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43 lines
1.2 KiB
Nix
43 lines
1.2 KiB
Nix
2 months ago
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{ config, lib, ... }:
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let
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channelsEn = config.nix.channel.enable;
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nixFeature = lib.trivial.flip builtins.elem config.nix.settings.experimental-features;
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packageNames = map lib.strings.getName config.environment.systemPackages;
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2 months ago
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isInstalled = lib.trivial.flip builtins.elem packageNames;
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gitInst = isInstalled "git";
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2 months ago
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gitEn = config.programs.git.enable;
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in
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{
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config = {
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assertions = [
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{
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assertion = !channelsEn -> nixFeature "flakes";
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message = ''
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You disabled Nix channels, then you should enable flakes, otherwise you cannot build a new config.
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'';
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}
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{
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assertion = (!channelsEn && nixFeature "flakes") -> (gitInst || gitEn);
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message = ''
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Missing git, which is required to interact with most flakes.
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'';
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}
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{
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assertion = nixFeature "flakes" -> nixFeature "nix-command";
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message = ''
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Nix experimental-feature "flakes" requires feature "nix-command"
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'';
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}
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];
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warnings = [
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# TODO add link to this file
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(lib.mkIf (gitEn && !gitInst) ''
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(not relevant for you, please report to the module author) git package was not detected properly, fallback to programs.git module
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'')
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];
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};
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}
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