SATA link speeds

[peterdk]

Expanded a bit on the PCIe Link code to also support SATA speeds.

It was quite hard to get the actual ata_link property from sysfs. The only way I could find to get the ata device and then link was through reading the actual symlink for a /sys/class/block/x device and then finding the \ataXX\ path and then the linkXX subdir of it. Which is somewhat hacky, but I am also too novice in Rust to make it less verbose. So feel free to suggest some changes there.

I added a dependency, which seemed lightweight. It is used to be able to navigate to a joined Path with ../../ from the symlink in it.

[peterdk]

[nokyan]

Hi, thanks a lot, that's really cool and works really well!

I managed to make a few code segments more compact, I hope you don't mind that I pushed it to your branch. :)
Those segments were mostly error handling, function chaining and using generics for &PathBuf and &str.

Are you fine with that?

[peterdk]

Ah cool, this and_then() stuff is interesting! And nice to put the regexes as single init constants.

Yeah very nice! Thanks.

[peterdk]

I'll look into adding USB link info in a following PR. Seems also quite easy, and then I think the most important Link types are present.

[nokyan]

I'll look into adding USB link info in a following PR. Seems also quite easy, and then I think the most important Link types are present.

Sounds nice, looking forward to it!

[peterdk]

So could you explain why the Generics for PathBuf? And why the &str use with Path.as_ref()?

[nokyan]

So could you explain why the Generics for PathBuf? And why the &str use with Path.as_ref()?

It doesn't functionally change anything but allows anything that by referencing it can be turned to a &str or Path to be used with the function. Makes reusing the function more ergonomic in cases. For example, a function that accepts AsRef<str> can take a String, &String or &str as an argument without the caller needing to do anything.
The .as_ref() call is defined in the AsRef<T> trait and turns whatever type has been supplied to the function to &str or Path.