while creating a snapcraft package within a docker image with a mounted mac volume I encountered a weird error: ``` Staging authpass Sorry, an error occurred in Snapcraft: [Errno 17] File exists: 'libbsd.so.0.8.7' -> '/code/authpass/stage/lib/x86_64-linux-gnu/libbsd.so.0' ``` It seems like on a mounted mac volume a hard link created for a symlink behaves weirdly (throws an error, but still creates the link). Although I'm not sure what the expected behaviour is. imho the expected behavior would be: if there is a symlink in the source folder, that there is a symlink in the destination folder. So my fix does exactly that. And with this fix the snapcraft build succeeded for me. The problem can be reproduced even without python, just on the commandline in a docker running on mac: ``` root@1051363b90ac:/home/authpass/tmp# touch first ; ln -s first symlink ; ln symlink hardlink ln: failed to create hard link 'hardlink' => 'symlink': Input/output error root@1051363b90ac:/home/authpass/tmp# ls -l total 0 -rw-r--r-- 2 root root 0 Jun 13 10:53 first -rw-r--r-- 2 root root 0 Jun 13 10:53 hardlink lrwxrwxrwx 1 root root 5 Jun 13 10:53 symlink -> first ``` creating a hardlink to the symlink throws an error, but still creates a file. In the python code this results in an exception being thrown, and falls back to copying the file, which fails with 'already exists'. - [ ] Have you followed the [guidelines for contributing](https://github.com/snapcore/snapcraft/blob/master/CONTRIBUTING.md)? - [ ] Have you signed the [CLA](http://www.ubuntu.com/legal/contributors/)? - [ ] Have you successfully run `./runtests.sh static`? - [ ] Have you successfully run `./runtests.sh tests/unit`?