# Builds the image and pushes it. It does not deploy.
#
# What picks it up is a timer on the server (see `deploy/`), so nothing here
# holds a credential for the machine it runs on and a bad build cannot take the
# service down by itself. The trade is that a deploy happens a few minutes
# after the push rather than at the moment of it.

name: Image

on:
  push:
    branches:
      - main

jobs:
  image:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

      - uses: docker/setup-buildx-action@v3

      - uses: docker/login-action@v3
        with:
          registry: ${{ vars.REGISTRY }}
          username: ${{ vars.USERNAME }}
          password: ${{ secrets.DOCKER_PASSWORD }}

      # Tagged with the commit as well as `latest`, so that "what is actually
      # running" has an answer, and so a rollback is a tag rather than a revert
      # and a rebuild.
      - uses: docker/build-push-action@v5
        with:
          context: .
          file: ./Dockerfile
          push: true
          tags: |
            ${{ vars.REGISTRY }}/connor/news:latest
            ${{ vars.REGISTRY }}/connor/news:${{ github.sha }}
          cache-from: type=gha
          cache-to: type=gha,mode=max