container-build-publishing.yml

name: Check Tag & Build

# This workflow uses actions that are not certified by GitHub.
# They are provided by a third-party and are governed by
# separate terms of service, privacy policy, and support
# documentation.

on:
  schedule:
    - cron: '0 * * * *'  # 每小时检查一次
  push:
    branches:
      - main  # 选择你想要的分支

env:
  # Use docker.io for Docker Hub if empty
  REGISTRY: ghcr.io
  # github.repository as <account>/<repo>
  IMAGE_NAME: ${{ github.repository }}


jobs:
  check-tag:
    runs-on: ubuntu-latest
    outputs:
        trigger: ${{ steps.if_new_tag.outputs.new_tag }}
    steps:
      - name: Checkout This Repository
        uses: actions/checkout@v4
      
      - name: Set up Git
        run: |
          git config --global user.name 'github-actions[bot]'
          git config --global user.email 'github-actions[bot]@users.noreply.github.com'
      
      - name: Check Latest Tag from Upstream
        id: check_tag
        run: |
          UPSTREAM_LATEST_TAG=$(npm show musicn version | head -n 1)
          echo "Latest upstream tag: $UPSTREAM_LATEST_TAG"
          echo "latest_tag=$UPSTREAM_LATEST_TAG" >> $GITHUB_ENV
          
      - name: Check Last Processed Tag
        id: check_last_tag
        run: |
          if [ -f .last_upstream_tag ]; then
            LAST_PROCESSED_TAG=$(cat .last_upstream_tag)
            echo "Last processed tag: $LAST_PROCESSED_TAG"
          else
            LAST_PROCESSED_TAG="none"
            echo "No last processed tag found."
          fi
          echo "last_tag=$LAST_PROCESSED_TAG" >> $GITHUB_ENV

      - name: Compare Tags
        id: if_new_tag
        if: ${{ env.latest_tag != env.last_tag }}
        run: |
          echo "New tag detected: ${latest_tag}"
          echo "new_tag=true" >> "$GITHUB_OUTPUT"

      - name: Save Last Processed Tag
        if: ${{ env.latest_tag != env.last_tag }}
        run: echo ${latest_tag} > .last_upstream_tag

      - name: Commit and Push Last Processed Tag
        if: ${{ env.latest_tag != env.last_tag }}
        run: |
          git add .last_upstream_tag
          git commit -m "Update last processed upstream tag to ${latest_tag}"
          git push


  build:
    needs: check-tag
    runs-on: ubuntu-latest
    if: needs.check-tag.outputs.trigger == 'true'
    permissions:
      contents: read
      packages: write
      # This is used to complete the identity challenge
      # with sigstore/fulcio when running outside of PRs.
      id-token: write

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

      - name: Setup Node.js
        uses: actions/setup-node@v4
        with:
          node-version: 'latest'

      - name: Get Latest Tag from Upstream
        id: get_tag
        run: |
          UPSTREAM_LATEST_TAG=$(npm show musicn version | head -n 1)
          echo "Latest upstream tag: $UPSTREAM_LATEST_TAG"
          echo "latest_tag=$UPSTREAM_LATEST_TAG" >> $GITHUB_ENV

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v3
        with:
          platforms: all

      - name: Setup Docker buildx
        uses: docker/setup-buildx-action@v3

      # Login against a Docker registry except on PR
      # https://github.com/docker/login-action
      - name: Log into registry ${{ env.REGISTRY }}
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v3
        with:
          registry: ${{ env.REGISTRY }}
          username: ${{ github.actor }}
          password: ${{ secrets.GITHUB_TOKEN }}

      # Extract metadata (tags, labels) for Docker
      # https://github.com/docker/metadata-action
      - name: Extract Docker metadata
        id: meta
        uses: docker/metadata-action@v5
        with:
          images: ${{ env.REGISTRY }}/${{ env.IMAGE_NAME }}
          flavor: |
            latest=true
          tags: |
            type=raw,value=${{ env.latest_tag }}

      # Build and push Docker image with Buildx (don't push on PR)
      # https://github.com/docker/build-push-action
      - name: Build and push Docker image
        id: build-and-push
        uses: docker/build-push-action@v6
        with:
          builder: ${{ steps.buildx.outputs.name }}
          context: .
          platforms: linux/amd64,linux/arm64
          push: true
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}