chore: env path refactor (#3691)

Co-authored-by: Suchintan <suchintan@users.noreply.github.com>
Co-authored-by: Shuchang Zheng <wintonzheng0325@gmail.com>

skyvern/utils/env_paths.py

@@ -0,0 +1,46 @@
+from pathlib import Path
+from typing import Optional
+
+BACKEND_ENV_DEFAULT = ".env"
+FRONTEND_DIRNAME = "skyvern-frontend"
+FRONTEND_ENV_FILENAME = ".env"
+
+
+def resolve_backend_env_path(
+    basename: str = BACKEND_ENV_DEFAULT,
+) -> Path:
+    """Return the backend env file path inside the current working directory."""
+
+    env_path = Path.cwd() / basename
+
+    return env_path
+
+
+def resolve_frontend_env_path() -> Optional[Path]:
+    """Return the path to the frontend .env file (may not exist)."""
+
+    frontend_root: Optional[Path] = None
+
+    if frontend_root is None:
+        cwd_frontend = Path.cwd() / FRONTEND_DIRNAME
+        if cwd_frontend.exists() and cwd_frontend.is_dir():
+            frontend_root = cwd_frontend
+
+    if frontend_root is None:
+        module_based_frontend = Path(__file__).resolve().parent.parent.parent / FRONTEND_DIRNAME
+        if module_based_frontend.exists() and module_based_frontend.is_dir():
+            frontend_root = module_based_frontend
+
+    if frontend_root is None:
+        for parent in Path.cwd().parents:
+            candidate = parent / FRONTEND_DIRNAME
+            if candidate.exists() and candidate.is_dir():
+                frontend_root = candidate
+                break
+
+    if frontend_root is None:
+        return None
+
+    env_path = frontend_root / FRONTEND_ENV_FILENAME
+
+    return env_path