GitHub Action for showing diff of kustomized ArgoCD Application

kustdiff.yaml

name: Show kustomized Application diff
on:
  pull_request:
    paths:
      - '**.yaml'
      - '**.yml'

jobs:
  enumerate:
    name: Enumerate ArgoCD Applications
    runs-on: ubuntu-latest
    outputs:
      applications: ${{ steps.jqlist.outputs.result }}
    steps:
    - uses: actions/checkout@v2
    - name: collect applications
      id: jqlist
      uses: mikefarah/yq@master
      with:
        cmd: find applications -name '*.yml' -or -name '*.yaml' | xargs  yq ea -o=json  -N '[.spec.source.path]'
    
  kustomize-diff:
    name: Generate kustomized Diff
    needs: enumerate
    runs-on: ubuntu-latest
    strategy:
      fail-fast: false
      matrix:
        applications: ${{ fromJson(needs.enumerate.outputs.applications) }}
    steps:
      - id: checkout
        uses: actions/checkout@v2
        with:
          fetch-depth: 0
      - id: kustomize-diff
        uses: walkure/github-action-kustomize-diff@master
        with:
          envpath_pattern: ${{matrix.applications}}
      - id: comment
        if: steps.kustomize-diff.outputs.diff != 'No Difference'
        uses: thollander/actions-comment-pull-request@v2
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
        with:
          message: ${{ steps.kustomize-diff.outputs.diff }}
          comment_tag: kustdiff-${{matrix.applications}}