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30 lines
921 B
Nix
30 lines
921 B
Nix
{ config, inputs, pkgs, lib, ... }:
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let
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inherit (config.networking) hostName;
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# Only enable auto upgrade if current config came from a clean tree
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# This avoids accidental auto-upgrades when working locally.
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isClean = inputs.self ? rev;
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in
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{
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system.autoUpgrade = {
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enable = isClean;
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dates = "hourly";
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flags = [
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"--refresh"
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];
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flake = "git://github.com/gburd/nix-config?ref=release-${hostName}";
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};
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# Only run if current config (self) is older than the new one.
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systemd.services.nixos-upgrade = lib.mkIf config.system.autoUpgrade.enable {
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serviceConfig.ExecCondition = lib.getExe (
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pkgs.writeShellScriptBin "check-date" ''
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lastModified() {
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nix flake metadata "$1" --refresh --json | ${lib.getExe pkgs.jq} '.lastModified'
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}
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test "$(lastModified "${config.system.autoUpgrade.flake}")" -gt "$(lastModified "self")"
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''
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);
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};
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}
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