publishi package only if version updated

Author: alex-titarenko

.github/workflows/release.yml

@@ -49,7 +49,21 @@ jobs:
         with:
           path: docs/
 
+      - name: Set env IS_NEW_VERSION
+        run: |
+          PACKAGE_VERSION="$(node -p -e "require('./package.json').version")"
+          PACKAGE_NAME="$(node -p -e "require('./package.json').name")"
+          FOUND_VERSION=$(npm view $PACKAGE_NAME versions | grep \'$VERSION\')
+
+          if $FOUND_VERSION
+          then
+            IS_NEW_VERSION=true
+          fi
+
+          echo "IS_NEW_VERSION=$IS_NEW_VERSION" >> $GITHUB_ENV
+
       - name: Publish package
+        if: env.IS_NEW_VERSION == 'true'
         run: npm publish
         env:
           NODE_AUTH_TOKEN: ${{ secrets.NPM_TOKEN }}