;; This is an operating system configuration template
;; for a "desktop" setup without full-blown desktop
;; environments.

(use-modules (gnu)
	     (gnu packages)
	     (gnu system nss)
	     (gnu system locale)
	     (gnu services nfs)
	     (ice-9 rdelim)
             (ice-9 format))
(use-service-modules desktop networking ssh base xorg)
(use-package-modules wm certs shells xdisorg)

(define plattfot 
  (user-account
   (name "plattfot")
   (group "users")
   ;; Define a G-Expr to find the path of the zsh binary:
   ;; https://gitlab.com/rain1/guix-wiki/wikis/FAQ#how-do-i-make-my-login-shell-zsh
   (shell #~(string-append #$zsh "/bin/zsh"))
   (supplementary-groups '("wheel" "netdev" "audio" "video"))
   (home-directory "/home/plattfot")))

;; (define keyboard-conf
;;   (call-with-input-file "/etc/config.d/00-keyboard.conf" read-string))

;; Specify a mapped device for the encrypted root partition.
;; The UUID is that returned by 'cryptsetup luksUUID'.
(define mapped-root
  (mapped-device
   (source (uuid "ab43f8be-1a18-4999-836d-71dac382dfb5"))
   (target "root")
   (type luks-device-mapping)))

(define mapped-swap
  (mapped-device
   (source (uuid "9f04f917-efd3-4036-b3f5-24705fee7ffa"))
   (target "swap")
   (type luks-device-mapping)))

;; Partion layout for /dev/sda3
;; under __current/
;; | subvol      | Mountpoint   | Comment            | Shared   |
;; |-------------+--------------+--------------------+----------|
;; | arch-root   | /            | root for Arch      | no       |
;; | guixsd-root | /            | root for GuixSD    | no       |
;; | grub        | /boot/grub   | grub config        | yes      |
;; | guix        | /var/guix    | guix stuff         | yes      |
;; | gnu         | /gnu         | Store etc          | yes      |
;; | home        | /home        | home partition     | yes      |

(define btrfs-common-options
  '("defaults" "discard" "compress=lzo" "space_cache" "autodefrag"))

(define (btrfs-mount-options subvol)
  "Return the btrfs mount options I use.
Where SUBVOL is the subvolume to mount"
  (string-join (cons (format #f "subvol=~a" subvol) btrfs-common-options) ","))

(define fs-root
  (file-system
   (mount-point "/")
   (type "btrfs")
   (device (file-system-label "root"))
   (options (btrfs-mount-options "__current/guixsd-root"))
   (needed-for-boot? #t)
   (dependencies (list mapped-root))))

(define fs-grub
  (file-system
   (mount-point "/boot/grub")
   (type "btrfs")
   (device (file-system-label "root"))
   (options (btrfs-mount-options "__current/grub"))
   (needed-for-boot? #t)
   (dependencies (list fs-root))))

(define fs-gnu
  (file-system
   (mount-point "/gnu")
   (type "btrfs")
   (device (file-system-label "root"))
   (options (btrfs-mount-options "__current/gnu"))
   (needed-for-boot? #t)
   (dependencies (list fs-root))))

(define fs-guix
  (file-system
   (mount-point "/var/guix")
   (type "btrfs")
   (device (file-system-label "root"))
   (options (btrfs-mount-options "__current/guix"))
   (needed-for-boot? #t)
   (dependencies (list fs-root))))

(define fs-home
  (file-system
   (mount-point "/home")
   (type "btrfs")
   (device (file-system-label "root"))
   (options (btrfs-mount-options "__current/home"))
   (needed-for-boot? #t)
   (dependencies (list fs-root))))

(define fs-valhalla
  (file-system
   (device "fafner:/srv/nfs4/Valhalla")
   (mount-point "/media/Valhalla")
   (type "nfs4")
   (mount? #f)
   (check? #f)))

(define menu-arch
  (menu-entry
   (label "Arch Linux")
   (linux "/boot/vmlinux")
   (linux-arguments
    '("luks.uuid=ab43f8be-1a18-4999-836d-71dac382dfb5"
      "luks.name=ab43f8be-1a18-4999-836d-71dac382dfb5=root"
      "luks.key=ab43f8be-1a18-4999-836d-71dac382dfb5=/boot/rootkey.bin"
      "luks.options=ab43f8be-1a18-4999-836d-71dac382dfb5=discard,luks"
      "luks.uuid=9f04f917-efd3-4036-b3f5-24705fee7ffa"
      "luks.name=9f04f917-efd3-4036-b3f5-24705fee7ffa=swap"
      "luks.key=9f04f917-efd3-4036-b3f5-24705fee7ffa=/boot/swapkey.bin"
      "luks.options=9f04f917-efd3-4036-b3f5-24705fee7ffa=swap,discard,luks"
      "root=LABEL=root"
      "resume=/dev/mapper/swap"
      "rootflags=compress=lzo,subvol=__current/arch-root"))
   (initrd "/boot/initramfs-linux.img")))

(operating-system
 (host-name "loke")
 (timezone "Canada/Pacific")
 (locale "en_US.utf8")
 (locale-definitions 
  (list 
   (locale-definition (name "en_US.utf8") (source "en_US") (charset "UTF-8"))
   (locale-definition (name "sv_SE.utf8") (source "sv_SE") (charset "UTF-8"))))
 ;; Assuming /dev/sda is the target hard disk, and "root"
 ;; is the label of the target root file system.
 (bootloader 
  (grub-configuration (target "/dev/sda")
		      ;; Need to mount __current/arch-root
		      ;; (menu-entries '(menu-arch))
		      ))
 ;; Kernel arguments
 (kernel-arguments '("rootflags=compress=lzo,subvol=__current/guixsd-root"))
 (mapped-devices (list mapped-root mapped-swap))
 (file-systems 
  (cons*
   fs-home
   fs-grub
   fs-gnu
   fs-guix
   fs-root
   %base-file-systems))
 (swap-devices '("/dev/mapper/swap"))
 (users (cons plattfot %base-user-accounts))

 ;; Add a bunch of window managers; we can choose one at
 ;; the log-in screen with F1.
 (packages (cons* i3-wm i3status rofi ;window managers
		  zsh
		  nss-certs            ;for HTTPS access
		  %base-packages))

 ;; Use the "desktop" services, which include the X11
 ;; log-in service, networking with Wicd, and more.
 (services
  %desktop-services
           ;; (cons* ;; (service openssh-service-type
	   ;;        ;;          (openssh-configuration
	   ;;        ;;           (port-number 6060)
           ;;        ;;           (password-authentication? #f)))
	   ;;        ;; (extra-special-file "/bin/env" (file-append coreutils "/bin/env"))
	   ;;        %desktop-services
	   ;;        ;; (modify-services %desktop-services
	   ;;        ;;	   (slim-service-type 
	   ;;        ;;    config => (slim-configuration
	   ;;        ;;       (inherit config)
	   ;;        ;;     (startx (xorg-start-command
	   ;;        ;;	#:configuration-file
	   ;;        ;;(xorg-configuration-file
	   ;;        ;;#:extra-config
	   ;;        ;;(list keyboard-conf)))))))
	   ;;        )
           )

 ;; Allow resolution of '.local' host names with mDNS.
 (name-service-switch %mdns-host-lookup-nss))