name: build-android-builder-image

# Builds the Android toolchain image and pushes it to the Gitea registry.
# Push a tag like `2026.06` to cut an immutable toolchain; pushes to main
# refresh the moving `latest` tag.
on:
  push:
    branches: [main]
    tags: ["*"]
  workflow_dispatch:

env:
  REGISTRY: git.helu.ca
  IMAGE: git.helu.ca/r/android

jobs:
  build-image:
    runs-on: ubuntu-24.04-arm64
    steps:
      - name: Checkout
        uses: actions/checkout@v4

      # Determine which tags to push:
      #  - a git tag  -> use it verbatim (e.g. 2026.06) + latest
      #  - main branch -> latest only
      - name: Compute tags
        id: tags
        run: |
          if [ "${{ gitea.ref_type }}" = "tag" ]; then
            REF="${{ gitea.ref_name }}"
            echo "tags=${IMAGE}:${REF},${IMAGE}:latest" >> "$GITHUB_OUTPUT"
          else
            echo "tags=${IMAGE}:latest" >> "$GITHUB_OUTPUT"
          fi

      - name: Log in to Gitea registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ gitea.actor }}
          password: ${{ secrets.PACKAGE_TOKEN }}

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

      - name: Build and push (linux/arm64)
        uses: docker/build-push-action@v6
        with:
          context: .
          file: ./Dockerfile
          platforms: linux/arm64
          push: true
          tags: ${{ steps.tags.outputs.tags }}
          # Bump these here if you want to override the Dockerfile defaults
          # build-args: |
          #   BUILD_TOOLS_VERSION=35.0.0
          #   PLATFORM_VERSION=android-35