# 工作流名称
name: Build Docker Image

# push tag 时触发执行
on:
  push:
    tags:
      - v*

# 定义环境变量, 后面会使用
# 定义 APP_NAME 用于 docker build-args
# 定义 DOCKERHUB_REPO 标记 docker hub repo 名称
env:
  APP_NAME: pairdrop
  DOCKERHUB_REPO: sage417/pairdrop

jobs:
  main:
    # 在 Ubuntu 上运行
    runs-on: ubuntu-latest
    steps:
      # git checkout 代码
      - name: Checkout
        uses: actions/checkout@v4
      # 设置 QEMU, 后面 docker buildx 依赖此.
      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3
      # 设置 Docker buildx, 方便构建 Multi platform 镜像
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3
      # 登录 docker hub
      - name: Login to DockerHub
        uses: docker/login-action@v1
        with:
          # GitHub Repo => Settings => Secrets 增加 docker hub 登录密钥信息
          # DOCKERHUB_USERNAME 是 docker hub 账号名.
          # DOCKERHUB_TOKEN: docker hub => Account Setting => Security 创建.
          username: ${{ secrets.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}
      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@31cebacef4805868f9ce9a0cb03ee36c32df2ac4 # v5.3.0
        with:
          images: ${{ env.DOCKERHUB_REPO }}
      # 构建 Docker 并推送到 Docker hub
      - name: Build and push
        id: docker_build
        uses: docker/build-push-action@v5
        with:
          # 是否 docker push
          push: true
          # 生成多平台镜像, see https://github.com/docker-library/bashbrew/blob/v0.1.1/architecture/oci-platform.go
          platforms: |
            linux/arm64/v8
          # docker build arg, 注入 APP_NAME/APP_VERSION
          build-args: |
            APP_NAME=${{ env.APP_NAME }}
            APP_VERSION=${{ env.APP_VERSION }}
          # 生成两个 docker tag: ${APP_VERSION} 和 latest
          tags: |
            ${{ env.DOCKERHUB_REPO }}:latest
            ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}