wol suspend if idle

bundles/wol-sleeper/files/suspend_if_idle

@@ -0,0 +1,35 @@
+#!/bin/bash
+
+UPTIME=$(cat /proc/uptime | cut -d. -f1)
+MIN_UPTIME=$(expr 60 \* 30)
+if [[ $UPTIME -lt $MIN_UPTIME ]]
+then
+  echo "ABORT: uptime ($UPTIME) lower than min ($MIN_UPTIME)"
+  exit 0
+fi
+
+for SERVICE in $(systemctl list-timers --no-pager --no-legend --state active -o json | jq -r '.[] | .activates')
+do
+  if systemctl is-active "$SERVICE" --quiet
+  then
+    echo "ABORT: service $SERVICE is running by timer"
+    exit 0
+  fi
+done
+
+LOGINS=$(who -u | grep pts\/ | wc -l)
+if ! [[ $LOGINS =~ "^0$" ]]
+then
+  echo "ABORT: $LOGINS user logins"
+  exit 0
+fi
+
+if [[ $1 = now ]]
+then
+  echo "SESPENDING"
+  sleep 10
+  systemctl suspend
+else
+  echo "WOULD SESPEND"
+  sleep 300
+fi

bundles/wol-sleeper/items.py

@@ -1,3 +1,9 @@
 waker_node = repo.get_node(node.metadata.get('wol-sleeper/waker'))
 if not waker_node.has_bundle('wol-waker'):
     raise Exception(f'waker node {waker_node.name} does not have bundle wol-waker')
+
+files = {
+    '/opt/suspend_if_idle': {
+        'mode': '550',
+    },
+}

bundles/wol-sleeper/metadata.py

@@ -1,5 +1,17 @@
 from ipaddress import ip_interface
 
+@metadata_reactor.provides(
+    'systemd-timers/suspend-if-idle',
+)
+def timer(metadata):
+    return {
+        'systemd-timers': {
+            'suspend-if-idle': {
+                'command': '/opt/suspend_if_idle now',
+                'when': 'minutely',
+            },
+        },
+    }
 
 @metadata_reactor.provides(
     'wol-sleeper/wake_command',