linux: Automatic modDirVersion / branch

[NeQuissimus]

Motivation for this change

This allows for meta.branch and modDirVersion to be determined automatically.

Things done

• Tested using sandboxing (nix.useSandbox on NixOS, or option build-use-sandbox in nix.conf on non-NixOS)
• Built on platform(s)
  • NixOS
  • macOS
  • other Linux distributions
• Tested via one or more NixOS test(s) if existing and applicable for the change (look inside nixos/tests)
• Tested compilation of all pkgs that depend on this change using nix-shell -p nox --run "nox-review wip"
• Tested execution of all binary files (usually in ./result/bin/)
• Fits CONTRIBUTING.md.

---

[NeQuissimus]

@GrahamcOfBorg build linuxPackages_4_13.kernel

[NeQuissimus]

Paging the Borg Queen @grahamc since I don't think the drone listens to me :D

[grahamc]

@NeQuissimus may I recommend you try again? :)

[NeQuissimus]

@GrahamcOfBorg build linux_4_9
linux_4_13
linux_4_14

[GrahamcOfBorg]

Failure for system: x86_64-darwin

error: assertion failed at /tmp/nix-ofborg/repo/38dca4e3aa6bca43ea96d2fcc04e8229/builder/31610/pkgs/os-specific/linux/kernel/generic.nix:32:1

[GrahamcOfBorg]

Success for system: x86_64-linux

wrong ELF type
wrong ELF type
wrong ELF type
wrong ELF type
wrong ELF type
wrong ELF type
wrong ELF type
/nix/store/529vla80wpq18rac310krywbsx7k8mmc-linux-4.9.64
/nix/store/zijd4qgxydqg1p3bl1q833bihw0smnl7-linux-4.13.15
/nix/store/nwnw1ljh7zwmcy7i09q2ck9b61kdkagz-linux-4.14.1

[teto]

I have to add a "+" to modDirVersion currently (I suppose because it's not a tagged kernel release ?!), this doesn't seem to be possible there, does it ?

[NeQuissimus]

You can still override modVersion

[teto]

Would you mind rebasing ? I consistently hit the problem so that would be a nice addition to nixpkgs.

[teto]

Tried rebasing at https://github.com/teto/nixpkgs/tree/moddir. It won't work when modifying kernel config with a custom LOCALVERSION.

[NeQuissimus]

If somebody wants to give this a shot, you are most welcome. I am closing this as it is far outdated...