add version

Makefile

@@ -1,3 +1,7 @@
+REPO_PATH := gitlab.ricebook.net/platform/core
+REVISION := $(shell git rev-parse HEAD || unknown)
+GO_LDFLAGS ?= -s -X $(REPO_PATH)/version.REVISION=$(REVISION)
+
 golang:
 	cd ./rpc/gen/; protoc --go_out=plugins=grpc:. core.proto
 
@@ -18,3 +22,6 @@ deps:
 	go get gopkg.in/libgit2/git2go.v23
 	go get golang.org/x/net/context
 	go get google.golang.org/grpc
+
+build:
+	go build -ldflags "$(GO_LDFLAGS)" -a -tags netgo -installsuffix netgo -o eru-core

main.go

@@ -1,6 +1,7 @@
 package main
 
 import (
+	"fmt"
 	"io/ioutil"
 	"net"
 	"net/http"
@@ -15,6 +16,7 @@ import (
 	"gitlab.ricebook.net/platform/core/rpc"
 	"gitlab.ricebook.net/platform/core/rpc/gen"
 	"gitlab.ricebook.net/platform/core/types"
+	"gitlab.ricebook.net/platform/core/version"
 	"google.golang.org/grpc"
 	"gopkg.in/yaml.v2"
 )
@@ -98,10 +100,14 @@ func serve() {
 }
 
 func main() {
+	cli.VersionPrinter = func(c *cli.Context) {
+		fmt.Print(version.VersionString())
+	}
+
 	app := cli.NewApp()
-	app.Name = "Eru-Core"
+	app.Name = version.NAME
 	app.Usage = "Run eru core"
-	app.Version = "2.0.0"
+	app.Version = version.VERSION
 	app.Flags = []cli.Flag{
 		cli.StringFlag{
 			Name:        "config",

version/version.go

@@ -0,0 +1,24 @@
+package version
+
+import (
+	"fmt"
+	"runtime"
+	"time"
+)
+
+var (
+	NAME     = "Eru-Core"
+	VERSION  = "1.0.0"
+	REVISION = "HEAD"
+)
+
+func VersionString() string {
+	build := time.Now()
+	// 暂时隐藏吧, 也不知道按啥version发布的好
+	// version := fmt.Sprintf("Version:        %s\n", VERSION)
+	version := fmt.Sprintf("Git hash:       %s\n", REVISION)
+	version += fmt.Sprintf("Built:          %s\n", build.Format(time.RFC1123Z))
+	version += fmt.Sprintf("Golang version: %s\n", runtime.Version())
+	version += fmt.Sprintf("OS/Arch:        %s/%s\n", runtime.GOOS, runtime.GOARCH)
+	return version
+}