Use vendored code generators

BUILD.bazel

@@ -1,6 +1,7 @@
 # gazelle:prefix k8s.io/test-infra
 # gazelle:proto disable_global
 # gazelle:exclude vendor/k8s.io/code-generator/_examples/
+# gazelle:exclude hack
 
 load("@io_kubernetes_build//defs:run_in_workspace.bzl", "workspace_binary")
 load("@build_bazel_rules_nodejs//:defs.bzl", "nodejs_binary")

hack/tools.go

@@ -0,0 +1,27 @@
+/*
+Copyright 2019 The Kubernetes Authors.
+
+Licensed under the Apache License, Version 2.0 (the "License");
+you may not use this file except in compliance with the License.
+You may obtain a copy of the License at
+
+    http://www.apache.org/licenses/LICENSE-2.0
+
+Unless required by applicable law or agreed to in writing, software
+distributed under the License is distributed on an "AS IS" BASIS,
+WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+See the License for the specific language governing permissions and
+limitations under the License.
+*/
+
+package hack
+
+// +build tools
+
+// Add tools that hack scripts depend on here, to ensure they are vendored.
+import (
+	_ "k8s.io/code-generator/cmd/client-gen"
+	_ "k8s.io/code-generator/cmd/deepcopy-gen"
+	_ "k8s.io/code-generator/cmd/informer-gen"
+	_ "k8s.io/code-generator/cmd/lister-gen"
+)

hack/update-codegen.sh

@@ -21,7 +21,6 @@ cd "$(git rev-parse --show-toplevel)"
 
 export GOPATH="${GOPATH:-$HOME/go}"
 export PATH="${GOPATH}/bin:${PATH}"
-export GO111MODULE=on
 
 ensure-in-gopath() {
   if [[ "${PWD}" != "${GOPATH}/src/k8s.io/test-infra" ]]; then
@@ -32,12 +31,7 @@ ensure-in-gopath() {
 
 codegen-init() {
   echo "Ensuring generators exist..." >&2
-  local ver=b1289fc74931d4b6b04bd1a259acfc88a2cb0a66
-  which deepcopy-gen &>/dev/null || go get k8s.io/code-generator/cmd/deepcopy-gen@${ver}
-  which client-gen &>/dev/null || go get k8s.io/code-generator/cmd/client-gen@${ver}
-  which lister-gen &>/dev/null || go get k8s.io/code-generator/cmd/lister-gen@${ver}
-  which informer-gen &>/dev/null || go get k8s.io/code-generator/cmd/informer-gen@${ver}
-  bazel run //:go -- mod tidy
+  go install ./vendor/k8s.io/code-generator/cmd/{deepcopy,client,lister,informer}-gen
 }
 
 gen-deepcopy() {