From 652c1126d332886bba804fdb7f699fe4dc78e6c8 Mon Sep 17 00:00:00 2001
From: Charlie Marsh <charlie.r.marsh@gmail.com>
Date: Mon, 10 Jun 2024 10:36:29 -0700
Subject: [PATCH] Avoid crash for `XDG_CONFIG_HOME=/dev/null` (#4200)

## Summary

Closes https://github.com/astral-sh/uv/issues/4199.

## Test Plan

`XDG_CONFIG_HOME=/dev/null cargo run venv`
---
 crates/uv-workspace/src/workspace.rs | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/crates/uv-workspace/src/workspace.rs b/crates/uv-workspace/src/workspace.rs
index 22d376353..8a0831754 100644
--- a/crates/uv-workspace/src/workspace.rs
+++ b/crates/uv-workspace/src/workspace.rs
@@ -27,6 +27,14 @@ impl Workspace {
         match read_file(&file) {
             Ok(options) => Ok(Some(Self { options, root })),
             Err(WorkspaceError::Io(err)) if err.kind() == std::io::ErrorKind::NotFound => Ok(None),
+            Err(_) if !dir.is_dir() => {
+                // Ex) `XDG_CONFIG_HOME=/dev/null`
+                debug!(
+                    "User configuration directory `{}` does not exist or is not a directory",
+                    dir.display()
+                );
+                Ok(None)
+            }
             Err(err) => Err(err),
         }
     }