don't log.Fatal if we can't read version...

main.go

@@ -4,6 +4,7 @@ package main
 import (
 	"context"
 	"os"
+	"runtime/debug"
 	"strings"
 
 	"github.com/charmbracelet/fang"
@@ -56,7 +57,19 @@ func init() {
 // main is the entry point of the application.
 // It executes the root command and handles any errors.
 func main() {
-	if err := fang.Execute(context.Background(), rootCmd, fang.WithVersion(version)); err != nil {
+	if err := fang.Execute(context.Background(), rootCmd, fang.WithVersion(versionFromBuild())); err != nil {
 		os.Exit(1)
 	}
 }
+
+func versionFromBuild() string {
+	if version == "" {
+		info, ok := debug.ReadBuildInfo()
+		if !ok {
+			return "(unable to read version)"
+		}
+		version = strings.Split(info.Main.Version, "-")[0]
+	}
+
+	return version
+}