For people upgrading from earlier versions of rules_oci, it works out better to use +tarball than tarball. With the docs as currently written, without the plus sign, it will break for anyone using an earlier version of rules_oci. Adding the plus makes it work with either older or newer versions of rules_oci, which is convenient for people who are upgrading incrementally.
It's probably a good habit, anyway, to use the plus. When you want an extra output group to a build, you usually don't want to cancel all the output groups you don't know about. You just want to add the one new one that you do care about.
For people upgrading from earlier versions of rules_oci, it works out better to use
+tarballthantarball. With the docs as currently written, without the plus sign, it will break for anyone using an earlier version of rules_oci. Adding the plus makes it work with either older or newer versions of rules_oci, which is convenient for people who are upgrading incrementally.It's probably a good habit, anyway, to use the plus. When you want an extra output group to a build, you usually don't want to cancel all the output groups you don't know about. You just want to add the one new one that you do care about.