Add version

Signed-off-by: Jianhui Zhao <jianhuizhao329@gmail.com>

main.go

@@ -31,6 +31,7 @@ import (
     "encoding/json"
      _ "github.com/zhaojh329/rttys/statik"
     "github.com/rakyll/statik/fs"
+    "github.com/zhaojh329/rttys/version"
 )
 
 type DeviceInfo struct {
@@ -55,6 +56,9 @@ func main() {
 
     rand.Seed(time.Now().Unix())
 
+    log.Println("BuildDate:", version.BuildDate)
+    log.Println("Gitref:", version.Gitref)
+
     br := newBridge()
     go br.run()
 

version/Makefile

@@ -0,0 +1,20 @@
+BUILDDATE=`date +%F`
+GITREF=`git describe --always --tags --long`
+
+# $(VERSION_GO) will be written to version.go
+VERSION_GO="/* DO NOT EDIT THIS FILE. IT IS GENERATED BY 'make'*/\n\
+package version\n\
+var Gitref, BuildDate string\n"
+
+# $(GIT_GO) will be written to gitref.go
+GITREF_GO="/* DO NOT EDIT THIS FILE. IT IS GENERATED BY make */ \n\n\
+package version\n\
+func init() { Gitref = \"$(GITREF)\"\nBuildDate= \"$(BUILDDATE)\"\n}  "
+
+#
+# setver updates version.go with VERSION
+#
+.PHONY:setver
+setver:
+	@printf $(VERSION_GO) | gofmt > version.go
+	@printf $(GITREF_GO) | gofmt > git.go

version/git.go

@@ -0,0 +1,8 @@
+/* DO NOT EDIT THIS FILE. IT IS GENERATED BY make */
+
+package version
+
+func init() {
+	Gitref = "0079594-dirty"
+	BuildDate = "2018-03-14"
+}

version/version.go

@@ -0,0 +1,4 @@
+/* DO NOT EDIT THIS FILE. IT IS GENERATED BY 'make'*/
+package version
+
+var Gitref, BuildDate string