nixpkgs/nixos/modules/programs/atop.nix

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# Global configuration for atop.
{ config, lib, ... }:
with lib;
let cfg = config.programs.atop;
in
{
###### interface
options = {
programs.atop = {
settings = mkOption {
type = types.attrs;
default = {};
example = {
flags = "a1f";
interval = 5;
};
description = ''
Parameters to be written to <filename>/etc/atoprc</filename>.
'';
};
};
};
config = mkIf (cfg.settings != {}) {
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environment.etc.atoprc.text =
concatStrings (mapAttrsToList (n: v: "${n} ${toString v}\n") cfg.settings);
};
}