Avoid creating json if upload fails

upload-media.sh

@@ -18,9 +18,11 @@ if test -f "$media_path"; then
     echo "Could not find $media_path.json, uploading media!"
     id=$(wp media import "$media_path" --porcelain $WP_FLAGS)
     url=$(wp rest attachment get "$id" --field=source_url $WP_FLAGS | sed 's/127.0.0.1/streetspeoplelove.org/')
+    if [ $? -eq 0 ]; then
       jq -n --arg id $id --arg url "$url" '{"id": $id, "url": $url}' > "$media_path.json"
       cat "$media_path.json"
     fi
+  fi
 else
   echo "Could not find $media_path"
 fi