Support specifying target path for xpst()

dotfiles/config/bashum/main.bashrc

@@ -645,6 +645,11 @@ xpst() {
     #
     # Paste paths from clipboard
     #
+    local target_path="${1:-.}"
+    test -d "$target_path" || {
+        echo >&2 "no such directory: $target_path"
+        return 2
+    }
     { xop o; echo; } \
       | while read -r path; do
             echo "path='$path'" >&2
@@ -652,7 +657,7 @@ xpst() {
                 echo "does not exist: $path"
                 continue
             }
-            cp -ar "$path" .
+            cp -ar "$path" "$target_path"
         done
 }