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home-manager/modules/programs/htop.nix

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{ config, lib, pkgs, ... }:
with lib;
let
inherit (pkgs.stdenv.hostPlatform) isDarwin;
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cfg = config.programs.htop;
formatOption = n: v:
let v' = if isBool v then (if v then "1" else "0") else toString v;
in "${n}=${v'}";
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formatMeters = side: meters: {
"${side}_meters" = concatMap (mapAttrsToList (x: _: x)) meters;
"${side}_meter_modes" = concatMap (mapAttrsToList (_: y: y)) meters;
};
leftMeters = formatMeters "left";
rightMeters = formatMeters "right";
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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;
PERCENT_NORM_CPU = 52;
ELAPSED = 53;
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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;
M_PSS = 118;
M_SWAP = 119;
M_PSSWP = 120;
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};
defaultFields = with fields; [
PID
USER
PRIORITY
NICE
M_SIZE
M_RESIDENT
M_SHARE
STATE
PERCENT_CPU
PERCENT_MEM
TIME
COMM
];
modes = {
Bar = 1;
Text = 2;
Graph = 3;
LED = 4;
};
# Utilities for constructing meters
meter = mode: name: { ${name} = mode; };
bar = meter modes.Bar;
text = meter modes.Text;
graph = meter modes.Graph;
led = meter modes.LED;
blank = text "Blank";
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in {
meta.maintainers = [ hm.maintainers.bjpbakker ];
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options.programs.htop = {
enable = mkEnableOption "htop";
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settings = mkOption {
type = with types;
attrsOf (oneOf [ bool int str (listOf (oneOf [ int str ])) ]);
default = { };
example = literalExpression ''
{
color_scheme = 6;
cpu_count_from_one = 0;
delay = 15;
fields = with config.lib.htop.fields; [
PID
USER
PRIORITY
NICE
M_SIZE
M_RESIDENT
M_SHARE
STATE
PERCENT_CPU
PERCENT_MEM
TIME
COMM
];
highlight_base_name = 1;
highlight_megabytes = 1;
highlight_threads = 1;
} // (with config.lib.htop; leftMeters [
(bar "AllCPUs2")
(bar "Memory")
(bar "Swap")
(text "Zram")
]) // (with config.lib.htop; rightMeters [
(text "Tasks")
(text "LoadAverage")
(text "Uptime")
(text "Systemd")
]);
'';
description = ''
Configuration options to add to
{file}`$XDG_CONFIG_HOME/htop/htoprc`.
'';
};
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package = mkOption {
type = types.package;
default = pkgs.htop;
defaultText = literalExpression "pkgs.htop";
description = "Package containing the {command}`htop` program.";
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};
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};
config = mkIf cfg.enable {
lib.htop = {
inherit fields modes leftMeters rightMeters bar text graph led blank;
};
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home.packages = [ cfg.package ];
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xdg.configFile."htop/htoprc" = let
defaults = {
fields = if isDarwin then
remove fields.M_SHARE defaultFields
else
defaultFields;
};
before = optionalAttrs (cfg.settings ? header_layout) {
inherit (cfg.settings) header_layout;
};
settings = defaults // (removeAttrs cfg.settings (attrNames before));
formatOptions = mapAttrsToList formatOption;
in mkIf (cfg.settings != { }) {
text =
concatStringsSep "\n" (formatOptions before ++ formatOptions settings)
+ "\n";
};
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};
}