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da2923b4f8
Upstream has been providing a very thoroughly designed set of systemd units, udev and polkit rules. With these the brltty daemon is activated asynchronously via udev, runs as a dedicated user with runtime and state directories set up using systemd-tmpfiles. This is much better than the current unit, which runs a single instance as root and pulls in systemd-udev-settle to wait for the hardware.
58 lines
1.2 KiB
Nix
58 lines
1.2 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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cfg = config.services.brltty;
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targets = [
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"default.target" "multi-user.target"
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"rescue.target" "emergency.target"
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];
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genApiKey = pkgs.writers.writeDash "generate-brlapi-key" ''
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if ! test -f /etc/brlapi.key; then
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echo -n generating brlapi key...
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${pkgs.brltty}/bin/brltty-genkey -f /etc/brlapi.key
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echo done
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fi
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'';
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in {
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options = {
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services.brltty.enable = mkOption {
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type = types.bool;
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default = false;
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description = "Whether to enable the BRLTTY daemon.";
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};
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};
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config = mkIf cfg.enable {
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users.users.brltty = {
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description = "BRLTTY daemon user";
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group = "brltty";
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};
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users.groups = {
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brltty = { };
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brlapi = { };
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};
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systemd.services."brltty@".serviceConfig =
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{ ExecStartPre = "!${genApiKey}"; };
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# Install all upstream-provided files
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systemd.packages = [ pkgs.brltty ];
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systemd.tmpfiles.packages = [ pkgs.brltty ];
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services.udev.packages = [ pkgs.brltty ];
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environment.systemPackages = [ pkgs.brltty ];
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# Add missing WantedBys (see issue #81138)
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systemd.paths.brltty.wantedBy = targets;
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systemd.paths."brltty@".wantedBy = targets;
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};
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}
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