feat: add flake.nix

[XYenon]

Close #189

[sxyazi]

Thank you!

[teto]

This project feels magical, issues get solved almost before being created <3
First good news this works !

A question, would it be better to show the git version here ?

nix run github:sxyazi/yazi -- --version
yazi 0.1.4

or maybe the commit in the version ?

ls -l result
lrwxrwxrwx 1 teto users 52 09-22 14:31 result -> /nix/store/ci5kbaxjndg6jj6ikvcmm1kra8sibjq1-yazi-git

Other question, last time I packaged a rust flake, changing the lockfile was a pain because it required updating a cargoDepsHash in the buildRustPackage call, this doesn't seem to be the case anymore ? (which is a good news).

thanks to you both

[XYenon]

A question, would it be better to show the git version here ?

nix run github:sxyazi/yazi -- --version
yazi 0.1.4

or maybe the commit in the version ?

ls -l result
lrwxrwxrwx 1 teto users 52 09-22 14:31 result -> /nix/store/ci5kbaxjndg6jj6ikvcmm1kra8sibjq1-yazi-git

I have created a pr to add this. And I want to know are there any other optimizations?

Other question, last time I packaged a rust flake, changing the lockfile was a pain because it required updating a cargoDepsHash in the buildRustPackage call, this doesn't seem to be the case anymore ? (which is a good news).

Yeah, I found buildRustPackage can read Cargo.lock directly. I hope other languages can also have this ability.

[teto]

I just tried to launch a nix shell and got

       error: devenv was not able to determine the current directory.
       Make sure Nix runs with the `--impure` 

I have launched hundreds of different nix shells and it's the first time I am asked for the impure flag (admittedly it's the first time I see one using devenv). I think we lose the nixpkgs evaluation cache + reproducibility properties. Isn't there some way we can get rid of devenv ?

[XYenon]

I just tried to launch a nix shell and got

       error: devenv was not able to determine the current directory.
       Make sure Nix runs with the `--impure` 

I have launched hundreds of different nix shells and it's the first time I am asked for the impure flag (admittedly it's the first time I see one using devenv). I think we lose the nixpkgs evaluation cache + reproducibility properties. Isn't there some way we can get rid of devenv ?

I have refactor it to avoid impure, could you give a review?
#293