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vm: Move store copy handling to (guix build store-copy).

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* gnu/build/vm.scm (read-reference-graph, populate-store): Move to...
* guix/build/store-copy.scm: ... here.  New file.
* Makefile.am (MODULES): Add it.
* gnu/system/vm.scm (expression->derivation-in-linux-vm): Adjust default
  #:modules values accordingly.
* tests/gexp.scm ("gexp->derivation, store copy"): New test.
This commit is contained in:
Ludovic Courtès 2014-09-04 23:05:12 +02:00
parent b21a1c5a18
commit 6fd1a79674
5 changed files with 111 additions and 37 deletions
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1
Makefile.am
View file

@ -64,6 +64,7 @@ MODULES = \
guix/build/gnu-dist.scm \
guix/build/perl-build-system.scm \
guix/build/python-build-system.scm \
guix/build/store-copy.scm \
guix/build/utils.scm \
guix/build/union.scm \
guix/build/pull.scm \

37
gnu/build/vm.scm
View file

@ -18,12 +18,11 @@
(define-module (gnu build vm)
#:use-module (guix build utils)
#:use-module (guix build store-copy)
#:use-module (gnu build linux-boot)
#:use-module (gnu build install)
#:use-module (ice-9 match)
#:use-module (ice-9 regex)
#:use-module (ice-9 rdelim)
#:use-module (srfi srfi-1)
#:use-module (srfi srfi-26)
#:export (qemu-command
load-in-linux-vm
@ -111,20 +110,6 @@ (define image-file
(mkdir output)
(copy-recursively "xchg" output))))
(define (read-reference-graph port)
"Return a list of store paths from the reference graph at PORT.
The data at PORT is the format produced by #:references-graphs."
(let loop ((line (read-line port))
(result '()))
(cond ((eof-object? line)
(delete-duplicates result))
((string-prefix? "/" line)
(loop (read-line port)
(cons line result)))
(else
(loop (read-line port)
result)))))
(define* (initialize-partition-table device partition-size
#:key
(label-type "msdos")
@ -140,26 +125,6 @@ (define* (initialize-partition-table device partition-size
(format #f "~aB" partition-size)))
(error "failed to create partition table")))
(define* (populate-store reference-graphs target)
"Populate the store under directory TARGET with the items specified in
REFERENCE-GRAPHS, a list of reference-graph files."
(define store
(string-append target (%store-directory)))
(define (things-to-copy)
;; Return the list of store files to copy to the image.
(define (graph-from-file file)
(call-with-input-file file read-reference-graph))
(delete-duplicates (append-map graph-from-file reference-graphs)))
(mkdir-p store)
(chmod store #o1775)
(for-each (lambda (thing)
(copy-recursively thing
(string-append target thing)))
(things-to-copy)))
(define MS_BIND 4096) ; <sys/mounts.h> again!
(define* (format-partition partition type

3
gnu/system/vm.scm
View file

@ -116,7 +116,8 @@ (define* (expression->derivation-in-linux-vm name exp
(gnu build install)
(gnu build linux-boot)
(gnu build file-systems)
(guix build utils)))
(guix build utils)
(guix build store-copy)))
(guile-for-build
(%guile-for-build))

69
guix/build/store-copy.scm Normal file
View file

@ -0,0 +1,69 @@
;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013, 2014 Ludovic Courtès <ludo@gnu.org>
;;;
;;; This file is part of GNU Guix.
;;;
;;; GNU Guix is free software; you can redistribute it and/or modify it
;;; under the terms of the GNU General Public License as published by
;;; the Free Software Foundation; either version 3 of the License, or (at
;;; your option) any later version.
;;;
;;; GNU Guix is distributed in the hope that it will be useful, but
;;; WITHOUT ANY WARRANTY; without even the implied warranty of
;;; MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
;;; GNU General Public License for more details.
;;;
;;; You should have received a copy of the GNU General Public License
;;; along with GNU Guix. If not, see <http://www.gnu.org/licenses/>.
(define-module (guix build store-copy)
#:use-module (guix build utils)
#:use-module (srfi srfi-1)
#:use-module (ice-9 rdelim)
#:export (read-reference-graph
populate-store))
;;; Commentary:
;;;
;;; This module provides the tools to copy store items and their dependencies
;;; to another store. It relies on the availability of "reference graph"
;;; files as produced by 'gexp->derivation' et al. with the
;;; #:references-graphs parameter.
;;;
;;; Code:
(define (read-reference-graph port)
"Return a list of store paths from the reference graph at PORT.
The data at PORT is the format produced by #:references-graphs."
(let loop ((line (read-line port))
(result '()))
(cond ((eof-object? line)
(delete-duplicates result))
((string-prefix? "/" line)
(loop (read-line port)
(cons line result)))
(else
(loop (read-line port)
result)))))
(define* (populate-store reference-graphs target)
"Populate the store under directory TARGET with the items specified in
REFERENCE-GRAPHS, a list of reference-graph files."
(define store
(string-append target (%store-directory)))
(define (things-to-copy)
;; Return the list of store files to copy to the image.
(define (graph-from-file file)
(call-with-input-file file read-reference-graph))
(delete-duplicates (append-map graph-from-file reference-graphs)))
(mkdir-p store)
(chmod store #o1775)
(for-each (lambda (thing)
(copy-recursively thing
(string-append target thing)))
(things-to-copy)))
;;; store-copy.scm ends here

38
tests/gexp.scm
View file

@ -324,6 +324,44 @@ (define (match-input thing)
(return (string=? (derivation-file-name drv)
(derivation-file-name xdrv)))))
(test-assertm "gexp->derivation, store copy"
(let ((build-one #~(call-with-output-file #$output
(lambda (port)
(display "This is the one." port))))
(build-two (lambda (one)
#~(begin
(mkdir #$output)
(symlink #$one (string-append #$output "/one"))
(call-with-output-file (string-append #$output "/two")
(lambda (port)
(display "This is the second one." port))))))
(build-drv (lambda (two)
#~(begin
(use-modules (guix build store-copy))
(mkdir #$output)
'#$two ;make it an input
(populate-store '("graph") #$output)))))
(mlet* %store-monad ((one (gexp->derivation "one" build-one))
(two (gexp->derivation "two" (build-two one)))
(dir -> (derivation->output-path two))
(drv (gexp->derivation "store-copy" (build-drv two)
#:references-graphs
`(("graph" . ,dir))
#:modules
'((guix build store-copy)
(guix build utils))))
(ok? (built-derivations (list drv)))
(out -> (derivation->output-path drv)))
(let ((one (derivation->output-path one))
(two (derivation->output-path two)))
(return (and ok?
(file-exists? (string-append out "/" one))
(file-exists? (string-append out "/" two))
(file-exists? (string-append out "/" two "/two"))
(string=? (readlink (string-append out "/" two "/one"))
one)))))))
(define shebang
(string-append "#!" (derivation->output-path (%guile-for-build))
"/bin/guile --no-auto-compile"))