infrastructure/hive.nix

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Nix
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let
sources = import ./npins;
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lib = import (sources.nix-lib + "/src/trivial.nix");
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patch = import sources.nix-patches { patchFile = ./patches; };
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nodes' = import ./meta/nodes.nix;
nodes = builtins.attrNames nodes';
mkNode = node: {
# Import the base configuration for each node
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imports = builtins.map (lib.mkRel (./machines/${node})) [
"_configuration.nix"
"_hardware-configuration.nix"
];
};
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nixpkgs' = import ./meta/nixpkgs.nix;
# All supported nixpkgs versions, instanciated
nixpkgs = lib.mapSingleFuse mkNixpkgs nixpkgs'.supported;
# Get the configured nixos version for the node,
# defaulting to the one defined in meta/nixpkgs
version = node: nodes'.${node}.nixpkgs or nixpkgs'.default;
# Builds a patched version of nixpkgs, only as the source
mkNixpkgs' =
v:
let
version = "nixos-${v}";
in
patch.mkNixpkgsSrc {
src = sources.${version};
inherit version;
};
# Instanciates the required nixpkgs version
mkNixpkgs = version: import (mkNixpkgs' version) { };
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###
# Function to create arguments based on the node
#
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mkArgs = node: rec {
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lib = import sources.nix-lib {
inherit (nixpkgs.${version node}) lib;
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keysRoot = ./keys;
};
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meta = (import ./meta) lib;
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};
in
{
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meta = {
nodeNixpkgs = lib.mapSingleFuse (n: nixpkgs.${version n}) nodes;
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specialArgs = {
inherit nixpkgs sources;
};
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nodeSpecialArgs = lib.mapSingleFuse mkArgs nodes;
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};
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defaults =
{ meta, name, ... }:
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{
# Import the default modules
imports = [ ./modules ];
# Include default secrets
age-secrets.sources = [ (./machines + "/${name}/secrets") ];
# Deployment config is specified in meta.nodes.${node}.deployment
inherit (meta.nodes.${name}) deployment;
# Set NIX_PATH to the patched version of nixpkgs
nix.nixPath = [ "nixpkgs=${mkNixpkgs' (version name)}" ];
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nix.optimise.automatic = true;
# Allow unfree packages
nixpkgs.config.allowUnfree = true;
# Use the stateVersion declared in the metadata
system = {
inherit (meta.nodes.${name}) stateVersion;
};
};
}
// (lib.mapSingleFuse mkNode nodes)