6fd1a79674
* 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.
70 lines
2.4 KiB
Scheme
70 lines
2.4 KiB
Scheme
;;; GNU Guix --- Functional package management for GNU
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;;; Copyright © 2013, 2014 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 build store-copy)
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#:use-module (guix build utils)
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#:use-module (srfi srfi-1)
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#:use-module (ice-9 rdelim)
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#:export (read-reference-graph
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populate-store))
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;;; Commentary:
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;;;
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;;; This module provides the tools to copy store items and their dependencies
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;;; to another store. It relies on the availability of "reference graph"
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;;; files as produced by 'gexp->derivation' et al. with the
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;;; #:references-graphs parameter.
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;;;
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;;; Code:
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(define (read-reference-graph port)
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"Return a list of store paths from the reference graph at PORT.
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The data at PORT is the format produced by #:references-graphs."
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(let loop ((line (read-line port))
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(result '()))
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(cond ((eof-object? line)
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(delete-duplicates result))
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((string-prefix? "/" line)
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(loop (read-line port)
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(cons line result)))
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(else
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(loop (read-line port)
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result)))))
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(define* (populate-store reference-graphs target)
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"Populate the store under directory TARGET with the items specified in
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REFERENCE-GRAPHS, a list of reference-graph files."
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(define store
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(string-append target (%store-directory)))
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(define (things-to-copy)
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;; Return the list of store files to copy to the image.
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(define (graph-from-file file)
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(call-with-input-file file read-reference-graph))
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(delete-duplicates (append-map graph-from-file reference-graphs)))
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(mkdir-p store)
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(chmod store #o1775)
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(for-each (lambda (thing)
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(copy-recursively thing
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(string-append target thing)))
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(things-to-copy)))
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;;; store-copy.scm ends here
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