peterdemaeyer opened a new pull request, #827:
URL: https://github.com/apache/commons-io/pull/827
Defined the behavior of `PathUtils.copyDirectory` for symbolic links. It
depends on the option `LinkOption.NOFOLLOW_LINKS`. Non-symbolic (hard) links
are out of scope, given that the copy behavior for them was already
well-defined: they're treated as regular files.
For the sake of conciseness, the following paragraphs use the term "link"
for "symbolic link".
Without `NOFOLLOW_LINKS` option:
- Links are followed, so that there are no links in the target directory.
- Cyclic links result in `FileSystemLoopException`.
- Broken links are ignored, they are not copied at all.
With `NOFOLLOW_LINKS` option:
- Links are copied as links, so that there are links in the target directory
for every link in the source directory.
- Links that link to a file or directory inside the source directory are
copied to relative links inside the target directory, linking to the copied
file or directory.
- Links that link to a file or directory outside the source directory are
copied to links inside the target directory, linking to the same file or
directory as the link in the source directory.
- Cyclic links are preserved, mirrored to cyclic links in the target
directory.
- Broken links are ignored, they are not copied at all.
All of this is also explained in the updated JavaDoc.
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