False cache positive with generated code

[TheLudd]

Current Behavior

I have tasks that generate code in my repository.
The code is generated from an internal tool, and the generate task has the internal tool source as input.
There are then test tasks that depend on the generate task.

If the code for the code generating tool is changed, then the cache for the generate task is invalidated, but the cache for the subsequent test tasks is not invalidated. This causes tests to pass even if the code generator introduces bugs.

Expected Behavior

When output is generated in an nx task that a subsequent task uses as input, changes in the output should always invalidate the cache for the subsequent task

GitHub Repo

https://github.com/TheLudd/nxcache

Steps to Reproduce

1. Clone the repo
2. check out the master branch
3. run pnpm install
4. run pnpm test
5. checkout the branch bug
6. run pnpm test again

Nx Report

NX   Report complete - copy this into the issue template

Node           : 20.18.0
OS             : linux-x64
Native Target  : x86_64-linux
pnpm           : 9.14.2

nx  : 20.3.2

Failure Logs

Package Manager Version

No response

Operating System

• macOS
• Linux
• Windows
• Other (Please specify)

Additional Information

No response

[AgentEnder]

Hey @TheLudd - this is almost certainly caused by Nx not considering gitignored files as part of the hash. You should be able to use this feature to work around the issue: https://nx.dev/reference/inputs#outputs-of-dependent-tasks