Shipping "kubectl create something" plugin is impossible

[sttts]

Wile looking into shipping a kubectl create something plugin via krew I noticed that the - => _ rewriting in

krew/internal/installation/install.go

Line 242 in 48b3ea1

name = strings.ReplaceAll(name, "-", "_")

makes this impossible right now.

Background: kubectl allows these create plugins (and only those) since kubernetes/kubernetes#124123.

Basically we have this situation:

• $ kubectl create-something maps to the binary kubectl-create_something
• $ kubectl create something maps to the binary kubectl-create-something
• krew does the mentioned rewriting, turning the binary of the create-something plugin into the kubectl-create_something binary on disk (even though the binary in the plugin tar is properly named.

How could we allow to ship a kubectl-create-something binary?

xref https://kubernetes.slack.com/archives/CTJNMDM24/p1728488438493869

[ahmetb]

TIL kubectl create [...] now allows plugins as of v1.30. I think we should have a spec field in the Plugin manifest to facilitate this. Open questions:

1. Do we do this just for kubectl create? what if kubectl changes its mind to allow more builtin commands to support plugins, too?

2. Do we only skip the first dash, or do we preserve all dashes

   For example should a Plugin with name: create-x-y-z be linked as kubectl-create-x_y_z or kubectl-create-x-y-z? The latter technically allows invocations like:

   • kubectl create x-y-z
   • kubectl create x y z
   • kubectl create x-y z
   • ...

   (Krew intentionally only supports the first form, i.e. plugin is registered only with its metadata.name, as-is).

/kind feature
/priority important-soon