[BUG] Changes are retrieved for everything since initial commit, instead of the current context like the GitHub UI

[hayescode]

Is there an existing issue for this?

• I have searched the existing issues

Does this issue exist in the latest version?

• I'm using the latest release

Describe the bug?

I have an Action configured that runs when a PR is merged into Main. If my PR (1) was submitted before another PR (2), and the other PR (2) is merged 1st, this github action returns the changes from both PRs (1 and 2). I only want the changes from the PR that is running that action (1 in this example).

      - name: Get changed files
        id: changed-files
        uses: tj-actions/changed-files@v35.4.1
        with:
          separator: ","
          quotepath: true

I would expect to see these files in the Action but instead, I see considerably more, with no apparent way to differentiate which changes originated from where so that I could filter them out.

To Reproduce

1. Submit PR 1
2. Submit PR 2
3. Merge # into main branch
4. Run changed-files on PR 1
5. File changes from both 1 and 2 are included

What OS are you seeing the problem on?

ubuntu-latest or ubuntu-20.04

Expected behavior?

Only the changed files in the PR are pulled in. Like how the GitHub UI does it.

Relevant log output

Every file is change is pulled

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]

@hayescode I’ll recommend upgrading to the latest version, let me know if the issue persists and I’ll reopen this issue

[hayescode]

@jackton1 it's also happening on 35.5.5. Do I need to pull origin before running this action or something? It doesn't happen every time which make me think it's a bug.

[jackton1]

@hayescode Given the lack of context, I’ll suggest creating a public repository the replicates the issue you are seeing.