Support for APFS deduplication

[valenokk]

Thank you for your wonderful tool. Will it be hard to support APFS deduplication? macOS support clonefile(2) system call since 10.12, which lets to deduplicate in a similar way as btrfs.

I think I can work on PR, but frankly I don't have much experience in open-source development.

[sahib]

Hello @valenokk,

adding support for APFS would be certainly possible, but I can't really do it on my side since I have no apple machine to test on. There are a few things you need to do:

• Add apfs here: https://github.com/sahib/rmlint/blob/2a4443d1b8129736adee5edc354e80e5f12be598/lib/utilities.c#L582
• Implement the actual call to clonefile(2) here: https://github.com/sahib/rmlint/blob/2a4443d1b8129736adee5edc354e80e5f12be598/lib/session.c#L207
• Check if this works for apfs: https://github.com/sahib/rmlint/blob/2a4443d1b8129736adee5edc354e80e5f12be598/lib/utilities.c#L1161
• ...possibly more.

Here is some general intro on how to work on changes for rmlint.

Good luck.

[sahib]

Closing for now. Please re-open when there are news.