htop: add module

modules/default.nix

@@ -21,6 +21,7 @@ let
     ./programs/git.nix
     ./programs/gnome-terminal.nix
     ./programs/home-manager.nix
+    ./programs/htop.nix
     ./programs/info.nix
     ./programs/lesspipe.nix
     ./programs/ssh.nix

modules/programs/htop.nix

@@ -0,0 +1,331 @@
+{ config, lib, pkgs, ... }:
+
+with lib;
+
+let
+  cfg = config.programs.htop;
+
+  list = xs: concatMapStrings (x: "${toString x} ") xs;
+
+  bool = b: if b then "1" else "0";
+
+  fields = {
+    PID = 0;
+    COMM = 1;
+    STATE = 2;
+    PPID = 3;
+    PGRP = 4;
+    SESSION = 5;
+    TTY_NR = 6;
+    TPGID = 7;
+    MINFLT = 9;
+    MAJFLT = 11;
+    PRIORITY = 17;
+    NICE = 18;
+    STARTTIME = 20;
+    PROCESSOR = 37;
+    M_SIZE = 38;
+    M_RESIDENT = 39;
+    ST_UID = 45;
+    PERCENT_CPU = 46;
+    PERCENT_MEM = 47;
+    USER = 48;
+    TIME = 49;
+    NLWP = 50;
+    TGID = 51;
+    CMINFLT = 10;
+    CMAJFLT = 12;
+    UTIME = 13;
+    STIME = 14;
+    CUTIME = 15;
+    CSTIME = 16;
+    M_SHARE = 40;
+    M_TRS = 41;
+    M_DRS = 42;
+    M_LRS = 43;
+    M_DT = 44;
+    CTID = 99;
+    VPID = 100;
+    VXID = 102;
+    RCHAR = 102;
+    WCHAR = 103;
+    SYSCR = 104;
+    SYSCW = 105;
+    RBYTES = 106;
+    WBYTES = 107;
+    CNCLWB = 108;
+    IO_READ_RATE = 109;
+    IO_WRITE_RATE = 110;
+    IO_RATE = 111;
+    CGROUP = 112;
+    OOM = 113;
+    IO_PRIORITY = 114;
+  };
+
+  # Mapping from names to defaults
+  meters = {
+    Clock = 2;
+    LoadAverage = 2;
+    Load = 2;
+    Memory = 1;
+    Swap = 1;
+    Tasks = 2;
+    Uptime = 2;
+    Battery = 2;
+    Hostname = 2;
+    AllCPUs = 1;
+    AllCPUs2 = 1;
+    LeftCPUs = 1;
+    RightCPUs = 1;
+    LeftCPUs2 = 1;
+    RightCPUs2 = 1;
+    Blank = 2;
+    CPU = 1;
+    "CPU(1)"= 1;
+    "CPU(2)" = 1;
+    "CPU(3)" = 1;
+    "CPU(4)" = 1;
+  };
+
+  singleMeterType = types.either (types.enum (attrNames meters)) (types.submodule {
+    options = {
+      kind = mkOption {
+        type = types.enum (attrNames meters);
+        example = "AllCPUs";
+        description = "What kind of meter.";
+      };
+
+      mode = mkOption {
+        type = types.enum [ 1 2 3 4 ];
+        example = 2;
+        description = "Which mode the meter should use, one of 1(Bar) 2(Text) 3(Graph) 4(LED).";
+      };
+    };
+  });
+
+  # Converts the meter to an attribute set if it isn't already
+  meterStandard = m: if builtins.isString m then {
+    kind = m;
+    mode = meters.${m};
+  } else m;
+
+
+  meterType = types.submodule {
+    options = {
+      left = mkOption {
+        description = "Meters shown in the left header.";
+        default = [ "AllCPUs" "Memory" "Swap" ];
+        example = [
+          "Memory"
+          "LeftCPUs2"
+          "RightCPUs2"
+          { kind = "CPU"; mode = 3; }
+        ];
+        type = types.listOf singleMeterType;
+      };
+      right = mkOption {
+        description = "Meters shown in the right header.";
+        default = [ "Tasks" "LoadAverage" "Uptime" ];
+        example = [
+          { kind = "Clock"; mode = 4; }
+          "Uptime"
+          "Tasks"
+        ];
+        type = types.listOf singleMeterType;
+      };
+    };
+  };
+in
+{
+  options.programs.htop = {
+    enable = mkEnableOption "htop";
+
+    fields = mkOption {
+      type = types.listOf (types.enum (attrNames fields));
+      default = [ "PID" "USER" "PRIORITY" "NICE" "M_SIZE" "M_RESIDENT" "M_SHARE" "STATE" "PERCENT_CPU" "PERCENT_MEM" "TIME" "COMM" ];
+      example = [ "PID" "USER" "PRIORITY" "PERCENT_CPU" "M_RESIDENT" "PERCENT_MEM" "TIME" "COMM" ];
+      description = "Active fields shown in the table.";
+    };
+
+    sortKey = mkOption {
+      type = types.enum (attrNames fields);
+      default = "PERCENT_CPU";
+      example = "TIME";
+      description = "Which field to use for sorting.";
+    };
+
+    sortDescending = mkOption {
+      type = types.bool;
+      default = true;
+      description = "Whether to sort descending or not.";
+    };
+
+    hideThreads = mkOption {
+      type = types.bool;
+      default = false;
+      description = "Hide threads.";
+    };
+
+    hideKernelThreads = mkOption {
+      type = types.bool;
+      default = true;
+      description = "Hide kernel threads.";
+    };
+
+    hideUserlandThreads = mkOption {
+      type = types.bool;
+      default = false;
+      description = "Hide userland process threads.";
+    };
+
+    shadowOtherUsers = mkOption {
+      type = types.bool;
+      default = false;
+      description = "Shadow other users' processes.";
+    };
+
+    showThreadNames = mkOption {
+      type = types.bool;
+      default = false;
+      description = "Show custom thread names.";
+    };
+
+    showProgramPath = mkOption {
+      type = types.bool;
+      default = true;
+      description = "Show program path.";
+    };
+
+    highlightBaseName = mkOption {
+      type = types.bool;
+      default = false;
+      description = "Highlight program <quote>basename</quote>.";
+    };
+
+    highlightMegabytes = mkOption {
+      type = types.bool;
+      default = true;
+      description = "Highlight large numbers in memory counters.";
+    };
+
+    highlightThreads = mkOption {
+      type = types.bool;
+      default = true;
+      description = "Display threads in a different color.";
+    };
+    
+    treeView = mkOption {
+      type = types.bool;
+      default = false;
+      description = "Tree view.";
+    };
+
+    headerMargin = mkOption {
+      type = types.bool;
+      default = true;
+      description = "Leave a margin around header.";
+    };
+
+    detailedCpuTime = mkOption {
+      type = types.bool;
+      default = false;
+      description = "Detailed CPU time (System/IO-Wait/Hard-IRQ/Soft-IRQ/Steal/Guest).";
+    };
+
+    cpuCountFromZero = mkOption {
+      type = types.bool;
+      default = false;
+      description = "Count CPUs from 0 instead of 1.";
+    };
+
+    updateProcessNames = mkOption {
+      type = types.bool;
+      default = false;
+      description = "Update process names on every refresh.";
+    };
+
+    accountGuestInCpuMeter = mkOption {
+      type = types.bool;
+      default = false;
+      description = "Add guest time in CPU meter percentage.";
+    };
+
+    colorScheme = mkOption {
+      type = types.enum [ 0 1 2 3 4 5 6 ];
+      default = 0;
+      example = 6;
+      description = "Which color scheme to use.";
+    };
+
+    delay = mkOption {
+      type = types.int;
+      default = 15;
+      example = 2;
+      description = "Set the delay between updates, in tenths of seconds.";
+    };
+
+    meters = mkOption {
+      description = "Meters shown in the header.";
+      default = {
+        left = [ "AllCPUs" "Memory" "Swap" ];
+        right = [ "Tasks" "LoadAverage" "Uptime" ];
+      };
+      example = {
+        left = [
+          "Memory"
+          "CPU"
+          "LeftCPUs2"
+          "RightCPUs2"
+          { kind = "CPU"; mode = 3; }
+        ];
+        right = [
+          { kind = "Clock"; mode = 4; }
+          "Uptime"
+          "Tasks"
+          "LoadAverage"
+          { kind = "Battery"; mode = 1; }
+        ];
+      };
+      type = meterType;
+    };
+
+  };
+
+  config = mkIf cfg.enable {
+    home.packages = [ pkgs.htop ];
+
+    home.file.".config/htop/htoprc".text = let
+      leftMeters = map (m: (meterStandard m).kind) cfg.meters.left;
+      leftModes = map (m: (meterStandard m).mode) cfg.meters.left;
+      rightMeters = map (m: (meterStandard m).kind) cfg.meters.right;
+      rightModes = map (m: (meterStandard m).mode) cfg.meters.right;
+    in ''
+      # This file is regenerated by home-manager
+      # when options are changed in the config
+      fields=${list (map (n: fields.${n}) cfg.fields)}
+      sort_key=${toString (fields.${cfg.sortKey})}
+      sort_direction=${bool cfg.sortDescending}
+      hide_threads=${bool cfg.hideThreads}
+      hide_kernel_threads=${bool cfg.hideKernelThreads}
+      hide_userland_threads=${bool cfg.hideUserlandThreads}
+      shadow_other_users=${bool cfg.shadowOtherUsers}
+      show_thread_names=${bool cfg.showThreadNames}
+      show_program_path=${bool cfg.showProgramPath}
+      highlight_base_name=${bool cfg.highlightBaseName}
+      highlight_megabytes=${bool cfg.highlightMegabytes}
+      highlight_threads=${bool cfg.highlightThreads}
+      tree_view=${bool cfg.treeView}
+      header_margin=${bool cfg.headerMargin}
+      detailed_cpu_time=${bool cfg.detailedCpuTime}
+      cpu_count_from_zero=${bool cfg.cpuCountFromZero}
+      update_process_names=${bool cfg.updateProcessNames}
+      account_guest_in_cpu_meter=${bool cfg.accountGuestInCpuMeter}
+      color_scheme=${toString cfg.colorScheme}
+      delay=${toString cfg.delay}
+      left_meters=${list leftMeters}
+      left_meter_modes=${list leftModes}
+      right_meters=${list rightMeters}
+      right_meter_modes=${list rightModes}
+    '';
+  };
+}