ci: add cascading notification support

.github/workflows/ci.yml

@@ -5,6 +5,8 @@ on:
     branches: [main]
   pull_request:
     branches: [main]
+  repository_dispatch:
+    types: [dependency-updated]
 
 env:
   CARGO_TERM_COLOR: always

.github/workflows/notify-parent.yml

@@ -0,0 +1,72 @@
+name: Notify Parent Repo
+
+on:
+  push:
+    branches: [main]
+  repository_dispatch:
+    types: [dependency-updated]
+
+jobs:
+  wait-for-ci:
+    runs-on: ubuntu-latest
+    steps:
+      - name: Wait for CI
+        uses: lewagon/wait-on-check-action@v1.5.0
+        with:
+          ref: ${{ github.sha }}
+          check-name: 'Test (ubuntu-latest)'
+          repo-token: ${{ secrets.GITHUB_TOKEN }}
+          wait-interval: 10
+
+  notify-parent:
+    needs: wait-for-ci
+    runs-on: ubuntu-latest
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Determine source
+        id: source
+        run: |
+          if [ "${{ github.event_name }}" = "repository_dispatch" ]; then
+            echo "repo=${{ github.event.client_payload.repo }}" >> $GITHUB_OUTPUT
+            echo "repo_name=${{ github.event.client_payload.repo_name }}" >> $GITHUB_OUTPUT
+            echo "sha=${{ github.event.client_payload.sha }}" >> $GITHUB_OUTPUT
+            echo "short_sha=${{ github.event.client_payload.short_sha }}" >> $GITHUB_OUTPUT
+            echo "message=${{ github.event.client_payload.message }}" >> $GITHUB_OUTPUT
+            echo "type=${{ github.event.client_payload.type }}" >> $GITHUB_OUTPUT
+            echo "actor=${{ github.event.client_payload.actor }}" >> $GITHUB_OUTPUT
+          else
+            MSG=$(git log -1 --pretty=%s)
+            echo "message=$MSG" >> $GITHUB_OUTPUT
+            echo "repo=${{ github.repository }}" >> $GITHUB_OUTPUT
+            echo "repo_name=${{ github.event.repository.name }}" >> $GITHUB_OUTPUT
+            echo "actor=${{ github.actor }}" >> $GITHUB_OUTPUT
+            echo "sha=$(git rev-parse HEAD)" >> $GITHUB_OUTPUT
+            echo "short_sha=$(git rev-parse --short HEAD)" >> $GITHUB_OUTPUT
+            if [[ "$MSG" =~ ^feat[:(] ]]; then echo "type=feat" >> $GITHUB_OUTPUT
+            elif [[ "$MSG" =~ ^fix[:(] ]]; then echo "type=fix" >> $GITHUB_OUTPUT
+            elif [[ "$MSG" =~ ^chore[:(] ]]; then echo "type=chore" >> $GITHUB_OUTPUT
+            elif [[ "$MSG" =~ ^docs[:(] ]]; then echo "type=docs" >> $GITHUB_OUTPUT
+            elif [[ "$MSG" =~ ^test[:(] ]]; then echo "type=test" >> $GITHUB_OUTPUT
+            elif [[ "$MSG" =~ ^refactor[:(] ]]; then echo "type=refactor" >> $GITHUB_OUTPUT
+            else echo "type=other" >> $GITHUB_OUTPUT
+            fi
+          fi
+
+      - name: Notify parent repo
+        uses: peter-evans/repository-dispatch@v3
+        with:
+          token: ${{ secrets.PARENT_REPO_PAT }}
+          repository: harmony-labs/meta
+          event-type: child-repo-updated
+          client-payload: >-
+            {
+              "repo": ${{ toJSON(steps.source.outputs.repo) }},
+              "repo_name": ${{ toJSON(steps.source.outputs.repo_name) }},
+              "sha": ${{ toJSON(steps.source.outputs.sha) }},
+              "short_sha": ${{ toJSON(steps.source.outputs.short_sha) }},
+              "message": ${{ toJSON(steps.source.outputs.message) }},
+              "type": ${{ toJSON(steps.source.outputs.type) }},
+              "actor": ${{ toJSON(steps.source.outputs.actor) }}
+            }