Remote control launch: Fix the --copy-env option not copying current environment variables

Fixes #6724

tools/cmd/at/launch.go

@@ -0,0 +1,26 @@
+// License: GPLv3 Copyright: 2023, Kovid Goyal, <kovid at kovidgoyal.net>
+
+package at
+
+import (
+	"fmt"
+	"os"
+)
+
+var _ = fmt.Print
+
+func copy_local_env(copy_env bool) []string {
+	if copy_env {
+		return os.Environ()
+	}
+	return nil
+}
+
+func copy_local_cwd(copy_cwd string) string {
+	if copy_cwd == "current" {
+		if c, e := os.Getwd(); e == nil {
+			copy_cwd = c
+		}
+	}
+	return copy_cwd
+}