Add systemd script for Spoolbuddy daemon

spoolbuddy/daemon/config.py

@@ -1,17 +1,26 @@
-"""Configuration loader for SpoolBuddy daemon."""
+"""Configuration loader for SpoolBuddy daemon.
+
+All configuration is via environment variables. The systemd service file
+or a shell wrapper sets these before launching the daemon.
+
+Required:
+    SPOOLBUDDY_BACKEND_URL  — Bambuddy server URL (e.g. http://192.168.1.100:5000)
+    SPOOLBUDDY_API_KEY      — API key created in Bambuddy Settings → API Keys
+
+Optional:
+    SPOOLBUDDY_DEVICE_ID    — Unique device identifier (default: derived from MAC)
+    SPOOLBUDDY_HOSTNAME     — Display name (default: system hostname)
+"""
 
 import os
+import socket
 from dataclasses import dataclass
 from pathlib import Path
 
-import yaml
-
-CONFIG_PATH = Path(os.environ.get("SPOOLBUDDY_CONFIG", "/etc/spoolbuddy/config.yaml"))
-
 
 @dataclass
 class Config:
-    backend_url: str = "http://localhost:5000"
+    backend_url: str = ""
     api_key: str = ""
     device_id: str = ""
     hostname: str = ""
@@ -30,25 +39,15 @@ class Config:
     def load(cls) -> "Config":
         cfg = cls()
 
-        # Load from YAML if exists
-        if CONFIG_PATH.exists():
-            with open(CONFIG_PATH) as f:
-                data = yaml.safe_load(f) or {}
-            for key, val in data.items():
-                if hasattr(cfg, key):
-                    setattr(cfg, key, val)
+        cfg.backend_url = os.environ.get("SPOOLBUDDY_BACKEND_URL", "")
+        cfg.api_key = os.environ.get("SPOOLBUDDY_API_KEY", "")
+        cfg.device_id = os.environ.get("SPOOLBUDDY_DEVICE_ID", "")
+        cfg.hostname = os.environ.get("SPOOLBUDDY_HOSTNAME", "")
 
-        # Environment overrides
-        env_map = {
-            "SPOOLBUDDY_BACKEND_URL": "backend_url",
-            "SPOOLBUDDY_API_KEY": "api_key",
-            "SPOOLBUDDY_DEVICE_ID": "device_id",
-            "SPOOLBUDDY_HOSTNAME": "hostname",
-        }
-        for env_key, attr in env_map.items():
-            val = os.environ.get(env_key)
-            if val:
-                setattr(cfg, attr, val)
+        if not cfg.backend_url:
+            raise RuntimeError("SPOOLBUDDY_BACKEND_URL is required (e.g. http://192.168.1.100:5000)")
+        if not cfg.api_key:
+            raise RuntimeError("SPOOLBUDDY_API_KEY is required (create one in Bambuddy Settings → API Keys)")
 
         # Default device_id from MAC address
         if not cfg.device_id:
@@ -56,8 +55,6 @@ class Config:
 
         # Default hostname from system
         if not cfg.hostname:
-            import socket
-
             cfg.hostname = socket.gethostname()
 
         return cfg

spoolbuddy/daemon/main.py

@@ -6,8 +6,8 @@ import logging
 import socket
 import time
 
-from spoolbuddy.daemon.api_client import APIClient
-from spoolbuddy.daemon.config import Config
+from .api_client import APIClient
+from .config import Config
 
 logging.basicConfig(
     level=logging.INFO,
@@ -30,7 +30,7 @@ def _get_ip() -> str:
 
 async def nfc_poll_loop(config: Config, api: APIClient):
     """Continuous NFC polling loop — runs in asyncio with blocking reads offloaded."""
-    from spoolbuddy.daemon.nfc_reader import NFCReader
+    from .nfc_reader import NFCReader
 
     nfc = NFCReader()
     if not nfc.ok:
@@ -62,7 +62,7 @@ async def nfc_poll_loop(config: Config, api: APIClient):
 
 async def scale_poll_loop(config: Config, api: APIClient):
     """Continuous scale reading loop — reads at 100ms, reports at 1s intervals."""
-    from spoolbuddy.daemon.scale_reader import ScaleReader
+    from .scale_reader import ScaleReader
 
     scale = ScaleReader(
         tare_offset=config.tare_offset,

spoolbuddy/daemon/systemd/spoolbuddy.service

@@ -6,8 +6,10 @@ Wants=network-online.target
 [Service]
 Type=simple
 User=pi
-Environment=SPOOLBUDDY_CONFIG=/etc/spoolbuddy/config.yaml
-ExecStart=/usr/bin/python3 -m spoolbuddy.daemon.main
+WorkingDirectory=/opt/bambuddy/spoolbuddy
+Environment=SPOOLBUDDY_BACKEND_URL=http://bambuddy:5000
+Environment=SPOOLBUDDY_API_KEY=bb_change_me
+ExecStart=/usr/bin/python3 -m daemon.main
 Restart=always
 RestartSec=5
 StandardOutput=journal