ci.yml

name: Build Docker image

on:
  push:
  pull_request:

jobs:
  ci:
    name: Build
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4

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

      - name: Log in to Docker Hub
        if: github.ref == 'refs/heads/master' || github.ref == 'refs/heads/next'
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      - name: Extract tags
        shell: bash
        run: |
          branch_name=${GITHUB_REF#refs/heads/}
          tags=henrist/zerotier-one
          if [ "$branch_name" = "master" ]; then
            major_minor=$(grep ZEROTIER_VERSION= Dockerfile | sed -r 's/.+=([0-9]+\.[0-9]+)\..+/\1/')
            tags=henrist/zerotier-one:latest,henrist/zerotier-one:$major_minor
          elif [ "$branch_name" = "next" ]; then
            tags=henrist/zerotier-one:next
          fi
          echo "##[set-output name=tags;]$(echo "$tags")"
        id: extract_tags

      - name: Build Docker image
        uses: docker/build-push-action@v5
        with:
          context: .
          push: ${{ github.ref == 'refs/heads/master' || github.ref == 'refs/heads/next' }}
          tags: ${{ steps.extract_tags.outputs.tags }}
          cache-from: type=gha
          cache-to: type=gha,mode=max