add some info to exe

src/build.sh

@@ -1,4 +1,11 @@
 #!/bin/bash
 
+
+if [ -z ${1+x} ]; then
+  VERSION="0.0.0"
+else
+  VERSION="$1"
+fi
+
 mkdir -p ../dist
-go build -v -trimpath -ldflags "-s -w" -tags "$(date -u)" -o ../dist/crazyfs
+go build -v -trimpath -ldflags "-s -w -X main.VersionDate=$(date -u --iso-8601=minutes) -X main.Version=v$VERSION" -o ../dist/crazyfs

src/crazyfs.go

@@ -16,6 +16,7 @@ import (
 	"net/http"
 	"os"
 	"path/filepath"
+	"runtime/debug"
 	"time"
 )
 
@@ -27,8 +28,12 @@ type cliConfig struct {
 	debug              bool
 	disableElasticSync bool
 	help               bool
+	version            bool
 }
 
+var Version = "development"
+var VersionDate = "not set"
+
 // TODO: optional serving of frontend
 // TODO: admin api to clear cache, get number of items in cache, get memory usage
 // TODO: health api endpoint that tells us if the server is still starting
@@ -37,13 +42,31 @@ type cliConfig struct {
 // TODO: admin api endpoint to get status and progress of the full refresh of elasticsearch
 
 func main() {
+	fmt.Println("=== Crazy File Server ===")
 	cliArgs := parseArgs()
 	if cliArgs.help {
 		flag.Usage()
 		os.Exit(0)
 	}
+	if cliArgs.version {
+		buildInfo, ok := debug.ReadBuildInfo()
+
+		if ok {
+			buildSettings := make(map[string]string)
+			for i := range buildInfo.Settings {
+				buildSettings[buildInfo.Settings[i].Key] = buildInfo.Settings[i].Value
+			}
+			fmt.Printf("Version: %s\n\n", Version)
+			fmt.Printf("Date Compiled: %s\n", VersionDate)
+			fmt.Printf("Git Revision: %s\n", buildSettings["vcs.revision"])
+			fmt.Printf("Git Revision Date: %s\n", buildSettings["vcs.time"])
+			fmt.Printf("Git Modified: %s\n", buildSettings["vcs.modified"])
+		} else {
+			fmt.Println("Build info not available")
+		}
+		os.Exit(0)
+	}
 
-	fmt.Println("=== Crazy File Server ===")
 	if cliArgs.debug {
 		logging.InitLogger(logrus.DebugLevel)
 	} else {
@@ -163,12 +186,13 @@ func main() {
 
 func parseArgs() cliConfig {
 	var cliArgs cliConfig
-	flag.StringVar(&cliArgs.configFile, "config", "", "StartPath to the config file")
+	flag.StringVar(&cliArgs.configFile, "config", "", "Path to the config file")
 	flag.BoolVar(&cliArgs.initialCrawl, "initial-crawl", false, "Do an initial crawl to fill the cache")
 	flag.BoolVar(&cliArgs.initialCrawl, "i", false, "Do an initial crawl to fill the cache")
 	flag.BoolVar(&cliArgs.debug, "d", false, "Enable debug mode")
 	flag.BoolVar(&cliArgs.debug, "debug", false, "Enable debug mode")
 	flag.BoolVar(&cliArgs.disableElasticSync, "disable-elastic-sync", false, "Disable the Elasticsearch background sync thread")
+	flag.BoolVar(&cliArgs.version, "v", false, "Print version and exit")
 	flag.Parse()
 	return cliArgs
 }