;;; GNU Guix --- Functional package management for GNU
;;; Copyright © 2020-2023 Ludovic Courtès <ludo@gnu.org>
;;; Copyright © 2020, 2023 Janneke Nieuwenhuizen <janneke@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 system hurd)
  #:use-module (guix gexp)
  #:use-module (guix profiles)
  #:use-module (guix utils)
  #:use-module (gnu bootloader)
  #:use-module (gnu bootloader grub)
  #:use-module (gnu packages admin)
  #:use-module (gnu packages base)
  #:use-module (gnu packages bash)
  #:use-module (gnu packages certs)
  #:use-module (gnu packages compression)
  #:use-module (gnu packages cross-base)
  #:use-module (gnu packages file)
  #:use-module (gnu packages gawk)
  #:use-module (gnu packages guile)
  #:use-module (gnu packages guile-xyz)
  #:use-module (gnu packages hurd)
  #:use-module (gnu packages less)
  #:use-module (gnu packages linux)
  #:use-module (gnu packages texinfo)
  #:use-module (gnu services)
  #:use-module (gnu services base)
  #:use-module (gnu services hurd)
  #:use-module (gnu services shepherd)
  #:use-module (gnu system)
  #:use-module (gnu system setuid)
  #:use-module (gnu system shadow)
  #:use-module (gnu system vm)
  #:export (%base-packages/hurd
            %base-services/hurd
            %hurd-default-operating-system
            %hurd-default-operating-system-kernel
            %setuid-programs/hurd))

;;; Commentary:
;;;
;;; This module provides system-specifics for the GNU/Hurd operating system
;;; and virtual machine.
;;;
;;; Code:

(define %hurd-default-operating-system-kernel
  (if (system-hurd?)
      gnumach
      ;; A cross-built GNUmach does not work
      (with-parameters ((%current-system "i686-linux")
                        (%current-target-system #f))
        gnumach)))

(define %base-packages/hurd
  ;; Note: the Shepherd comes before the Hurd, not just because its duty is to
  ;; shepherd the herd, but also because we want its 'halt' and 'reboot'
  ;; commands to take precedence.
  (list shepherd-0.10 hurd netdde bash coreutils file findutils grep sed
        diffutils patch gawk tar gzip bzip2 xz lzip
        guile-3.0-latest guile-colorized guile-readline
        net-base nss-certs inetutils less procps shadow sudo which
        info-reader))

(define %base-services/hurd
  (append (list (service hurd-console-service-type
                         (hurd-console-configuration (hurd hurd)))
                (service static-networking-service-type
                         (list %loopback-static-networking

                               ;; QEMU user-mode networking.  To get "eth0", you need
                               ;; QEMU to emulate a device for which Mach has an
                               ;; in-kernel driver, for instance with:
                               ;; --device rtl8139,netdev=net0 --netdev user,id=net0
                               %qemu-static-networking))
                (service guix-service-type
                         (guix-configuration
                          (extra-options '("--disable-chroot"
                                           "--disable-deduplication"))))
                (service special-files-service-type
                         `(("/bin/sh" ,(file-append bash "/bin/sh"))
                           ("/usr/bin/env" ,(file-append coreutils
                                                         "/bin/env"))))
                (service syslog-service-type))
          (map (lambda (n)
                 (service hurd-getty-service-type
                          (hurd-getty-configuration
                           (tty (string-append "tty" (number->string n))))))
               (iota 6 1))))

(define %setuid-programs/hurd
  ;; Default set of setuid-root programs.
  (map file-like->setuid-program
       (list (file-append shadow "/bin/passwd")
             (file-append shadow "/bin/sg")
             (file-append shadow "/bin/su")
             (file-append shadow "/bin/newgrp")
             (file-append shadow "/bin/newuidmap")
             (file-append shadow "/bin/newgidmap")
             (file-append sudo "/bin/sudo")
             (file-append sudo "/bin/sudoedit"))))

(define %hurd-default-operating-system
  (operating-system
    (kernel %hurd-default-operating-system-kernel)
    (kernel-arguments '())
    (hurd hurd)
    (bootloader (bootloader-configuration (bootloader grub-minimal-bootloader)))
    (initrd #f)
    (initrd-modules '())
    (firmware '())
    (host-name "guixygnu")
    (file-systems '())
    (packages %base-packages/hurd)
    (timezone "GNUrope")
    (locale-libcs (list glibc/hurd))
    (name-service-switch #f)
    (essential-services (hurd-default-essential-services this-operating-system))
    (setuid-programs %setuid-programs/hurd)))