Add version information in build and improve arg parsing

cmd/main.go

@@ -11,12 +11,11 @@ import (
 	"github.com/zMoooooritz/nachrichten/pkg/util"
 )
 
-func Run() {
+func Run(configFile string, logFile string) {
 
-	cfg := config.Init()
-	configuration := cfg.Load()
-	if cfg.LogFile != "" {
-		err := util.SetLogFile(cfg.LogFile)
+	configuration := config.Load(configFile)
+	if logFile != "" {
+		err := util.SetLogFile(logFile)
 		log.Fatalln("Error occoured while setting up logger: ", err)
 	}
 	util.Logger.Println("Application started.")
@@ -26,7 +25,7 @@ func Run() {
 		// tea.WithMouseCellMotion(),
 	)
 	if _, err := p.Run(); err != nil {
-		fmt.Printf("Alas, there's been an error: %v", err)
+		fmt.Printf("There's been an error: %v", err)
 		os.Exit(1)
 	}
 }

main.go

@@ -1,7 +1,42 @@
 package main
 
-import "github.com/zMoooooritz/nachrichten/cmd"
+import (
+	"flag"
+	"fmt"
+	"os"
+
+	"github.com/zMoooooritz/nachrichten/cmd"
+)
+
+var (
+	// Set via ldflags when building
+	Version   = ""
+	CommitSHA = ""
+
+	configFile = flag.String("config", "", "Path to configuration file")
+	logFile    = flag.String("debug", "", "Path to log file")
+	version    = flag.Bool("version", false, "Display version")
+)
 
 func main() {
-	cmd.Run()
+	flag.Parse()
+
+	if *version {
+		if len(CommitSHA) > 7 {
+			CommitSHA = CommitSHA[:7]
+		}
+		if Version == "" {
+			Version = "(built from source)"
+		}
+
+		fmt.Printf("nachrichten %s", Version)
+		if len(CommitSHA) > 0 {
+			fmt.Printf(" (%s)", CommitSHA)
+		}
+
+		fmt.Println()
+		os.Exit(0)
+	}
+
+	cmd.Run(*configFile, *logFile)
 }

pkg/config/config.go

@@ -1,7 +1,6 @@
 package config
 
 import (
-	"flag"
 	"os"
 
 	"gopkg.in/yaml.v3"
@@ -50,28 +49,10 @@ const (
 	TypeHTML
 )
 
-type Config struct {
-	ConfigFile string
-	LogFile    string
-}
-
-func Init() Config {
-
-	configFile := flag.String("config", "", "Path to configuration file")
-	logFile := flag.String("debug", "", "Path to log file")
-
-	flag.Parse()
-	cfg := Config{
-		ConfigFile: *configFile,
-		LogFile:    *logFile,
-	}
-	return cfg
-}
-
-func (c Config) Load() Configuration {
+func Load(configFile string) Configuration {
 	config := defaultConfiguration()
 
-	data, err := os.ReadFile(c.ConfigFile)
+	data, err := os.ReadFile(configFile)
 	if err != nil {
 		return config
 	}