fix: use python:3.12-alpine3.21 from Docker Hub, rewrite run.sh without bashio

fichero_printer/Dockerfile

@@ -1,18 +1,18 @@
 ARG BUILD_FROM
 FROM $BUILD_FROM
 
-# System libraries: BlueZ for BLE/RFCOMM + build tools for numpy & pillow
+# BlueZ for BLE/RFCOMM + build tools for packages without binary wheels
 RUN apk add --no-cache \
+    bash \
     bluez \
     dbus \
     gcc \
     musl-dev \
     libjpeg-turbo-dev \
-    zlib-dev \
-    libffi-dev
+    zlib-dev
 
 # Install Python runtime dependencies
-RUN pip3 install --no-cache-dir --break-system-packages \
+RUN pip install --no-cache-dir \
     "bleak>=0.21" \
     "numpy" \
     "pillow" \
@@ -21,7 +21,7 @@ RUN pip3 install --no-cache-dir --break-system-packages \
     "python-multipart>=0.0.9"
 
 # Remove build-only packages to keep the image slim
-RUN apk del gcc musl-dev libffi-dev
+RUN apk del gcc musl-dev
 
 # Copy the fichero Python package into the container
 WORKDIR /app

fichero_printer/build.yaml

@@ -1,6 +1,6 @@
 build_from:
-  aarch64: "ghcr.io/home-assistant/aarch64-base-python:3.12"
-  amd64: "ghcr.io/home-assistant/amd64-base-python:3.12"
-  armhf: "ghcr.io/home-assistant/armhf-base-python:3.12"
-  armv7: "ghcr.io/home-assistant/armv7-base-python:3.12"
-  i386: "ghcr.io/home-assistant/i386-base-python:3.12"
+  aarch64: "python:3.12-alpine3.21"
+  amd64: "python:3.12-alpine3.21"
+  armhf: "python:3.12-alpine3.21"
+  armv7: "python:3.12-alpine3.21"
+  i386: "python:3.12-alpine3.21"

fichero_printer/run.sh

@@ -1,29 +1,24 @@
-#!/usr/bin/with-contenv bashio
-# shellcheck shell=bash
+#!/bin/sh
+# shellcheck shell=sh
 set -e
 
-declare port
-declare ble_address
-declare transport
-declare channel
+CONFIG_PATH="/data/options.json"
 
-port=$(bashio::config 'port')
-transport=$(bashio::config 'transport')
-channel=$(bashio::config 'channel')
+# Read add-on options from the HA-provided JSON file using Python (already installed).
+PORT=$(python3 -c "import json; d=json.load(open('${CONFIG_PATH}')); print(d.get('port', 8765))")
+TRANSPORT=$(python3 -c "import json; d=json.load(open('${CONFIG_PATH}')); print(d.get('transport', 'ble'))")
+CHANNEL=$(python3 -c "import json; d=json.load(open('${CONFIG_PATH}')); print(d.get('channel', 1))")
+BLE_ADDRESS=$(python3 -c "import json; d=json.load(open('${CONFIG_PATH}')); print(d.get('ble_address') or '')")
 
-# Pass connection settings to the Python module via environment variables.
-# The module reads these at import time, so they must be exported before uvicorn
-# imports fichero.api.
-export FICHERO_TRANSPORT="${transport}"
-export FICHERO_CHANNEL="${channel}"
+export FICHERO_TRANSPORT="${TRANSPORT}"
+export FICHERO_CHANNEL="${CHANNEL}"
 
-ble_address=$(bashio::config 'ble_address')
-if [ -n "${ble_address}" ]; then
-    export FICHERO_ADDR="${ble_address}"
-    bashio::log.info "Using fixed Bluetooth address: ${ble_address}"
+if [ -n "${BLE_ADDRESS}" ]; then
+    export FICHERO_ADDR="${BLE_ADDRESS}"
+    echo "[fichero] Using fixed Bluetooth address: ${BLE_ADDRESS}"
 else
-    bashio::log.info "No address configured – will auto-scan for printer on first request."
+    echo "[fichero] No address configured - will auto-scan for printer on first request."
 fi
 
-bashio::log.info "Starting Fichero Printer API on 0.0.0.0:${port} (transport: ${transport})..."
-exec uvicorn fichero.api:app --host 0.0.0.0 --port "${port}"
+echo "[fichero] Starting Fichero Printer API on 0.0.0.0:${PORT} (transport: ${TRANSPORT})..."
+exec uvicorn fichero.api:app --host 0.0.0.0 --port "${PORT}"