Addlicense

[arkodg]

• Add tooling inside the Makefile to install tooling
  needed for various make targets
• Install & run addlicense which adds missing license header
  to files

Relates to #60

Signed-off-by: Arko Dasgupta arko@tetrate.io

[danehans]

@arkodg controller-gen can manage boilerplate code such as license headers. For example:

go run sigs.k8s.io/controller-tools/cmd/controller-gen object:headerFile="hack/boilerplate.go.txt" paths="./..."

Where hack/boilerplate.go.txt containers the license header:

# Copyright 2022 Envoyproxy Authors
...

This seems like a more streamlined approach for managing license headers.

[danehans]

See #84 (comment) for my review feedback.

[LukeShu]

@danehans:

controller-gen can manage boilerplate code such as license headers. For example: …

That'll control the license header that controller-gen includes in files that it generates; but controller-gen won't touch human-generated files that a human forgot to add a license header too, which is what the addlicense tool seems to do.

[arkodg]

closing based on comments from #92 mentioning that having a license in every file is not needed