Unified handling of printing versions of programs (--version). Setting version to 0.5

cmd/mtdbconverter/main.go

@@ -98,6 +98,7 @@ func main() {
 		dstBackend     string
 		srcInterleaved bool
 		dstInterleaved bool
+		version        bool
 	)
 
 	flag.Usage = usage
@@ -118,9 +119,14 @@ func main() {
 		"Should dest database be interleaved?")
 	flag.BoolVar(&dstInterleaved, "di", true,
 		"Should source database be interleaved? Shorthand")
+	flag.BoolVar(&version, "version", false, "Print version and exit.")
 
 	flag.Parse()
 
+	if version {
+		common.PrintVersionAndExit()
+	}
+
 	if flag.NArg() < 2 {
 		log.Fatal("Missing source and/or destination database.")
 	}

cmd/mtredisalize/main.go

@@ -13,11 +13,12 @@ import (
 	"os/signal"
 	"runtime"
 	"time"
+
+	"bitbucket.org/s_l_teichmann/mtsatellite/common"
 )
 
 const (
 	defaultMaxBulkStringSize = 32 * 1024 * 1024
-	Version                  = "0.3"
 	GCDuration               = "24h"
 	ChangeDuration           = "30s"
 )
@@ -63,8 +64,7 @@ func main() {
 	flag.Parse()
 
 	if version {
-		fmt.Printf("Version: %s\n", Version)
+		common.PrintVersionAndExit()
-		os.Exit(0)
 	}
 
 	if flag.NArg() < 1 {

cmd/mtseeder/main.go

@@ -25,6 +25,7 @@ func main() {
 		skipPyramid    bool
 		transparent    bool
 		transparentDim float64
+		version        bool
 	)
 
 	flag.IntVar(&port, "port", 6379, "port to of mtredisalize server")
@@ -51,9 +52,14 @@ func main() {
 	flag.Float64Var(&transparentDim,
 		"td", common.DefaultTransparentDim*100.0,
 		"Extra fimming of transparent nodes each depth meter in percent. (shorthand)")
+	flag.BoolVar(&version, "version", false, "Print version and exit.")
 
 	flag.Parse()
 
+	if version {
+		common.PrintVersionAndExit()
+	}
+
 	if !skipBaseLevel {
 		td := common.Clamp32f(float32(transparentDim/100.0), 0.0, 1.0)
 		address := fmt.Sprintf("%s:%d", host, port)

cmd/mttilemapper/main.go

@@ -28,6 +28,7 @@ func main() {
 		transparent          bool
 		cpuProfile           string
 		transparentDim       float64
+		version              bool
 	)
 
 	flag.IntVar(&port, "port", 6379, "port to of mtredisalize server")
@@ -51,9 +52,14 @@ func main() {
 		&transparentDim, "transparent-dim", common.DefaultTransparentDim*100,
 		"Extra dimming of transparent nodes every depth meter in percent (0-100).")
 	flag.StringVar(&cpuProfile, "cpuprofile", "", "write cpu profile to file")
+	flag.BoolVar(&version, "version", false, "Print version and exit.")
 
 	flag.Parse()
 
+	if version {
+		common.PrintVersionAndExit()
+	}
+
 	if cpuProfile != "" {
 		f, err := os.Create(cpuProfile)
 		if err != nil {

cmd/mtwebmapper/main.go

@@ -31,6 +31,7 @@ func main() {
 		updateHosts    string
 		websockets     bool
 		playersFIFO    string
+		version        bool
 	)
 	flag.IntVar(&webPort, "web-port", 8808, "port of the web server")
 	flag.IntVar(&webPort, "p", 8808, "port of the web server (shorthand)")
@@ -63,9 +64,14 @@ func main() {
 	flag.BoolVar(&websockets, "ws", false, "Forward tile changes to clients via websockets (shorthand).")
 	flag.StringVar(&playersFIFO, "players", "", "Path to FIFO file to read active players from.")
 	flag.StringVar(&playersFIFO, "ps", "", "Path to FIFO file to read active players from (shorthand).")
+	flag.BoolVar(&version, "version", false, "Print version and exit.")
 
 	flag.Parse()
 
+	if version {
+		common.PrintVersionAndExit()
+	}
+
 	router := mux.NewRouter()
 
 	subBaseLine := newSubBaseLine(mapDir)

common/version.go

@@ -0,0 +1,17 @@
+// Copyright 2014 by Sascha L. Teichmann
+// Use of this source code is governed by the MIT license
+// that can be found in the LICENSE file.
+
+package common
+
+import (
+	"fmt"
+	"os"
+)
+
+const MTSatelliteVersion = "0.5"
+
+func PrintVersionAndExit() {
+	fmt.Printf("Version: %s\n", MTSatelliteVersion)
+	os.Exit(0)
+}