name: "Set custom docker config directory"
description: "Create a directory for docker config and set DOCKER_CONFIG"

# Use custom DOCKER_CONFIG directory to avoid conflicts with default settings
runs:
  using: "composite"
  steps:
  - name: Show warning on GitHub-hosted runners
    if: runner.environment == 'github-hosted'
    shell: bash -euo pipefail {0}
    run: |
      # Using the following environment variables to find a path to the workflow file
      # ${GITHUB_WORKFLOW_REF} - octocat/hello-world/.github/workflows/my-workflow.yml@refs/heads/my_branch
      # ${GITHUB_REPOSITORY}   - octocat/hello-world
      # ${GITHUB_REF}          - refs/heads/my_branch
      # From https://docs.github.com/en/actions/writing-workflows/choosing-what-your-workflow-does/variables

      filename_with_ref=${GITHUB_WORKFLOW_REF#"$GITHUB_REPOSITORY/"}
      filename=${filename_with_ref%"@$GITHUB_REF"}

      # https://docs.github.com/en/actions/writing-workflows/choosing-what-your-workflow-does/workflow-commands-for-github-actions#setting-a-warning-message
      title='Unnecessary usage of `.github/actions/set-docker-config-dir`'
      message='No need to use `.github/actions/set-docker-config-dir` action on GitHub-hosted runners'
      echo "::warning file=${filename},title=${title}::${message}"

  - uses: pyTooling/Actions/with-post-step@74afc5a42a17a046c90c68cb5cfa627e5c6c5b6b # v1.0.7
    env:
      DOCKER_CONFIG: .docker-custom-${{ github.run_id }}-${{ github.run_attempt }}
    with:
      main: |
        mkdir -p "${DOCKER_CONFIG}"
        echo DOCKER_CONFIG=${DOCKER_CONFIG} | tee -a $GITHUB_ENV
      post: |
        if [ -d "${DOCKER_CONFIG}" ]; then
          rm -r "${DOCKER_CONFIG}"
        fi