This GitHub Action checks for updates in the specified directory of YAML files. It's written in Go and uses the "sigs.k8s.io/yaml" package to parse YAML files and the github.com/sethvargo/go-githubactions package for GitHub Actions specific functionalities.

The action walks through the specified directory and its subdirectories, looking for YAML files. For each YAML file, it reads the file and unmarshals the content into an Application manifest.

The action then checks if the chart, url, and targetRevision fields are present. If they are, it sends a GET request to the URL (RepoURL) and unmarshals the response getting the new chart versions.

The action supports both Helm chart repositories and OCI registries. For OCI registries, it uses the oras.land/oras-go package to interact with the registry. Please note that currently only public repositories are supported.

The action then checks if there is a new release and opens PR with the updates if there is.

Example GitHub workflow:

name: "ArgoCD App Updates"

on:
  schedule:
    - cron:  '0 7 * * MON'
  workflow_dispatch:

jobs:

  update:
    runs-on: ubuntu-latest
    permissions:
        contents: write
        pull-requests: write
    steps:

      - name: Check out
        uses: actions/checkout@v4
        with:
          fetch-depth: '0'

      - name: Check updates for ArgoCD Apps
        uses: ironashram/argocd-apps-action@v1.1.0
        with:
          target_branch: main
          create_pr: true
          apps_folder: apps/manifests
        env:
          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}

Please ensure that you have allowed GitHub Actions to create and approve pull requests. This is necessary for the correct operation of the action.

You can enable this setting in your repository's settings under the Actions tab. If your repository is part of an organization, you might need to check the organization's settings or contact your organization's owner for help.