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525 lines
17 KiB
Scheme
525 lines
17 KiB
Scheme
;;; Guix --- Nix package management from Guile. -*- coding: utf-8 -*-
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;;; Copyright (C) 2012 Ludovic Courtès <ludo@gnu.org>
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;;;
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;;; This file is part of Guix.
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;;;
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;;; 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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;;; 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 Guix. If not, see <http://www.gnu.org/licenses/>.
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(define-module (guix)
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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-26)
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#:use-module (ice-9 match)
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#:use-module (ice-9 rdelim)
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#:export (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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open-connection
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set-build-options
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add-text-to-store
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add-to-store))
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(define %protocol-version #x109)
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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)
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(query-derivation-outputs 22)
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(query-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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(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 %nix-state-dir "/nix/var/nix")
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(define %default-socket-path
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(string-append %nix-state-dir "/daemon-socket/socket"))
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;; serialize.cc
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(define (write-int n p)
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(let ((b (make-bytevector 8 0)))
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(bytevector-u32-set! b 0 n (endianness little))
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(put-bytevector p b)))
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(define (read-int p)
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(let ((b (get-bytevector-n p 8)))
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(bytevector-u32-ref b 0 (endianness little))))
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(define (write-long-long n p)
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(let ((b (make-bytevector 8 0)))
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(bytevector-u64-set! b 0 n (endianness little))
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(put-bytevector p b)))
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(define write-padding
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(let ((zero (make-bytevector 8 0)))
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(lambda (n p)
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(let ((m (modulo n 8)))
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(or (zero? m)
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(put-bytevector p zero 0 (- 8 m)))))))
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(define (write-string s p)
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(let ((b (string->utf8 s)))
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(write-int (bytevector-length b) p)
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(put-bytevector p b)
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(write-padding (bytevector-length b) p)))
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(define (read-string p)
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(let* ((len (read-int p))
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(m (modulo len 8))
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(bv (get-bytevector-n p len))
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(str (utf8->string bv)))
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(or (zero? m)
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(get-bytevector-n p (- 8 m)))
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str))
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(define (write-string-list l p)
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(write-int (length l) p)
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(for-each (cut write-string <> p) l))
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(define (read-store-path p)
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(read-string p)) ; TODO: assert path
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(define (write-contents file p)
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"Write the contents of FILE to output port P."
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(define (dump in size)
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(define buf-size 65536)
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(define buf (make-bytevector buf-size))
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(let loop ((left size))
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(if (<= left 0)
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0
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(let ((read (get-bytevector-n! in buf 0 buf-size)))
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(if (eof-object? read)
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left
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(begin
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(put-bytevector p buf 0 read)
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(loop (- left read))))))))
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(let ((size (stat:size (lstat file))))
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(write-string "contents" p)
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(write-long-long size p)
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(call-with-input-file file
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(lambda (p)
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(dump p size)))
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(write-padding size p)))
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(define (write-file f p)
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(define %archive-version-1 "nix-archive-1")
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(let ((s (lstat f)))
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(write-string %archive-version-1 p)
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(write-string "(" p)
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(case (stat:type s)
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((regular)
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(write-string "type" p)
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(write-string "regular" p)
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(if (not (zero? (logand (stat:mode s) #o100)))
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(begin
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(write-string "executable" p)
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(write-string "" p)))
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(write-contents f p)
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(write-string ")" p))
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((directory)
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(write-string "type" p)
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(write-string "directory" p)
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(error "ENOSYS"))
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(else
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(error "ENOSYS")))))
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(define-syntax write-arg
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(syntax-rules (integer boolean file string string-list)
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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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(define-syntax read-arg
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(syntax-rules (integer boolean string store-path)
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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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;; 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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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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(define* (open-connection #:optional (file %default-socket-path))
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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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(connect s a)
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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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(let ((s (%make-nix-server s
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(protocol-major v)
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(protocol-minor v))))
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(process-stderr s)
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s))))))))
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(define (process-stderr server)
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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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(read-string p))
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((= k %stderr-read)
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(let ((len (read-int p)))
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(read-string p) ; FIXME: what to do?
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))
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((= k %stderr-next)
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(let ((s (read-string p)))
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(display s (current-error-port))
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s))
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((= k %stderr-error)
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(let ((error (read-string p))
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(status (if (>= (nix-server-minor-version server) 8)
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(read-int p)
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1)))
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(format (current-error-port) "error: ~a (status: ~a)~%"
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error status)
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error))
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((= k %stderr-last)
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#t)
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(else
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(error "invalid standard error code" k)))))
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(define* (set-build-options server
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#:key keep-failed? keep-going? try-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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;; 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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((_ option ...)
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(for-each (lambda (i)
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(cond ((boolean? i)
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(write-int (if i 1 0) socket))
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((integer? i)
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(write-int i socket))
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(else
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(error "invalid build option"
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i))))
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(list option ...))))))
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(send (operation-id set-options)
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keep-failed? keep-going? try-fallback? verbosity
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max-build-jobs max-silent-time)
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(if (>= (nix-server-minor-version server) 2)
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(send use-build-hook?))
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(if (>= (nix-server-minor-version server) 4)
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(send build-verbosity log-type print-build-trace))
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(process-stderr server)))
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(define-syntax define-operation
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(syntax-rules ()
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((_ (name (type arg) ...) docstring return)
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(define (name 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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(process-stderr server)
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(read-arg return s))))))
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(define-operation (add-text-to-store (string name) (string text)
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(string-list references))
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"Add TEXT under file NAME in the store."
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store-path)
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(define-operation (add-to-store (string basename)
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(integer algo)
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(boolean sha256-and-recursive?)
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(boolean recursive?)
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(file file-name))
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"Add the contents of FILE-NAME under BASENAME to the store."
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store-path)
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(define-operation (build-derivations (string-list derivations))
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"Build DERIVATIONS; return #t on success."
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boolean)
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;; derivations
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(define-record-type <derivation>
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(make-derivation outputs inputs sources system builder args env-vars)
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derivation?
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(outputs derivation-outputs) ; list of name/<derivation-output> pairs
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(inputs derivation-inputs) ; list of <derivation-input>
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(sources derivation-sources) ; list of store paths
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(system derivation-system) ; string
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(builder derivation-builder) ; store path
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(args derivation-builder-arguments) ; list of strings
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(env-vars derivation-builder-environment-vars)) ; list of name/value pairs
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(define-record-type <derivation-output>
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(make-derivation-output path hash-algo hash)
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derivation-output?
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(path derivation-output-path) ; store path
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(hash-algo derivation-output-hash-algo) ; symbol | #f
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(hash derivation-output-hash)) ; symbol | #f
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(define-record-type <derivation-input>
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(make-derivation-input path sub-derivations)
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derivation-input?
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(path derivation-input-path) ; store path
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(sub-derivations derivation-input-sub-derivations)) ; list of strings
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(define (fixed-output-derivation? drv)
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"Return #t if DRV is a fixed-output derivation, such as the result of a
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download with a fixed hash (aka. `fetchurl')."
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(match drv
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(($ <derivation>
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(($ <derivation-output> _ (? symbol?) (? string?))))
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#t)
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(_ #f)))
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(define (read-derivation drv-port)
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"Read the derivation from DRV-PORT and return the corresponding
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<derivation> object."
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(define comma (string->symbol ","))
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(define (ununquote x)
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(match x
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(('unquote x) (ununquote x))
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((x ...) (map ununquote x))
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(_ x)))
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(define (outputs->alist x)
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(fold-right (lambda (output result)
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(match output
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((name path "" "")
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(alist-cons name
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(make-derivation-output path #f #f)
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result))
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((name path hash-algo hash)
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;; fixed-output
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(let ((algo (string->symbol hash-algo)))
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(alist-cons name
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(make-derivation-output path algo hash)
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result)))))
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'()
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x))
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(define (make-input-drvs x)
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(fold-right (lambda (input result)
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(match input
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((path (sub-drvs ...))
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(cons (make-derivation-input path sub-drvs)
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result))))
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'()
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x))
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(let loop ((exp (read drv-port))
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(result '()))
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(match exp
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((? eof-object?)
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(let ((result (reverse result)))
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(match result
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(('Derive ((outputs ...) (input-drvs ...)
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(input-srcs ...)
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(? string? system)
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(? string? builder)
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((? string? args) ...)
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((var value) ...)))
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(make-derivation (outputs->alist outputs)
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(make-input-drvs input-drvs)
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input-srcs
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system builder args
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(fold-right alist-cons '() var value)))
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(_
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(error "failed to parse derivation" drv-port result)))))
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((? (cut eq? <> comma))
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(loop (read drv-port) result))
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(_
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(loop (read drv-port)
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(cons (ununquote exp) result))))))
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(define (write-derivation drv port)
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"Write the ATerm-like serialization of DRV to PORT."
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(define (list->string lst)
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(string-append "[" (string-join lst ",") "]"))
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(define (write-list lst)
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(display (list->string lst) port))
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(match drv
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(($ <derivation> outputs inputs sources
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system builder args env-vars)
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(display "Derive(" port)
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(write-list (map (match-lambda
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((name . ($ <derivation-output> path hash-algo hash))
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(format #f "(~s,~s,~s,~s)"
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name path (or hash-algo "")
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(or hash ""))))
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outputs))
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(display "," port)
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(write-list (map (match-lambda
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(($ <derivation-input> path sub-drvs)
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(format #f "(~s,~a)" path
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(list->string (map object->string sub-drvs)))))
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inputs))
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(display "," port)
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(write-list sources)
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(format port ",~s,~s," system builder)
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(write-list (map object->string args))
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(display "," port)
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(write-list (map (match-lambda
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((name . value)
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(format #f "(~s,~s)" name value)))
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env-vars))
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(display ")" port))))
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(define (sha256 bv)
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"Return the SHA256 of BV as an string of hexadecimal digits."
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;; XXX: Poor programmer's implementation that uses Coreutils.
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(let ((in (pipe))
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(out (pipe))
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(pid (primitive-fork)))
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(if (= 0 pid)
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(begin ; child
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(close (cdr in))
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(close (car out))
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(close 0)
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(close 1)
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(dup2 (fileno (car in)) 0)
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(dup2 (fileno (cdr out)) 1)
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(execlp "sha256sum" "sha256sum"))
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(begin ; parent
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(close (car in))
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(close (cdr out))
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(put-bytevector (cdr in) bv)
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(close (cdr in)) ; EOF
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(let ((line (car (string-tokenize (read-line (car out))))))
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(close (car out))
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(and (and=> (status:exit-val (cdr (waitpid pid)))
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zero?)
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line))))))
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(define (derivation-hash drv) ; `hashDerivationModulo' in derivations.cc
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(match drv
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(($ <derivation> ((_ . ($ <derivation-output> path
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(? symbol? hash-algo) (? string? hash)))))
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;; A fixed-output derivation.
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(sha256
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(string->utf8
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(string-append "fixed:out:" hash-algo ":" hash ":" path))))
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(($ <derivation> outputs inputs sources
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system builder args env-vars)
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;; A regular derivation: replace that path of each input with that
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;; inputs hash; return the hash of serialization of the resulting
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;; derivation.
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(let* ((inputs (map (match-lambda
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(($ <derivation-input> path sub-drvs)
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(let ((hash (call-with-input-file path
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(compose derivation-hash
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read-derivation))))
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(make-derivation-input hash sub-drvs))))
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inputs))
|
||
(drv (make-derivation outputs inputs sources
|
||
system builder args env-vars)))
|
||
(sha256
|
||
(string->utf8 (call-with-output-string
|
||
(cut write-derivation drv <>))))))))
|
||
|
||
(define (instantiate server derivation)
|
||
#f
|
||
)
|