linux-initrd: Factorize cpio archive creation.
* gnu/build/linux-initrd.scm: New file. * gnu-system.am (GNU_SYSTEM_MODULES): Add it. * gnu/system/linux-initrd.scm (expression->initrd): Use (gnu build linux-initrd) and 'write-cpio-archive' instead of the inlined code.
This commit is contained in:
Ludovic Courtès
parent
e2f4b305d0
commit
fbb3555809
@ -283,6 +283,7 @@ GNU_SYSTEM_MODULES = \
|
||||
gnu/build/file-systems.scm \
|
||||
gnu/build/install.scm \
|
||||
gnu/build/linux-boot.scm \
|
||||
gnu/build/linux-initrd.scm \
|
||||
gnu/build/vm.scm
|
||||
|
||||
|
||||
|
||||
70
gnu/build/linux-initrd.scm
Normal file
70
gnu/build/linux-initrd.scm
Normal file
@ -0,0 +1,70 @@
|
||||
;;; 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 (gnu build linux-initrd)
|
||||
#:use-module (ice-9 popen)
|
||||
#:use-module (ice-9 ftw)
|
||||
#:export (write-cpio-archive))
|
||||
|
||||
;;; Commentary:
|
||||
;;;
|
||||
;;; Tools to create Linux initial RAM disks ("initrds"). Initrds are
|
||||
;;; essentially gzipped cpio archives, with a '/init' executable that the
|
||||
;;; kernel runs at boot time.
|
||||
;;;
|
||||
;;; Code:
|
||||
|
||||
(define* (write-cpio-archive output directory
|
||||
#:key
|
||||
(compress? #t)
|
||||
(cpio "cpio") (gzip "gzip"))
|
||||
"Write a cpio archive containing DIRECTORY to file OUTPUT, using CPIO. When
|
||||
COMPRESS? is true, compress it using GZIP. On success, return OUTPUT."
|
||||
(let ((pipe (open-pipe* OPEN_WRITE cpio "-o" "-O" output
|
||||
"-H" "newc" "--null"
|
||||
"--no-absolute-filenames")))
|
||||
(define (print0 file)
|
||||
(format pipe "~a\0" file))
|
||||
|
||||
;; Note: as per `ramfs-rootfs-initramfs.txt', always add directory entries
|
||||
;; before the files that are inside of it: "The Linux kernel cpio
|
||||
;; extractor won't create files in a directory that doesn't exist, so the
|
||||
;; directory entries must go before the files that go in those
|
||||
;; directories."
|
||||
|
||||
;; XXX: Use a deterministic order.
|
||||
(file-system-fold (const #t)
|
||||
(lambda (file stat result) ; leaf
|
||||
(print0 file))
|
||||
(lambda (dir stat result) ; down
|
||||
(unless (string=? dir directory)
|
||||
(print0 dir)))
|
||||
(const #f) ; up
|
||||
(const #f) ; skip
|
||||
(const #f)
|
||||
#f
|
||||
directory)
|
||||
|
||||
(and (zero? (close-pipe pipe))
|
||||
(or (not compress?)
|
||||
(and (zero? (system* gzip "--best" output))
|
||||
(rename-file (string-append output ".gz")
|
||||
output))
|
||||
output))))
|
||||
|
||||
;;; linux-initrd.scm ends here
|
||||
@ -75,9 +75,10 @@ initrd."
|
||||
(mlet* %store-monad ((source (imported-modules modules))
|
||||
(compiled (compiled-modules modules)))
|
||||
(define builder
|
||||
;; TODO: Move most of this code to (gnu build linux-boot).
|
||||
;; TODO: Move most of this code to (gnu build linux-initrd).
|
||||
#~(begin
|
||||
(use-modules (guix build utils)
|
||||
(use-modules (gnu build linux-initrd)
|
||||
(guix build utils)
|
||||
(ice-9 pretty-print)
|
||||
(ice-9 popen)
|
||||
(ice-9 match)
|
||||
@ -87,9 +88,7 @@ initrd."
|
||||
(rnrs bytevectors)
|
||||
((system foreign) #:select (sizeof)))
|
||||
|
||||
(let ((cpio (string-append #$cpio "/bin/cpio"))
|
||||
(gzip (string-append #$gzip "/bin/gzip"))
|
||||
(modules #$source)
|
||||
(let ((modules #$source)
|
||||
(gos #$compiled)
|
||||
(scm-dir (string-append "share/guile/" (effective-version)))
|
||||
(go-dir (format #f ".cache/guile/ccache/~a-~a-~a-~a"
|
||||
@ -162,39 +161,13 @@ initrd."
|
||||
(for-each (cut utime <> 0 0 0 0)
|
||||
(find-files "." ".*"))
|
||||
|
||||
(system* cpio "--version")
|
||||
(let ((pipe (open-pipe* OPEN_WRITE cpio "-o"
|
||||
"-O" (string-append #$output "/initrd")
|
||||
"-H" "newc" "--null")))
|
||||
(define print0
|
||||
(let ((len (string-length "./")))
|
||||
(lambda (file)
|
||||
(format pipe "~a\0" (string-drop file len)))))
|
||||
|
||||
;; Note: as per `ramfs-rootfs-initramfs.txt', always add
|
||||
;; directory entries before the files that are inside of it: "The
|
||||
;; Linux kernel cpio extractor won't create files in a directory
|
||||
;; that doesn't exist, so the directory entries must go before
|
||||
;; the files that go in those directories."
|
||||
(file-system-fold (const #t)
|
||||
(lambda (file stat result) ; leaf
|
||||
(print0 file))
|
||||
(lambda (dir stat result) ; down
|
||||
(unless (string=? dir ".")
|
||||
(print0 dir)))
|
||||
(const #f) ; up
|
||||
(const #f) ; skip
|
||||
(const #f)
|
||||
#f
|
||||
".")
|
||||
|
||||
(and (zero? (close-pipe pipe))
|
||||
(with-directory-excursion #$output
|
||||
(and (zero? (system* gzip "--best" "initrd"))
|
||||
(rename-file "initrd.gz" "initrd")))))))))
|
||||
(write-cpio-archive (string-append #$output "/initrd") "."
|
||||
#:cpio (string-append #$cpio "/bin/cpio")
|
||||
#:gzip (string-append #$gzip "/bin/gzip"))))))
|
||||
|
||||
(gexp->derivation name builder
|
||||
#:modules '((guix build utils)))))
|
||||
#:modules '((guix build utils)
|
||||
(gnu build linux-initrd)))))
|
||||
|
||||
(define (file-system->spec fs)
|
||||
"Return a list corresponding to file-system FS that can be passed to the
|
||||
|
||||
Loading…
Reference in New Issue
Block a user