ci: notify gateway when template assets change (#166)

Author: antidmg

.github/workflows/notify-gateway-template-assets-update.yml

@@ -0,0 +1,48 @@
+name: Notify gateway of template asset updates
+
+on:
+  push:
+    branches:
+      - main
+    paths:
+      - 'examples/**'
+      - '.github/workflows/notify-gateway-template-assets-update.yml'
+  workflow_dispatch:
+    inputs:
+      statespace_sha:
+        description: Optional statespace commit SHA to publish from (defaults to current commit)
+        required: false
+        type: string
+
+permissions: {}
+
+jobs:
+  dispatch-gateway:
+    name: Dispatch template update to gateway
+    runs-on: blacksmith-4vcpu-ubuntu-2204
+    steps:
+      - name: Resolve statespace commit SHA
+        id: sha
+        run: |
+          set -euo pipefail
+
+          target_sha="${{ github.event.inputs.statespace_sha }}"
+          if [[ -z "${target_sha}" ]]; then
+            target_sha="${{ github.sha }}"
+          fi
+
+          if [[ ! "$target_sha" =~ ^[0-9a-f]{40}$ ]]; then
+            echo "::error::statespace_sha must be a full 40-character commit SHA"
+            exit 1
+          fi
+
+          echo "value=$target_sha" >> "$GITHUB_OUTPUT"
+
+      - name: Send repository_dispatch event to gateway
+        uses: peter-evans/repository-dispatch@ff45666b9427631e3450c54a1bcbee4d9ff4d7c0
+        with:
+          token: ${{ secrets.GATEWAY_REPO_DISPATCH_TOKEN }}
+          repository: statespace-tech/gateway
+          event-type: statespace-template-assets-updated
+          client-payload: >-
+            {"statespace_sha":"${{ steps.sha.outputs.value }}","statespace_ref":"${{ github.ref_name }}","source_run_id":"${{ github.run_id }}"}