Pipeline
    借助GitHub Actions:

    1. 同步镜像并生成镜像映射文件（json）:
    2. 收集镜像映射文件为制品；

    This is a basic workflow to help you get started with Actions
    name: Get Tekton Images
    env:
    VERSION: v0.29.0
    on:
    push:
    paths:
    - ‘.github/workflows/tekton.yaml’
    - ‘tekton/**’

    jobs:
    build:
    runs-on: ubuntu-18.04
    steps:
    - uses: actions/checkout@v2
    - name: build
    run: |

    curl https://storage.googleapis.com/tekton-releases/pipeline/previous/${{ env.VERSION }}/release.yaml -o release.yaml
    grep -v “#” release.yaml | grep -v “^$” > release1.yaml ; sed -i ‘s/---/###/g’ release1.yaml
    python3 tekton/get_tekton_images.py ${{ secrets.DOCKER_USER}} ${{ secrets.DOCKER_PASSWD}}
    - uses: actions/upload-artifact@v2
    with:
    name: ${{ env.VERSION }}-tekton-images
    path: tekton_images.json