Ant正在复制哪些“空目录”?

正在创建目录 com/foo/bar 意味着先创造 com 然后 com/foo -即三个目录。

我的Ant版本稍微详细一点,显示了每个创建操作:

$ ant -v
Apache Ant(TM) version 1.10.2 compiled on February 3 2018
... deleted for brevity ....
    [mkdir] Created dir: /stack/ant/dst
     [copy] com/foo/bar2/x.txt added as com/foo/bar2/x.txt doesn't exist.
     [copy]  omitted as /stack/ant/dst is up to date.
1    [copy] com added as com doesn't exist.
2    [copy] com/foo added as com/foo doesn't exist.
3    [copy] com/foo/bar added as com/foo/bar doesn't exist.
4    [copy] com/foo/bar2 added as com/foo/bar2 doesn't exist.
     [copy] Copying 1 file to /stack/ant/dst
     [copy] Copying /stack/ant/src/com/foo/bar2/x.txt to /stack/ant/dst/com/foo/bar2/x.txt
     [copy] Copied 4 empty directories to 1 empty directory under /stack/ant/dst

什么时候? bar2 创建时,它(显然)是空的,因此包含在四个计数中,即使在复制完成时它是非空的。