pkgs/nixfiles: rename nixfiles-system-upgrade to clerie-system-upgrade

pkgs/clerie-system-upgrade/clerie-system-upgrade.nix

@@ -0,0 +1,11 @@
+{ pkgs, ... }:
+
+pkgs.writeShellApplication {
+  name = "clerie-system-upgrade";
+  text = builtins.readFile ./clerie-system-upgrade.sh;
+  runtimeInputs = with pkgs; [
+    curl
+    jq
+    nix
+  ];
+}

pkgs/clerie-system-upgrade/clerie-system-upgrade.sh

@@ -0,0 +1,79 @@
+#!/usr/bin/env bash
+
+set -euo pipefail
+
+ALLOW_REBOOT=
+NO_CONFIRM=
+NODE_EXPORTER_METRICS_PATH=
+
+while [[ $# -gt 0 ]]; do
+	case $1 in
+		--allow-reboot)
+			ALLOW_REBOOT=1
+			shift
+		;;
+		--no-confirm)
+			NO_CONFIRM=1
+			shift
+		;;
+		--node-exporter-metrics-path)
+			NODE_EXPORTER_METRICS_PATH=$2
+			shift
+			shift
+		;;
+		*)
+			echo "Unknown option $1"
+			exit 1
+		;;
+	esac
+done
+
+HYDRA_JOB_URL="https://hydra.clerie.de/job/nixfiles/nixfiles/nixosConfigurations.${HOSTNAME}/latest-finished"
+
+echo "Fetching job output from ${HYDRA_JOB_URL}"
+STORE_PATH="$(curl --fail -s -L -H "Accept: application/json" "${HYDRA_JOB_URL}" | jq -r ".buildoutputs.out.path")"
+
+if [[ -z $NO_CONFIRM ]]; then
+	echo ""
+	echo "  ! WARNING !"
+	echo ""
+	echo "  You are about to upgrade ${HOSTNAME} to ${STORE_PATH}."
+	echo "  This can be an older version than currently running on this system."
+	echo ""
+	read -e -r -p "Continue?" confirm
+	echo "$confirm" > /dev/null
+fi
+
+echo "Download ${STORE_PATH}"
+nix copy --from "https://nix-cache.clerie.de" "${STORE_PATH}"
+
+echo "Add to system profile"
+nix-env -p "/nix/var/nix/profiles/system" --set "${STORE_PATH}"
+
+echo "Set as boot target"
+/nix/var/nix/profiles/system/bin/switch-to-configuration boot
+
+if [[ -n "$NODE_EXPORTER_METRICS_PATH" ]]; then
+	echo "Write monitoring check data"
+	echo "clerie_system_upgrade_last_check $(date +%s)" > "$NODE_EXPORTER_METRICS_PATH"
+fi
+
+BOOTED_SYSTEM_KERNEL="$(readlink /run/booted-system/{initrd,kernel,kernel-modules})"
+ACTIVATING_SYSTEM_KERNEL="$(readlink /nix/var/nix/profiles/system/{initrd,kernel,kernel-modules})"
+
+if [[ "$BOOTED_SYSTEM_KERNEL" != "$ACTIVATING_SYSTEM_KERNEL" ]]; then
+	echo "Reboot is required"
+	if [[ -n "$ALLOW_REBOOT" ]]; then
+		echo "Rebooting system now"
+		shutdown -r +1 "System update requires reboot"
+	else
+		echo "Automatic reboot not allowed (maybe use --allow-reboot next time)"
+		echo "The system upgrade is staged, please reboot manually soon"
+	fi
+else
+	echo "No reboot is required"
+	echo "Activating system now"
+	/nix/var/nix/profiles/system/bin/switch-to-configuration switch
+fi
+
+echo "Finished system upgrade"