Add platform information to --version (#117)

* Add platform information to --version

Makefile

@@ -10,6 +10,7 @@ GIT_BRANCH := $(shell git rev-parse --abbrev-ref HEAD)
 GIT_HASH   := $(shell git rev-parse --verify HEAD)
 GIT_TAG    := $(shell git describe --tags --exact-match --abbrev=0 2>/dev/null || echo "")
 BUILD_TIME ?= $(shell date -u +"%Y-%m-%dT%H:%M:%SZ")
+PLATFORM   := $(OS)/$(ARCH)
 
 ifdef GIT_TAG
 	VERSION := $(GIT_TAG)/$(GIT_HASH)
@@ -19,7 +20,8 @@ endif
 
 LDFLAGS    := -X main.version=$(VERSION) \
     -X main.goVersion=$(shell go version | cut -d " " -f 3) \
-	-X main.buildTime=$(BUILD_TIME)
+	-X main.buildTime=$(BUILD_TIME) \
+	-X 'main.platform=$(PLATFORM)'
 
 all: $(TARGET)
 

version.go

@@ -6,23 +6,26 @@ type Version struct {
 	Version   string
 	GoVersion string
 	BuildTime string
+	Platform  string
 }
 
 var (
 	v         Version
 	version   string
 	goVersion string
 	buildTime string
+	platform  string
 )
 
 func init() {
 	v = Version{
 		Version:   version,
 		GoVersion: goVersion,
 		BuildTime: buildTime,
+		Platform:  platform,
 	}
 }
 
 func (ver Version) String() string {
-	return fmt.Sprintf("\ngit hash: %s\nGo version: %s\nBuild time: %s", v.Version, v.GoVersion, v.BuildTime)
+	return fmt.Sprintf("\ngit hash: %s\nGo version: %s\nBuild time: %s\nPlatform: %s", v.Version, v.GoVersion, v.BuildTime, v.Platform)
 }