add version

Makefile

@@ -2,17 +2,24 @@
 
 PROTOFILES=$(shell find . -name \*.proto)
 PBGOFILES=$(patsubst %.proto,%.pb.go,$(PROTOFILES))
-GOFILES=$(shell find . -name \*.go)
+GOFILES=$(shell find . \( -name \*.go ! -name version.go \) )
 
 # for protoc-gen-go
 export PATH := $(GOPATH)/bin:$(PATH)
 
 GOLDFLAGS=-ldflags '-r ${ORIGIN}:${ORIGIN}/../lib'
 
+
+BUILD_DATE=$(shell date +%Y%m%d)
+BUILD_REV=$(shell git rev-parse --short HEAD)
+BUILD_VERSION=dev-$(BUILD_DATE)-$(BUILD_REV)
+
 all: build test
 
 imposm3: $(GOFILES) $(PROTOFILES)
+	@sed -i '' 's/buildVersion = ".*"/buildVersion = "$(BUILD_VERSION)"/' version.go
 	go build $(GOLDFLAGS)
+	@sed -i '' 's/buildVersion = ".*"/buildVersion = ""/' version.go
 
 build: imposm3
 

imposm3.go

@@ -34,6 +34,7 @@ func printCmds() {
 	fmt.Println("\timport")
 	fmt.Println("\tdiff")
 	fmt.Println("\tquery-cache")
+	fmt.Println("\tversion")
 }
 
 func main() {
@@ -75,6 +76,9 @@ func main() {
 		}
 	case "query-cache":
 		query.Query(os.Args[2:])
+	case "version":
+		fmt.Println(imposmVersion)
+		os.Exit(0)
 	default:
 		printCmds()
 		log.Fatalf("invalid command: '%s'", os.Args[1])

version.go

@@ -0,0 +1,10 @@
+package main
+
+var imposmVersion string
+
+func init() {
+	// buidVersion gets replaced during build
+	var buildVersion = ""
+	imposmVersion = "0.1"
+	imposmVersion += buildVersion
+}