auto-docker-build.yml

name: Build and Push Docker Image

on:
  push:
    branches:
      - main 
    tags:
      - 'v*'
  pull_request:
    branches:
      - main
  workflow_dispatch:

env:
  REGISTRY: docker.io
  IMAGE_NAME: ${{ secrets.DOCKER_USERNAME }}/fixit 

jobs:
  build:
    runs-on: ubuntu-latest
    permissions:
      contents: read
      packages: write

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

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

      - name: Log in to Docker Hub
        uses: docker/login-action@v3
        with:
          username: ${{ secrets.DOCKER_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      - name: Extract metadata (tags, labels)
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.IMAGE_NAME }}
          tags: |
            type=ref,event=branch   # 分支名 -> branch-main
            type=ref,event=pr       # PR 编号 -> pr-123
            type=semver,pattern={{version}}   # 标签 v1.2.3 -> 1.2.3
            type=semver,pattern={{major}}.{{minor}}  # 1.2
            type=semver,pattern={{major}}      # 1
            type=sha,format=short   # git 短 commit sha
            type=raw,value=latest,enable={{is_default_branch}}  # main 分支推送时也打 latest 标签

      - name: Build and push Docker image
        uses: docker/build-push-action@v5
        with:
          context: .
          file: ./Dockerfile   # 确保文件名正确
          push: ${{ github.event_name != 'pull_request' }}   # PR 时不推送
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          platforms: linux/amd64,linux/arm64   # 可选：支持多架构
          cache-from: type=gha
          cache-to: type=gha,mode=max