cksum: Add --raw argument

[D9nni]

Should close #5708

This adds the --raw argument. I also added the CkSumError enum to handle error of RawMultipleFiles.

--raw emit a raw binary digest, not hexadecimal

[sylvestre]

Could you please add tests in https://github.com/uutils/coreutils/blob/main/tests/by-util/test_cksum.rs ? thanks

[D9nni]

I added the tests, but I have a problem with test_raw_single_file, it tells me that opening of the expected stdout failed.

[tertsdiepraam]

I think you forgot to commit the raw_single_file.expected file in the tests/fixtures/cksum folder. It can't find a file it doesn't know about :)

[github-actions]

GNU testsuite comparison:

Skipping an intermittent issue tests/tail/inotify-dir-recreate (passes in this run but fails in the 'main' branch)

[D9nni]

Now I made it to work for the other algorithms but it has problems for crc, bsd, and sysv. I think this is because the output for those algorithms isn't generated using encode(). I tried to use parse:: on these cases, but it doesn't seem to work. I will try again, but I would appreciate any suggestions.

[github-actions]

GNU testsuite comparison:

Skip an intermittent issue tests/tail/inotify-dir-recreate (fails in this run but passes in the 'main' branch)

[github-actions]

GNU testsuite comparison:

Congrats! The gnu test tests/cksum/cksum-raw is no longer failing!
Skipping an intermittent issue tests/tail/inotify-dir-recreate (passes in this run but fails in the 'main' branch)

[github-actions]

GNU testsuite comparison:

Congrats! The gnu test tests/cksum/cksum-raw is no longer failing!

[tertsdiepraam]

Now I made it to work for the other algorithms but it has problems for crc, bsd, and sysv. I think this is because the output for those algorithms isn't generated using encode(). I tried to use parse:: on these cases, but it doesn't seem to work. I will try again, but I would appreciate any suggestions.

Is this fixed now? The code looks good to me.

[D9nni]

Now I made it to work for the other algorithms but it has problems for crc, bsd, and sysv. I think this is because the output for those algorithms isn't generated using encode(). I tried to use parse:: on these cases, but it doesn't seem to work. I will try again, but I would appreciate any suggestions.

Is this fixed now? The code looks good to me.

Yes, I fixed it and I think it works fine now.

[sylvestre]

kudos for Congrats! The gnu test tests/cksum/cksum-raw is no longer failing!