Makefile: use macro to define the minimum required go version

Author: libotony

Makefile

@@ -7,7 +7,8 @@ THOR_VERSION = $(shell cat cmd/thor/VERSION)
 DISCO_VERSION = $(shell cat cmd/disco/VERSION)
 
 PACKAGES = `go list ./... | grep -v '/vendor/'`
-
+REQUIRED_GO_MAJOR = 1
+REQUIRED_GO_MINOR = 24
 MAJOR = $(shell go version | cut -d' ' -f3 | cut -b 3- | cut -d. -f1)
 MINOR = $(shell go version | cut -d' ' -f3 | cut -b 3- | cut -d. -f2)
 export GO111MODULE=on
@@ -32,12 +33,12 @@ dep:| go_version_check
 	@go mod download
 
 go_version_check:
-	@if test $(MAJOR) -lt 1; then \
-		echo "Go 1.24 or higher required"; \
+	@if test $(MAJOR) -lt $(REQUIRED_GO_MAJOR); then \
+		echo "Go $(REQUIRED_GO_MAJOR).$(REQUIRED_GO_MINOR) or higher required"; \
 		exit 1; \
 	else \
-		if test $(MAJOR) -eq 1 -a $(MINOR) -lt 22; then \
-			echo "Go 1.24 or higher required"; \
+		if test $(MAJOR) -eq $(REQUIRED_GO_MAJOR) -a $(MINOR) -lt $(REQUIRED_GO_MINOR); then \
+			echo "Go $(REQUIRED_GO_MAJOR).$(REQUIRED_GO_MINOR) or higher required"; \
 			exit 1; \
 		fi \
 	fi