run-commands workspace task caching does not function correctly. about nx

[AgentEnder]

The command is updating a file in the workspace root, and the project root is equal to the workspace root. Given that, consider that the hash includes all files under the project root by default.

1st run: hello.txt likely doesn't exist, hash is XXX. Creates hello.txt
2nd run: hello.txt exists and included in hash. Hash is YYY. Recreates hello.txt, but with exact same contents
3rd run: hello.txt exists, its hash is same. Full target hash is YYY. Cache hit.

You can verify this is the behavior you are seeing by replacing echo Hello > hello.txt with echo Hello >> hello.txt. This will always append to the file, thus always altering its hash, and you'll never get a cache hit.

The fix is to specify file inputs for the target.