feat: set version from git tag on build

- add version variable and default it to "devel"
- add ldflags to `.goreleaser.yaml` for version tagging

.goreleaser.yaml

@@ -15,6 +15,8 @@ builds:
       - arm64
     env:
       - CGO_ENABLED=0
+    ldflags:
+      - -s -w -X git.smsvc.net/pomodoro/ChronoTomato/cmd/client.version={{.Version}}
 
 upx:
   - enabled: true

cmd/client/app.go

@@ -2,6 +2,8 @@ package client
 
 import (
 	"flag"
+	"fmt"
+	"os"
 
 	"git.smsvc.net/pomodoro/ChronoTomato/internal/helper"
 	"git.smsvc.net/pomodoro/ChronoTomato/internal/websocket"
@@ -13,6 +15,7 @@ import (
 )
 
 var (
+	version = "devel"
 	config  ChronoTomato.Config
 	client  websocket.Client
 )
@@ -68,9 +71,15 @@ func Start() {
 		parameter_url        = flag.String("url", "", "GoTomato Server URL (eg ws://localhost:8080/ws)")
 		parameter_password   = flag.String("password", "", "Control password for pomodoro session")
 		parameter_configfile = flag.String("config", defaultConfigFile, "Path to config file")
+		showVersion          = flag.Bool("version", false, "Show Version")
 	)
 	flag.Parse()
 
+	if *showVersion {
+		fmt.Println("ChronoTomato", version)
+		os.Exit(0)
+	}
+
 	// read passed config file or try to use default config
 	if *parameter_configfile != defaultConfigFile {
 		config = helper.ParseConfig(*parameter_configfile)