Add graftcp-local version info

Makefile

@@ -53,7 +53,7 @@ graftcp: main.o util.o string-set.o
 	$(CC) $(CFLAGS) -c -o $@ $<
 
 $(GRAFTCP_LOCAL_BIN)::
-	$(MAKE) -C graftcp-local
+	$(MAKE) -C graftcp-local VERSION=$(VERSION)
 
 install:: graftcp $(GRAFTCP_LOCAL_BIN)
 	$(INSTALL) $< $(DESTDIR)$(BINDIR)/$<

graftcp-local/Makefile

@@ -1,6 +1,10 @@
 export GOPATH := $(CURDIR)/.gopath
 export PATH := $(PATH):$(CURDIR)/.gopath/bin
 
+ifneq ($(shell echo $(VERSION) | head -c 1), v)
+	VERSION=v0.3
+endif
+
 PREFIX = /usr/local
 BINDIR = $(PREFIX)/bin
 
@@ -11,7 +15,7 @@ GO_IMPORT_PATH := github.com/hmgle/graftcp/graftcp-local
 all:: graftcp-local
 
 graftcp-local: .gopath/.created $(wildcard *.go)
-	go build -ldflags "-s -w" $(GO_IMPORT_PATH)
+	go build -ldflags "-s -w -X main.version=${VERSION}" $(GO_IMPORT_PATH)
 
 .gopath/.created:
 	rm -rf .gopath

graftcp-local/main.go

@@ -10,7 +10,10 @@ import (
 	"github.com/kardianos/service"
 )
 
-var selectProxyMode string
+var (
+	selectProxyMode string
+	version         = "v0.3"
+)
 
 type App struct {
 	ListenAddr     string
@@ -86,7 +89,12 @@ func main() {
 		"Set the mode for select a proxy [auto | random | only_http_proxy | only_socks5]")
 	flag.StringVar(&configFile, "config", "", "Path to the configuration file")
 	flag.StringVar(&app.PipePath, "pipepath", "/tmp/graftcplocal.fifo", "Pipe path for graftcp to send address info")
+	v := flag.Bool("version", false, "Print the graftcp-local version information")
 	flag.Parse()
+	if *v {
+		fmt.Printf("graftcp-local version %s\n", version)
+		os.Exit(0)
+	}
 	ParseConfigFile(configFile, app)
 	dlog.Noticef("graftcp-local start")