;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2013-2020, 2024 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2016 Mark H Weaver <mhw@netris.org>
;;; Copyright © 2016 Jan Nieuwenhuizen <janneke@gnu.org>
;;; Copyright © 2017, 2019 Mathieu Othacehe <m.othacehe@gmail.com>
;;; Copyright © 2019, 2020 Tobias Geerinckx-Rice <me@tobias.gr>
;;;
;;; 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 system linux-initrd)
  #:use-module (guix gexp)
  #:use-module (guix utils)
  #:use-module ((guix store)
                #:select (%store-prefix))
  #:use-module ((guix derivations)
                #:select (derivation->output-path))
  #:use-module (guix modules)
  #:use-module (gnu packages compression)
  #:use-module (gnu packages disk)
  #:use-module (gnu packages linux)
  #:use-module (gnu packages file-systems)
  #:use-module (gnu packages guile)
  #:use-module ((gnu packages xorg)
                #:select (console-setup xkeyboard-config))
  #:use-module ((gnu packages make-bootstrap)
                #:select (%guile-static-initrd))
  #:use-module (gnu system file-systems)
  #:use-module (gnu system mapped-devices)
  #:use-module (gnu system keyboard)
  #:use-module (ice-9 match)
  #:use-module (ice-9 regex)
  #:use-module (ice-9 vlist)
  #:use-module (srfi srfi-1)
  #:use-module (srfi srfi-26)
  #:export (expression->initrd
            %base-initrd-modules
            raw-initrd
            file-system-packages
            base-initrd))


;;; Commentary:
;;;
;;; Tools to build initial RAM disks (initrd's) for Linux-Libre, and in
;;; particular initrd's that run Guile.
;;;
;;; Code:


(define* (expression->initrd exp
                             #:key
                             (guile %guile-static-initrd)
                             (gzip gzip)
                             (name "guile-initrd")
                             (system (%current-system)))
  "Return as a file-like object a Linux initrd (a gzipped cpio archive)
containing GUILE and that evaluates EXP, a G-expression, upon booting.  All
the derivations referenced by EXP are automatically copied to the initrd."

  ;; General Linux overview in `Documentation/early-userspace/README' and
  ;; `Documentation/filesystems/ramfs-rootfs-initramfs.txt'.

  (define init
    (program-file "init" exp #:guile guile))

  (define (import-module? module)
    ;; Since we don't use deduplication support in 'populate-store', don't
    ;; import (guix store deduplication) and its dependencies, which includes
    ;; Guile-Gcrypt.  That way we can run tests with '--bootstrap'.
    (and (guix-module-name? module)
         (not (equal? module '(guix store deduplication)))))

  (define builder
    ;; Do not use "guile-zlib" extension here, otherwise it would drag the
    ;; non-static "zlib" package to the initrd closure.  It is not needed
    ;; anyway because the modules are stored uncompressed within the initrd.
    (with-imported-modules (source-module-closure
                            '((gnu build linux-initrd))
                            #:select?