publish-devcontainer.yml

name: Build and Push Dev Container Image

on:
  push:
    branches:
      - main
    paths:
      - '.devcontainer/**' # 只有当 devcontainer 目录变化时才触发
  
  # 新增: 允许手动触发，方便你强制重构
  workflow_dispatch:

  # 新增: 每周自动构建一次，确保能够获取 gitgit188/gomtm 的最新更新
  # 因为如果你的基础镜像更新了，而你的 Dockerfile 没变，不加这个就不会触发构建
  schedule:
    - cron: '0 0 * * 1' # 每周一运行

# 新增: 并发控制
# 如果你连续提交了3次代码，这个配置会自动取消前2次正在运行的构建，只保留最新的
concurrency:
  group: ${{ github.workflow }}-${{ github.ref }}
  cancel-in-progress: true

env:
  REGISTRY: ghcr.io
  # 动态获取当前仓库名称，支持 Fork 后自动适配 (例如 user/dev)
  IMAGE_NAME: ${{ github.repository }}

jobs:
  build-and-push:
    runs-on: ubuntu-latest
    
    # 必要的权限设置
    permissions:
      contents: read
      packages: write # 允许推送到 GHCR

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

      # 1. 设置 Docker Buildx (这是使用缓存的高级特性的前提)
      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v3

      # 2. 登录 GitHub Container Registry
      - name: Log in to the Container registry
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      # 3. 提取元数据 (自动处理 tags 和 labels)
      - name: Extract metadata (tags, labels) for Docker
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          tags: |
            type=raw,value=latest
            type=sha,format=long
            type=schedule,pattern={{date 'YYYYMMDD'}}

      # 4. 构建并推送 (核心优化部分)
      - name: Build and push Docker image
        uses: docker/build-push-action@v5
        with:
          context: .devcontainer
          file: .devcontainer/Dockerfile
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}
          # 开启 GitHub Actions 缓存 (极大提升二次构建速度)
          cache-from: type=gha
          cache-to: type=gha,mode=max
          # 确保构建时能拉取到最新的基础镜像
          pull: true