Adding fvwm to the list of available window managers. [needs attention]

[noisecrew]

Hello;
trying to add

    xserver.desktopManager.default = "none";
    xserver.desktopManager.fvwm.enable = false;
    xserver.windowManager.default = "fvwm";
    xserver.windowManager.fvwm.enable = true;

causes to return errors about the service doesn't exist. So please add them.
this option is needed to set fvwm for display-managers like lightdm or sddm.
Thanks

• Linux noisecrew 4.9.17 Compile glibc without -fstack-protector. #1-NixOS SMP Wed Mar 22 11:44:07 UTC 2017 x86_64 GNU/Linux

• nix-env (Nix) 1.11.8

[edanaher]

FYI, you can do this yourself (as I have been):

    services.xserver.desktopManager.default = "fvwm";
    services.xserver.desktopManager.session =
      [ { manage = "desktop";
          name = "fvwm";
          start = ''
            ${fvwm}/bin/fvwm &
            waitPID=$!
          '';
        }
      ];

However, now that I'm not just getting started with Nix, I should really commit that... I'll add it as my next nixpkgs TODO.

[noisecrew]

rror: undefined variable ‘fvwm’ at /etc/nixos/services.nix:20:15
(use ‘--show-trace’ to show detailed location information)
building Nix...
error: undefined variable ‘fvwm’ at /etc/nixos/services.nix:20:15
(use ‘--show-trace’ to show detailed location information)
building the system configuration...
error: undefined variable ‘fvwm’ at /etc/nixos/services.nix:20:15
(use ‘--show-trace’ to show detailed location information)

[edanaher]

Ah; I had a bit of other infrastructure that I filtered out. Try using ${pkgs.fvwm} instead?

[noisecrew]

${pkgs.fvwm} didn't help

wouldn't be better to add it to nixos tree. like jwm, bspwm, ... and all other WMs.

[noisecrew]

cc @ttuegel

[lheckemann]

Given that the module has now been added and is available in nixos-unstable, I think this issue can be closed?