fix post publish validation

.github/workflows/publish_npm.yml

@@ -72,9 +72,23 @@ jobs:
       - name: Pre upload validation
         id: pack
         run: | 
-          npm pack --dry-run >> output 2>&1
-          echo PRE_UPLOAD_HASH=$(cat output| grep shasum | cut -f4 -d" ") >> $GITHUB_OUTPUT
+          npm pack --dry-run > output 2>&1
+          PRE_UPLOAD_HASH=$(grep 'shasum' output | awk '{print $2}')
+          echo "PRE_UPLOAD_HASH=$PRE_UPLOAD_HASH" >> $GITHUB_OUTPUT
+          echo "PRE_UPLOAD_HASH: $PRE_UPLOAD_HASH"
         
+      - name: Check if version is already published
+        run: |
+          PACKAGE_NAME=$(cat package.json | jq -r .name)
+          PACKAGE_VERSION=$(cat package.json | jq -r .version)
+
+          if npm view $PACKAGE_NAME@$PACKAGE_VERSION > /dev/null 2>&1; then
+            echo "Version $PACKAGE_VERSION of $PACKAGE_NAME is already published."
+            exit 0
+          fi
+
+          echo "Version $PACKAGE_VERSION of $PACKAGE_NAME is not published. Proceeding with publishing..."
+
       - name: Upload package
         run: npm publish --access public
         env:
@@ -83,10 +97,24 @@ jobs:
       - name: Post upload validation
         id: unpack
         run: |
-          PACKAGE_NAME=$(cat package.json | jq .name | cut -f2 -d"\"")@$(cat package.json | jq .version | cut -f2 -d"\"")
-          echo POST_UPLOAD_HASH=$(npm view $PACKAGE_NAME) >> $GITHUB_OUTPUT
+          # Get the package name and version
+          PACKAGE_NAME=$(cat package.json | jq -r .name)
+          PACKAGE_VERSION=$(cat package.json | jq -r .version)
+          FULL_PACKAGE_NAME="${PACKAGE_NAME}@${PACKAGE_VERSION}"
+
+          # Fetch the shasum from npm
+          POST_UPLOAD_HASH=$(npm view $FULL_PACKAGE_NAME dist.shasum)
+          echo "POST_UPLOAD_HASH=$POST_UPLOAD_HASH" >> $GITHUB_OUTPUT
+          echo "POST_UPLOAD_HASH: $POST_UPLOAD_HASH"
 
       - name: Pre and Post Upload validation
-        if: steps.pack.outputs.PRE_UPLOAD_HASH != steps.unpack.outputs.POST_UPLOAD_HASH
-        # Fail if package hashes doesn't match
-        run: exit 1
+        run: |
+          echo "Comparing hashes..."
+          echo "PRE_UPLOAD_HASH: '${{ steps.pack.outputs.PRE_UPLOAD_HASH }}'"
+          echo "POST_UPLOAD_HASH: '${{ steps.unpack.outputs.POST_UPLOAD_HASH }}'"
+
+          if [ "${{ steps.pack.outputs.PRE_UPLOAD_HASH }}" != "${{ steps.unpack.outputs.POST_UPLOAD_HASH }}" ]; then
+            echo "Hash mismatch detected!"
+            exit 1
+          fi
+          echo "Hashes match successfully!"