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{ config, osConfig, lib, pkgs, ... }: | ||
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let | ||
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cfg = config.programs.nh; | ||
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in { | ||
meta.maintainers = with lib.maintainers; [ johnrtitor ]; | ||
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options.programs.nh = { | ||
enable = lib.mkEnableOption "nh, yet another Nix CLI helper"; | ||
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package = lib.mkPackageOption pkgs "nh" { }; | ||
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flake = lib.mkOption { | ||
type = lib.types.nullOr lib.types.path; | ||
default = null; | ||
description = '' | ||
The path that will be used for the {env}`FLAKE` environment variable. | ||
{env}`FLAKE` is used by nh as the default flake for performing actions, | ||
like {command}`nh os switch`. | ||
''; | ||
}; | ||
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clean = { | ||
enable = lib.mkEnableOption '' | ||
periodic garbage collection for user profile and nix store with nh clean | ||
user''; | ||
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dates = lib.mkOption { | ||
type = lib.types.singleLineStr; | ||
default = "weekly"; | ||
description = '' | ||
How often cleanup is performed. | ||
The format is described in {manpage}`systemd.time(7)`. | ||
''; | ||
}; | ||
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extraArgs = lib.mkOption { | ||
type = lib.types.singleLineStr; | ||
default = ""; | ||
example = "--keep 5 --keep-since 3d"; | ||
description = '' | ||
Options given to nh clean when the service is run automatically. | ||
See `nh clean all --help` for more information. | ||
''; | ||
}; | ||
}; | ||
}; | ||
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config = { | ||
warnings = lib.optionals (!(cfg.clean.enable -> !osConfig.nix.gc.automatic)) | ||
[ | ||
"programs.nh.clean.enable and nix.gc.automatic (system-wide in configuration.nix) are both enabled. Please use one or the other to avoid conflict." | ||
]; | ||
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assertions = [{ | ||
assertion = (cfg.flake != null) -> !(lib.hasSuffix ".nix" cfg.flake); | ||
message = "nh.flake must be a directory, not a nix file"; | ||
}]; | ||
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home = lib.mkIf cfg.enable { | ||
packages = [ cfg.package ]; | ||
sessionVariables = lib.mkIf (cfg.flake != null) { FLAKE = cfg.flake; }; | ||
}; | ||
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systemd.user = lib.mkIf cfg.clean.enable { | ||
services.nh-clean = { | ||
Unit.Description = "Nh clean (user)"; | ||
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Service = { | ||
Type = "oneshot"; | ||
ExecStart = | ||
"exec ${lib.getExe cfg.package} clean user ${cfg.clean.extraArgs}"; | ||
Environment = "PATH=$PATH:${config.nix.package}"; | ||
}; | ||
}; | ||
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timers.nh-clean = { | ||
Unit.Description = "Run nh clean"; | ||
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Timer = { | ||
OnCalendar = cfg.clean.dates; | ||
Persistent = true; | ||
}; | ||
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Install.WantedBy = [ "timers.target" ]; | ||
}; | ||
}; | ||
}; | ||
} |