65 lines
1.4 KiB
Nix
65 lines
1.4 KiB
Nix
{ config, lib, pkgs, ... }:
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with lib;
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let
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pkg = if config.hardware.sane.snapshot
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then pkgs.sane-backends-git
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else pkgs.sane-backends;
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backends = [ pkg ] ++ config.hardware.sane.extraBackends;
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saneConfig = pkgs.mkSaneConfig { paths = backends; };
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in
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{
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###### interface
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options = {
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hardware.sane.enable = mkOption {
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type = types.bool;
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default = false;
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description = "Enable support for SANE scanners.";
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};
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hardware.sane.snapshot = mkOption {
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type = types.bool;
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default = false;
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description = "Use a development snapshot of SANE scanner drivers.";
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};
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hardware.sane.extraBackends = mkOption {
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type = types.listOf types.path;
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default = [];
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description = "Packages providing extra SANE backends to enable.";
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};
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hardware.sane.configDir = mkOption {
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type = types.string;
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description = "The value of SANE_CONFIG_DIR.";
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};
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};
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###### implementation
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config = mkIf config.hardware.sane.enable {
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hardware.sane.configDir = mkDefault "${saneConfig}/etc/sane.d";
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environment.systemPackages = backends;
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environment.sessionVariables = {
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SANE_CONFIG_DIR = config.hardware.sane.configDir;
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LD_LIBRARY_PATH = [ "${saneConfig}/lib/sane" ];
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};
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services.udev.packages = backends;
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users.extraGroups."scanner".gid = config.ids.gids.scanner;
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};
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}
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