Feature: add version command (#148)

Makefile

@@ -1,6 +1,10 @@
 NAME=clash
 BINDIR=bin
-GOBUILD=CGO_ENABLED=0 go build -ldflags '-w -s'
+VERSION=$(shell git describe --tags --long --dirty || echo "unkown version")
+BUILDTIME=$(shell date -u)
+GOBUILD=CGO_ENABLED=0 go build -ldflags '-X "github.com/Dreamacro/clash/constant.Version=$(VERSION)" \
+		-X "github.com/Dreamacro/clash/constant.BuildTime=$(BUILDTIME)" \
+		-w -s'
 
 PLATFORM_LIST = \
 	darwin-amd64 \
@@ -77,10 +81,10 @@ zip_releases=$(addsuffix .zip, $(WINDOWS_ARCH_LIST))
 
 $(gz_releases): %.gz : %
 	chmod +x $(BINDIR)/$(NAME)-$(basename $@)
-	gzip -f $(BINDIR)/$(NAME)-$(basename $@)
+	tar -czf $(BINDIR)/$(NAME)-$(basename $@)-$(VERSION).tar.gz -C $(BINDIR) $(NAME)-$(basename $@)
 
 $(zip_releases): %.zip : %
-	zip -m -j $(BINDIR)/$(NAME)-$(basename $@).zip $(BINDIR)/$(NAME)-$(basename $@).exe
+	zip -m -j $(BINDIR)/$(NAME)-$(basename $@)-$(VERSION).zip $(BINDIR)/$(NAME)-$(basename $@).exe
 
 all-arch: $(PLATFORM_LIST) $(WINDOWS_ARCH_LIST)
 

constant/version.go

@@ -0,0 +1,6 @@
+package constant
+
+var (
+	Version   = "unknown version"
+	BuildTime = "unknown time"
+)

main.go

@@ -2,9 +2,11 @@ package main
 
 import (
 	"flag"
+	"fmt"
 	"os"
 	"os/signal"
 	"path/filepath"
+	"runtime"
 	"syscall"
 
 	"github.com/Dreamacro/clash/config"
@@ -15,15 +17,22 @@ import (
 )
 
 var (
+	version bool
 	homedir string
 )
 
 func init() {
 	flag.StringVar(&homedir, "d", "", "set configuration directory")
+	flag.BoolVar(&version, "v", false, "show current version of clash")
 	flag.Parse()
 }
 
 func main() {
+	if version {
+		fmt.Printf("Clash %s %s %s %s\n", C.Version, runtime.GOOS, runtime.GOARCH, C.BuildTime)
+		return
+	}
+
 	// enable tls 1.3 and remove when go 1.13
 	os.Setenv("GODEBUG", os.Getenv("GODEBUG")+",tls13=1")