argocd-diff.yaml

name: Argo CD Diff Preview

on:
  pull_request:
    paths:
      - 'kubernetes/**' # All Kubernetes manifests owned by ArgoCD live here
    branches:
      - main

jobs:
  build:
    runs-on: ubuntu-latest
    steps:
      - uses: actions/checkout@v4
        with:
          path: pull-request

      - uses: actions/checkout@v4
        with:
          ref: main
          path: main

      - name: Generate Diff
        run: |
          docker run \
            --network=host \
            -v /var/run/docker.sock:/var/run/docker.sock \
            -v $(pwd)/main:/base-branch \
            -v $(pwd)/pull-request:/target-branch \
            -v $(pwd)/output:/output \
            -e TARGET_BRANCH=refs/pull/${{ github.event.number }}/merge \
            -e REPO=${{ github.repository }} \
            dagandersen/argocd-diff-preview:v0.1.19

      - name: Post diff as comment
        env:
          GH_TOKEN: ${{ secrets.K8S_INFRA_CI_BOT_PR_TOKEN }}
        run: |
          gh pr comment ${{ github.event.number }} --repo ${{ github.repository }} --body-file output/diff.md --edit-last || \
          gh pr comment ${{ github.event.number }} --repo ${{ github.repository }} --body-file output/diff.md