Add Dbus to allow Shairport-Sync to run

Dockerfile

@@ -16,6 +16,7 @@ RUN set -ex \
   && echo "**** install runtime packages ****" \
   && apk add --no-cache -U --upgrade \
     alsa-utils \
+    dbus \
     librespot@testing=~${LIBRESPOT_RELEASE} \
     shairport-sync@testing \
     snapcast=~${SNAPCAST_RELEASE} \
@@ -28,6 +29,7 @@ RUN set -ex \
 # environment settings
 ENV \
 START_SNAPCLIENT=false \
+START_AIRPLAY=false \
 SNAPCLIENT_OPTS="" \
 SNAPSERVER_OPTS=""
 

README.md

@@ -53,6 +53,7 @@ services:
       # - SNAPCLIENT_OPTS=--host snapcast --soundcard <ID>
       #   => Don't use quotes for SNAPCLIENT_OPTS="" !
       # - HOST_AUDIO_GROUP=<AUDIO-GID> # set to GID of host audio group
+      - START_AIRPLAY=false # set to 'true' to enable Airplay support via Shairport-sync
     restart: "unless-stopped"
     ports:
       - 1704:1704

docker-compose.example.yml

@@ -13,6 +13,7 @@ services:
       # - SNAPCLIENT_OPTS=--host snapcast --soundcard <ID>
       #   => Don't use quotes for SNAPCLIENT_OPTS="" !
       # - HOST_AUDIO_GROUP=<AUDIO-GID> # set to GID of host audio group
+      - START_AIRPLAY=false # set to 'true' to enable Airplay support via Shairport-sync
     restart: "unless-stopped"
     ports:
       - 1704:1704 # port for the actual audio streaming

root/etc/s6-overlay/s6-rc.d/svc-dbus/finish

@@ -0,0 +1,2 @@
+#!/command/execlineb -S0
+/run/s6/basedir/bin/halt

root/etc/s6-overlay/s6-rc.d/svc-dbus/notification-fd

@@ -0,0 +1 @@
+3

root/etc/s6-overlay/s6-rc.d/svc-dbus/run

@@ -0,0 +1,7 @@
+#!/usr/bin/with-contenv bash
+
+if [ "$START_AIRPLAY" = 'true' ]; then
+  mkdir -p /run/dbus
+  exec s6-notifyoncheck -d -n 300 -w 1000 -c "dbus-send --system / org.freedesktop.DBus.Peer.Ping" \
+    dbus-daemon --system --nofork --nopidfile
+fi

root/etc/s6-overlay/s6-rc.d/svc-dbus/type

@@ -0,0 +1 @@
+longrun