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{ config, lib, pkgs, ... }: |
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with lib; |
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let |
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cfg = config.nix.optimise; |
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in |
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{ |
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###### interface |
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options = { |
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nix.optimise = { |
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automatic = mkOption { |
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default = false; |
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type = types.bool; |
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description = "Automatically run the nix store optimiser at a specific time."; |
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}; |
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dates = mkOption { |
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default = "03:45"; |
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type = types.listOf types.str; |
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description = '' |
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Specification (in the format described by |
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<citerefentry><refentrytitle>systemd.time</refentrytitle> |
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<manvolnum>5</manvolnum></citerefentry>) of the time at |
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which the optimiser will run. |
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''; |
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}; |
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}; |
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}; |
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###### implementation |
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config = { |
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systemd.services.nix-optimise = |
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{ description = "Nix Store Optimiser"; |
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serviceConfig.ExecStart = "${config.nix.package}/bin/nix-store --optimise"; |
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startAt = optional cfg.automatic cfg.dates; |
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}; |
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}; |
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} |
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