feat: show version in command description

main.go

@@ -1,7 +1,6 @@
 package main
 
 import (
-	"bufio"
 	"context"
 	_ "embed"
 	"errors"
@@ -28,14 +27,8 @@ var (
 
 func main() {
 	parser := flags.NewParser(&opts, flags.Default)
-	parser.Usage = `[OPTIONS]
-
-Description:`
-	scanner := bufio.NewScanner(strings.NewReader(strings.TrimPrefix(readme, "# wghttp\n")))
-	for scanner.Scan() {
-		parser.Usage += "  " + scanner.Text() + "\n"
-	}
-	parser.Usage = strings.TrimSuffix(parser.Usage, "\n")
+	parser.LongDescription = fmt.Sprintf("wghttp %s\n\n", version())
+	parser.LongDescription += strings.Trim(strings.TrimPrefix(readme, "# wghttp"), "\n")
 	if _, err := parser.Parse(); err != nil {
 		code := 1
 		fe := &flags.Error{}

stats.go

@@ -29,11 +29,7 @@ func stats(dev *device.Device) func() (any, error) {
 			Version      string
 		}{
 			NumGoroutine: runtime.NumGoroutine(),
-		}
-
-		info, ok := debug.ReadBuildInfo()
-		if ok {
-			stats.Version = info.Main.Version
+			Version:      version(),
 		}
 
 		scanner := bufio.NewScanner(&buf)
@@ -55,3 +51,11 @@ func stats(dev *device.Device) func() (any, error) {
 		return stats, nil
 	}
 }
+
+func version() string {
+	info, ok := debug.ReadBuildInfo()
+	if ok {
+		return info.Main.Version
+	}
+	return "(devel)"
+}