Add support for nut's powervalue config per-device (#292)

nut/DOCS.md

@@ -143,6 +143,14 @@ specific drivers.
 This is the serial port where the UPS is connected. The first serial port
 usually is `/dev/ttyS0`. Use `auto` to automatically detect the port.
 
+#### Sub-option: `powervalue`
+
+Optionally lets you set whether this particular UPS provides power to the
+device this add-on is running on. Useful if you have multiple UPS that you
+wish to monitor, but you don't want low battery on some of them to shut down
+this host. Acceptable values are `1` for "providing power to this host" or `0`
+for "monitor only". Defaults to `1`
+
 #### Sub-option: `config`
 
 A list of additional [options][ups-fields] to configure for this UPS. The common

nut/config.yaml

@@ -51,6 +51,7 @@ schema:
     - name: str
       driver: str
       port: str
+      powervalue: int?
       config:
         - str
   mode: list(netserver|netclient)

nut/rootfs/etc/cont-init.d/nut.sh

@@ -80,6 +80,11 @@ if bashio::config.equals 'mode' 'netserver' ;then
         upsname=$(bashio::config "devices[${device}].name")
         upsdriver=$(bashio::config "devices[${device}].driver")
         upsport=$(bashio::config "devices[${device}].port")
+        if bashio::config.has_value "devices[${device}].powervalue"; then
+            upspowervalue=$(bashio::config "devices[${device}].powervalue")
+        else
+            upspowervalue="1"
+        fi
 
         bashio::log.info "Configuring Device named ${upsname}..."
         {
@@ -96,7 +101,7 @@ if bashio::config.equals 'mode' 'netserver' ;then
         done
         IFS="$OIFS"
 
-        echo "MONITOR ${upsname}@localhost 1 upsmonmaster ${upsmonpwd} master" \
+        echo "MONITOR ${upsname}@localhost ${upspowervalue} upsmonmaster ${upsmonpwd} master" \
             >> /etc/nut/upsmon.conf
     done