Adding a custom stage `stage4a` fails

[probonopd]

Describe the bug I would like to add a custom stage stage4a after the default stage4.

To Reproduce

stage-list: stage0 stage1 stage2 stage3 stage4 ./stage4a

https://github.com/probonopd/custom-raspberry-pi-os/blob/cd0ee0734602d6b910976373c57ae3ed308ec67d/.github/workflows/pi-gen.yml#L21

or

stage-list: stage0 stage1 stage2 stage3 stage4 stage4a

https://github.com/probonopd/custom-raspberry-pi-os/blob/65a99d75c62a424ab3a626e4a3d3c7e1e5b07cfb/.github/workflows/pi-gen.yml#L21

Expected behavior stage0 stage1 stage2 stage3 stage4 run from the default pi-gen, then my custom stage4a runs from my repository

Logs

Run usimd/pi-gen-action@v1
Validating input and generating pi-gen config
Error: stage-list must contain valid pi-gen stage names "stage[0-5]" and/or valid directories

• https://github.com/probonopd/custom-raspberry-pi-os/actions/runs/6995539883/job/19030500707

Additional context Please document a simple example where a custom stage is run after the default stages.

[usimd]

From your linked workflow file, it seems you've missed to add a checkout step of your own repository. That's not being done implicitly by the action.

To verify things initially, it could help to add a step

- run: tree

That way you can inspect the local working directory on the action runner. If you're custom stage dir is missing there, it cannot be found by pi-gen-action.

[probonopd]

Thank you very much @usimd.