24 lines
617 B
Nix
24 lines
617 B
Nix
{ lib, config, ... }:
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let
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cfg = config.playground.greeter;
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in
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{
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# One option namespace keeps the example focused.
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options.playground.greeter = {
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enable = lib.mkEnableOption "the playground greeter";
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name = lib.mkOption {
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type = lib.types.str;
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default = "world";
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description = "Name placed in the generated /etc/greeting file.";
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};
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};
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# `mkIf` discards the whole config block when enable is false, so a
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# system that imports the module but leaves it disabled pays nothing.
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config = lib.mkIf cfg.enable {
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environment.etc."greeting".text = "hello, ${cfg.name}";
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};
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}
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