ci(calimero-js-sdk): build and release only if package doesn't exist in the registry

.github/workflows/calimero_sdk_publish.yml

@@ -1,4 +1,4 @@
-name: Publish Calimero SDK
+name: Publish Calimero JavaScript SDK
 
 on:
   push:
@@ -9,8 +9,38 @@ on:
   workflow_dispatch:
 
 jobs:
+  metadata:
+    name: Get package metadata
+    runs-on: ubuntu-latest
+    outputs:
+      package_exists: ${{ steps.check_release.outputs.exists }}
+    steps:
+      - uses: actions/checkout@v4
+      - name: Use Node.js
+        uses: actions/setup-node@v4
+        with:
+          node-version: "18.x"
+          registry-url: "https://registry.npmjs.org"
+          scope: "@calimero-is-near"
+
+      - name: Check if release exists
+        id: check_release
+        env:
+          GITHUB_TOKEN: ${{ secrets.GITHUB_TOKEN }}
+        run: |
+          PACKAGE_VERSION=$(node -p "require('./packages/calimero-sdk/package.json').version")
+          REGISTRY_VERSION=$(npm view @calimero-is-near/calimero-p2p-sdk@$VERSION version)
+          if [[ "$PACKAGE_VERSION" == "$REGISTRY_VERSION" ]]; then
+            echo "exists=true" >> $GITHUB_OUTPUT
+          else
+            echo "exists=false" >> $GITHUB_OUTPUT
+          fi
+
   publish:
+    name: Build and release
     runs-on: ubuntu-latest
+    needs: metadata
+    if: needs.metadata.outputs.package_exists == 'false'
     env:
       NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}
     steps: