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feat(bbuddy): evdev barcode scanner client
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arcnmx
parent
c3cd9b0564
commit
90901a302c
24 changed files with 847 additions and 253 deletions
158
modules/nixos/barcodebuddy-scanner.nix
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158
modules/nixos/barcodebuddy-scanner.nix
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@ -0,0 +1,158 @@
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{
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config,
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lib,
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utils,
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pkgs,
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...
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}: let
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inherit (utils) escapeSystemdPath;
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inherit (lib.options) mkOption mkEnableOption mkPackageOption;
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inherit (lib.modules) mkIf mkMerge mkOptionDefault mkDefault;
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inherit (lib.attrsets) mapAttrs' nameValuePair;
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inherit (lib.lists) optional isList imap0;
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inherit (lib.strings) optionalString concatStringsSep;
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inherit (lib.meta) getExe;
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cfg = config.services.barcodebuddy-scanner;
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toEnvName = key: "BBUDDY_" + key;
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toEnvValue = value:
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if value == true
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then "true"
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else if value == false
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then "false"
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else if isList value
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then concatStringsSep ";" (imap0 (i: v: "${toString i}=${toEnvValue v}") value)
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else toString value;
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toEnvPair = key: value: nameValuePair (toEnvName key) (toEnvValue value);
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in {
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options.services.barcodebuddy-scanner = with lib.types; {
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enable = mkEnableOption "Barcode Buddy scanner";
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package = mkPackageOption pkgs "barcodebuddy-scanner" {
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example = "pkgs.barcodebuddy-scanner-python";
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};
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inputDevice = mkOption {
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type = nullOr path;
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default = null;
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example = "/dev/input/event6";
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};
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serverAddress = mkOption {
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type = nullOr str;
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example = "https://your.bbuddy.url/api/";
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};
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apiKeyPath = mkOption {
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type = nullOr path;
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};
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user = mkOption {
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type = str;
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};
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scanCommand = mkOption {
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type = nullOr path;
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default = null;
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};
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udevMatchRules = mkOption {
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type = nullOr (listOf str);
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default = null;
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example = [
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''ATTRS{idVendor}=="1abc"''
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];
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};
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};
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config = let
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scannerConfig.services.barcodebuddy-scanner = {
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inputDevice = mkIf (cfg.udevMatchRules != null) (
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mkDefault "/dev/barcodebuddy-scanner"
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);
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apiKeyPath = mkIf (cfg.serverAddress == null) (
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mkOptionDefault null
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);
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};
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localBbuddyConfig = {
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services.barcodebuddy-scanner = {
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serverAddress = mkOptionDefault null;
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user = mkOptionDefault "barcodebuddy";
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};
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systemd.services.barcodebuddy-scanner = let
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inherit (config.services) barcodebuddy;
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services =
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["phpfpm-barcodebuddy.service"]
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++ optional barcodebuddy.screen.enable "barcodebuddy-websocket.service";
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in
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mkIf cfg.enable {
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wantedBy = services;
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bindsTo = services;
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after = services;
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environment = mapAttrs' toEnvPair barcodebuddy.settings;
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};
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};
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# https://github.com/Forceu/barcodebuddy/blob/master/example/bbuddy-grabInput.conf
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conf.systemd.services.barcodebuddy-scanner = let
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RuntimeDirectory = "barcodebuddy-scanner";
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apiKeyFile = "apikey.env";
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prepKeyEnvironment = pkgs.writeShellScript "barcodebuddy-scanner-apikey.sh" ''
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set -eu
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printf "API_KEY=$(cat $API_KEY_PATH)\\n" > $RUNTIME_DIRECTORY/${apiKeyFile}
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'';
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in {
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wantedBy = [
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"multi-user.target"
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];
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environment = mkMerge [
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(mkIf (cfg.serverAddress != null) {
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SERVER_ADDRESS = cfg.serverAddress;
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})
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(mkIf (cfg.scanCommand != null) {
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BARCODE_COMMAND = cfg.scanCommand;
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})
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(mkIf (cfg.apiKeyPath != null) {
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API_KEY_PATH = cfg.apiKeyPath;
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})
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];
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unitConfig = {
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Description = "Grab barcode scans for barcode buddy";
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ConditionPathExists = mkIf (cfg.inputDevice != null) [
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cfg.inputDevice
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];
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};
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serviceConfig = {
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inherit RuntimeDirectory;
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Type = "exec";
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ExecStart = [
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(getExe cfg.package + optionalString (cfg.inputDevice != null) " ${cfg.inputDevice}")
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];
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ExecStartPre = mkIf (cfg.apiKeyPath != null) [
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"${prepKeyEnvironment}"
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];
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EnvironmentFile = mkIf (cfg.apiKeyPath != null) [
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"-/run/${RuntimeDirectory}/${apiKeyFile}"
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];
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Restart = "on-failure";
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User = cfg.user;
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};
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};
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conf.services.udev.extraRules = let
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rules =
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[
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''SUBSYSTEM=="input"''
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''ACTION=="add"''
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''KERNEL=="event*"''
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]
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++ cfg.udevMatchRules
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++ [
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''SYMLINK+="barcodebuddy-scanner"''
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''OWNER="${cfg.user}"''
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''MODE="0600"''
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''TAG+="systemd"''
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''ENV{SYSTEMD_WANTS}="barcodebuddy-scanner.service"''
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];
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rulesLine = concatStringsSep ", " rules;
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in
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mkIf (cfg.udevMatchRules != null) rulesLine;
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in
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mkMerge [
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scannerConfig
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(mkIf config.services.barcodebuddy.enable or false localBbuddyConfig)
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(mkIf cfg.enable conf)
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];
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}
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@ -11,6 +11,7 @@
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inherit (lib.attrsets) mapAttrs' nameValuePair;
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inherit (lib.lists) isList imap0;
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inherit (lib.strings) concatStringsSep;
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inherit (lib.meta) getExe;
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cfg = config.services.barcodebuddy;
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toEnvName = key: "BBUDDY_" + key;
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toEnvValue = value:
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@ -166,7 +167,7 @@ in {
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};
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conf.systemd.tmpfiles.rules = [
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"d ${cfg.dataDir} - barcodebuddy nginx - -"
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"d ${cfg.dataDir} - barcodebuddy ${config.services.nginx.group} - -"
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];
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conf.services.phpfpm.pools.barcodebuddy = {
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@ -219,19 +220,26 @@ in {
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extraConfig = cfg.nginxConfig;
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};
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};
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conf.systemd.services.bbuddy-websocket = mkIf cfg.screen.enable {
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wantedBy = ["multi-user.target"];
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environment = mapAttrs' toEnvPair cfg.settings;
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unitConfig = {
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Description = "Run websocket server for barcodebuddy screen feature";
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conf.systemd.services.barcodebuddy-websocket = let
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phpService = "phpfpm-barcodebuddy.service";
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in
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mkIf cfg.screen.enable {
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wantedBy = [phpService];
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bindsTo = [phpService];
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after = [phpService];
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environment = mapAttrs' toEnvPair cfg.settings;
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unitConfig = {
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Description = "Run websocket server for barcodebuddy screen feature";
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};
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serviceConfig = {
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Type = "exec";
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ExecStart = [
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"${getExe config.services.phpfpm.pools.barcodebuddy.phpPackage} ${cfg.package}/wsserver.php"
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];
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Restart = "on-failure";
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User = "barcodebuddy";
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};
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};
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serviceConfig = {
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ExecStart = "${config.services.phpfpm.pools.barcodebuddy.phpPackage}/bin/php ${cfg.package}/wsserver.php";
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Restart = "on-failure";
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StandardOutput = "null";
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User = "barcodebuddy";
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};
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};
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in
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mkMerge [bbuddyConfig (mkIf cfg.enable conf)];
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}
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27
modules/system/exports/barcodebuddy.nix
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27
modules/system/exports/barcodebuddy.nix
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@ -0,0 +1,27 @@
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{
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lib,
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gensokyo-zone,
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...
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}: let
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inherit (gensokyo-zone.lib) mapAlmostOptionDefaults mkAlmostOptionDefault;
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inherit (lib.modules) mkIf;
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in {
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config.exports.services.barcodebuddy = {config, ...}: {
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nixos = {
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serviceAttr = "barcodebuddy";
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assertions = mkIf config.enable [
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(nixosConfig: let
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cfg = nixosConfig.services.barcodebuddy;
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in {
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assertion = config.ports.screen.port == cfg.screen.websocketPort;
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message = "screen.websocketPort mismatch";
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})
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];
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};
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defaults.port.listen = mkAlmostOptionDefault "lan";
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ports.screen = mapAlmostOptionDefaults {
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port = 47631;
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transport = "tcp";
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};
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};
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}
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