dotfiles/system-nix/nixos-wsl/modules/wsl-distro.nix

140 lines
4.4 KiB
Nix

{ lib, pkgs, config, ... }:
with builtins; with lib;
{
options.wsl = with types;
let
coercedToStr = coercedTo (oneOf [ bool path int ]) (toString) str;
in
{
enable = mkEnableOption "support for running NixOS as a WSL distribution";
automountPath = mkOption {
type = str;
default = "/mnt";
description = "The path where windows drives are mounted (e.g. /mnt/c)";
};
automountOptions = mkOption {
type = str;
default = "metadata,uid=1000,gid=100";
description = "Options to use when mounting windows drives";
};
defaultUser = mkOption {
type = str;
default = "nixos";
description = "The name of the default user";
};
startMenuLaunchers = mkEnableOption "shortcuts for GUI applications in the windows start menu";
wslConf = mkOption {
type = attrsOf (attrsOf (oneOf [ string int bool ]));
description = "Entries that are added to /etc/wsl.conf";
};
};
config =
let
cfg = config.wsl;
syschdemd = import ../syschdemd.nix { inherit lib pkgs config; inherit (cfg) automountPath defaultUser; defaultUserHome = config.users.users.${cfg.defaultUser}.home; };
in
mkIf cfg.enable {
wsl.wslConf = {
automount = {
enabled = true;
mountFsTab = true;
root = "${cfg.automountPath}/";
options = cfg.automountOptions;
};
network = {
generateResolvConf = mkDefault true;
generateHosts = mkDefault true;
};
};
# WSL is closer to a container than anything else
boot.isContainer = true;
environment.noXlibs = lib.mkForce false; # override xlibs not being installed (due to isContainer) to enable the use of GUI apps
hardware.opengl.enable = true; # Enable GPU acceleration
environment = {
etc = {
"wsl.conf".text = generators.toINI { } cfg.wslConf;
# DNS settings are managed by WSL
hosts.enable = !config.wsl.wslConf.network.generateHosts;
"resolv.conf".enable = !config.wsl.wslConf.network.generateResolvConf;
};
systemPackages = [
(pkgs.runCommand "wslpath" { } ''
mkdir -p $out/bin
ln -s /init $out/bin/wslpath
'')
];
};
networking.dhcpcd.enable = false;
users.users.${cfg.defaultUser} = {
isNormalUser = true;
uid = 1000;
extraGroups = [ "wheel" ]; # Allow the default user to use sudo
};
users.users.root = {
shell = "${syschdemd}/bin/syschdemd";
# Otherwise WSL fails to login as root with "initgroups failed 5"
extraGroups = [ "root" ];
};
security.sudo = {
extraConfig = ''
Defaults env_keep+=INSIDE_NAMESPACE
'';
wheelNeedsPassword = mkDefault false; # The default user will not have a password by default
};
system.activationScripts = {
copy-launchers = mkIf cfg.startMenuLaunchers (
stringAfter [ ] ''
for x in applications icons; do
echo "Copying /usr/share/$x"
mkdir -p /usr/share/$x
${pkgs.rsync}/bin/rsync -ar --delete $systemConfig/sw/share/$x/. /usr/share/$x
done
''
);
populateBin = stringAfter [ ] ''
echo "setting up /bin..."
ln -sf /init /bin/wslpath
ln -sf ${pkgs.bashInteractive}/bin/bash /bin/sh
ln -sf ${pkgs.util-linux}/bin/mount /bin/mount
'';
};
systemd = {
# Disable systemd units that don't make sense on WSL
services = {
"serial-getty@ttyS0".enable = false;
"serial-getty@hvc0".enable = false;
"getty@tty1".enable = false;
"autovt@".enable = false;
firewall.enable = false;
systemd-resolved.enable = false;
systemd-udevd.enable = false;
};
tmpfiles.rules = [
# Don't remove the X11 socket
"d /tmp/.X11-unix 1777 root root"
];
# Don't allow emergency mode, because we don't have a console.
enableEmergencyMode = false;
};
warnings = (optional (config.systemd.services.systemd-resolved.enable && config.wsl.wslConf.network.generateResolvConf) "systemd-resolved is enabled, but resolv.conf is managed by WSL");
};
}