Mongodb extract index creation script

extract-index.js

db.getCollectionInfos({ type: "collection" }).forEach(function(coll) {
      db[coll.name].getIndexes().forEach(function(index) {
        if ("_id_" !== index.name) {
          print("db." + coll.name + ".createIndex(" + tojson(index.key) + ", "+tojson({name:index.name})+");");
        }
      });
});