fix: working init

abra.sh

@@ -0,0 +1 @@
+export APP_ENTRYPOINT_VERSION=v1

compose.yml

@@ -11,9 +11,14 @@ services:
       - PUID=1000
       - TZ
     volumes:
+      - config:/config
       - books:/books
     networks:
       - proxy
+    configs:
+      - source: app_entrypoint
+        target: /config/custom-cont-init.d/entrypoint.sh
+        mode: 0555
     deploy:
       restart_policy:
         condition: on-failure
@@ -36,3 +41,10 @@ networks:
 
 volumes:
   books:
+  config:
+
+configs:
+  app_entrypoint:
+    name: ${STACK_NAME}_app_entrypoint_${APP_ENTRYPOINT_VERSION}
+    file: entrypoint.sh.tmpl
+    template_driver: golang

entrypoint.sh.tmpl

@@ -0,0 +1,33 @@
+#!/bin/bash
+
+set -e
+
+file_env() {
+   local var="$1"
+   local fileVar="${var}_FILE"
+   local def="${2:-}"
+
+   if [ "${!var:-}" ] && [ "${!fileVar:-}" ]; then
+      echo >&2 "error: both $var and $fileVar are set (but are exclusive)"
+      exit 1
+   fi
+
+   local val="$def"
+
+   if [ "${!var:-}" ]; then
+      val="${!var}"
+   elif [ "${!fileVar:-}" ]; then
+      val="$(< "${!fileVar}")"
+   fi
+
+   export "$var"="$val"
+   unset "$fileVar"
+}
+
+if [ ! -f "/books/metadata.db" ]; then
+   /usr/bin/mkdir -p /books
+   /usr/bin/calibredb restore_database --really-do-it --with-library /books
+   /usr/bin/chown abc:abc /books/metadata.db
+else
+   echo "/books/metadata.db exists, not creating another one"
+fi