A linter to enforce importing certain packages consistently.
What is this for?
Ideally, go imports should avoid aliasing. Sometimes though, especially with Kubernetes API code, it becomes unavoidable, because many packages are imported as e.g. "[package]/v1alpha1" and you end up with lots of collisions if you use "v1alpha1".
This linter lets you enforce that whenever (for example) "pkg/apis/serving/v1alpha1" is aliased, it is aliased as "servingv1alpha1".
Usage
importas \
-alias knative.dev/serving/pkg/apis/autoscaling/v1alpha1:autoscalingv1alpha1 \
-alias knative.dev/serving/pkg/apis/serving/v1:servingv1 \
./...
Use regular expression
You can specify the package path by regular expression, and alias by regular expression replacement syntax like following snippet.
importas -alias 'knative.dev/serving/pkg/apis/(\w+)/(v[\w\d]):$1$2'
$1 represents the text of the first submatch. See detail.
So it will enforce that
"knative.dev/serving/pkg/apis/autoscaling/v1alpha1" is aliased by "autoscalingv1alpha1", and "knative.dev/serving/pkg/apis/serving/v1" is aliased by "servingv1"