This fixes#7314 and #7778.
The problem was copying a folder into itself, which is actually quite a
common operation in macOS's `Finder.app`: you select a folder, hit
`cmd-c` and `cmd-v` and have a copy. That's also how it works in VS
Code.
The fix here is to detect when we're copying a folder into itself and
treating it like we're copying a file into itself: we don't want to copy
into the target, we want to copy into the folder one level higher up,
which will then automatically add a ` copy` to the end of the name.
Release Notes:
- Fixed ability to copy folders into themselves by selecting them in
project panel and hitting `copy` and `paste`. Instead of endless
recursion, a copy of the folder is now created.
([#7314](https://github.com/zed-industries/zed/issues/7314)).
Demo:
https://github.com/zed-industries/zed/assets/1185253/2141310a-991d-491d-8498-eb766275a1f5
Thorsten Ball
7acd6879db