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Manage tags and labels with GitHub Actions

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---

If you want an "automatic" tag management and OCI Image Format Specification for labels, you can do it in a dedicated setup step. The following workflow will use the Docker Metadata Action to handle tags and labels based on GitHub Actions events and Git metadata:

name: ci

on:
  schedule:
    - cron: "0 10 * * *"
  push:
    branches:
      - "**"
    tags:
      - "v*.*.*"
  pull_request:

jobs:
  docker:
    runs-on: ubuntu-latest
    steps:
      - name: Docker meta
        id: meta
        uses: docker/metadata-action@v6
        with:
          # list of Docker images to use as base name for tags
          images: |
            name/app
            ghcr.io/username/app
          # generate Docker tags based on the following events/attributes
          tags: |
            type=schedule
            type=ref,event=branch
            type=ref,event=pr
            type=semver,pattern={{version}}
            type=semver,pattern={{major}}.{{minor}}
            type=semver,pattern={{major}}
            type=sha

      - name: Login to Docker Hub
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v4
        with:
          username: ${{ vars.DOCKERHUB_USERNAME }}
          password: ${{ secrets.DOCKERHUB_TOKEN }}

      - name: Login to GHCR
        if: github.event_name != 'pull_request'
        uses: docker/login-action@v4
        with:
          registry: ghcr.io
          username: ${{ github.repository_owner }}
          password: ${{ secrets.GITHUB_TOKEN }}

      - name: Set up QEMU
        uses: docker/setup-qemu-action@v4

      - name: Set up Docker Buildx
        uses: docker/setup-buildx-action@v4

      - name: Build and push
        uses: docker/build-push-action@v7
        with:
          push: ${{ github.event_name != 'pull_request' }}
          tags: ${{ steps.meta.outputs.tags }}
          labels: ${{ steps.meta.outputs.labels }}