name: "docker-build"

on:
  workflow_dispatch:
  push:
    branches:
      - "master"
    tags:
      - "v*"
  pull_request:
    branches:
      - "master"

jobs:
  build:
    name: "Build"
    runs-on: ubuntu-latest
    env:
      IMAGE_NAME: ${{ github.repository }}
    steps:
      - name: Log in to GitHub Packages
        uses: docker/login-action@v2
        with:
          registry: ghcr.io
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Checkout repo
        uses: actions/checkout@v2

      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@v4
        with:
          images: | 
            ghcr.io/${{ env.IMAGE_NAME }}

      - name: Build and push Docker image
        uses: docker/build-push-action@v3
        with:
          context: .
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}