CLI (#12284)

Co-authored-by: Harrison Chase <hw.chase.17@gmail.com>

libs/cli/langchain_cli/utils/packages.py

@@ -0,0 +1,16 @@
+from pathlib import Path
+from typing import Set, Optional
+
+
+def get_package_root(cwd: Optional[Path] = None) -> Path:
+    # traverse path for routes to host (any directory holding a pyproject.toml file)
+    package_root = Path.cwd() if cwd is None else cwd
+    visited: Set[Path] = set()
+    while package_root not in visited:
+        visited.add(package_root)
+
+        pyproject_path = package_root / "pyproject.toml"
+        if pyproject_path.exists():
+            return package_root
+        package_root = package_root.parent
+    raise FileNotFoundError("No pyproject.toml found")