name: Build Astro Image

on:
  push:
    branches: [ "master" ]

jobs:
  build:
    runs-on: ubuntu-latest

    steps:
      - name: Checkout code
        uses: actions/checkout@v4

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      - name: Get Short SHA
        id: vars
        run: echo "sha_short=$(git rev-parse --short HEAD)" >> $GITHUB_OUTPUT

      - name: Build and Export to Docker
        uses: docker/build-push-action@v5
        with:
          context: .
          load: false 
          tags: |
            astro:latest
            astro:${{ steps.vars.outputs.sha_short }}
          outputs: type=docker,dest=/tmp/astro-image.tar

      - name: Upload Artifact
        uses: actions/upload-artifact@v4
        with:
          name: astro-docker-${{ steps.vars.outputs.sha_short }}
          path: /tmp/astro-image.tar
          retention-days: 7