Initial Seg Data Server Net platform

backend/app/config.py

@@ -0,0 +1,55 @@
+from __future__ import annotations
+
+import os
+from dataclasses import dataclass
+from pathlib import Path
+
+
+def _resolve_path(value: str | None, default: Path) -> Path:
+    base = Path(value).expanduser() if value else default
+    if not base.is_absolute():
+        base = default.parent / base
+    return base.resolve()
+
+
+@dataclass(frozen=True)
+class Settings:
+    project_root: Path
+    source_root: Path
+    db_path: Path
+    log_dir: Path
+    weights_root: Path
+    task_conda_env: str
+    backend_conda_env: str
+    weight_mode: str
+    enable_shell_tasks: bool
+
+
+def get_settings() -> Settings:
+    project_root = Path(os.getenv("SEG_DATA_SERVER_ROOT", Path(__file__).resolve().parents[2])).expanduser()
+    if not project_root.is_absolute():
+        project_root = (Path(__file__).resolve().parents[2] / project_root).resolve()
+    else:
+        project_root = project_root.resolve()
+
+    sibling_source = project_root.parent / "Seg"
+    default_source = sibling_source if sibling_source.exists() else project_root.parent
+    source_root = _resolve_path(os.getenv("SEG_SOURCE_ROOT"), default_source)
+    db_path = _resolve_path(os.getenv("SEG_BACKEND_DB"), project_root / "var" / "seg_data_server.sqlite3")
+    log_dir = _resolve_path(os.getenv("SEG_BACKEND_LOG_DIR"), project_root / "var" / "job_logs")
+    weights_root = (project_root / "weights").resolve()
+
+    return Settings(
+        project_root=project_root,
+        source_root=source_root,
+        db_path=db_path,
+        log_dir=log_dir,
+        weights_root=weights_root,
+        task_conda_env=os.getenv("SEG_TASK_CONDA_ENV", "seg_smp"),
+        backend_conda_env=os.getenv("SEG_BACKEND_CONDA_ENV", "seg_server"),
+        weight_mode=os.getenv("SEG_WEIGHT_MODE", "copy"),
+        enable_shell_tasks=os.getenv("SEG_ENABLE_SHELL_TASKS", "1") == "1",
+    )
+
+
+settings = get_settings()