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31 lines
1.1 KiB
Markdown
31 lines
1.1 KiB
Markdown
# Writing profiles
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When setting an option, use `lib.mkDefault` unless:
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- The option *must* be set and the user should get an error if they try to override it.
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- The setting should merge with the user's settings (typical for list or set options).
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For example:
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```nix
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{ lib }: {
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# Using mkDefault, because the user might want to disable tlp
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services.tlp.enable = lib.mkDefault true;
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# No need to use mkDefault, because the setting will merge with the user's setting
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boot.kernelModules = [ "tmp_smapi" ];
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}
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```
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Try to avoid "opinionated" settings relating to optional features like sound, bluetooth, choice of bootloader etc.
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Where possible, use module imports to share code between similar hardware variants.
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# Performance
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Profiles should favor usability and stability, so performance improvements should either be conservative or
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be guarded behind additional NixOS module options.
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If it makes sense to have a performance-focussed config, it can be declared in a separate profile.
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# Testing
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Because profiles can only be tested with the appropriate hardware, quality assurance is up to *you*.
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