check-devcontainer.yml

name: check-devcontainer
on:
  # No need to run on main, because prebuild will trigger itself.
  pull_request:
  workflow_dispatch: 

# https://how.wtf/run-workflow-step-or-job-based-on-file-changes-github-actions.html
jobs:
  check-devcontainer-changed:
    runs-on: ubuntu-latest
    outputs:
      devcontainer: ${{ steps.changes.outputs.devcontainer }}
      docker: ${{ steps.changes.outputs.docker }}
      scripts: ${{ steps.changes.outputs.scripts }}
    steps:
      - uses: actions/checkout@v3
      - uses: dorny/paths-filter@v2
        id: changes
        with:
          filters: |
            devcontainer:
              - '.devcontainer/**'
            docker:
              - 'utils/dockerfiles/**'
            scripts:
              - 'utils/scripts/**'

  build-devcontainer:
    needs: check-devcontainer-changed
    if: ${{ needs.changes.outputs.devcontainer == 'true' || needs.changes.outputs.docker == 'true' || needs.changes.outputs.scripts == 'true' }}
    runs-on: ubuntu-latest
    steps:
      - name: Checkout (GitHub)
        uses: actions/checkout@v3
      - name: make log
        run: |
          mkdir -p /home/runner/logs
      # See the mount section. This is a very bad and weird hack as of now.
      - name: Edit devcontainer.json to let it mount correctly.
        run: |
          sed --in-place 's/\/\/ REMOVE-BY-CI //' .devcontainer/devcontainer.json
          cat .devcontainer/devcontainer.json
      - uses: devcontainers/ci@v0.3
        with:
          runCmd: lfc --version
      - name: Show failure reason
        if: failure()
        run: |
          echo "Failure reason:"
          cat /home/runner/logs/*.log