Allow plugins to add multiple tabs

[GuessWhoSamFoo]

What this PR does / why we need it:
This is a non-breaking API change that allows plugin authors to add multiple tabs from a single plugin. Plugins will still be displayed in lexical order as they are sorted with tabs potentially from other plugins.

options := []service.PluginOption{
	service.WithTabPrinter(handleTab, handleTab2, handleTab3),
}

Which issue(s) this PR fixes

• Fixes Allow plugins to contribute multiple tab responses #1440

Signed-off-by: Sam Foo [email protected]

[xtreme-vikram-yadav]

So for now JS plugins can still generate a single tab? I'm guessing there will be updates here after corresponding changes are made pushed https://github.com/vmware-tanzu/plugin-library-for-octant?

[wwitzel3]

Good call out, we'll want to update https://github.com/vmware-tanzu/plugin-library-for-octant/blob/main/plugin/helpers.ts#L83 and https://github.com/vmware-tanzu/plugin-library-for-octant/blob/main/plugin/octant.d.ts#L62 after this lands.

[wwitzel3]

This looks good to me, please create an issue in the plugin library repo to ensure we update the libraries there for this new behavior as part of 0.18.

As mentioned in a comment, we'll want to update https://github.com/vmware-tanzu/plugin-library-for-octant/blob/main/plugin/helpers.ts#L83 and https://github.com/vmware-tanzu/plugin-library-for-octant/blob/main/plugin/octant.d.ts#L62 after this lands.

[GuessWhoSamFoo]

Merging so npm libraries can cut an update if desired.

[wwitzel3]

Bad review from me previously, I completely missed that the TabResponse object in the jsPlugin.PrintTabs method was hard coded to a single tab. So even with the typescript updates, the JS plugins won't be able to generate multiple tabs.

Sorry about that, I'll open for that and see about getting that implemented along side the TS libraries.

https://github.com/vmware-tanzu/octant/blob/master/pkg/plugin/javascript.go#L399