Code to get exe name for usage message

tools/utils/misc.go

@@ -0,0 +1,23 @@
+// License: GPLv3 Copyright: 2022, Kovid Goyal, <kovid at kovidgoyal.net>
+
+package utils
+
+import (
+	"fmt"
+)
+
+var _ = fmt.Print
+
+func Reverse[T any](s []T) {
+	for i, j := 0, len(s)-1; i < j; i, j = i+1, j-1 {
+		s[i], s[j] = s[j], s[i]
+	}
+}
+
+func Reversed[T any](s []T) []T {
+	ans := make([]T, len(s))
+	for i, x := range s {
+		ans[len(s)-1-i] = x
+	}
+	return ans
+}