fix: match the golang version in go.mod

Makefile

@@ -12,7 +12,7 @@
 #   See the License for the specific language governing permissions and
 #   limitations under the License.
 
-GO_VERSION  ?= 1.15
+GO_VERSION  ?= $(shell go run ./scripts/detectgoversion/detect.go 2>/dev/null || printf '1.16')
 BINNAME     ?= move2kube
 PLUGIN_BINNAME ?= kubectl-translate
 BINDIR      := $(CURDIR)/bin
@@ -73,7 +73,7 @@ build: get $(BINDIR)/$(BINNAME) ## Build go code
 	@printf "\033[32m-------------------------------------\n BUILD SUCCESS\n-------------------------------------\033[0m\n"
 
 $(BINDIR)/$(BINNAME): $(SRC)
-	go build -tags excludecodegen,excludedist -ldflags '$(LDFLAGS)' -o $(BINDIR)/$(BINNAME) ./cmd/${BINNAME}
+	go build -ldflags '$(LDFLAGS)' -o $(BINDIR)/$(BINNAME) ./cmd/${BINNAME}
 ifeq ($(HAS_UPX),true)
 	@echo 'upx detected. compressing binary...'
 	upx $(BINDIR)/$(BINNAME)
@@ -89,7 +89,7 @@ endif
 build-kubectl-translate: get $(BINDIR)/$(PLUGIN_BINNAME) ## Build translate plugin for kubectl https://github.com/kubernetes-sigs/krew
 
 $(BINDIR)/$(PLUGIN_BINNAME): $(SRC)
-	go build -tags excludecodegen,excludedist -ldflags '$(LDFLAGS)' -o $(BINDIR)/$(PLUGIN_BINNAME) ./cmd/kubectltranslate
+	go build -ldflags '$(LDFLAGS)' -o $(BINDIR)/$(PLUGIN_BINNAME) ./cmd/kubectltranslate
 
 .PHONY: get
 get: go.mod

internal/common/generator/generator.go

@@ -1,4 +1,4 @@
-// +build !excludecodegen
+// +build ignore
 
 /*
 Copyright IBM Corporation 2020

internal/common/generator/generator_test.go

@@ -1,4 +1,4 @@
-// +build !excludecodegen
+// +build ignore
 
 /*
 Copyright IBM Corporation 2020

scripts/builddist.go

@@ -1,4 +1,4 @@
-// +build !excludedist
+// +build ignore
 
 /*
 Copyright IBM Corporation 2020

scripts/detectgoversion/detect.go

@@ -0,0 +1,46 @@
+// +build ignore
+
+/*
+Copyright IBM Corporation 2020
+
+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 main
+
+import (
+	"fmt"
+	"io/ioutil"
+	"os"
+
+	"golang.org/x/mod/modfile"
+)
+
+func main() {
+	modFilePath := "go.mod"
+	if len(os.Args) == 2 && os.Args[1] != "" {
+		modFilePath = os.Args[1]
+	}
+	data, err := ioutil.ReadFile(modFilePath)
+	if err != nil {
+		panic(err)
+	}
+	modFile, err := modfile.Parse(modFilePath, data, nil)
+	if err != nil {
+		panic(err)
+	}
+	if modFile.Go == nil {
+		panic(fmt.Sprintf("didn't find the go version in the go.mod file at path %s", modFilePath))
+	}
+	fmt.Print(modFile.Go.Version)
+}