CreateDevcontainerImage.yml

name: Create and publish devcontainer Docker image

on:
  push:
    paths:
      - ".devcontainer/Dockerfile"
      - ".github/workflows/CreateDevcontainerImage.yml"

# Defines two custom environment variables for the workflow. These are used for the Container registry domain, and a name for the Docker image that this workflow builds.
env:
  REGISTRY: ghcr.io
  IMAGE_NAME: ${{ github.repository }}-devcontainer
  USER: vscode
  GROUP: vscode
  RUST_TOOLCHAIN: 1.81.0

# There is a single job in this workflow. It's configured to run on the latest available version of Ubuntu.
jobs:
  build-and-push-image:
    runs-on: ubuntu-latest
    # Sets the permissions granted to the `GITHUB_TOKEN` for the actions in this job.
    permissions:
      contents: read
      packages: write
      attestations: write
      id-token: write

    steps:
      - name: Checkout repository
        uses: actions/checkout@v3
      # Uses the `docker/login-action` action to log in to the Container registry registry using the account and password that will publish the packages. Once published, the packages are scoped to the account defined here.
      - name: Log in to the Container registry
        uses: docker/login-action@v1
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}

      - name: Build and push Docker image
        id: push
        uses: docker/build-push-action@v6
        with:
          context: ./.devcontainer
          push: true
          tags: |
            ${{ steps.meta.outputs.tags }}
            ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}:latest
          labels: ${{ steps.meta.outputs.labels }}
          build-args: |
            USER=${{ env.USER }}
            GROUP=${{ env.GROUP }}
            RUST_TOOLCHAIN=${{ env.RUST_TOOLCHAIN }}