Implement Wallboard Display Toggle with Automations

scripts/install-wallboard-sshkey.sh

@@ -0,0 +1,28 @@
+#!/usr/bin/env bash
+
+DIR=$(dirname "$(readlink -f "$0")")
+
+KEYFILE="$DIR/../ssh-key/homeassistant-wallboard-hdmi-sshkey"
+TARGET="~/.ssh/authorized_keys"
+
+if [ $# == 0 ] ; then
+    echo "Usage: install-wallboard-hdmi-sshkey.sh user@wallboard-ip"
+    exit 1;
+fi
+
+if [ ! -f $KEYFILE ]; then
+	echo "You need to create the SSH-Key-File first: \"$KEYFILE\""
+	echo "Use: \"ssh-keygen -t ed25519 -C homeassistant-wallboard-hdmi-sshkey -f $KEYFILE\""
+	exit 1
+fi
+
+SSHKEY=$(<"$KEYFILE.pub")
+echo "command=\"vcgencmd \$SSH_ORIGINAL_COMMAND\" $SSHKEY" | ssh $1 '\
+	mkdir -p .ssh && \
+	chmod 700 .ssh && \
+	touch .ssh/authorized_keys && \
+	chmod 600 .ssh/authorized_keys && \
+	tee -a .ssh/authorized_keys \
+' >/dev/null
+
+echo "Installed the ssh key into \"$1:$TARGET\"."