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Author SHA1 Message Date
2ab1c855ec Revert "muffin: test, move to 7.0"
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This reverts commit f67ec5bde6.
2026-04-25 10:50:00 -04:00
f67ec5bde6 muffin: test, move to 7.0
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2026-04-25 02:12:21 -04:00
112b85f3fb update
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2026-04-25 01:45:47 -04:00
86cf624027 Revert "muffin: test, move to 6.18"
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This reverts commit 1df3a303f5.
2026-04-24 14:21:40 -04:00
1df3a303f5 muffin: test, move to 6.18
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2026-04-24 14:08:26 -04:00
07a5276e40 patiodeck: fix disko partition order (fixed-size before 100%) 2026-04-24 01:47:25 -04:00
f3d21f16fb desktop-jovian: unify steam/jovian config across yarn + patiodeck
- modules/desktop-jovian.nix: shared Jovian deck-mode config (unfree
  predicate, jovian.steam, sddm, gamescope override, imports
  desktop-steam-update.nix)
- home/progs/steam-shortcuts.nix: declarative non-Steam shortcuts
  (Prism Launcher); add new entries here for all Jovian hosts
- hosts/yarn/default.nix: reduced to host-specific config only
- hosts/patiodeck/default.nix: same
2026-04-23 22:42:25 -04:00
5b2a1a652a patiodeck: add prism launcher to steam shortcuts 2026-04-23 22:34:58 -04:00
665793668d patiodeck: add steam deck LCD host 2026-04-23 22:34:47 -04:00
12 changed files with 396 additions and 217 deletions

108
flake.lock generated
View File

@@ -109,11 +109,11 @@
"cachyos-kernel": {
"flake": false,
"locked": {
"lastModified": 1776608760,
"narHash": "sha256-ehDv8bF7k/2Kf4b8CCoSm51U/MOoFuLsRXqe5wZ57sE=",
"lastModified": 1776881435,
"narHash": "sha256-j8AobLjMzeKJugseObrVC4O5k7/aZCWoft2sCS3jWYs=",
"owner": "CachyOS",
"repo": "linux-cachyos",
"rev": "7e06e29005853bbaaa3b1c1067f915d6e0db728a",
"rev": "1c61dfd1c3ad7762faa0db8b06c6af6c59cc4340",
"type": "github"
},
"original": {
@@ -125,11 +125,11 @@
"cachyos-kernel-patches": {
"flake": false,
"locked": {
"lastModified": 1776792814,
"narHash": "sha256-39dlIhz9KxUNQFxGpE9SvCviaOWAivdW0XJM8RnPNmg=",
"lastModified": 1777002108,
"narHash": "sha256-PIZCIf6xUTOUqLFbEGH0mSwu2O/YfeAmYlgdAbP4dhs=",
"owner": "CachyOS",
"repo": "kernel-patches",
"rev": "d7d558d0b2e239e27b40bcf1af6fe12e323aa391",
"rev": "46476ae2538db486462aef8a9de37d19030cdaf2",
"type": "github"
},
"original": {
@@ -222,11 +222,11 @@
]
},
"locked": {
"lastModified": 1776967792,
"narHash": "sha256-O3YfkXQz8P2kec6Ani8fmuXvuXRAyl5/qPdt0kDNFWk=",
"lastModified": 1777083982,
"narHash": "sha256-O44P8qcFEv0PYQd+9vFAgCu/e9RclHIAyAmRDJ8qR5s=",
"owner": "nix-community",
"repo": "emacs-overlay",
"rev": "0041dd571ebebe8fa779b940fb13b6d447a48b87",
"rev": "42711d50137a45b8065c3e329946e2d4525235d0",
"type": "github"
},
"original": {
@@ -266,11 +266,11 @@
},
"locked": {
"dir": "pkgs/firefox-addons",
"lastModified": 1776916994,
"narHash": "sha256-FgqUwRZ2bwbE5w1bCUv9MB3gvwqZ4oEyCgZ6z/6jdTY=",
"lastModified": 1777089773,
"narHash": "sha256-ZIlNuebeWTncyl7mcV9VbceSLAaZki+UeXLPQG959xI=",
"owner": "rycee",
"repo": "nur-expressions",
"rev": "a2236006e5c70e2fc06e9acb016b1ac9c0fd5935",
"rev": "402ba229617a12d918c2a887a4c83a9a24f9a36c",
"type": "gitlab"
},
"original": {
@@ -484,11 +484,11 @@
]
},
"locked": {
"lastModified": 1776964438,
"narHash": "sha256-AF0cby9Xuijr5qaFpYKbm1mExV956Hk233bel6QxpFw=",
"lastModified": 1777086106,
"narHash": "sha256-hlNpIN18pw3xo34Lsrp6vAMUPn0aB/zFBqL0QXI1Pmk=",
"owner": "nix-community",
"repo": "home-manager",
"rev": "e09259dd2e147d35ef889784b51e89b0a10ffe15",
"rev": "5826802354a74af18540aef0b01bc1320f82cc17",
"type": "github"
},
"original": {
@@ -631,11 +631,11 @@
]
},
"locked": {
"lastModified": 1776955347,
"narHash": "sha256-VCPA/1RWMZggfXjpMcEMC2QfDrYp6eHgqvsPfDSKGSI=",
"lastModified": 1777066729,
"narHash": "sha256-f+a+ikbq0VS6RQFf+A6EuVnsWYn2RR3ggRJNkzZgMto=",
"owner": "TheTom",
"repo": "llama-cpp-turboquant",
"rev": "67559e580b10e4e47e9a6fd6218873997976886d",
"rev": "11a241d0db78a68e0a5b99fe6f36de6683100f6a",
"type": "github"
},
"original": {
@@ -657,11 +657,11 @@
"treefmt-nix": "treefmt-nix"
},
"locked": {
"lastModified": 1776966087,
"narHash": "sha256-P+39paxTvpYiMv5wqGKte7YbmxJKoihcXssV1IhkSAo=",
"lastModified": 1777093284,
"narHash": "sha256-tBvsFPJy0/2gocc6QGYFXJF44TvJ8PC726NsdTpFJ44=",
"owner": "numtide",
"repo": "llm-agents.nix",
"rev": "547d51c282c15a7c9b86c8388a1adb1695b1df59",
"rev": "6b4673fddbbe1f2656b3fa8d2a32666570aafbfa",
"type": "github"
},
"original": {
@@ -704,11 +704,11 @@
"xwayland-satellite-unstable": "xwayland-satellite-unstable"
},
"locked": {
"lastModified": 1776879043,
"narHash": "sha256-M9RjuowtoqQbFRdQAm2P6GjFwgHjRcnWYcB7ChSjDms=",
"lastModified": 1777068473,
"narHash": "sha256-atEzEdMgJMRPm/yxOiBvOSEcjSUgU20ieXYQeDfxhTo=",
"owner": "sodiboo",
"repo": "niri-flake",
"rev": "535ebbe038039215a5d1c6c0c67f833409a5be96",
"rev": "d543523b5cd4c1f10e41ad8801c49808198b9ca5",
"type": "github"
},
"original": {
@@ -737,11 +737,11 @@
"niri-unstable": {
"flake": false,
"locked": {
"lastModified": 1776853441,
"narHash": "sha256-mSxfoEs7DiDhMCBzprI/1K7UXzMISuGq0b7T06LVJXE=",
"lastModified": 1777045529,
"narHash": "sha256-EeAwmrvONsovL2qPwKGXF2xGhbo7MySesY3fW2pNLpM=",
"owner": "YaLTeR",
"repo": "niri",
"rev": "74d2b18603366b98ec9045ecf4a632422f472365",
"rev": "9438f59e2b9d8deb6fcec5922f8aca18162b673c",
"type": "github"
},
"original": {
@@ -761,11 +761,11 @@
]
},
"locked": {
"lastModified": 1776796985,
"narHash": "sha256-cNFg3H09sBZl1v9ds6PDHfLCUTDJbefGMSv+WxFs+9c=",
"lastModified": 1777054238,
"narHash": "sha256-qaqHPZO3oQJiIZgD6sp5HKwvYAVyMtHVJiXVwPSEkx0=",
"owner": "xddxdd",
"repo": "nix-cachyos-kernel",
"rev": "ac5956bbceb022998fc1dd0001322f10ef1e6dda",
"rev": "acb94409639d6d6d64bea140f939ac34938560b1",
"type": "github"
},
"original": {
@@ -846,11 +846,11 @@
"systems": "systems_7"
},
"locked": {
"lastModified": 1776915193,
"narHash": "sha256-bYyOT3OIWIKvDV+pOVd0hdCEG8orf85QX4b21LWUSEs=",
"lastModified": 1777001712,
"narHash": "sha256-9JX9msZU1NvHzjKM24PRorP76Ge8GBy6LAkJKA21mlY=",
"owner": "Infinidoge",
"repo": "nix-minecraft",
"rev": "40c972ce0f45b8c05bf245d5065647b17552312c",
"rev": "394d3bfd943458baf29e4798bc9b256d824a3bb9",
"type": "github"
},
"original": {
@@ -861,11 +861,11 @@
},
"nixos-hardware": {
"locked": {
"lastModified": 1776830795,
"narHash": "sha256-PAfvLwuHc1VOvsLcpk6+HDKgMEibvZjCNvbM1BJOA7o=",
"lastModified": 1776983936,
"narHash": "sha256-ZOQyNqSvJ8UdrrqU1p7vaFcdL53idK+LOM8oRWEWh6o=",
"owner": "NixOS",
"repo": "nixos-hardware",
"rev": "72674a6b5599e844c045ae7449ba91f803d44ebc",
"rev": "2096f3f411ce46e88a79ae4eafcfc9df8ed41c61",
"type": "github"
},
"original": {
@@ -877,11 +877,11 @@
},
"nixpkgs": {
"locked": {
"lastModified": 1776548001,
"narHash": "sha256-ZSK0NL4a1BwVbbTBoSnWgbJy9HeZFXLYQizjb2DPF24=",
"lastModified": 1776877367,
"narHash": "sha256-EHq1/OX139R1RvBzOJ0aMRT3xnWyqtHBRUBuO1gFzjI=",
"owner": "NixOS",
"repo": "nixpkgs",
"rev": "b12141ef619e0a9c1c84dc8c684040326f27cdcc",
"rev": "0726a0ecb6d4e08f6adced58726b95db924cef57",
"type": "github"
},
"original": {
@@ -991,11 +991,11 @@
"noctalia-qs": "noctalia-qs"
},
"locked": {
"lastModified": 1776888984,
"narHash": "sha256-Up2F/eoMuPUsZnPVYdH5TMHe1TBP2Ue1QuWd0vWZoxY=",
"lastModified": 1777079905,
"narHash": "sha256-TvYEXwkZnRFQRuFyyqTNSfPnU2tMdhtiBOXSk2AWLJA=",
"owner": "noctalia-dev",
"repo": "noctalia-shell",
"rev": "2c1808f9f8937fc0b82c54af513f7620fec56d71",
"rev": "a50c92167c8d438000270f7eca36f6eea74f388e",
"type": "github"
},
"original": {
@@ -1133,11 +1133,11 @@
]
},
"locked": {
"lastModified": 1776914043,
"narHash": "sha256-qug5r56yW1qOsjSI99l3Jm15JNT9CvS2otkXNRNtrPI=",
"lastModified": 1777086717,
"narHash": "sha256-vEl3cGHRxEFdVNuP9PbrhAWnmU98aPOLGy9/1JXzSuM=",
"owner": "oxalica",
"repo": "rust-overlay",
"rev": "2d35c4358d7de3a0e606a6e8b27925d981c01cc3",
"rev": "3be56bd430bfd65d3c468a50626c3a601c7dee03",
"type": "github"
},
"original": {
@@ -1190,11 +1190,11 @@
]
},
"locked": {
"lastModified": 1776912132,
"narHash": "sha256-UDR6PtHacMhAQJ8SPNbPROaxbtl2Pgjww0TzipTsTZE=",
"lastModified": 1777000965,
"narHash": "sha256-xcrhVgfI13s1WH4hg5MLL83zAp6/htfF8Pjw4RPiKM8=",
"owner": "nix-community",
"repo": "srvos",
"rev": "e9ff039a72ff2c06271d5002eb431c443abf69fa",
"rev": "7ae6f096b2ffbd25d17da8a4d0fe299a164c4eac",
"type": "github"
},
"original": {
@@ -1356,11 +1356,11 @@
"trackerlist": {
"flake": false,
"locked": {
"lastModified": 1776895782,
"narHash": "sha256-iHdp9lRoV3ejsTC96z7Pns/JvQKWyp+V0fdVcVOv8Xw=",
"lastModified": 1777068584,
"narHash": "sha256-UZr6mQfauhIUo8n3SDYnBWeq11xs5lTAoc9onh2MHBc=",
"owner": "ngosang",
"repo": "trackerslist",
"rev": "e1a89caab7d4c5af3870a49ddc494cda745b236e",
"rev": "747c048c604c8d12b9d20cfccea4800a32382a66",
"type": "github"
},
"original": {
@@ -1524,11 +1524,11 @@
]
},
"locked": {
"lastModified": 1776922304,
"narHash": "sha256-T1r7GWzeqX0C6YauIMN6D0sdr5voDAPMg8jvn59Wm7g=",
"lastModified": 1777084302,
"narHash": "sha256-qHE5XpgtRedzND5xzaqzbSOw4amse0aA4/BaVI4ONcU=",
"owner": "0xc000022070",
"repo": "zen-browser-flake",
"rev": "91cc9ed57a893b2e944de60812511f05fd408ce6",
"rev": "f6bab88f8566ddc13fb5e5500bd6c720b61d5321",
"type": "github"
},
"original": {

View File

@@ -376,6 +376,7 @@
nixosConfigurations = {
mreow = mkDesktopHost "mreow";
yarn = mkDesktopHost "yarn";
patiodeck = mkDesktopHost "patiodeck";
muffin = muffinHost;
};

View File

@@ -0,0 +1,29 @@
# Declarative non-Steam game shortcuts for the Steam library.
# Add entries to the `shortcuts` list to have them appear in Steam's UI.
{
pkgs,
inputs,
lib,
...
}:
{
imports = [
inputs.json2steamshortcut.homeModules.default
];
services.steam-shortcuts = {
enable = true;
overwriteExisting = true;
steamUserId = lib.strings.toInt (
lib.strings.trim (builtins.readFile ../../secrets/home/steam-user-id)
);
shortcuts = [
{
AppName = "Prism Launcher";
Exe = "${pkgs.prismlauncher}/bin/prismlauncher";
Icon = "${pkgs.prismlauncher}/share/icons/hicolor/scalable/apps/org.prismlauncher.PrismLauncher.svg";
Tags = [ "Game" ];
}
];
};
}

View File

@@ -0,0 +1,38 @@
{
username,
inputs,
site_config,
...
}:
{
imports = [
../../modules/desktop-common.nix
../../modules/desktop-jovian.nix
./disk.nix
./impermanence.nix
inputs.impermanence.nixosModules.impermanence
];
networking.hostId = "a1b2c3d4";
# SSH for remote management from laptop
services.openssh = {
enable = true;
ports = [ 22 ];
settings = {
PasswordAuthentication = false;
PermitRootLogin = "yes";
};
};
users.users.${username}.openssh.authorizedKeys.keys = [
site_config.ssh_keys.laptop
];
users.users.root.openssh.authorizedKeys.keys = [
site_config.ssh_keys.laptop
];
jovian.devices.steamdeck.enable = true;
}

52
hosts/patiodeck/disk.nix Normal file
View File

@@ -0,0 +1,52 @@
{
disko.devices = {
disk = {
main = {
type = "disk";
content = {
type = "gpt";
partitions = {
ESP = {
type = "EF00";
size = "500M";
content = {
type = "filesystem";
format = "vfat";
mountpoint = "/boot";
};
};
nix = {
size = "200G";
content = {
type = "filesystem";
format = "f2fs";
mountpoint = "/nix";
};
};
persistent = {
size = "100%";
content = {
type = "filesystem";
format = "f2fs";
mountpoint = "/persistent";
};
};
};
};
};
};
nodev = {
"/" = {
fsType = "tmpfs";
mountOptions = [
"defaults"
"size=2G"
"mode=755"
];
};
};
};
fileSystems."/persistent".neededForBoot = true;
fileSystems."/nix".neededForBoot = true;
}

8
hosts/patiodeck/home.nix Normal file
View File

@@ -0,0 +1,8 @@
{ ... }:
{
imports = [
../../home/profiles/gui.nix
../../home/profiles/desktop.nix
../../home/progs/steam-shortcuts.nix
];
}

View File

@@ -0,0 +1,48 @@
{
username,
...
}:
{
environment.persistence."/persistent" = {
hideMounts = true;
directories = [
"/var/log"
"/var/lib/systemd/coredump"
"/var/lib/nixos"
"/var/lib/systemd/timers"
# agenix identity sealed by the TPM
{
directory = "/var/lib/agenix";
mode = "0700";
user = "root";
group = "root";
}
];
files = [
"/etc/ssh/ssh_host_ed25519_key"
"/etc/ssh/ssh_host_ed25519_key.pub"
"/etc/ssh/ssh_host_rsa_key"
"/etc/ssh/ssh_host_rsa_key.pub"
"/etc/machine-id"
];
users.root = {
files = [
".local/share/fish/fish_history"
];
};
};
# bind mount home directory from persistent storage
fileSystems."/home/${username}" = {
device = "/persistent/home/${username}";
fsType = "none";
options = [ "bind" ];
neededForBoot = true;
};
systemd.tmpfiles.rules = [
"d /etc 755 root"
];
}

View File

@@ -1,5 +1,4 @@
{
config,
pkgs,
lib,
username,
@@ -10,13 +9,13 @@
{
imports = [
../../modules/desktop-common.nix
../../modules/desktop-jovian.nix
../../modules/no-rgb.nix
./disk.nix
./impermanence.nix
./vr.nix
inputs.impermanence.nixosModules.impermanence
inputs.jovian-nixos.nixosModules.default
];
fileSystems."/media/games" = {
@@ -83,145 +82,6 @@
systemd.services.lactd.serviceConfig.ExecStartPre = "${lib.getExe pkgs.bash} -c \"sleep 3s\"";
# root-level service that applies a pending update. Triggered by
# steamos-update (via systemctl start) when the user accepts an update.
# Runs as root so it can write the system profile and boot entry.
systemd.services.pull-update-apply = {
description = "Apply pending NixOS update pulled from binary cache";
serviceConfig = {
Type = "oneshot";
ExecStart = pkgs.writeShellScript "pull-update-apply" ''
set -uo pipefail
export PATH=${
pkgs.lib.makeBinPath [
pkgs.curl
pkgs.coreutils
pkgs.nix
]
}
STORE_PATH=$(curl -sf --max-time 30 "${site_config.binary_cache.url}/deploy/yarn" || true)
if [ -z "$STORE_PATH" ]; then
echo "server unreachable"
exit 1
fi
CURRENT=$(readlink -f /nix/var/nix/profiles/system)
if [ "$CURRENT" = "$STORE_PATH" ]; then
echo "already up to date: $STORE_PATH"
exit 0
fi
echo "applying $STORE_PATH (was $CURRENT)"
nix-store -r --add-root /nix/var/nix/gcroots/pull-update-apply-latest --indirect "$STORE_PATH" \
|| { echo "fetch failed"; exit 1; }
nix-env -p /nix/var/nix/profiles/system --set "$STORE_PATH" \
|| { echo "profile set failed"; exit 1; }
"$STORE_PATH/bin/switch-to-configuration" boot \
|| { echo "boot entry failed"; exit 1; }
echo "update applied; reboot required"
'';
};
};
# Allow primary user to start pull-update-apply.service without a password
security.polkit.extraConfig = ''
polkit.addRule(function(action, subject) {
if (action.id == "org.freedesktop.systemd1.manage-units" &&
action.lookup("unit") == "pull-update-apply.service" &&
subject.user == "${username}") {
return polkit.Result.YES;
}
});
'';
nixpkgs.config.allowUnfreePredicate =
pkg:
builtins.elem (lib.getName pkg) [
"steamdeck-hw-theme"
"steam-jupiter-unwrapped"
"steam"
"steam-original"
"steam-unwrapped"
"steam-run"
];
# Override jovian-stubs to disable steamos-update kernel check
# This prevents Steam from requesting reboots for "system updates"
# Steam client updates will still work normally
nixpkgs.overlays = [
(
final: prev:
let
deploy-url = "${site_config.binary_cache.url}/deploy/yarn";
steamos-update-script = final.writeShellScript "steamos-update" ''
export PATH=${
final.lib.makeBinPath [
final.curl
final.coreutils
final.systemd
]
}
STORE_PATH=$(curl -sf --max-time 30 "${deploy-url}" || true)
if [ -z "$STORE_PATH" ]; then
>&2 echo "[steamos-update] server unreachable"
exit 7
fi
CURRENT=$(readlink -f /nix/var/nix/profiles/system)
if [ "$CURRENT" = "$STORE_PATH" ]; then
>&2 echo "[steamos-update] no update available"
exit 7
fi
# check-only mode: just report that an update exists
if [ "''${1:-}" = "check" ] || [ "''${1:-}" = "--check-only" ]; then
>&2 echo "[steamos-update] update available"
exit 0
fi
# apply: trigger the root-running systemd service to install the update
>&2 echo "[steamos-update] applying update..."
if systemctl start --wait pull-update-apply.service; then
>&2 echo "[steamos-update] update installed, reboot to apply"
exit 0
else
>&2 echo "[steamos-update] apply failed; see 'journalctl -u pull-update-apply'"
exit 1
fi
'';
in
{
# Only replace holo-update (and its steamos-update alias) with our
# binary-cache pull script. All other stubs (pkexec, sudo,
# holo-reboot, holo-select-branch, …) come from upstream unchanged.
jovian-stubs = prev.jovian-stubs.overrideAttrs (old: {
buildCommand = (old.buildCommand or "") + ''
install -D -m 755 ${steamos-update-script} $out/bin/holo-update
install -D -m 755 ${steamos-update-script} $out/bin/steamos-update
'';
});
}
)
];
jovian = {
devices.steamdeck.enable = false;
steam = {
enable = true;
autoStart = true;
desktopSession = "niri";
user = username;
};
};
# Jovian-NixOS requires sddm
# https://github.com/Jovian-Experiments/Jovian-NixOS/commit/52f140c07493f8bb6cd0773c7e1afe3e1fd1d1fa
services.displayManager.sddm.wayland.enable = true;
# Disable gamescope from common.nix to avoid conflict with jovian-nixos
programs.gamescope.enable = lib.mkForce false;
# yarn is not a Steam Deck
jovian.devices.steamdeck.enable = false;
}

View File

@@ -1,15 +1,12 @@
{
pkgs,
inputs,
lib,
config,
...
}:
{
imports = [
../../home/profiles/gui.nix
../../home/profiles/desktop.nix
inputs.json2steamshortcut.homeModules.default
../../home/progs/steam-shortcuts.nix
];
home.packages = with pkgs; [
@@ -27,20 +24,4 @@
obs-pipewire-audio-capture
];
};
services.steam-shortcuts = {
enable = true;
overwriteExisting = true;
steamUserId = lib.strings.toInt (
lib.strings.trim (builtins.readFile ../../secrets/home/steam-user-id)
);
shortcuts = [
{
AppName = "Prism Launcher";
Exe = "${pkgs.prismlauncher}/bin/prismlauncher";
Icon = "${pkgs.prismlauncher}/share/icons/hicolor/scalable/apps/org.prismlauncher.PrismLauncher.svg";
Tags = [ "Game" ];
}
];
};
}

View File

@@ -0,0 +1,40 @@
# Jovian-NixOS deck-mode configuration shared by all hosts running Steam
# in gamescope (yarn, patiodeck). Host-specific settings (like
# jovian.devices.steamdeck.enable) stay in the host's default.nix.
{
lib,
username,
inputs,
...
}:
{
imports = [
./desktop-steam-update.nix
inputs.jovian-nixos.nixosModules.default
];
nixpkgs.config.allowUnfreePredicate =
pkg:
builtins.elem (lib.getName pkg) [
"steamdeck-hw-theme"
"steam-jupiter-unwrapped"
"steam"
"steam-original"
"steam-unwrapped"
"steam-run"
];
jovian.steam = {
enable = true;
autoStart = true;
desktopSession = "niri";
user = username;
};
# jovian overrides the display manager; sddm is required
services.displayManager.sddm.wayland.enable = true;
# desktop-common.nix enables programs.gamescope which conflicts with
# jovian's own gamescope wrapper
programs.gamescope.enable = lib.mkForce false;
}

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@@ -0,0 +1,122 @@
# Binary-cache update mechanism for Jovian-NixOS desktops.
#
# Replaces the upstream holo-update/steamos-update stubs with a script that
# checks the private binary cache for a newer system closure, and provides a
# root-level systemd service to apply it. Steam's deck UI calls
# `steamos-update check` periodically; exit 7 = no update, exit 0 = update
# applied or available.
#
# The deploy endpoint is ${binary_cache_url}/deploy/${hostname} — a plain
# text file containing the /nix/store path of the latest closure, published
# by CI after a successful build.
{
pkgs,
lib,
hostname,
username,
site_config,
...
}:
let
deploy-url = "${site_config.binary_cache.url}/deploy/${hostname}";
steamos-update-script = pkgs.writeShellScript "steamos-update" ''
export PATH=${
lib.makeBinPath [
pkgs.curl
pkgs.coreutils
pkgs.systemd
]
}
STORE_PATH=$(curl -sf --max-time 30 "${deploy-url}" || true)
if [ -z "$STORE_PATH" ]; then
>&2 echo "[steamos-update] server unreachable"
exit 7
fi
CURRENT=$(readlink -f /nix/var/nix/profiles/system)
if [ "$CURRENT" = "$STORE_PATH" ]; then
>&2 echo "[steamos-update] no update available"
exit 7
fi
# check-only mode: just report that an update exists
if [ "''${1:-}" = "check" ] || [ "''${1:-}" = "--check-only" ]; then
>&2 echo "[steamos-update] update available"
exit 0
fi
# apply: trigger the root-running systemd service to install the update
>&2 echo "[steamos-update] applying update..."
if systemctl start --wait pull-update-apply.service; then
>&2 echo "[steamos-update] update installed, reboot to apply"
exit 0
else
>&2 echo "[steamos-update] apply failed; see 'journalctl -u pull-update-apply'"
exit 1
fi
'';
in
{
nixpkgs.overlays = [
(_final: prev: {
jovian-stubs = prev.jovian-stubs.overrideAttrs (old: {
buildCommand = (old.buildCommand or "") + ''
install -D -m 755 ${steamos-update-script} $out/bin/holo-update
install -D -m 755 ${steamos-update-script} $out/bin/steamos-update
'';
});
})
];
systemd.services.pull-update-apply = {
description = "Apply pending NixOS update pulled from binary cache";
serviceConfig = {
Type = "oneshot";
ExecStart = pkgs.writeShellScript "pull-update-apply" ''
set -uo pipefail
export PATH=${
lib.makeBinPath [
pkgs.curl
pkgs.coreutils
pkgs.nix
]
}
STORE_PATH=$(curl -sf --max-time 30 "${deploy-url}" || true)
if [ -z "$STORE_PATH" ]; then
echo "server unreachable"
exit 1
fi
CURRENT=$(readlink -f /nix/var/nix/profiles/system)
if [ "$CURRENT" = "$STORE_PATH" ]; then
echo "already up to date: $STORE_PATH"
exit 0
fi
echo "applying $STORE_PATH (was $CURRENT)"
nix-store -r --add-root /nix/var/nix/gcroots/pull-update-apply-latest --indirect "$STORE_PATH" \
|| { echo "fetch failed"; exit 1; }
nix-env -p /nix/var/nix/profiles/system --set "$STORE_PATH" \
|| { echo "profile set failed"; exit 1; }
"$STORE_PATH/bin/switch-to-configuration" boot \
|| { echo "boot entry failed"; exit 1; }
echo "update applied; reboot required"
'';
};
};
# allow the primary user to trigger pull-update-apply without a password
security.polkit.extraConfig = ''
polkit.addRule(function(action, subject) {
if (action.id == "org.freedesktop.systemd1.manage-units" &&
action.lookup("unit") == "pull-update-apply.service" &&
subject.user == "${username}") {
return polkit.Result.YES;
}
});
'';
}

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