Modular, context-aware and aspect-oriented dendritic Nix configurations.
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Improve comment on how to avoid duplication from default.includes. (#74)
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templates/default/modules/den.nix
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templates/default/modules/den.nix
···
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};
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};
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# This one can be included on igloo host to make USB/VM installers.
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# This one can be included on a host to make USB/VM installers.
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vm-bootable =
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{ host, ... }:
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{ ... }:
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{
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nixos =
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{ modulesPath, ... }:
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{
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networking.hostName = host.hostName;
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imports = [ (modulesPath + "/installer/cd-dvd/installation-cd-graphical-base.nix") ];
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};
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};
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};
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den.aspects.igloo.includes =
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let
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# an small parametric aspect that needs access to contextual host data.
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hostname =
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{ host, ... }:
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{
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nixos.networking.hostName = host.name;
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};
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in
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[
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hostname
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den.aspects.common._.vm-bootable
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den.aspects.common._.xfce-desktop
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];
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den.aspects.igloo.includes = [
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den.aspects.common._.vm-bootable
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den.aspects.common._.xfce-desktop
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];
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# NixOS configuration for igloo.
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den.aspects.igloo.nixos =
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# Disable booting when running on CI on all NixOS hosts.
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(if config ? _module.args.CI then den.aspects.ci-no-boot else { })
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# NOTE: be cautious when adding fully parametric functions to defaults.
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# defaults are included on EVERY host/user/home, and IF you are not careful
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# you could be duplicating config values. For example:
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#
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# # This will append 42 into foo option for the {host} and for EVERY {host,user}
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# ({ host, ... }: { nixos.foo = [ 42 ]; }) # DO-NOT-DO-THIS.
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#
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# # Instead try to be explicit if a function is intended for ONLY { host }.
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(den.lib.take.exactly (
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{ host }:
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{
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nixos.networking.hostName = host.hostName;
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}
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))
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];
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den.aspects.ci-no-boot = {