homebridge raspberry pi image override

deb/debian/postinst

@@ -49,6 +49,27 @@ if [ "$1" = "configure" ]; then
   # fix permissions on homebridge user home
   chown -R homebridge: /home/homebridge/.bashrc
 
+  # source /etc/os-release to get OS ID
+  . /etc/os-release
+
+  # add user to default groups if running on raspbian
+  if [ "$ID" = "raspbian" ]; then
+    for groupName in udio bluetooth dialout gpio video input i2c spi audio render; do
+      usermod -a -G $groupName homebridge 2> /dev/null
+    done
+  fi
+
+  # if running on Offical Homebridge Raspberry Pi, run as the "pi" user instead
+  if [ -z $2 ] && [ "$ID" = "raspbian" ] && [ -f /etc/hb-release ] && [ ! -f /etc/systemd/system/homebridge.service.d/override.conf ]; then
+    getent passwd pi > /dev/null
+    if [ "$?" -eq 0 ]; then
+      mkdir -p /etc/systemd/system/homebridge.service.d
+      echo "[Service]" > /etc/systemd/system/homebridge.service.d/override.conf
+      echo "User=pi" >> /etc/systemd/system/homebridge.service.d/override.conf
+      echo "Environment=\"UIX_CAN_SHUTDOWN_RESTART_HOST=1\"" >> /etc/systemd/system/homebridge.service.d/override.conf
+    fi
+  fi
+
   # clear any masks on the homebridge service
   systemctl unmask homebridge.service 2> /dev/null
 
@@ -64,14 +85,6 @@ if [ "$1" = "configure" ]; then
 
   # create symlink to hb-shell
   ln -fs /opt/homebridge/hb-shell /usr/local/bin/hb-shell
-
-  # add user to default groups if running on raspbian
-  . /etc/os-release
-  if [ "$ID" = "raspbian" ]; then
-    for groupName in udio bluetooth dialout gpio video input i2c spi audio render; do
-      usermod -a -G $groupName homebridge 2> /dev/null
-    done
-  fi
 fi
 
 # post-install only