Remove hack/tools go module

The hack/tools go module seems to exist just so we could install
kustomize and controller-gen. These can be installed now with `go
install`, and we have already installed `golangci_lint` that way.

Signed-off-by: Huy Mai <[email protected]>

Dockerfile

@@ -13,8 +13,6 @@ COPY go.mod go.mod
 COPY go.sum go.sum
 COPY apis/go.mod apis/go.mod
 COPY apis/go.sum apis/go.sum
-COPY hack/tools/go.mod hack/tools/go.mod
-COPY hack/tools/go.sum hack/tools/go.sum
 COPY pkg/hardwareutils/go.mod pkg/hardwareutils/go.mod
 COPY pkg/hardwareutils/go.sum pkg/hardwareutils/go.sum
 RUN go mod download

Makefile

@@ -16,13 +16,16 @@ ROOT_DIR := $(shell dirname $(realpath $(firstword $(MAKEFILE_LIST))))
 #       instead of storing it
 #
 #
-BIN_DIR := bin
-TOOLS_DIR := hack/tools
-TOOLS_BIN_DIR := $(abspath $(TOOLS_DIR)/$(BIN_DIR))
+TOOLS_BIN_DIR := $(abspath $(hack/tools/bin))
 
 CRD_OPTIONS ?= "crd:allowDangerousTypes=true,crdVersions=v1"
-KUSTOMIZE = tools/bin/kustomize
-CONTROLLER_GEN = tools/bin/controller-gen
+KUSTOMIZE = $(TOOLS_BIN_DIR)/kustomize
+KUSTOMIZE_PKG = sigs.k8s.io/kustomize/kustomize/v4
+KUSTOMIZE_VER = v4.5.7
+
+CONTROLLER_GEN = $(TOOLS_BIN_DIR)/controller-gen
+CONTROLLER_GEN_PKG = sigs.k8s.io/controller-tools/cmd/controller-gen
+CONTROLLER_GEN_VER = v0.12.1
 GINKGO = tools/bin/ginkgo
 GINKGO_VER = v2.17.1
 
@@ -187,11 +190,11 @@ deploy: $(KUSTOMIZE) manifests  ## Deploy controller in the configured Kubernete
 	make set-manifest-image-bmo MANIFEST_IMG=$(IMG_NAME) MANIFEST_TAG=$(IMG_TAG)
 	$< build config/default | kubectl apply -f -
 
-$(CONTROLLER_GEN): hack/tools/go.mod
-	cd hack/tools; go build -o $(abspath $@) sigs.k8s.io/controller-tools/cmd/controller-gen
+$(CONTROLLER_GEN):
+	GOBIN=$(TOOLS_BIN_DIR) go install $(CONTROLLER_GEN_PKG)@$(CONTROLLER_GEN_VER)
 
-$(KUSTOMIZE): hack/tools/go.mod
-	cd hack/tools; go build -o $(abspath $@) sigs.k8s.io/kustomize/kustomize/v4
+$(KUSTOMIZE):
+	GOBIN=$(TOOLS_BIN_DIR) go install $(KUSTOMIZE_PKG)@$(KUSTOMIZE_VER)
 
 .PHONY: build-e2e
 build-e2e:
@@ -315,8 +318,6 @@ mod: ## Clean up go module settings
 	cd apis; go mod verify
 	cd pkg/hardwareutils; go mod tidy
 	cd pkg/hardwareutils; go mod verify
-	cd hack/tools; go mod tidy
-	cd hack/tools; go mod verify
 	cd test; go mod tidy
 	cd test; go mod verify
 

docs/releasing.md

@@ -86,7 +86,7 @@ This triggers two things:
 
 We also need to create one or more tags for the Go modules ecosystem:
 
-- For any subdirectory with `go.mod` in it (excluding `hack/tools`), create
+- For any subdirectory with `go.mod` in it, create
   another Git tag with directory prefix, ie. `git tag apis/v0.x.y`,
   `git tag test/v0.x.y` and `git tag pkg/hardwareutils/v0.x.y`. This enables the
   tags to be used as a Gomodule version for any downstream users. **NOTE**: Do