Bump digest for chainguard image

Chainguard only allows the :latest and :latest-dev tags for their images (announcement). Older verions must be referenced by digests (@sha256:...). Use this action to setup nightly github actions that bump chainguard images to the newest digests.

use the action

example for nightly job:

name: Bump redis image

on:
  schedule:
    - cron: "0 0 * * *"
  workflow_dispatch:

permissions:
  contents: write

jobs:
  bump-chainguard-images:
    runs-on: ubuntu-latest
    steps:
      - name: bump redis image
        uses: digitalservicebund/bump-chainguard-digest@LATEST_HASH
        with:
          image_name: redis
          file_path: manifests/base/redis-deployment.yaml
          github_token: ${{ github.token }}

inputs:

input	info
image_name	name of the image to check for (e.g. nginx)
file_path	path to the file where the image is located (e.g frontend/Dockerfile)
github_token	required for using the github api to make commits (steps inside composite github actions cannot directly access the secrets context).

Note

Triggering another github workflow (e.g. a build pipeline) does not work automatically via the push trigger. You'll need to trigger the workflow manually.