ((s (store-connection-socket server))
946 (buffered (store-connection-output-port server)))
947 (record-operation 'name)
948 (write-int (operation-id name) buffered)
949 (write-arg type arg buffered)
951 (write-buffered-output server)
953 ;; Loop until the server is done sending error output.
954 (let loop ((done? (process-stderr server)))
955 (or done? (loop (process-stderr server))))
956 (values (read-arg return s) ...))))))
958 (define-syntax-rule (define-operation (name args ...)
959 docstring return ...)
961 (operation (name args ...) docstring return ...)))
963 (define-operation (valid-path? (string path))
964 "Return #t when PATH designates a valid store item and #f otherwise (an
965 invalid item may exist on disk but still be invalid, for instance because it
966 is the result of an aborted or failed build.)
968 A '&store-protocol-error' condition is raised if PATH is not prefixed by the
969 store directory (/gnu/store)."
972 (define-operation (query-path-hash (store-path path))
973 "Return the SHA256 hash of the nar serialization of PATH as a bytevector."
976 (define hash-part->path
977 (let ((query-path-from-hash-part
978 (operation (query-path-from-hash-part (string hash))
981 (lambda (server hash-part)
982 "Return the store path whose hash part is HASH-PART (a nix-base32
983 string). Raise an error if no such path exists."
984 ;; This RPC is primarily used by Hydra to reply to HTTP GETs of
986 (query-path-from-hash-part server hash-part))))
988 (define-operation (query-path-info (store-path path))
989 "Return the info (hash, references, etc.) for PATH."
992 (define add-data-to-store
993 ;; A memoizing version of `add-to-store', to avoid repeated RPCs with
994 ;; the very same arguments during a given session.
995 (let ((add-text-to-store
996 (operation (add-text-to-store (string name) (bytevector text)
997 (string-list references))
1000 (lookup (if (profiled? "add-data-to-store-cache")
1005 (define (show-stats)
1009 (* 100. (/ n lookups))))
1011 (format (current-error-port) "
1012 'add-data-to-store' cache:
1015 .drv files: ~5@a (~,1f%)
1016 Scheme files: ~5@a (~,1f%)~%"
1017 lookups hits (% hits)
1021 (register-profiling-hook! "add-data-to-store-cache"
1023 (lambda (cache args)
1024 (let ((result (hash-ref cache args)))
1025 (set! lookups (+ 1 lookups))
1027 (set! hits (+ 1 hits)))
1030 (cond ((string-suffix? ".drv" name)
1031 (set! drv (+ drv 1)))
1032 ((string-suffix? "-builder" name)
1033 (set! scheme (+ scheme 1)))
1034 ((string-suffix? ".scm" name)
1035 (set! scheme (+ scheme 1))))))
1038 (lambda* (server name bytes #:optional (references '()))
1039 "Add BYTES under file NAME in the store, and return its store path.
1040 REFERENCES is the list of store paths referred to by the resulting store
1042 (let* ((args `(,bytes ,name ,references))
1043 (cache (store-connection-add-text-to-store-cache server)))
1044 (or (lookup cache args)
1045 (let ((path (add-text-to-store server name bytes references)))
1046 (hash-set! cache args path)
1049 (define* (add-text-to-store store name text #:optional (references '()))
1050 "Add TEXT under file NAME in the store, and return its store path.
1051 REFERENCES is the list of store paths referred to by the resulting store
1053 (add-data-to-store store name (string->utf8 text) references))
1056 ;; Define it once and for all since we use it as a default value for
1057 ;; 'add-to-store' and want to make sure two default values are 'eq?' for the
1058 ;; purposes or memoization.
1062 (define add-to-store
1063 ;; A memoizing version of `add-to-store'. This is important because
1064 ;; `add-to-store' leads to huge data transfers to the server, and
1065 ;; because it's often called many times with the very same argument.
1067 (lambda* (server basename recursive? hash-algo file-name
1068 #:key (select? true))
1069 ;; We don't use the 'operation' macro so we can pass SELECT? to
1071 (record-operation 'add-to-store)
1072 (let ((port (store-connection-socket server)))
1073 (write-int (operation-id add-to-store) port)
1074 (write-string basename port)
1075 (write-int 1 port) ;obsolete, must be #t
1076 (write-int (if recursive? 1 0) port)
1077 (write-string hash-algo port)
1078 (write-file file-name port #:select? select?)
1079 (write-buffered-output server)
1080 (let loop ((done? (process-stderr server)))
1081 (or done? (loop (process-stderr server))))
1082 (read-store-path port)))))
1083 (lambda* (server basename recursive? hash-algo file-name
1084 #:key (select? true))
1085 "Add the contents of FILE-NAME under BASENAME to the store. When
1086 RECURSIVE? is false, FILE-NAME must designate a regular file--not a directory
1087 nor a symlink. When RECURSIVE? is true and FILE-NAME designates a directory,
1088 the contents of FILE-NAME are added recursively; if FILE-NAME designates a
1089 flat file and RECURSIVE? is true, its contents are added, and its permission
1090 bits are kept. HASH-ALGO must be a string such as \"sha256\".
1092 When RECURSIVE? is true, call (SELECT? FILE STAT) for each directory entry,
1093 where FILE is the entry's absolute file name and STAT is the result of
1094 'lstat'; exclude entries for which SELECT? does not return true."
1095 ;; Note: We don't stat FILE-NAME at each call, and thus we assume that
1096 ;; the file remains unchanged for the lifetime of SERVER.
1097 (let* ((args `(,file-name ,basename ,recursive? ,hash-algo ,select?))
1098 (cache (store-connection-add-to-store-cache server)))
1099 (or (hash-ref cache args)
1100 (let ((path (add-to-store server basename recursive?
1102 #:select? select?)))
1103 (hash-set! cache args path)
1107 (char-set-complement (char-set #\/)))
1109 (define* (add-file-tree-to-store server tree
1111 (hash-algo "sha256")
1113 "Add the given TREE to the store on SERVER. TREE must be an entry such as:
1115 (\"my-tree\" directory
1116 (\"a\" regular (data \"hello\"))
1117 (\"b\" symlink \"a\")
1119 (\"d\" executable (file \"/bin/sh\"))))
1121 This is a generalized version of 'add-to-store'. It allows you to reproduce
1122 an arbitrary directory layout in the store without creating a derivation."
1124 ;; Note: The format of TREE was chosen to allow trees to be compared with
1125 ;; 'equal?', which in turn allows us to memoize things.
1128 ;; TREE is a single entry.
1135 (define (lookup file)
1136 (let loop ((components (string-tokenize file %not-slash))
1140 (assoc basename tree))
1143 (match (assoc-ref tree head)
1144 (('directory . entries) entries)))))))
1146 (define (file-type+size file)
1147 (match (lookup file)
1148 ((_ (and type (or 'directory 'symlink)) . _)
1150 ((_ type ('file file))
1151 (values type (stat:size (stat file))))
1152 ((_ type ('data (? string? data)))
1153 (values type (string-length data)))
1154 ((_ type ('data (? bytevector? data)))
1155 (values type (bytevector-length data)))))
1157 (define (file-port file)
1158 (match (lookup file)
1159 ((_ (or 'regular 'executable) content)
1161 (('file (? string? file))
1162 (open-file file "r0b"))
1163 (('data (? string? str))
1164 (open-input-string str))
1165 (('data (? bytevector? bv))
1166 (open-bytevector-input-port bv))))))
1168 (define (symlink-target file)
1169 (match (lookup file)
1170 ((_ 'symlink target) target)))
1172 (define (directory-entries directory)
1173 (match (lookup directory)
1174 ((_ 'directory (names . _) ...) names)))
1177 (store-connection-add-to-store-cache server))
1179 (or (hash-ref cache tree)
1181 ;; We don't use the 'operation' macro so we can use 'write-file-tree'
1182 ;; instead of 'write-file'.
1183 (record-operation 'add-to-store/tree)
1184 (let ((port (store-connection-socket server)))
1185 (write-int (operation-id add-to-store) port)
1186 (write-string basename port)
1187 (write-int 1 port) ;obsolete, must be #t
1188 (write-int (if recursive? 1 0) port)
1189 (write-string hash-algo port)
1190 (write-file-tree basename port
1191 #:file-type+size file-type+size
1192 #:file-port file-port
1193 #:symlink-target symlink-target
1194 #:directory-entries directory-entries)
1195 (write-buffered-output server)
1196 (let loop ((done? (process-stderr server)))
1197 (or done? (loop (process-stderr server))))
1198 (let ((result (read-store-path port)))
1199 (hash-set! cache tree result)
1202 (define build-things
1203 (let ((build (operation (build-things (string-list things)
1207 (build/old (operation (build-things (string-list things))
1210 (lambda* (store things #:optional (mode (build-mode normal)))
1211 "Build THINGS, a list of store items which may be either '.drv' files or
1212 outputs, and return when the worker is done building them. Elements of THINGS
1213 that are not derivations can only be substituted and not built locally.
1214 Return #t on success."
1215 (parameterize ((current-store-protocol-version
1216 (store-connection-version store)))
1217 (if (>= (store-connection-minor-version store) 15)
1218 (build store things mode)
1219 (if (= mode (build-mode normal))
1220 (build/old store things)
1221 (raise (condition (&store-protocol-error
1222 (message "unsupported build mode")
1225 (define-operation (add-temp-root (store-path path))
1226 "Make PATH a temporary root for the duration of the current session.
1230 (define-operation (add-indirect-root (string file-name))
1231 "Make the symlink FILE-NAME an indirect root for the garbage collector:
1232 whatever store item FILE-NAME points to will not be collected. Return #t on
1235 FILE-NAME can be anywhere on the file system, but it must be an absolute file
1236 name--it is the caller's responsibility to ensure that it is an absolute file
1240 (define %gc-roots-directory
1241 ;; The place where garbage collector roots (symlinks) are kept.
1242 (string-append %state-directory "/gcroots"))
1244 (define (add-permanent-root target)
1245 "Add a garbage collector root pointing to TARGET, an element of the store,
1246 preventing TARGET from even being collected. This can also be used if TARGET
1249 Raise an error if the caller does not have write access to the GC root
1251 (let* ((root (string-append %gc-roots-directory "/" (basename target))))
1252 (catch 'system-error
1254 (symlink target root))
1256 ;; If ROOT already exists, this is fine; otherwise, re-throw.
1257 (unless (= EEXIST (system-error-errno args))
1258 (apply throw args))))))
1260 (define (remove-permanent-root target)
1261 "Remove the permanent garbage collector root pointing to TARGET. Raise an
1262 error if there is no such root."
1263 (delete-file (string-append %gc-roots-directory "/" (basename target))))
1266 (operation (query-references (store-path path))
1267 "Return the list of references of PATH."
1270 (define %reference-cache
1271 ;; Brute-force cache mapping store items to their list of references.
1272 ;; Caching matters because when building a profile in the presence of
1273 ;; grafts, we keep calling 'graft-derivation', which in turn calls
1274 ;; 'references/substitutes' many times with the same arguments. Ideally we
1275 ;; would use a cache associated with the daemon connection instead (XXX).
1276 (make-hash-table 100))
1278 (define (references/substitutes store items)
1279 "Return the list of list of references of ITEMS; the result has the same
1280 length as ITEMS. Query substitute information for any item missing from the
1281 store at once. Raise a '&store-protocol-error' exception if reference
1282 information for one of ITEMS is missing."
1283 (let* ((requested items)
1284 (local-refs (map (lambda (item)
1285 (or (hash-ref %reference-cache item)
1286 (guard (c ((store-protocol-error? c) #f))
1287 (references store item))))
1289 (missing (fold-right (lambda (item local-ref result)
1292 (cons item result)))
1296 ;; Query all the substitutes at once to minimize the cost of
1297 ;; launching 'guix substitute' and making HTTP requests.
1298 (substs (if (null? missing)
1300 (substitutable-path-info store missing))))
1301 (when (< (length substs) (length missing))
1302 (raise (condition (&store-protocol-error
1303 (message "cannot determine \
1304 the list of references")
1307 ;; Intersperse SUBSTS and LOCAL-REFS.
1308 (let loop ((items items)
1309 (local-refs local-refs)
1313 (let ((result (reverse result)))
1314 (for-each (cut hash-set! %reference-cache <> <>)
1321 (cons (any (lambda (subst)
1322 (and (string=? (substitutable-path subst) item)
1323 (substitutable-references subst)))
1328 (cons head result)))))))))
1330 (define* (fold-path store proc seed paths
1331 #:optional (relatives (cut references store <>)))
1332 "Call PROC for each of the RELATIVES of PATHS, exactly once, and return the
1333 result formed from the successive calls to PROC, the first of which is passed
1335 (let loop ((paths paths)
1340 (if (vhash-assoc path seen)
1341 (loop rest result seen)
1342 (let ((seen (vhash-cons path #t seen))
1343 (rest (append rest (relatives path)))
1344 (result (proc path result)))
1345 (loop rest result seen))))
1349 (define (requisites store paths)
1350 "Return the requisites of PATHS, including PATHS---i.e., their closures (all
1351 its references, recursively)."
1352 (fold-path store cons '() paths))
1354 (define (topologically-sorted store paths)
1355 "Return a list containing PATHS and all their references sorted in
1358 ;; Do a simple depth-first traversal of all of PATHS.
1359 (let loop ((paths paths)
1360 (visited vlist-null)
1363 (vhash-cons n #t visited))
1365 (define (visited? n)
1366 (vhash-assoc n visited))
1371 (loop tail visited result)
1374 (loop (references store head)
1377 (lambda (visited result)
1380 (cons head result))))))
1382 (values visited result)))))
1384 (call-with-values traverse
1389 (operation (query-referrers (store-path path))
1390 "Return the list of path that refer to PATH."
1393 (define valid-derivers
1394 (operation (query-valid-derivers (store-path path))
1395 "Return the list of valid \"derivers\" of PATH---i.e., all the
1396 .drv present in the store that have PATH among their outputs."
1399 (define query-derivation-outputs ; avoid name clash with `derivation-outputs'
1400 (operation (query-derivation-outputs (store-path path))
1401 "Return the list of outputs of PATH, a .drv file."
1404 (define-operation (has-substitutes? (store-path path))
1405 "Return #t if binary substitutes are available for PATH, and #f otherwise."
1408 (define substitutable-paths
1409 (operation (query-substitutable-paths (store-path-list paths))
1410 "Return the subset of PATHS that is substitutable."
1413 (define substitutable-path-info
1414 (operation (query-substitutable-path-infos (store-path-list paths))
1415 "Return information about the subset of PATHS that is
1416 substitutable. For each substitutable path, a `substitutable?' object is
1417 returned; thus, the resulting list can be shorter than PATHS. Furthermore,
1418 that there is no guarantee that the order of the resulting list matches the
1420 substitutable-path-list))
1422 (define %built-in-builders
1423 (let ((builders (operation (built-in-builders)
1424 "Return the built-in builders."
1427 "Return the names of the supported built-in derivation builders
1428 supported by STORE. The result is memoized for STORE."
1429 ;; Check whether STORE's version supports this RPC and built-in
1430 ;; derivation builders in general, which appeared in Guix > 0.11.0.
1431 ;; Return the empty list if it doesn't. Note that this RPC does not
1432 ;; exist in 'nix-daemon'.
1433 (if (or (> (store-connection-major-version store) #x100)
1434 (and (= (store-connection-major-version store) #x100)
1435 (>= (store-connection-minor-version store) #x60)))
1439 (define (built-in-builders store)
1440 "Return the names of the supported built-in derivation builders
1441 supported by STORE."
1442 (force (store-connection-built-in-builders store)))
1444 (define-operation (optimize-store)
1445 "Optimize the store by hard-linking identical files (\"deduplication\".)
1446 Return #t on success."
1447 ;; Note: the daemon in Guix <= 0.8.2 does not implement this RPC.
1450 (define verify-store
1451 (let ((verify (operation (verify-store (boolean check-contents?)
1455 (lambda* (store #:key check-contents? repair?)
1456 "Verify the integrity of the store and return false if errors remain,
1457 and true otherwise. When REPAIR? is true, repair any missing or altered store
1458 items by substituting them (this typically requires root privileges because it
1459 is not an atomic operation.) When CHECK-CONTENTS? is true, check the contents
1460 of store items; this can take a lot of time."
1461 (not (verify store check-contents? repair?)))))
1463 (define (run-gc server action to-delete min-freed)
1464 "Perform the garbage-collector operation ACTION, one of the
1465 `gc-action' values. When ACTION is `delete-specific', the TO-DELETE is
1466 the list of store paths to delete. IGNORE-LIVENESS? should always be
1467 #f. MIN-FREED is the minimum amount of disk space to be freed, in
1468 bytes, before the GC can stop. Return the list of store paths delete,
1469 and the number of bytes freed."
1470 (let ((s (store-connection-socket server)))
1471 (write-int (operation-id collect-garbage) s)
1472 (write-int action s)
1473 (write-store-path-list to-delete s)
1474 (write-arg boolean #f s) ; ignore-liveness?
1475 (write-long-long min-freed s)
1476 (write-int 0 s) ; obsolete
1477 (when (>= (store-connection-minor-version server) 5)
1478 ;; Obsolete `use-atime' and `max-atime' parameters.
1482 ;; Loop until the server is done sending error output.
1483 (let loop ((done? (process-stderr server)))
1484 (or done? (loop (process-stderr server))))
1486 (let ((paths (read-store-path-list s))
1487 (freed (read-long-long s))
1488 (obsolete (read-long-long s)))
1489 (unless (null? paths)
1490 ;; To be on the safe side, completely invalidate both caches.
1491 ;; Otherwise we could end up returning store paths that are no longer
1493 (hash-clear! (store-connection-add-to-store-cache server))
1494 (hash-clear! (store-connection-add-text-to-store-cache server)))
1496 (values paths freed))))
1498 (define-syntax-rule (%long-long-max)
1499 ;; Maximum unsigned 64-bit integer.
1502 (define (live-paths server)
1503 "Return the list of live store paths---i.e., store paths still
1504 referenced, and thus not subject to being garbage-collected."
1505 (run-gc server (gc-action return-live) '() (%long-long-max)))
1507 (define (dead-paths server)
1508 "Return the list of dead store paths---i.e., store paths no longer
1509 referenced, and thus subject to being garbage-collected."
1510 (run-gc server (gc-action return-dead) '() (%long-long-max)))
1512 (define* (collect-garbage server #:optional (min-freed (%long-long-max)))
1513 "Collect garbage from the store at SERVER. If MIN-FREED is non-zero,
1514 then collect at least MIN-FREED bytes. Return the paths that were
1515 collected, and the number of bytes freed."
1516 (run-gc server (gc-action delete-dead) '() min-freed))
1518 (define* (delete-paths server paths #:optional (min-freed (%long-long-max)))
1519 "Delete PATHS from the store at SERVER, if they are no longer
1520 referenced. If MIN-FREED is non-zero, then stop after at least
1521 MIN-FREED bytes have been collected. Return the paths that were
1522 collected, and the number of bytes freed."
1523 (run-gc server (gc-action delete-specific) paths min-freed))
1525 (define (import-paths server port)
1526 "Import the set of store paths read from PORT into SERVER's store. An error
1527 is raised if the set of paths read from PORT is not signed (as per
1528 'export-path #:sign? #t'.) Return the list of store paths imported."
1529 (let ((s (store-connection-socket server)))
1530 (write-int (operation-id import-paths) s)
1531 (let loop ((done? (process-stderr server port)))
1532 (or done? (loop (process-stderr server port))))
1533 (read-store-path-list s)))
1535 (define* (export-path server path port #:key (sign? #t))
1536 "Export PATH to PORT. When SIGN? is true, sign it."
1537 (let ((s (store-connection-socket server)))
1538 (write-int (operation-id export-path) s)
1539 (write-store-path path s)
1540 (write-arg boolean sign? s)
1541 (let loop ((done? (process-stderr server port)))
1542 (or done? (loop (process-stderr server port))))
1543 (= 1 (read-int s))))
1545 (define* (export-paths server paths port #:key (sign? #t) recursive?)
1546 "Export the store paths listed in PATHS to PORT, in topological order,
1547 signing them if SIGN? is true. When RECURSIVE? is true, export the closure of
1548 PATHS---i.e., PATHS and all their dependencies."
1550 (let ((sorted (topologically-sorted server paths)))
1551 ;; When RECURSIVE? is #f, filter out the references of PATHS.
1554 (filter (cut member <> paths) sorted))))
1556 (let loop ((paths ordered))
1562 (and (export-path server head port #:sign? sign?)
1565 (define-operation (query-failed-paths)
1566 "Return the list of store items for which a build failure is cached.
1568 The result is always the empty list unless the daemon was started with
1569 '--cache-failures'."
1572 (define-operation (clear-failed-paths (store-path-list items))
1573 "Remove ITEMS from the list of cached build failures.
1575 This makes sense only when the daemon was started with '--cache-failures'."
1583 (define-syntax-rule (define-alias new old)
1584 (define-syntax new (identifier-syntax old)))
1586 ;; The store monad allows us to (1) build sequences of operations in the
1587 ;; store, and (2) make the store an implicit part of the execution context,
1588 ;; rather than a parameter of every single function.
1589 (define-alias %store-monad %state-monad)
1590 (define-alias store-return state-return)
1591 (define-alias store-bind state-bind)
1593 ;; Instantiate templates for %STORE-MONAD since it's syntactically different
1594 ;; from %STATE-MONAD.
1595 (template-directory instantiations %store-monad)
1597 (define* (cache-object-mapping object keys result)
1598 "Augment the store's object cache with a mapping from OBJECT/KEYS to RESULT.
1599 KEYS is a list of additional keys to match against, for instance a (SYSTEM
1602 OBJECT is typically a high-level object such as a <package> or an <origin>,
1603 and RESULT is typically its derivation."
1608 (object-cache (vhash-consq object (cons result keys)
1609 (store-connection-object-cache store)))))))
1611 (define record-cache-lookup!
1612 (if (profiled? "object-cache")
1616 (register-profiling-hook!
1619 (format (current-error-port) "Store object cache:
1622 hits: ~5@a (~,1f%)~%"
1626 (* 100. (/ hits lookups))))))
1628 (lambda (hit? cache)
1630 (if (eq? cache vlist-null)
1633 (set! lookups (+ 1 lookups))
1634 (set! hits (if hit? (+ hits 1) hits))))
1638 (define* (lookup-cached-object object #:optional (keys '()))
1639 "Return the cached object in the store connection corresponding to OBJECT
1640 and KEYS. KEYS is a list of additional keys to match against, and which are
1641 compared with 'equal?'. Return #f on failure and the cached result
1644 (let* ((cache (store-connection-object-cache store))
1646 ;; Escape as soon as we find the result. This avoids traversing
1647 ;; the whole vlist chain and significantly reduces the number of
1649 (value (let/ec return
1650 (vhash-foldq* (lambda (item result)
1653 (if (equal? keys keys*)
1658 (record-cache-lookup! value cache)
1659 (values value store))))
1661 (define* (%mcached mthunk object #:optional (keys '()))
1662 "Bind the monadic value returned by MTHUNK, which supposedly corresponds to
1663 OBJECT/KEYS, or return its cached value."
1664 (mlet %store-monad ((cached (lookup-cached-object object keys)))
1669 (cache-object-mapping object keys result))))))
1671 (define-syntax-rule (mcached mvalue object keys ...)
1672 "Run MVALUE, which corresponds to OBJECT/KEYS, and cache it; or return the
1673 value associated with OBJECT/KEYS in the store's object cache if there is
1675 (%mcached (lambda () mvalue)
1676 object (list keys ...)))
1678 (define (preserve-documentation original proc)
1679 "Return PROC with documentation taken from ORIGINAL."
1680 (set-object-property! proc 'documentation
1681 (procedure-property original 'documentation))
1684 (define (store-lift proc)
1685 "Lift PROC, a procedure whose first argument is a connection to the store,
1686 in the store monad."
1687 (preserve-documentation proc
1690 (values (apply proc store args) store)))))
1692 (define (store-lower proc)
1693 "Lower PROC, a monadic procedure in %STORE-MONAD, to a \"normal\" procedure
1694 taking the store as its first argument."
1695 (preserve-documentation proc
1696 (lambda (store . args)
1697 (run-with-store store (apply proc args)))))
1700 ;; Store monad operators.
1703 (define* (binary-file name
1705 #:optional (references '()))
1706 "Return as a monadic value the absolute file name in the store of the file
1707 containing DATA, a bytevector. REFERENCES is a list of store items that the
1708 resulting text file refers to; it defaults to the empty list."
1710 (values (add-data-to-store store name data references)
1713 (define* (text-file name
1715 #:optional (references '()))
1716 "Return as a monadic value the absolute file name in the store of the file
1717 containing TEXT, a string. REFERENCES is a list of store items that the
1718 resulting text file refers to; it defaults to the empty list."
1720 (values (add-text-to-store store name text references)
1723 (define* (interned-file file #:optional name
1724 #:key (recursive? #t) (select? true))
1725 "Return the name of FILE once interned in the store. Use NAME as its store
1726 name, or the basename of FILE if NAME is omitted.
1728 When RECURSIVE? is true, the contents of FILE are added recursively; if FILE
1729 designates a flat file and RECURSIVE? is true, its contents are added, and its
1730 permission bits are kept.
1732 When RECURSIVE? is true, call (SELECT? FILE STAT) for each directory entry,
1733 where FILE is the entry's absolute file name and STAT is the result of
1734 'lstat'; exclude entries for which SELECT? does not return true."
1736 (values (add-to-store store (or name (basename file))
1737 recursive? "sha256" file
1741 (define interned-file-tree
1742 (store-lift add-file-tree-to-store))
1745 ;; Monadic variant of 'build-things'.
1746 (store-lift build-things))
1748 (define set-build-options*
1749 (store-lift set-build-options))
1752 (store-lift references))
1754 (define (query-path-info* item)
1755 "Monadic version of 'query-path-info' that returns #f when ITEM is not in
1758 (guard (c ((store-protocol-error? c)
1759 ;; ITEM is not in the store; return #f.
1761 (values (query-path-info store item) store))))
1763 (define-inlinable (current-system)
1764 ;; Consult the %CURRENT-SYSTEM fluid at bind time. This is equivalent to
1765 ;; (lift0 %current-system %store-monad), but inlinable, thus avoiding
1766 ;; closure allocation in some cases.
1768 (values (%current-system) state)))
1770 (define-inlinable (set-current-system system)
1771 ;; Set the %CURRENT-SYSTEM fluid at bind time.
1773 (values (%current-system system) state)))
1775 (define %guile-for-build
1776 ;; The derivation of the Guile to be used within the build environment,
1777 ;; when using 'gexp->derivation' and co.
1778 (make-parameter #f))
1780 (define* (run-with-store store mval
1782 (guile-for-build (%guile-for-build))
1783 (system (%current-system))
1785 "Run MVAL, a monadic value in the store monad, in STORE, an open store
1786 connection, and return the result."
1787 ;; Initialize the dynamic bindings here to avoid bad surprises. The
1788 ;; difficulty lies in the fact that dynamic bindings are resolved at
1789 ;; bind-time and not at call time, which can be disconcerting.
1790 (parameterize ((%guile-for-build guile-for-build)
1791 (%current-system system)
1792 (%current-target-system target))
1793 (call-with-values (lambda ()
1794 (run-with-state mval store))
1795 (lambda (result store)
1796 ;; Discard the state.
1804 (define %store-prefix
1805 ;; Absolute path to the Nix store.
1806 (make-parameter %store-directory))
1808 (define (compressed-hash bv size) ; `compressHash'
1809 "Given the hash stored in BV, return a compressed version thereof that fits
1811 (define new (make-bytevector size 0))
1812 (define old-size (bytevector-length bv))
1816 (let* ((j (modulo i size))
1817 (o (bytevector-u8-ref new j)))
1818 (bytevector-u8-set! new j
1819 (logxor o (bytevector-u8-ref bv i)))
1822 (define (store-path type hash name) ; makeStorePath
1823 "Return the store path for NAME/HASH/TYPE."
1824 (let* ((s (string-append type ":sha256:"
1825 (bytevector->base16-string hash) ":"
1826 (%store-prefix) ":" name))
1827 (h (sha256 (string->utf8 s)))
1828 (c (compressed-hash h 20)))
1829 (string-append (%store-prefix) "/"
1830 (bytevector->nix-base32-string c) "-"
1833 (define (output-path output hash name) ; makeOutputPath
1834 "Return an output path for OUTPUT (the name of the output as a string) of
1835 the derivation called NAME with hash HASH."
1836 (store-path (string-append "output:" output) hash
1837 (if (string=? output "out")
1839 (string-append name "-" output))))
1841 (define* (fixed-output-path name hash
1846 "Return an output path for the fixed output OUTPUT defined by HASH of type
1847 HASH-ALGO, of the derivation NAME. RECURSIVE? has the same meaning as for
1849 (if (and recursive? (eq? hash-algo 'sha256))
1850 (store-path "source" hash name)
1851 (let ((tag (string-append "fixed:" output ":"
1852 (if recursive? "r:" "")
1853 (symbol->string hash-algo) ":"
1854 (bytevector->base16-string hash) ":")))
1855 (store-path (string-append "output:" output)
1856 (sha256 (string->utf8 tag))
1859 (define (store-path? path)
1860 "Return #t if PATH is a store path."
1861 ;; This is a lightweight check, compared to using a regexp, but this has to
1862 ;; be fast as it's called often in `derivation', for instance.
1863 ;; `isStorePath' in Nix does something similar.
1864 (string-prefix? (%store-prefix) path))
1866 (define (direct-store-path? path)
1867 "Return #t if PATH is a store path, and not a sub-directory of a store path.
1868 This predicate is sometimes needed because files *under* a store path are not
1870 (and (store-path? path)
1871 (not (string=? path (%store-prefix)))
1872 (let ((len (+ 1 (string-length (%store-prefix)))))
1873 (not (string-index (substring path len) #\/)))))
1875 (define (direct-store-path path)
1876 "Return the direct store path part of PATH, stripping components after
1877 '/gnu/store/xxxx-foo'."
1878 (let ((prefix-length (+ (string-length (%store-prefix)) 35)))
1879 (if (> (string-length path) prefix-length)
1880 (let ((slash (string-index path #\/ prefix-length)))
1881 (if slash (string-take path slash) path))
1884 (define (derivation-path? path)
1885 "Return #t if PATH is a derivation path."
1886 (and (store-path? path) (string-suffix? ".drv" path)))
1888 (define store-regexp*
1889 ;; The substituter makes repeated calls to 'store-path-hash-part', hence
1890 ;; this optimization.
1892 "Return a regexp matching a file in STORE."
1893 (make-regexp (string-append "^" (regexp-quote store)
1894 "/([0-9a-df-np-sv-z]{32})-([^/]+)$"))))
1896 (define (store-path-package-name path)
1897 "Return the package name part of PATH, a file name in the store."
1898 (let ((path-rx (store-regexp* (%store-prefix))))
1899 (and=> (regexp-exec path-rx path)
1900 (cut match:substring <> 2))))
1902 (define (store-path-hash-part path)
1903 "Return the hash part of PATH as a base32 string, or #f if PATH is not a
1904 syntactically valid store path."
1905 (and (string-prefix? (%store-prefix) path)
1906 (let ((base (string-drop path (+ 1 (string-length (%store-prefix))))))
1907 (and (> (string-length base) 33)
1908 (let ((hash (string-take base 32)))
1909 (and (string-every %nix-base32-charset hash)
1912 (define (derivation-log-file drv)
1913 "Return the build log file for DRV, a derivation file name, or #f if it
1914 could not be found."
1915 (let* ((base (basename drv))
1916 (log (string-append (or (getenv "GUIX_LOG_DIRECTORY")
1917 (string-append %localstatedir "/log/guix"))
1919 (string-take base 2) "/"
1920 (string-drop base 2)))
1921 (log.gz (string-append log ".gz"))
1922 (log.bz2 (string-append log ".bz2")))
1923 (cond ((file-exists? log.gz) log.gz)
1924 ((file-exists? log.bz2) log.bz2)
1925 ((file-exists? log) log)
1928 (define (log-file store file)
1929 "Return the build log file for FILE, or #f if none could be found. FILE
1930 must be an absolute store file name, or a derivation file name."
1931 (cond ((derivation-path? file)
1932 (derivation-log-file file))
1934 (match (valid-derivers store file)
1936 ;; Return the first that works.
1937 (any (cut log-file store <>) derivers))
1940 ;;; Local Variables:
1941 ;;; eval: (put 'system-error-to-connection-error 'scheme-indent-function 1)