[Feature] Specify base branch, not just base-sha

[djfinnoy]

Is this feature missing in the latest version?

• I'm using the latest release

Is your feature request related to a problem? Please describe.

I want the base-sha option to poin to the latest commit in the base branch:

      - id: changed-files
        uses: tj-actions/changed-files@3b6c057cd82d1dafab565df2ba9fa489574a03b8  # v34.6.1
        with:
          sha: ${{ github.event.pull_request.head.sha }}
          base_sha: ${{ github.event.pull_request.base.sha }}

However, there is a problem with Github Actions where github.event.pull_request.base.sha does not necessarily refer to the latest commit of the base branch: community/community#39880

Describe the solution you'd like?

It would be super great if this tool supported a base-branch option, instead of relying on the user to figure out the correct sha for the base branch.

Describe alternatives you've considered?

Wait for GitHub to fix github.event.pull_request.base.sha

Anything else?

No response

Code of Conduct

• I agree to follow this project's Code of Conduct

[github-actions]

Thanks for reporting this issue, don't forget to star this project if you haven't already to help us reach a wider audience.

[jackton1]

@djfinnoy I believe you can omit both sha and base_sha inputs since they are automatically determined, this also includes the base branch.

The action relies on running a diff with the sha instead of branch names which provides more control.

I also noticed that you aren't using the latest version you might want to upgrade to resolve any bugs you might have been experiencing.

See the usage section for more information.

[djfinnoy]

My apologies, I failed to understand my own code from a few months ago.

github.event.pull_request.base.sha intentionally refers to the commit sha of the base branch, as it was when the PR was created. There is no problem here. If I omit both, I would be comparing against the latest version of the base branch, as you said.

[jackton1]

Yes that's correct