This is a simple migrations tool for Sanity
You can run the following command to generate a new migration. (this should be run inside a Sanity studio project)
yarn sanity-migrations new my-migration
A new file will be created in the migrations directory in your studio. It will receive 2 arguments. The first one being a raw sanity client to use for your migration, the second one is an options object. At this time the only option is lastMigrationTs which contain a unix timestamp of the last run migration. (this is so you could query for documents after this time)
In your studio project you can run yarn sanity-migrations migrate to run the migrations.
The tool will respect your NODE_ENV and will use the appropriate dataset as defined in the env key of your sanity.json.
It will check the migration-log.json file to determine which migrations need to be executed. Before actually running the migrations you will be given an overview and asked whether to proceed or not.