How to use an action in the same repo when the step is running in a container?

[shink]

Relevant issues:

• github.action_path contains wrong path when used inside a container #2185
• github.workspace and runner.workspace are incorrect inside container jobs #2058
• GITHUB_WORKSPACE and github.workspace are different when running in container checkout#785

Describe the bug

As the title stated, how to use an action in the same repo when the step is running in a container?

To Reproduce

Here is a minimal repro:

Repository file structure:

|-- hello-world (repository)
|   |__ .github
|       └── workflows
|           └── main-workflow.yml
|           └── sub-workflow.yml
|       └── actions
|           |__ hello-world-action
|               └── action.yml

main-workflow.yml:

jobs:
  main-job:
    uses: ./.github/workflows/sub-workflow.yml

sub-workflow.yml, which is a reusable workflow:

jobs:
  sub-job:
    runs-on: ${{ inputs.runner }}
    container:
      image: ${{ inputs.image }}
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Hello world
         uses: ./.github/actions/hello-world-action

Expected behavior

I expect that the hello-world action can be used correctly, but actually, It seems that GITHUB_WORKSPACE and github.workspace are different, and GitHub Actions tries to find my action in github.workspace.

The doc says:

The path is relative (./) to the default working directory (github.workspace, $GITHUB_WORKSPACE).

Runner Version and Platform

self-hosted runner

What's not working?

https://github.com/cosdt/pytorch-integration-tests/actions/runs/12295364230

Job Log Output

https://github.com/cosdt/pytorch-integration-tests/actions/runs/12295364230

Runner and Worker's Diagnostic Logs