benlangmuir added a comment.
Please clarify what you mean here:
> The rationale is that if source and destination paths in the YAML file
> contain ".." this is enough
> for the file manager to retrieve the right file, meaning that it doesn't
> matter how we write it
> since the FileManager is capable of transforming it in real/feasible paths.
The VFS layer does not have access to the FileManager. I agree that ".." in a
destination path should be fine. But ".." in a source path will only work if
we have code in the redirecting file system to handle ".." explicitly, which
AFAICT we don't:
RedirectingFileSystem::lookupPath(sys::path::const_iterator Start,
sys::path::const_iterator End, Entry *From)
{
if (Start->equals("."))
++Start;
// FIXME: handle ..
http://reviews.llvm.org/D17104
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