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;; This is an operating system configuration file for a fairly minimal
;; "desktop" setup with i3 where the /home partition partition is
;; encrypted with LUKS.
;;
;; https://guix.gnu.org/manual/en/html_node/operating_002dsystem-Reference.html
(define-module (tw system btl)
#:use-module (gnu)
#:use-module (gnu bootloader grub)
#:use-module (gnu packages linux)
#:use-module (gnu packages shells)
#:use-module (gnu services admin)
#:use-module (gnu services desktop)
#:use-module (gnu services pm)
#:use-module (gnu services syncthing)
#:use-module (gnu system locale)
#:use-module (gnu system nss)
#:use-module (guix gexp)
#:use-module (guix packages)
#:use-module ((nongnu packages linux)
#:prefix nongnu:) ; don't interfere with (gnu packages linux)
#:use-module ((nongnu system linux-initrd)
#:prefix nongnu:)
#:use-module ((nonguix licenses)
#:prefix nongnu:)
#:use-module (tw channels)
#:use-module (tw packages firmware)
#:use-module (tw services secrets)
#:use-module (tw system))
(define efi-system-partition ; /dev/nvme1n1p1
(uuid "D722-BEEE" 'fat))
(define root-partition ; /dev/nvme1n1p2
(uuid "0d47bc5c-de3c-47bb-b108-19b4a57bd2bc" 'btrfs))
(define data-partition ; /dev/nvme0n1p1
(uuid "cd4b7af3-f5ce-44a0-a986-3271078fb1d6" 'btrfs))
(define-public %btl-system
(operating-system
(host-name "btl.twilken.net")
(timezone "Europe/Paris")
(locale "en_GB.utf8")
(locale-definitions
(list (locale-definition (name "en_GB.utf8") (source "en_GB"))
(locale-definition (name "en_US.utf8") (source "en_US"))
(locale-definition (name "fr_FR.utf8") (source "fr_FR"))))
;; Allow resolution of '.local' host names with mDNS.
(name-service-switch %mdns-host-lookup-nss)
;; Choose UK English X11 keyboard layout.
(keyboard-layout %british-keyboard)
;; Use the UEFI variant of GRUB with the EFI System
;; Partition mounted on /boot/efi.
(bootloader
(bootloader-configuration
(bootloader grub-efi-bootloader)
(targets '("/boot/efi"))
;; Note: keyboard-layout is ignored by non-grub bootloaders.
(keyboard-layout keyboard-layout)))
;; Use non-free kernel to load non-free firmware (e.g. for wifi).
;; Enable MT7921 module for Mediatek MT7922 (AMD RZ616) WiFi card.
;; The MT7921E module is for the card connected via PCIe, which it is
;; (it's in an M.2 slot). Alternatives are S (SDIO) and U (USB).
(kernel (nongnu:corrupt-linux linux-libre #:configs '("CONFIG_MT7921E=m")))
(kernel-arguments
;; Make printing work by blacklisting the broken "usblp" kernel module.
(cons* "modprobe.blacklist=usblp" %default-kernel-arguments))
;; (kernel-loadable-modules (list ddcci-driver-linux)) ; TODO: disabled because the package fails to build
(initrd nongnu:microcode-initrd)
(firmware (cons* nongnu:amdgpu-firmware mt7922-firmware %base-firmware))
(file-systems
(cons* (file-system
(device root-partition)
(mount-point "/")
(flags '(no-atime))
(options (alist->file-system-options
'("ssd" ("compress" . "zstd"))))
(type "btrfs"))
(file-system
(device efi-system-partition)
(mount-point "/boot/efi")
(flags '(no-atime))
(type "vfat"))
;; Put /home in a subvolume for better accounting/snapshotting potential.
(file-system
(device data-partition)
(mount-point "/home")
(flags '(no-atime))
(options (alist->file-system-options
'("ssd" ("compress" . "zstd"))))
(type "btrfs"))
%base-file-systems))
;; Members of the wheel group are allowed to use sudo.
(users (cons* (user-account
(name "timo")
(comment "Timo Wilken")
(group "users")
(supplementary-groups
'("wheel" "audio" "video" "docker" "adbusers"))
(shell (file-append zsh "/bin/zsh")))
%base-user-accounts))
(sudoers-file
(plain-file "sudoers"
(string-append
;; We need to preserve $TERMINFO so that programs under sudo can
;; find kitty's terminfo files. This is possibly unsafe; sudo
;; explicitly deletes this variable by default.
"Defaults env_keep += \"TERMINFO\"\n"
(plain-file-content %sudoers-specification)
;; In addition to the default rules, allow admins to power off
;; the computer. They'll have to use the system binaries, not
;; those from their user profile, as /etc/sudoers requires
;; absolute paths to commands.
"%wheel ALL=(ALL) NOPASSWD: "
"/run/current-system/profile/sbin/halt, "
"/run/current-system/profile/sbin/reboot, "
"/run/current-system/profile/sbin/shutdown\n")))
;; Use the "desktop" services, which include the X11
;; log-in service, networking with NetworkManager, and more.
;; See info '(guix)Services' for useful services.
(services
(cons*
(service syncthing-service-type
(syncthing-configuration
(user "timo")))
(service bluetooth-service-type)
(service unattended-upgrade-service-type
(unattended-upgrade-configuration
(schedule "0 21 * * *") ; every night at 21:00, when the PC is turned on
(maximum-duration (* 40 60)) ; 40 minutes to allow for slow downloads
(channels #~(@ (tw channels) %system-channels))
(operating-system-expression
#~(@ (tw system btl) %btl-system))
(services-to-restart
;; Anything that won't cause disruption when restarting.
'(syncthing-timo earlyoom wireguard-wg0 mcron))))
(modify-services (enduser-system-services
#:host-name host-name
#:cores 24
#:wireless-interface "wlp15s0"
#:backlight-device "amdgpu_bl0")
(delete thermald-service-type))))))
%btl-system
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