[mdatagen] missing imports after running `make generate`

[kaiyan-sheng]

Component(s)

cmd/mdatagen

What happened?

Describe the bug
When a new metric is added into metadata.yaml file and make generate is ran, I can see multiple files generated by mdatagen. But one of the files internal/metadataset/generated_telemetrytest_test.go is missing an import:

Steps to reproduce

1. add a metric in metadata.yaml
2. run make generate
3. you can check Use mdatagen to add a telemetry metric kaiyan-sheng/opentelemetry-collector-components#1 as an example for the missing import

The workaround is to run goimports after the make generate command. But it would be nice to have mdatagen to take care of the imports directly.

What did you expect to see?
I expect to see "github.com/elastic/opentelemetry-collector-components/processor/ratelimitprocessor/internal/metadata" in the import list.

What did you see instead?
Missing import instead.

Collector version

v0.125.0

Environment information

Environment

OS: macOS 15.4.1
Compiler(if manually compiled): go 1.23.8

[sincejune]

@kaiyan-sheng To resolve this issue quickly, you can run make gogenerate, which will correctly add the missing imports.

Since this is a Go template-based module, it's quite challenging to conditionally track all the imports. We've encountered similar issues frequently. However, feel free to open a PR to address this problem!

[kingbj940429]

Can I work this? :)

[andborja]

PR to fix this:
#13469