Migrate old-style S6 scripts to s6-rc.d (#4311)

docker/ha-addon-rootfs/etc/s6-overlay/s6-rc.d/nginx/finish

@@ -0,0 +1,25 @@
+#!/command/with-contenv bashio
+# ==============================================================================
+# Community Hass.io Add-ons: ESPHome
+# Take down the S6 supervision tree when NGINX fails
+# ==============================================================================
+declare exit_code
+readonly exit_code_container=$(</run/s6-linux-init-container-results/exitcode)
+readonly exit_code_service="${1}"
+readonly exit_code_signal="${2}"
+
+bashio::log.info \
+  "Service NGINX exited with code ${exit_code_service}" \
+  "(by signal ${exit_code_signal})"
+
+if [[ "${exit_code_service}" -eq 256 ]]; then
+  if [[ "${exit_code_container}" -eq 0 ]]; then
+    echo $((128 + $exit_code_signal)) > /run/s6-linux-init-container-results/exitcode
+  fi
+  [[ "${exit_code_signal}" -eq 15 ]] && exec /run/s6/basedir/bin/halt
+elif [[ "${exit_code_service}" -ne 0 ]]; then
+  if [[ "${exit_code_container}" -eq 0 ]]; then
+    echo "${exit_code_service}" > /run/s6-linux-init-container-results/exitcode
+  fi
+  exec /run/s6/basedir/bin/halt
+fi

docker/ha-addon-rootfs/etc/s6-overlay/s6-rc.d/nginx/run

@@ -0,0 +1,15 @@
+#!/command/with-contenv bashio
+# shellcheck shell=bash
+# ==============================================================================
+# Community Hass.io Add-ons: ESPHome
+# Runs the NGINX proxy
+# ==============================================================================
+
+bashio::log.info "Waiting for ESPHome dashboard to come up..."
+
+while [[ ! -S /var/run/esphome.sock ]]; do
+  sleep 0.5
+done
+
+bashio::log.info "Starting NGINX..."
+exec nginx

docker/ha-addon-rootfs/etc/s6-overlay/s6-rc.d/nginx/type

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