feat(projects): automate project infrastructure provisioning

app/services/project_inp.py

@@ -0,0 +1,35 @@
+from collections.abc import Iterator
+from contextlib import contextmanager
+from pathlib import Path
+from tempfile import NamedTemporaryFile
+
+from app.native.wndb.inp.exporter import dump_inp
+
+
+PROJECT_INP_DIRECTORY = Path("db_inp")
+
+
+@contextmanager
+def temporary_project_inp(
+    project_code: str,
+    *,
+    purpose: str,
+    version: str = "2",
+) -> Iterator[Path]:
+    """Export one project model to an isolated INP and remove it afterwards."""
+    PROJECT_INP_DIRECTORY.mkdir(parents=True, exist_ok=True)
+    with NamedTemporaryFile(
+        dir=PROJECT_INP_DIRECTORY,
+        prefix=f"{purpose}_",
+        suffix=".inp",
+        delete=False,
+    ) as temporary_file:
+        path = Path(temporary_file.name).resolve()
+
+    try:
+        dump_inp(project_code, str(path), version)
+        if not path.is_file() or path.stat().st_size == 0:
+            raise ValueError(f"项目 {project_code!r} 的 INP 导出失败")
+        yield path
+    finally:
+        path.unlink(missing_ok=True)