<commit_before>{ config, lib, pkgs, ... }:

with lib;

let
  cfg = config.services.logstash;
  pluginPath = lib.concatStringsSep ":" cfg.plugins;
  havePluginPath = lib.length cfg.plugins > 0;
  ops = lib.optionalString;
  verbosityFlag = {
    debug = "--debug";
    info  = "--verbose";
    warn  = ""; # intentionally empty
    error = "--quiet";
    fatal = "--silent";
  }."${cfg.logLevel}";

in

{
  ###### interface

  options = {

    services.logstash = {

      enable = mkOption {
        type = types.bool;
        default = false;
        description = "Enable logstash.";
      };

      package = mkOption {
        type = types.package;
        default = pkgs.logstash;
        defaultText = "pkgs.logstash";
        example = literalExample "pkgs.logstash";
        description = "Logstash package to use.";
      };

      plugins = mkOption {
        type = types.listOf types.path;
        default = [ ];
        example = literalExample "[ pkgs.logstash-contrib ]";
        description = "The paths to find other logstash plugins in.";
      };

      logLevel = mkOption {
        type = types.enum [ "debug" "info" "warn" "error" "fatal" ];
        default = "warn";
        description = "Logging verbosity level.";
      };

      watchdogTimeout = mkOption {
        type = types.int;
        default = 10;
        description = "Set watchdog timeout value in seconds.";
      };

      filterWorkers = mkOption {
        type = types.int;
        default = 1;
        description = "The quantity of filter workers to run.";
      };

      enableWeb = mkOption {
        type = types.bool;
        default = false;
        description = "Enable the logstash web interface.";
      };

      address = mkOption {
        type = types.str;
        default = "0.0.0.0";
        description = "Address on which to start webserver.";
      };

      port = mkOption {
        type = types.str;
        default = "9292";
        description = "Port on which to start webserver.";
      };

      inputConfig = mkOption {
        type = types.lines;
        default = ''stdin { type => "example" }'';
        description = "Logstash input configuration.";
        example = ''
          # Read from journal
          pipe {
            command => "''${pkgs.systemd}/bin/journalctl -f -o json"
            type => "syslog" codec => json {}
          }
        '';
      };

      filterConfig = mkOption {
        type = types.lines;
        default = ''noop {}'';
        description = "logstash filter configuration.";
        example = ''
          if [type] == "syslog" {
            # Keep only relevant systemd fields
            # http://www.freedesktop.org/software/systemd/man/systemd.journal-fields.html
            prune {
              whitelist_names => [
                "type", "@timestamp", "@version",
                "MESSAGE", "PRIORITY", "SYSLOG_FACILITY",
              ]
            }
          }
        '';
      };

      outputConfig = mkOption {
        type = types.lines;
        default = ''stdout { debug => true debug_format => "json"}'';
        description = "Logstash output configuration.";
        example = ''
          redis { host => "localhost" data_type => "list" key => "logstash" codec => json }
          elasticsearch { embedded => true }
        '';
      };

    };
  };


  ###### implementation

  config = mkIf cfg.enable {
    systemd.services.logstash = with pkgs; {<commit_msg>logstash: fix examples in service file<commit_after>{ config, lib, pkgs, ... }:

with lib;

let
  cfg = config.services.logstash;
  pluginPath = lib.concatStringsSep ":" cfg.plugins;
  havePluginPath = lib.length cfg.plugins > 0;
  ops = lib.optionalString;
  verbosityFlag = {
    debug = "--debug";
    info  = "--verbose";
    warn  = ""; # intentionally empty
    error = "--quiet";
    fatal = "--silent";
  }."${cfg.logLevel}";

in

{
  ###### interface

  options = {

    services.logstash = {

      enable = mkOption {
        type = types.bool;
        default = false;
        description = "Enable logstash.";
      };

      package = mkOption {
        type = types.package;
        default = pkgs.logstash;
        defaultText = "pkgs.logstash";
        example = literalExample "pkgs.logstash";
        description = "Logstash package to use.";
      };

      plugins = mkOption {
        type = types.listOf types.path;
        default = [ ];
        example = literalExample "[ pkgs.logstash-contrib ]";
        description = "The paths to find other logstash plugins in.";
      };

      logLevel = mkOption {
        type = types.enum [ "debug" "info" "warn" "error" "fatal" ];
        default = "warn";
        description = "Logging verbosity level.";
      };

      watchdogTimeout = mkOption {
        type = types.int;
        default = 10;
        description = "Set watchdog timeout value in seconds.";
      };

      filterWorkers = mkOption {
        type = types.int;
        default = 1;
        description = "The quantity of filter workers to run.";
      };

      enableWeb = mkOption {
        type = types.bool;
        default = false;
        description = "Enable the logstash web interface.";
      };

      address = mkOption {
        type = types.str;
        default = "0.0.0.0";
        description = "Address on which to start webserver.";
      };

      port = mkOption {
        type = types.str;
        default = "9292";
        description = "Port on which to start webserver.";
      };

      inputConfig = mkOption {
        type = types.lines;
        default = ''stdin { type => "example" }'';
        description = "Logstash input configuration.";
        example = ''
          # Read from journal
          pipe {
            command => "''${pkgs.systemd}/bin/journalctl -f -o json"
            type => "syslog" codec => json {}
          }
        '';
      };

      filterConfig = mkOption {
        type = types.lines;
        default = ''noop {}'';
        description = "logstash filter configuration.";
        example = ''
          if [type] == "syslog" {
            # Keep only relevant systemd fields
            # http://www.freedesktop.org/software/systemd/man/systemd.journal-fields.html
            prune {
              whitelist_names => [
                "type", "@timestamp", "@version",
                "MESSAGE", "PRIORITY", "SYSLOG_FACILITY"
              ]
            }
          }
        '';
      };

      outputConfig = mkOption {
        type = types.lines;
        default = ''stdout { debug => true debug_format => "json"}'';
        description = "Logstash output configuration.";
        example = ''
          redis { host => "localhost" data_type => "list" key => "logstash" codec => json }
          elasticsearch { embedded => true }
        '';
      };

    };
  };


  ###### implementation

  config = mkIf cfg.enable {
    systemd.services.logstash = with pkgs; {
{'fraction_non_alphanumeric': 0.13056036972848065, 'fraction_numerical': 0.0034662045060658577, 'mean_word_length': 1.7523847376788553, 'pattern_counts': {'":': 2, '<': 3, '<?xml version=': 0, '>': 29, 'https://': 0, 'lorem ipsum': 0, 'www.': 2, 'xml': 0}, 'pii_count': 2, 'substrings_counts': 0, 'word_list_counts': {'cursed_substrings.json': 0, 'profanity_word_list.json': 0, 'sexual_word_list.json': 0, 'zh_pornsignals.json': 0}}
{'dir': 'git-commits-cleaned', 'id': '6530009', 'n_tokens_mistral': 1993, 'n_tokens_neox': 1922, 'n_words': 497}