Version add a proper way to bake in version into the bin

Signed-off-by: Carlos Eduardo Arango Gutierrez <carangog@redhat.com>

Makefile

@@ -84,6 +84,7 @@ GOOS=linux
 PACKAGE=sigs.k8s.io/node-feature-discovery-operator
 MAIN_PACKAGE=main.go
 BIN=node-feature-discovery-operator
+LDFLAGS = -ldflags "-s -w -X sigs.k8s.io/node-feature-discovery-operator/pkg/version.version=$(VERSION)"
 
 PROJECT_DIR := $(shell dirname $(abspath $(lastword $(MAKEFILE_LIST))))
 
@@ -100,7 +101,7 @@ go_mod:
 
 # Build binary
 build: go_mod
-	@GOOS=$(GOOS) GO111MODULE=on CGO_ENABLED=0 $(GO_CMD) build -o $(BIN) $(MAIN_PACKAGE)
+	@GOOS=$(GOOS) GO111MODULE=on CGO_ENABLED=0 $(GO_CMD) build -o $(BIN) $(LDFLAGS) $(MAIN_PACKAGE)
 
 # Run against the configured Kubernetes cluster in ~/.kube/config
 run: generate fmt vet manifests

main.go

@@ -22,7 +22,6 @@ import (
 	"os"
 
 	_ "k8s.io/client-go/plugin/pkg/client/auth"
-	"k8s.io/component-base/version"
 	"k8s.io/klog/v2"
 
 	"k8s.io/apimachinery/pkg/runtime"
@@ -34,6 +33,7 @@ import (
 	nfdkubernetesiov1 "sigs.k8s.io/node-feature-discovery-operator/api/v1"
 	"sigs.k8s.io/node-feature-discovery-operator/controllers"
 	"sigs.k8s.io/node-feature-discovery-operator/pkg/utils"
+	"sigs.k8s.io/node-feature-discovery-operator/pkg/version"
 	// +kubebuilder:scaffold:imports
 )
 

pkg/version/version.go

@@ -0,0 +1,32 @@
+/*
+Copyright 2022 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 version
+
+const undefinedVersion string = "undefined"
+
+// Must not be const, supposed to be set using ldflags at build time
+var version = undefinedVersion
+
+// Get returns the version as a string
+func Get() string {
+	return version
+}
+
+// Undefined returns if version is at it's default value
+func Undefined() bool {
+	return version == undefinedVersion
+}