FileUtils.copyDirectory() used Files.copy() for all entries including directories. When the destination is an existing directory (like PWD), Files.copy with REPLACE_EXISTING replaces the directory inode, corrupting it. Fixed by using Files.createDirectories() for directory entries and Files.copy() only for files. Added test verifying copyDirectory to PWD works correctly.
--------- - [x] I confirm that I make this contribution in accordance with the [OpenJDK Interim AI Policy](https://openjdk.org/legal/ai). ------------- Commit messages: - 8355320: FileUtils.copyDirectory() corrupts existing directory Changes: https://git.openjdk.org/jdk/pull/31444/files Webrev: https://webrevs.openjdk.org/?repo=jdk&pr=31444&range=00 Issue: https://bugs.openjdk.org/browse/JDK-8355320 Stats: 37 lines in 2 files changed: 32 ins; 0 del; 5 mod Patch: https://git.openjdk.org/jdk/pull/31444.diff Fetch: git fetch https://git.openjdk.org/jdk.git pull/31444/head:pull/31444 PR: https://git.openjdk.org/jdk/pull/31444
