[libcxx-commits] [libcxx] [libc++][lit] Atomically update the persistent cache (PR #66538)

[Alexander Richardson via libcxx-commits]

================
@@ -69,8 +69,12 @@ def f(config, *args, **kwargs):
             if cacheKey not in cache:
                 cache[cacheKey] = function(config, *args, **kwargs)
                 # Update the persistent cache so it knows about the new key
-                with open(persistentCache, "wb") as cacheFile:
+                # We write to a temporary file and rename the result to ensure
+                # that the cahe is not corrupted when running the test suite
----------------
arichardson wrote:

```suggestion
                # that the cache is not corrupted when running the test suite
```
typo

https://github.com/llvm/llvm-project/pull/66538