refactor: use executable file path instead of pwd

cmd/main.go

@@ -10,24 +10,30 @@ import (
 	"mpwt/internal/tui"
 	"mpwt/pkg/log"
 	"os"
+	"path/filepath"
 )
 
 func main() {
 	// Identify application enviroment (development/production)
 	debug := flag.Bool("debug", false, "Enable debug mode")
 	flag.Parse()
 
+	// Get executable path
+	exeDir, err := getExecDirectory()
+	if err != nil {
+		panic(fmt.Errorf("failed to get executable directory: %v", err))
+	}
+
 	// Intialize logger and set config file path based on application environment
-	pwd, _ := os.Getwd()
-	configPath := pwd
+	configPath := ""
 	if *debug {
-		configPath += "/config/config.dev.yaml"
+		configPath = filepath.Join(exeDir, "/config/config.dev.yaml")
 		log.NewLog(log.EnvDevelopment)
 	} else {
-		configPath += "/config.yaml"
-		file, err := os.OpenFile(pwd+"/mpwt.log", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
+		configPath = filepath.Join(exeDir, "/config.yaml")
+		file, err := os.OpenFile(exeDir+"/mpwt.log", os.O_CREATE|os.O_WRONLY|os.O_APPEND, 0666)
 		if err != nil {
-			panic(fmt.Sprintf("Failed to create log file: %v", err))
+			panic(fmt.Errorf("failed to create log file: %v", err))
 		}
 		defer file.Close()
 
@@ -42,7 +48,7 @@ func main() {
 	}
 
 	// Initialize database connection
-	r, err := repository.NewDbConn(pwd + "/mpwt.db")
+	r, err := repository.NewDbConn(exeDir + "/mpwt.db")
 	if err != nil {
 		log.Fatal(fmt.Errorf("failed to initialize sqlite: %v", err))
 	}
@@ -67,3 +73,20 @@ func main() {
 		log.Fatal(fmt.Errorf("failed to run tui: %v", err))
 	}
 }
+
+// getExecDirectory returns the directory containing the application executable
+func getExecDirectory() (string, error) {
+	exePath, err := os.Executable()
+	if err != nil {
+		return "", fmt.Errorf("failed to retrieve executable path: %v", err)
+	}
+
+	// Evaluate symlinks to prevent unstable result from os.Executable
+	resolvedPath, err := filepath.EvalSymlinks(exePath)
+	if err != nil {
+		return "", fmt.Errorf("failed to resolve symlink: %v", err)
+	}
+
+	// Get the directory of the resolved executable
+	return filepath.Dir(resolvedPath), nil
+}