CCM-11026: publish on merge

Author: harrim91

.github/workflows/pr_closed.yaml

@@ -54,3 +54,60 @@ jobs:
       targetAccountGroup: "nhs-notify-template-management-dev"
       targetComponent: ${{ matrix.component }}
       terraformAction: "apply"
+
+  check-event-schemas-version-change:
+    name: Chaeck for event schemas package version change
+    needs: check-merge-or-workflow-dispatch
+    if: needs.check-merge-or-workflow-dispatch.outputs.deploy == 'true'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: read
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Use Node.js 20
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20.18.2'
+          registry-url: 'https://npm.pkg.github.com'
+
+      - name: check if local version differs from latest published version
+        run: |
+          published_version=$(npm view @nhsdigital/nhs-notify-templates-test-package --json  | jq -r '.["dist-tags"].latest')
+          local_version=$(cat packages/event-schemas/package.json | jq -r '.version')
+          if [[ $local_version = $published_version ]]; then
+            echo "Local version is the same as the latest published version - skipping publish"
+            echo "version_changed=false" >> $GITHUB_OUTPUT
+          else
+            echo "Local version is different to the latest published version - publishing new version"
+            echo "version_changed=true" >> $GITHUB_OUTPUT
+          fi
+
+  publish-event-schemas:
+    name: Publish event schemas package to GitHub package registry
+    needs: check-event-schemas-version-change
+    if: needs.check-event-schemas-version-change.outputs.version_changed == 'true'
+    runs-on: ubuntu-latest
+    permissions:
+      contents: read
+      packages: write
+
+    steps:
+      - name: Checkout code
+        uses: actions/checkout@v4
+
+      - name: Use Node.js 20
+        uses: actions/setup-node@v4
+        with:
+          node-version: '20.18.2'
+          registry-url: 'https://npm.pkg.github.com'
+
+      - name: Install dependencies
+        run: npm ci
+
+      - name: Publish to GitHub Packages
+        run: npm publish --workspace packages/event-schemas
+        env:
+          NODE_AUTH_TOKEN: ${{ secrets.GITHUB_TOKEN }}