[pkg/ottl] Add `IsList` Converter

[TylerHelmuth]

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Component(s)

pkg/ottl

Is your feature request related to a problem? Please describe.

OTTL has no way to check if a value is a pcommon.Slice type.

Describe the solution you'd like

Add a new Converter, IsList that returns true if the given type is a pcommon.Slice (or equivalent type). It will work similarly to the IsMap function.

The implementing PR should

• [ ] Implement the function
• [ ] Add new unit tests for the function
• [ ] Add the function to pkg/ottl/ottlfuncs/functions.go
• [ ] Update the README at pkg/ottl/ottlfuncs/README.md

Implementing this function will mean introducing a new PSliceGetter interface, similar to the PMapGetter interface. If the type is a slice but cannot be converted to a pcommon.Slice, then an error should be returned.

[strawgate]

I'd like to do this one at contribfest!

[codeboten]

Thanks @strawgate!

[github-actions[bot]]

This issue has been inactive for 60 days. It will be closed in 60 days if there is no activity. To ping code owners by adding a component label, see Adding Labels via Comments, or if you are unsure of which component this issue relates to, please ping @open-telemetry/collector-contrib-triagers. If this issue is still relevant, please ping the code owners or leave a comment explaining why it is still relevant. Otherwise, please close it.

Pinging code owners:

• pkg/ottl: @TylerHelmuth @kentquirk @bogdandrutu @evan-bradley

See Adding Labels via Comments if you do not have permissions to add labels yourself.

[github-actions[bot]]

This issue has been inactive for 60 days. It will be closed in 60 days if there is no activity. To ping code owners by adding a component label, see Adding Labels via Comments, or if you are unsure of which component this issue relates to, please ping @open-telemetry/collector-contrib-triagers. If this issue is still relevant, please ping the code owners or leave a comment explaining why it is still relevant. Otherwise, please close it.

Pinging code owners:

• pkg/ottl: @TylerHelmuth @kentquirk @bogdandrutu @evan-bradley

See Adding Labels via Comments if you do not have permissions to add labels yourself.

[evan-bradley]

@strawgate Just checking in, are you still able to work on this?

[strawgate]

@evan-bradley sorry, was on partial leave for a little bit. I'll pick this up this week!

[strawgate]

Re-opened PR at https://github.com/open-telemetry/opentelemetry-collector-contrib/pull/32392

[strawgate]

The pr has been merged so I think this can be closed!