gengo: Migrate to v2

[sayboras]

Description

This commit is to migrate gengo to v2, as v1 is no longer maintained¹.

Testing

Testing was done locally with make test, as well with cilium/cilium repo in this PR cilium/cilium#34988

$ make test
go fmt ./...
go vet ./...
PKGS=$(go list ./output_tests/...  | paste -sd' ' -); \
/tmp/deepequal-gen --logtostderr --v=0 -O zz_generated.go -h hack/boilerplate.txt --output-base /tmp/tmp.IOS7XpKTWS $PKGS
cp -r "/tmp/tmp.IOS7XpKTWS/github.com/cilium/deepequal-gen/." ./
rm -rf "/tmp/tmp.IOS7XpKTWS"
SUCCESS: no differences in generated output

Testing with cilium/cilium

# Remove all deepequal generated files
$ find . -name zz_generated.deepequal.go | grep -v vendor | xargs rm -f 

# Run make generate-k8s-api-local to re-generate deepequal files
% make generate-k8s-api-local
grep: warning: stray \ before +
go install k8s.io/code-generator/cmd/go-to-protobuf/protoc-gen-gogo && go install golang.org/x/tools/cmd/goimports && go run k8s.io/code-generator/cmd/go-to-protobuf --apimachinery-packages='-k8s.io/apimachinery/pkg/util/intstr,-k8s.io/apimachinery/pkg/api/resource,-k8s.io/apimachinery/pkg/runtime/schema,-k8s.io/apimachinery/pkg/runtime,-k8s.io/apimachinery/pkg/apis/meta/v1,-k8s.io/apimachinery/pkg/apis/meta/v1beta1' --drop-embedded-fields="github.com/cilium/cilium/pkg/k8s/slim/k8s/apis/meta/v1.TypeMeta" --proto-import="$PWD" --proto-import="$PWD/vendor" --proto-import="$PWD/tools/protobuf" --packages=github.com/cilium/cilium/pkg/k8s/slim/k8s/api/core/v1,github.com/cilium/cilium/pkg/k8s/slim/k8s/api/discovery/v1,github.com/cilium/cilium/pkg/k8s/slim/k8s/api/discovery/v1beta1,github.com/cilium/cilium/pkg/k8s/slim/k8s/api/networking/v1,github.com/cilium/cilium/pkg/k8s/slim/k8s/apis/apiextensions/v1,github.com/cilium/cilium/pkg/k8s/slim/k8s/apis/meta/v1,github.com/cilium/cilium/pkg/k8s/slim/k8s/apis/meta/v1beta1,github.com/cilium/cilium/pkg/k8s/slim/k8s/apis/util/intstr --go-header-file "$PWD/hack/custom-boilerplate.go.txt" --output-dir=$GOPATH/src
go run github.com/cilium/deepequal-gen --go-header-file "$PWD/hack/custom-boilerplate.go.txt" --output-file zz_generated.deepequal.go --output-base "/tmp/cilium.tmpW79RrS0J" github.com/cilium/cilium/api/v1/models github.com/cilium/cilium/api/v1/server github.com/cilium/cilium/pkg/alibabacloud/eni/types github.com/cilium/cilium/pkg/aws/eni/types github.com/cilium/cilium/pkg/azure/types github.com/cilium/cilium/pkg/bgpv1/manager/reconcilerv2 github.com/cilium/cilium/pkg/bgpv1/types github.com/cilium/cilium/pkg/datapath/tables github.com/cilium/cilium/pkg/datapath/types github.com/cilium/cilium/pkg/ipam/types github.com/cilium/cilium/pkg/k8s github.com/cilium/cilium/pkg/k8s/apis/cilium.io/v2 github.com/cilium/cilium/pkg/k8s/apis/cilium.io/v2alpha1 github.com/cilium/cilium/pkg/k8s/slim/k8s/api/core/v1 github.com/cilium/cilium/pkg/k8s/slim/k8s/api/discovery/v1 github.com/cilium/cilium/pkg/k8s/slim/k8s/api/discovery/v1beta1 github.com/cilium/cilium/pkg/k8s/slim/k8s/api/networking/v1 github.com/cilium/cilium/pkg/k8s/slim/k8s/apis/labels github.com/cilium/cilium/pkg/k8s/slim/k8s/apis/meta/v1 github.com/cilium/cilium/pkg/k8s/slim/k8s/apis/util/intstr github.com/cilium/cilium/pkg/k8s/types github.com/cilium/cilium/pkg/labels github.com/cilium/cilium/pkg/labelsfilter github.com/cilium/cilium/pkg/loadbalancer github.com/cilium/cilium/pkg/node github.com/cilium/cilium/pkg/node/types github.com/cilium/cilium/pkg/policy/api github.com/cilium/cilium/pkg/service/store
contrib/scripts/k8s-code-gen.sh "/tmp/cilium.tmpW79RrS0J"
SCRIPT_ROOT=/home/tammach/go/src/github.com/cilium/cilium/contrib/scripts/../..
Generating client code for 4 targets
grep: /tmp/cilium.tmpW79RrS0J/github.com/cilium/cilium/pkg/k8s/slim/k8s/client/clientset: No such file or directory
Generating lister code for 4 targets
grep: /tmp/cilium.tmpW79RrS0J/github.com/cilium/cilium/pkg/k8s/slim/k8s/client/listers: No such file or directory
Generating informer code for 4 targets
grep: /tmp/cilium.tmpW79RrS0J/github.com/cilium/cilium/pkg/k8s/slim/k8s/client/informers: No such file or directory
Generating client code for 1 targets
grep: /tmp/cilium.tmpW79RrS0J/github.com/cilium/cilium/pkg/k8s/slim/k8s/apiextensions-client/clientset: No such file or directory
Generating lister code for 1 targets
grep: /tmp/cilium.tmpW79RrS0J/github.com/cilium/cilium/pkg/k8s/slim/k8s/apiextensions-client/listers: No such file or directory
Generating informer code for 1 targets
grep: /tmp/cilium.tmpW79RrS0J/github.com/cilium/cilium/pkg/k8s/slim/k8s/apiextensions-client/informers: No such file or directory
Generating client code for 2 targets
grep: /tmp/cilium.tmpW79RrS0J/github.com/cilium/cilium/pkg/k8s/client/clientset: No such file or directory
Generating lister code for 2 targets
grep: /tmp/cilium.tmpW79RrS0J/github.com/cilium/cilium/pkg/k8s/client/listers: No such file or directory
Generating informer code for 2 targets
grep: /tmp/cilium.tmpW79RrS0J/github.com/cilium/cilium/pkg/k8s/client/informers: No such file or directory
Generating deepcopy code for 3 targets
Generating deepcopy code for 25 targets
Generating defaulter code for 3 targets
Generating conversion code for 3 targets
rm -rf "/tmp/cilium.tmpW79RrS0J"

# Check current git status
$ gst
On branch pr/tammach/enable-type-alias
Your branch is up to date with 'origin/pr/tammach/enable-type-alias'.

nothing to commit, working tree clean

Footnotes

1. https://github.com/kubernetes/gengo/pull/281#issuecomment-2374353462 ↩

[sayboras]

Ah thinking about this again, probably just need to wait for new controller-tools versions, so that we can upgrade in deps in cilium/cilium at once.

Marking this as draft again.