dotfiles/modules/nixos/system/auto-upgrade.nix

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{
config,
pkgs,
lib,
...
}:
{
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# This setting only applies to NixOS, different on Darwin
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nix.gc.dates = "09:03"; # Run every morning (but before upgrade)
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# Update the system daily by pointing it at the flake repository
system.autoUpgrade = {
enable = lib.mkDefault false; # Don't enable by default
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dates = "09:33";
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flake = "git+${config.dotfilesRepo}";
randomizedDelaySec = "25min";
operation = "switch";
allowReboot = true;
rebootWindow = {
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lower = "09:01";
upper = "11:00";
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};
};
# Create an email notification service for failed jobs
systemd.services."notify-email@" =
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let
address = "system@${config.mail.server}";
in
{
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enable = config.mail.enable;
environment.SERVICE_ID = "%i";
script = ''
TEMPFILE=$(mktemp)
echo "From: ${address}" > $TEMPFILE
echo "To: ${address}" >> $TEMPFILE
echo "Subject: Failure in $SERVICE_ID" >> $TEMPFILE
echo -e "\nGot an error with $SERVICE_ID\n\n" >> $TEMPFILE
set +e
systemctl status $SERVICE_ID >> $TEMPFILE
set -e
${pkgs.msmtp}/bin/msmtp \
--file=${config.homePath}/.config/msmtp/config \
--account=system \
${address} < $TEMPFILE
'';
};
# Send an email whenever auto upgrade fails
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systemd.services.nixos-upgrade.onFailure = lib.mkIf config.systemd.services."notify-email@".enable [
"notify-email@%i.service"
];
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}