name: Release
# A published release builds the agent's image and pushes it to Gitea's
# registry (Development Plan M1.5, X4): gitea.dongar.net/dongar/nisse-dev
# tagged with the version (the release tag without its v) and latest. Cut a
# release in Gitea (Releases → New release, tag vX.Y.Z); a tag pushed for any
# other reason builds nothing.
#
# The registry needs a personal access token with write:package
# (REGISTRY_TOKEN), never the built-in job token: Gitea's registry resolves
# an Actions job token to an empty package scope (go-gitea/gitea#23642 and
# others). Packages belong to the repository's owner. Never on pull_request:
# registry credentials stay off that trigger.
on:
  release:
    types: [published]

env:
  REGISTRY: gitea.dongar.net
  REGISTRY_USER: dongar  # the token's account
  IMAGE: gitea.dongar.net/dongar/nisse-dev

jobs:
  build-and-push:
    runs-on: ubuntu-latest
    permissions:
      contents: read
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      - name: Derive the image version from the release's tag
        id: vars
        env:
          TAG: ${{ github.event.release.tag_name }}
        run: echo "version=${TAG#v}" >> "$GITHUB_OUTPUT"

      - name: Log in to Gitea's container registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ env.REGISTRY_USER }}
          password: ${{ secrets.REGISTRY_TOKEN }}

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

      - name: Build and push the agent
        uses: docker/build-push-action@v5
        with:
          context: .
          target: agent
          push: true
          build-args: |
            VERSION=${{ steps.vars.outputs.version }}
          labels: |
            org.opencontainers.image.version=${{ steps.vars.outputs.version }}
            org.opencontainers.image.revision=${{ github.sha }}
          tags: |
            ${{ env.IMAGE }}:${{ steps.vars.outputs.version }}
            ${{ env.IMAGE }}:latest