768 lines
28 KiB
Scheme
768 lines
28 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2012, 2013 Ludovic Courtès <ludo@gnu.org>
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;;;
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;;; This file is part of GNU Guix.
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;;;
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;;; GNU Guix is free software; you can redistribute it and/or modify it
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;;; under the terms of the GNU General Public License as published by
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;;; the Free Software Foundation; either version 3 of the License, or (at
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;;; your option) any later version.
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;;;
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;;; GNU Guix is distributed in the hope that it will be useful, but
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;;; WITHOUT ANY WARRANTY; without even the implied warranty of
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;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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;;; GNU General Public License for more details.
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;;;
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;;; You should have received a copy of the GNU General Public License
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;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (guix store)
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#:use-module (guix nar)
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#:use-module (guix utils)
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#:use-module (guix config)
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#:use-module (guix serialization)
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#:use-module (rnrs bytevectors)
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#:use-module (rnrs io ports)
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#:use-module (srfi srfi-1)
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#:use-module (srfi srfi-9)
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#:use-module (srfi srfi-9 gnu)
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#:use-module (srfi srfi-26)
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#:use-module (srfi srfi-34)
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#:use-module (srfi srfi-35)
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#:use-module (srfi srfi-39)
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#:use-module (ice-9 match)
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#:use-module (ice-9 regex)
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#:use-module (ice-9 vlist)
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#:export (%daemon-socket-file
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nix-server?
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nix-server-major-version
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nix-server-minor-version
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nix-server-socket
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&nix-error nix-error?
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&nix-connection-error nix-connection-error?
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nix-connection-error-file
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nix-connection-error-code
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&nix-protocol-error nix-protocol-error?
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nix-protocol-error-message
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nix-protocol-error-status
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hash-algo
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open-connection
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close-connection
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set-build-options
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valid-path?
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query-path-hash
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add-text-to-store
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add-to-store
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build-derivations
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add-temp-root
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add-indirect-root
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substitutable?
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substitutable-path
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substitutable-deriver
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substitutable-references
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substitutable-download-size
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substitutable-nar-size
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has-substitutes?
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substitutable-paths
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substitutable-path-info
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references
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requisites
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referrers
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valid-derivers
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query-derivation-outputs
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live-paths
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dead-paths
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collect-garbage
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delete-paths
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import-paths
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export-paths
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current-build-output-port
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%store-prefix
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store-path?
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direct-store-path?
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derivation-path?
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store-path-package-name
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store-path-hash-part
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log-file))
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(define %protocol-version #x10c)
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(define %worker-magic-1 #x6e697863)
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(define %worker-magic-2 #x6478696f)
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(define (protocol-major magic)
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(logand magic #xff00))
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(define (protocol-minor magic)
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(logand magic #x00ff))
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(define-syntax define-enumerate-type
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(syntax-rules ()
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((_ name->int (name id) ...)
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(define-syntax name->int
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(syntax-rules (name ...)
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((_ name) id) ...)))))
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(define-enumerate-type operation-id
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;; operation numbers from worker-protocol.hh
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(quit 0)
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(valid-path? 1)
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(has-substitutes? 3)
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(query-path-hash 4)
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(query-references 5)
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(query-referrers 6)
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(add-to-store 7)
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(add-text-to-store 8)
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(build-derivations 9)
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(ensure-path 10)
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(add-temp-root 11)
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(add-indirect-root 12)
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(sync-with-gc 13)
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(find-roots 14)
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(export-path 16)
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(query-deriver 18)
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(set-options 19)
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(collect-garbage 20)
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;;(query-substitutable-path-info 21) ; obsolete as of #x10c
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(query-derivation-outputs 22)
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(query-all-valid-paths 23)
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(query-failed-paths 24)
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(clear-failed-paths 25)
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(query-path-info 26)
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(import-paths 27)
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(query-derivation-output-names 28)
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(query-path-from-hash-part 29)
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(query-substitutable-path-infos 30)
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(query-valid-paths 31)
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(query-substitutable-paths 32)
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(query-valid-derivers 33))
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(define-enumerate-type hash-algo
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;; hash.hh
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(md5 1)
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(sha1 2)
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(sha256 3))
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(define-enumerate-type gc-action
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;; store-api.hh
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(return-live 0)
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(return-dead 1)
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(delete-dead 2)
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(delete-specific 3))
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(define %default-socket-path
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(string-append (or (getenv "NIX_STATE_DIR") %state-directory)
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"/daemon-socket/socket"))
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(define %daemon-socket-file
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;; File name of the socket the daemon listens too.
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(make-parameter (or (getenv "GUIX_DAEMON_SOCKET")
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%default-socket-path)))
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;; Information about a substitutable store path.
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(define-record-type <substitutable>
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(substitutable path deriver refs dl-size nar-size)
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substitutable?
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(path substitutable-path)
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(deriver substitutable-deriver)
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(refs substitutable-references)
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(dl-size substitutable-download-size)
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(nar-size substitutable-nar-size))
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(define (read-substitutable-path-list p)
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(let loop ((len (read-int p))
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(result '()))
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(if (zero? len)
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(reverse result)
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(let ((path (read-store-path p))
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(deriver (read-store-path p))
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(refs (read-store-path-list p))
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(dl-size (read-long-long p))
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(nar-size (read-long-long p)))
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(loop (- len 1)
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(cons (substitutable path deriver refs dl-size nar-size)
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result))))))
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(define-syntax write-arg
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(syntax-rules (integer boolean file string string-list
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store-path store-path-list base16)
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((_ integer arg p)
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(write-int arg p))
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((_ boolean arg p)
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(write-int (if arg 1 0) p))
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((_ file arg p)
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(write-file arg p))
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((_ string arg p)
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(write-string arg p))
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((_ string-list arg p)
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(write-string-list arg p))
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((_ store-path arg p)
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(write-store-path arg p))
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((_ store-path-list arg p)
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(write-store-path-list arg p))
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((_ base16 arg p)
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(write-string (bytevector->base16-string arg) p))))
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(define-syntax read-arg
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(syntax-rules (integer boolean string store-path store-path-list
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substitutable-path-list base16)
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((_ integer p)
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(read-int p))
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((_ boolean p)
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(not (zero? (read-int p))))
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((_ string p)
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(read-string p))
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((_ store-path p)
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(read-store-path p))
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((_ store-path-list p)
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(read-store-path-list p))
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((_ substitutable-path-list p)
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(read-substitutable-path-list p))
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((_ base16 p)
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(base16-string->bytevector (read-string p)))))
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;; remote-store.cc
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(define-record-type <nix-server>
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(%make-nix-server socket major minor
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ats-cache atts-cache)
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nix-server?
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(socket nix-server-socket)
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(major nix-server-major-version)
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(minor nix-server-minor-version)
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;; Caches. We keep them per-connection, because store paths build
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;; during the session are temporary GC roots kept for the duration of
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;; the session.
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(ats-cache nix-server-add-to-store-cache)
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(atts-cache nix-server-add-text-to-store-cache))
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(set-record-type-printer! <nix-server>
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(lambda (obj port)
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(format port "#<build-daemon ~a.~a ~a>"
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(nix-server-major-version obj)
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(nix-server-minor-version obj)
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(number->string (object-address obj)
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16))))
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(define-condition-type &nix-error &error
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nix-error?)
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(define-condition-type &nix-connection-error &nix-error
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nix-connection-error?
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(file nix-connection-error-file)
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(errno nix-connection-error-code))
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(define-condition-type &nix-protocol-error &nix-error
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nix-protocol-error?
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(message nix-protocol-error-message)
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(status nix-protocol-error-status))
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(define* (open-connection #:optional (file (%daemon-socket-file))
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#:key (reserve-space? #t))
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"Connect to the daemon over the Unix-domain socket at FILE. When
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RESERVE-SPACE? is true, instruct it to reserve a little bit of extra
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space on the file system so that the garbage collector can still
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operate, should the disk become full. Return a server object."
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(let ((s (with-fluids ((%default-port-encoding #f))
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;; This trick allows use of the `scm_c_read' optimization.
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(socket PF_UNIX SOCK_STREAM 0)))
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(a (make-socket-address PF_UNIX file)))
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(catch 'system-error
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(lambda ()
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;; Enlarge the receive buffer.
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(setsockopt s SOL_SOCKET SO_RCVBUF (* 12 1024)))
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(lambda args
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;; On the Hurd, the pflocal server's implementation of `socket_setopt'
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;; always returns ENOPROTOOPT. Ignore it.
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(unless (= (system-error-errno args) ENOPROTOOPT)
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(apply throw args))))
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(catch 'system-error
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(cut connect s a)
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(lambda args
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;; Translate the error to something user-friendly.
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(let ((errno (system-error-errno args)))
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(raise (condition (&nix-connection-error
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(file file)
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(errno errno)))))))
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(write-int %worker-magic-1 s)
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(let ((r (read-int s)))
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(and (eqv? r %worker-magic-2)
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(let ((v (read-int s)))
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(and (eqv? (protocol-major %protocol-version)
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(protocol-major v))
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(begin
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(write-int %protocol-version s)
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(if (>= (protocol-minor v) 11)
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(write-int (if reserve-space? 1 0) s))
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(let ((s (%make-nix-server s
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(protocol-major v)
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(protocol-minor v)
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(make-hash-table 100)
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(make-hash-table 100))))
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(let loop ((done? (process-stderr s)))
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(or done? (process-stderr s)))
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s))))))))
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(define (close-connection server)
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"Close the connection to SERVER."
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(close (nix-server-socket server)))
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(define current-build-output-port
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;; The port where build output is sent.
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(make-parameter (current-error-port)))
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(define* (dump-port in out
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#:optional len
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#:key (buffer-size 16384))
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"Read LEN bytes from IN (or as much as possible if LEN is #f) and write it
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to OUT, using chunks of BUFFER-SIZE bytes."
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(define buffer
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(make-bytevector buffer-size))
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(let loop ((total 0)
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(bytes (get-bytevector-n! in buffer 0
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(if len
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(min len buffer-size)
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buffer-size))))
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(or (eof-object? bytes)
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(and len (= total len))
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(let ((total (+ total bytes)))
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(put-bytevector out buffer 0 bytes)
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(loop total
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(get-bytevector-n! in buffer 0
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(if len
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(min (- len total) buffer-size)
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buffer-size)))))))
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(define* (process-stderr server #:optional user-port)
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"Read standard output and standard error from SERVER, writing it to
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CURRENT-BUILD-OUTPUT-PORT. Return #t when SERVER is done sending data, and
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#f otherwise; in the latter case, the caller should call `process-stderr'
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again until #t is returned or an error is raised.
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Since the build process's output cannot be assumed to be UTF-8, we
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conservatively consider it to be Latin-1, thereby avoiding possible
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encoding conversion errors."
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(define p
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(nix-server-socket server))
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;; magic cookies from worker-protocol.hh
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(define %stderr-next #x6f6c6d67)
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(define %stderr-read #x64617461) ; data needed from source
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(define %stderr-write #x64617416) ; data for sink
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(define %stderr-last #x616c7473)
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(define %stderr-error #x63787470)
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(let ((k (read-int p)))
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(cond ((= k %stderr-write)
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;; Write a byte stream to USER-PORT.
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(let* ((len (read-int p))
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(m (modulo len 8)))
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(dump-port p user-port len)
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(unless (zero? m)
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;; Consume padding, as for strings.
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(get-bytevector-n p (- 8 m))))
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#f)
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((= k %stderr-read)
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;; Read a byte stream from USER-PORT.
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(let* ((max-len (read-int p))
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(data (get-bytevector-n user-port max-len))
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(len (bytevector-length data)))
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(write-int len p)
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(put-bytevector p data)
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(write-padding len p)
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#f))
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((= k %stderr-next)
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;; Log a string.
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(let ((s (read-latin1-string p)))
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(display s (current-build-output-port))
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#f))
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((= k %stderr-error)
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;; Report an error.
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(let ((error (read-latin1-string p))
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;; Currently the daemon fails to send a status code for early
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;; errors like DB schema version mismatches, so check for EOF.
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(status (if (and (>= (nix-server-minor-version server) 8)
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(not (eof-object? (lookahead-u8 p))))
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(read-int p)
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1)))
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(raise (condition (&nix-protocol-error
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(message error)
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(status status))))))
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((= k %stderr-last)
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;; The daemon is done (see `stopWork' in `nix-worker.cc'.)
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#t)
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(else
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(raise (condition (&nix-protocol-error
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(message "invalid error code")
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(status k))))))))
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(define* (set-build-options server
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#:key keep-failed? keep-going? fallback?
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(verbosity 0)
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(max-build-jobs (current-processor-count))
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(max-silent-time 3600)
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(use-build-hook? #t)
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(build-verbosity 0)
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(log-type 0)
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(print-build-trace #t)
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(build-cores 1)
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(use-substitutes? #t)
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(binary-caches '())) ; client "untrusted" cache URLs
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;; Must be called after `open-connection'.
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(define socket
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(nix-server-socket server))
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(let-syntax ((send (syntax-rules ()
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((_ (type option) ...)
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(begin
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(write-arg type option socket)
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...)))))
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(write-int (operation-id set-options) socket)
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(send (boolean keep-failed?) (boolean keep-going?)
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(boolean fallback?) (integer verbosity)
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(integer max-build-jobs) (integer max-silent-time))
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(if (>= (nix-server-minor-version server) 2)
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(send (boolean use-build-hook?)))
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(if (>= (nix-server-minor-version server) 4)
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(send (integer build-verbosity) (integer log-type)
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(boolean print-build-trace)))
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(if (>= (nix-server-minor-version server) 6)
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(send (integer build-cores)))
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(if (>= (nix-server-minor-version server) 10)
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(send (boolean use-substitutes?)))
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(if (>= (nix-server-minor-version server) 12)
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(send (string-list (fold-right (lambda (pair result)
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(match pair
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((h . t)
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(cons* h t result))))
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'()
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binary-caches))))
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(let loop ((done? (process-stderr server)))
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(or done? (process-stderr server)))))
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(define-syntax operation
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(syntax-rules ()
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"Define a client-side RPC stub for the given operation."
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((_ (name (type arg) ...) docstring return ...)
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(lambda (server arg ...)
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docstring
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(let ((s (nix-server-socket server)))
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(write-int (operation-id name) s)
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(write-arg type arg s)
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...
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;; Loop until the server is done sending error output.
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(let loop ((done? (process-stderr server)))
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(or done? (loop (process-stderr server))))
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(values (read-arg return s) ...))))))
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(define-syntax-rule (define-operation (name args ...)
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docstring return ...)
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(define name
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(operation (name args ...) docstring return ...)))
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(define-operation (valid-path? (string path))
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"Return #t when PATH is a valid store path."
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boolean)
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(define-operation (query-path-hash (store-path path))
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"Return the SHA256 hash of PATH as a bytevector."
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base16)
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(define add-text-to-store
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;; A memoizing version of `add-to-store', to avoid repeated RPCs with
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;; the very same arguments during a given session.
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(let ((add-text-to-store
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(operation (add-text-to-store (string name) (string text)
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(string-list references))
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#f
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store-path)))
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(lambda* (server name text #:optional (references '()))
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"Add TEXT under file NAME in the store, and return its store path.
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REFERENCES is the list of store paths referred to by the resulting store
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path."
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(let ((args `(,text ,name ,references))
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(cache (nix-server-add-text-to-store-cache server)))
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(or (hash-ref cache args)
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(let ((path (add-text-to-store server name text references)))
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(hash-set! cache args path)
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path))))))
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(define add-to-store
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;; A memoizing version of `add-to-store'. This is important because
|
||
;; `add-to-store' leads to huge data transfers to the server, and
|
||
;; because it's often called many times with the very same argument.
|
||
(let ((add-to-store (operation (add-to-store (string basename)
|
||
(boolean fixed?) ; obsolete, must be #t
|
||
(boolean recursive?)
|
||
(string hash-algo)
|
||
(file file-name))
|
||
#f
|
||
store-path)))
|
||
(lambda (server basename recursive? hash-algo file-name)
|
||
"Add the contents of FILE-NAME under BASENAME to the store. When
|
||
RECURSIVE? is true and FILE-NAME designates a directory, the contents of
|
||
FILE-NAME are added recursively; if FILE-NAME designates a flat file and
|
||
RECURSIVE? is true, its contents are added, and its permission bits are
|
||
kept. HASH-ALGO must be a string such as \"sha256\"."
|
||
(let* ((st (stat file-name #f))
|
||
(args `(,st ,basename ,recursive? ,hash-algo))
|
||
(cache (nix-server-add-to-store-cache server)))
|
||
(or (and st (hash-ref cache args))
|
||
(let ((path (add-to-store server basename #t recursive?
|
||
hash-algo file-name)))
|
||
(hash-set! cache args path)
|
||
path))))))
|
||
|
||
(define-operation (build-derivations (string-list derivations))
|
||
"Build DERIVATIONS, and return when the worker is done building them.
|
||
Return #t on success."
|
||
boolean)
|
||
|
||
(define-operation (add-temp-root (store-path path))
|
||
"Make PATH a temporary root for the duration of the current session.
|
||
Return #t."
|
||
boolean)
|
||
|
||
(define-operation (add-indirect-root (string file-name))
|
||
"Make FILE-NAME an indirect root for the garbage collector; FILE-NAME
|
||
can be anywhere on the file system, but it must be an absolute file
|
||
name--it is the caller's responsibility to ensure that it is an absolute
|
||
file name. Return #t on success."
|
||
boolean)
|
||
|
||
(define references
|
||
(operation (query-references (store-path path))
|
||
"Return the list of references of PATH."
|
||
store-path-list))
|
||
|
||
(define* (fold-path store proc seed path
|
||
#:optional (relatives (cut references store <>)))
|
||
"Call PROC for each of the RELATIVES of PATH, exactly once, and return the
|
||
result formed from the successive calls to PROC, the first of which is passed
|
||
SEED."
|
||
(let loop ((paths (list path))
|
||
(result seed)
|
||
(seen vlist-null))
|
||
(match paths
|
||
((path rest ...)
|
||
(if (vhash-assoc path seen)
|
||
(loop rest result seen)
|
||
(let ((seen (vhash-cons path #t seen))
|
||
(rest (append rest (relatives path)))
|
||
(result (proc path result)))
|
||
(loop rest result seen))))
|
||
(()
|
||
result))))
|
||
|
||
(define (requisites store path)
|
||
"Return the requisites of PATH, including PATH---i.e., its closure (all its
|
||
references, recursively)."
|
||
(fold-path store cons '() path))
|
||
|
||
(define referrers
|
||
(operation (query-referrers (store-path path))
|
||
"Return the list of path that refer to PATH."
|
||
store-path-list))
|
||
|
||
(define valid-derivers
|
||
(operation (query-valid-derivers (store-path path))
|
||
"Return the list of valid \"derivers\" of PATH---i.e., all the
|
||
.drv present in the store that have PATH among their outputs."
|
||
store-path-list))
|
||
|
||
(define query-derivation-outputs ; avoid name clash with `derivation-outputs'
|
||
(operation (query-derivation-outputs (store-path path))
|
||
"Return the list of outputs of PATH, a .drv file."
|
||
store-path-list))
|
||
|
||
(define-operation (has-substitutes? (store-path path))
|
||
"Return #t if binary substitutes are available for PATH, and #f otherwise."
|
||
boolean)
|
||
|
||
(define substitutable-paths
|
||
(operation (query-substitutable-paths (store-path-list paths))
|
||
"Return the subset of PATHS that is substitutable."
|
||
store-path-list))
|
||
|
||
(define substitutable-path-info
|
||
(operation (query-substitutable-path-infos (store-path-list paths))
|
||
"Return information about the subset of PATHS that is
|
||
substitutable. For each substitutable path, a `substitutable?' object is
|
||
returned."
|
||
substitutable-path-list))
|
||
|
||
(define (run-gc server action to-delete min-freed)
|
||
"Perform the garbage-collector operation ACTION, one of the
|
||
`gc-action' values. When ACTION is `delete-specific', the TO-DELETE is
|
||
the list of store paths to delete. IGNORE-LIVENESS? should always be
|
||
#f. MIN-FREED is the minimum amount of disk space to be freed, in
|
||
bytes, before the GC can stop. Return the list of store paths delete,
|
||
and the number of bytes freed."
|
||
(let ((s (nix-server-socket server)))
|
||
(write-int (operation-id collect-garbage) s)
|
||
(write-int action s)
|
||
(write-store-path-list to-delete s)
|
||
(write-arg boolean #f s) ; ignore-liveness?
|
||
(write-long-long min-freed s)
|
||
(write-int 0 s) ; obsolete
|
||
(when (>= (nix-server-minor-version server) 5)
|
||
;; Obsolete `use-atime' and `max-atime' parameters.
|
||
(write-int 0 s)
|
||
(write-int 0 s))
|
||
|
||
;; Loop until the server is done sending error output.
|
||
(let loop ((done? (process-stderr server)))
|
||
(or done? (loop (process-stderr server))))
|
||
|
||
(let ((paths (read-store-path-list s))
|
||
(freed (read-long-long s))
|
||
(obsolete (read-long-long s)))
|
||
(values paths freed))))
|
||
|
||
(define-syntax-rule (%long-long-max)
|
||
;; Maximum unsigned 64-bit integer.
|
||
(- (expt 2 64) 1))
|
||
|
||
(define (live-paths server)
|
||
"Return the list of live store paths---i.e., store paths still
|
||
referenced, and thus not subject to being garbage-collected."
|
||
(run-gc server (gc-action return-live) '() (%long-long-max)))
|
||
|
||
(define (dead-paths server)
|
||
"Return the list of dead store paths---i.e., store paths no longer
|
||
referenced, and thus subject to being garbage-collected."
|
||
(run-gc server (gc-action return-dead) '() (%long-long-max)))
|
||
|
||
(define* (collect-garbage server #:optional (min-freed (%long-long-max)))
|
||
"Collect garbage from the store at SERVER. If MIN-FREED is non-zero,
|
||
then collect at least MIN-FREED bytes. Return the paths that were
|
||
collected, and the number of bytes freed."
|
||
(run-gc server (gc-action delete-dead) '() min-freed))
|
||
|
||
(define* (delete-paths server paths #:optional (min-freed (%long-long-max)))
|
||
"Delete PATHS from the store at SERVER, if they are no longer
|
||
referenced. If MIN-FREED is non-zero, then stop after at least
|
||
MIN-FREED bytes have been collected. Return the paths that were
|
||
collected, and the number of bytes freed."
|
||
(run-gc server (gc-action delete-specific) paths min-freed))
|
||
|
||
(define (import-paths server port)
|
||
"Import the set of store paths read from PORT into SERVER's store. An error
|
||
is raised if the set of paths read from PORT is not signed (as per
|
||
'export-path #:sign? #t'.) Return the list of store paths imported."
|
||
(let ((s (nix-server-socket server)))
|
||
(write-int (operation-id import-paths) s)
|
||
(let loop ((done? (process-stderr server port)))
|
||
(or done? (loop (process-stderr server port))))
|
||
(read-store-path-list s)))
|
||
|
||
(define* (export-path server path port #:key (sign? #t))
|
||
"Export PATH to PORT. When SIGN? is true, sign it."
|
||
(let ((s (nix-server-socket server)))
|
||
(write-int (operation-id export-path) s)
|
||
(write-store-path path s)
|
||
(write-arg boolean sign? s)
|
||
(let loop ((done? (process-stderr server port)))
|
||
(or done? (loop (process-stderr server port))))
|
||
(= 1 (read-int s))))
|
||
|
||
(define* (export-paths server paths port #:key (sign? #t))
|
||
"Export the store paths listed in PATHS to PORT, signing them if SIGN?
|
||
is true."
|
||
(let ((s (nix-server-socket server)))
|
||
(let loop ((paths paths))
|
||
(match paths
|
||
(()
|
||
(write-int 0 port))
|
||
((head tail ...)
|
||
(write-int 1 port)
|
||
(and (export-path server head port #:sign? sign?)
|
||
(loop tail)))))))
|
||
|
||
|
||
;;;
|
||
;;; Store paths.
|
||
;;;
|
||
|
||
(define %store-prefix
|
||
;; Absolute path to the Nix store.
|
||
(make-parameter (or (and=> (getenv "NIX_STORE_DIR") canonicalize-path)
|
||
%store-directory)))
|
||
|
||
(define (store-path? path)
|
||
"Return #t if PATH is a store path."
|
||
;; This is a lightweight check, compared to using a regexp, but this has to
|
||
;; be fast as it's called often in `derivation', for instance.
|
||
;; `isStorePath' in Nix does something similar.
|
||
(string-prefix? (%store-prefix) path))
|
||
|
||
(define (direct-store-path? path)
|
||
"Return #t if PATH is a store path, and not a sub-directory of a store path.
|
||
This predicate is sometimes needed because files *under* a store path are not
|
||
valid inputs."
|
||
(and (store-path? path)
|
||
(let ((len (+ 1 (string-length (%store-prefix)))))
|
||
(not (string-index (substring path len) #\/)))))
|
||
|
||
(define (derivation-path? path)
|
||
"Return #t if PATH is a derivation path."
|
||
(and (store-path? path) (string-suffix? ".drv" path)))
|
||
|
||
(define store-regexp*
|
||
;; The substituter makes repeated calls to 'store-path-hash-part', hence
|
||
;; this optimization.
|
||
(memoize
|
||
(lambda (store)
|
||
"Return a regexp matching a file in STORE."
|
||
(make-regexp (string-append "^" (regexp-quote store)
|
||
"/([0-9a-df-np-sv-z]{32})-([^/]+)$")))))
|
||
|
||
(define (store-path-package-name path)
|
||
"Return the package name part of PATH, a file name in the store."
|
||
(let ((path-rx (store-regexp* (%store-prefix))))
|
||
(and=> (regexp-exec path-rx path)
|
||
(cut match:substring <> 2))))
|
||
|
||
(define (store-path-hash-part path)
|
||
"Return the hash part of PATH as a base32 string, or #f if PATH is not a
|
||
syntactically valid store path."
|
||
(let ((path-rx (store-regexp* (%store-prefix))))
|
||
(and=> (regexp-exec path-rx path)
|
||
(cut match:substring <> 1))))
|
||
|
||
(define (log-file store file)
|
||
"Return the build log file for FILE, or #f if none could be found. FILE
|
||
must be an absolute store file name, or a derivation file name."
|
||
(define state-dir ; XXX: factorize
|
||
(or (getenv "NIX_STATE_DIR") %state-directory))
|
||
|
||
(cond ((derivation-path? file)
|
||
(let* ((base (basename file))
|
||
(log (string-append (dirname state-dir) ; XXX: ditto
|
||
"/log/nix/drvs/"
|
||
(string-take base 2) "/"
|
||
(string-drop base 2) ".bz2")))
|
||
(and (file-exists? log) log)))
|
||
(else
|
||
(match (valid-derivers store file)
|
||
((derivers ...)
|
||
;; Return the first that works.
|
||
(any (cut log-file store <>) derivers))
|
||
(_ #f)))))
|