init: guarddog-nexus project skeleton

guarddog_nexus/config.py

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+"""Configuration via environment variables."""
+
+import os
+from dataclasses import dataclass, field
+
+
+@dataclass
+class Config:
+    nexus_url: str = os.getenv("NEXUS_URL", "http://localhost:8081")
+    nexus_username: str = os.getenv("NEXUS_USERNAME", "admin")
+    nexus_password: str = os.getenv("NEXUS_PASSWORD", "admin123")
+    nexus_repositories: list[str] = field(default_factory=lambda: _parse_repos())
+
+    database_path: str = os.getenv("DATABASE_PATH", "data/guarddog.db")
+
+    host: str = os.getenv("HOST", "0.0.0.0")
+    port: int = int(os.getenv("PORT", "8080"))
+
+    log_level: str = os.getenv("LOG_LEVEL", "INFO")
+    log_syslog_host: str = os.getenv("LOG_SYSLOG_HOST", "")
+    log_syslog_port: int = int(os.getenv("LOG_SYSLOG_PORT", "514"))
+
+    webhook_secret: str = os.getenv("WEBHOOK_SECRET", "")
+
+    scan_timeout_seconds: int = int(os.getenv("SCAN_TIMEOUT_SECONDS", "300"))
+    temp_dir: str = os.getenv("TEMP_DIR", "/tmp/guarddog-nexus")
+
+
+def _parse_repos() -> list[str]:
+    raw = os.getenv("NEXUS_REPOSITORIES", "")
+    return [r.strip() for r in raw.split(",") if r.strip()]
+
+
+config = Config()

guarddog_nexus/database.py

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+"""Async SQLite database setup via SQLAlchemy."""
+
+from sqlalchemy.ext.asyncio import AsyncSession, async_sessionmaker, create_async_engine
+from sqlalchemy.orm import DeclarativeBase
+
+from guarddog_nexus.config import config
+
+DATABASE_URL = f"sqlite+aiosqlite:///{config.database_path}"
+
+_engine = create_async_engine(DATABASE_URL, echo=False)
+_async_session = async_sessionmaker(_engine, class_=AsyncSession, expire_on_commit=False)
+
+
+class Base(DeclarativeBase):
+    pass
+
+
+async def init_db():
+    import guarddog_nexus.models  # noqa: F401
+
+    async with _engine.begin() as conn:
+        await conn.run_sync(Base.metadata.create_all)
+
+
+async def get_session() -> AsyncSession:
+    async with _async_session() as session:
+        yield session