feat: initial composite action

Co-Authored-By: Claude Opus 4.7 (1M context) <noreply@anthropic.com>
2026-05-23 22:37:57 +02:00
commit a174f823f3
2 changed files with 151 additions and 0 deletions
@@ -0,0 +1,62 @@
+name: notify-image-updater
+description: |
+  POSTs a CloudEvents v1.0 envelope to the in-cluster argocd-image-updater
+  webhook so the controller reconciles the matching ImageUpdater CR
+  immediately instead of waiting for the next 30s poll. Pair this with the
+  docker/build-push-action step that publishes the image.
+
+inputs:
+  image:
+    description: 'Fully-prefixed image repository, e.g. git.aceofba.se/<owner>/<repo>.'
+    required: true
+  tag:
+    description: 'Tag that was just pushed.'
+    required: true
+  digest:
+    description: 'Image digest from docker/build-push-action (steps.<id>.outputs.digest).'
+    required: true
+  secret:
+    description: 'CloudEvents shared secret. Defaults to the IMAGE_UPDATER_WEBHOOK_SECRET repo/org secret.'
+    required: false
+    default: ${{ env.IMAGE_UPDATER_WEBHOOK_SECRET }}
+  webhook-url:
+    description: 'Webhook endpoint. Override only when running against a non-default cluster.'
+    required: false
+    default: 'http://argocd-image-updater.argocd.svc.cluster.local:8080/webhook'
+
+runs:
+  using: composite
+  steps:
+    - name: Notify argocd-image-updater
+      shell: bash
+      env:
+        WEBHOOK_URL: ${{ inputs.webhook-url }}
+        WEBHOOK_SECRET: ${{ inputs.secret }}
+        IMAGE: ${{ inputs.image }}
+        TAG: ${{ inputs.tag }}
+        DIGEST: ${{ inputs.digest }}
+      run: |
+        set -euo pipefail
+        if [[ -z "${WEBHOOK_SECRET}" ]]; then
+          echo "::error::IMAGE_UPDATER_WEBHOOK_SECRET is empty. Set it as a repo/org secret or pass 'secret:' to this action." >&2
+          exit 1
+        fi
+        curl -fsS -X POST \
+          "${WEBHOOK_URL}?type=cloudevents&secret=${WEBHOOK_SECRET}" \
+          -H 'Content-Type: application/json' \
+          -d @- <<EOF
+        {
+          "specversion": "1.0",
+          "id": "${GITHUB_RUN_ID:-$(date +%s)}-${GITHUB_RUN_ATTEMPT:-1}",
+          "type": "image.push",
+          "source": "git.aceofba.se",
+          "subject": "${IMAGE}:${TAG}",
+          "datacontenttype": "application/json",
+          "data": {
+            "repositoryName": "${IMAGE}",
+            "imageTag": "${TAG}",
+            "imageDigest": "${DIGEST}"
+          }
+        }
+        EOF
+        echo "Notified argocd-image-updater: ${IMAGE}:${TAG} (${DIGEST})"