Fix and consolidate command workspace resolution

autogpt/workspace.py

@@ -0,0 +1,39 @@
+import os
+from pathlib import Path
+
+# Set a dedicated folder for file I/O
+WORKSPACE_PATH = Path(os.getcwd()) / "auto_gpt_workspace"
+
+# Create the directory if it doesn't exist
+if not os.path.exists(WORKSPACE_PATH):
+    os.makedirs(WORKSPACE_PATH)
+
+
+def path_in_workspace(relative_path: str | Path) -> Path:
+    """Get full path for item in workspace
+
+    Parameters:
+        relative_path (str | Path): Path to translate into the workspace
+
+    Returns:
+        Path: Absolute path for the given path in the workspace
+    """
+    return safe_path_join(WORKSPACE_PATH, relative_path)
+
+
+def safe_path_join(base: Path, *paths: str | Path) -> Path:
+    """Join one or more path components, asserting the resulting path is within the workspace.
+
+    Args:
+        base (Path): The base path
+        *paths (str): The paths to join to the base path
+
+    Returns:
+        Path: The joined path
+    """
+    joined_path = base.joinpath(*paths).resolve()
+
+    if not joined_path.is_relative_to(base):
+        raise ValueError(f"Attempted to access path '{joined_path}' outside of working directory '{base}'.")
+
+    return joined_path