name: Build and Push Docker Image

on:
  push:
    branches:
      - master
      - main
  pull_request:
    branches:
      - master
      - main

jobs:
  build:
    runs-on: ubuntu-latest

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

      - name: Read package.json version
        id: package-version
        run: |
          VERSION=$(node -p "require('./package.json').version")
          echo "version=$VERSION" >> $GITHUB_OUTPUT
          echo "Building version: $VERSION"

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

      - name: Login to Registry
        # Gitea automatically provides these secrets:
        # - `vars.REGISTRY_USERNAME` - defined as action variable in repo settings
        # - `secrets.REGISTRY_TOKEN` - defined as action secret in repo settings, created in user settings as personal access token with `write:packages` scope
        run: |
          echo "${{ secrets.REGISTRY_TOKEN }}" | docker login registry.budakova.org -u "${{ vars.REGISTRY_USERNAME }}" --password-stdin

      - name: Build and push Docker image
        uses: docker/build-push-action@v5
        with:
          context: .
          push: true
          tags: |
            registry.budakova.org/knee-cola/gitea-actions-demo-project:${{ steps.package-version.outputs.version }}
            registry.budakova.org/knee-cola/gitea-actions-demo-project:latest
          cache-from: type=registry,ref=registry.budakova.org/knee-cola/gitea-actions-demo-project:buildcache
          cache-to: type=registry,ref=registry.budakova.org/knee-cola/gitea-actions-demo-project:buildcache,mode=max