infrastructure/hive.nix

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Nix
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let
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sources' = import ./npins;
# Patch sources directly
nix-lib = import ./lib/nix-lib;
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patch = import ./lib/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
imports = [ ./machines/${node}/_configuration.nix ];
};
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nixpkgs' = import ./meta/nixpkgs.nix;
# All supported nixpkgs versions, instanciated
nixpkgs = nix-lib.mapSingleFuse mkNixpkgs nixpkgs'.supported;
# Get the configured nixos version for the node,
# defaulting to the one defined in meta/nixpkgs
version = node: nodes'.${node}.nixpkgs or nixpkgs'.default;
# Builds a patched version of nixpkgs, only as the source
mkNixpkgs' =
v:
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patch.mkNixpkgsSrc rec {
src = sources'.${name};
name = "nixos-${v}";
};
# 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 {
lib = nixpkgs.${version node}.lib // {
extra = nix-lib;
};
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dgn-keys = import ./keys { inherit meta; };
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meta = (import ./meta) lib;
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nodeMeta = meta.nodes.${node};
sources = builtins.mapAttrs (patch.base { pkgs = nixpkgs.${version node}; }).applyPatches' sources';
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};
in
{
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meta = {
nodeNixpkgs = nix-lib.mapSingleFuse (n: nixpkgs.${version n}) nodes;
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specialArgs = {
inherit nixpkgs;
};
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nodeSpecialArgs = nix-lib.mapSingleFuse mkArgs nodes;
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};
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defaults =
{
name,
nodeMeta,
sources,
...
}:
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{
# Import the default modules
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imports = [
./modules
(import "${sources.lix-module}/module.nix" { inherit (sources) lix; })
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];
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# Include default secrets
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age-secrets.sources = [ ./machines/${name}/secrets ];
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# Deployment config is specified in meta.nodes.${node}.deployment
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inherit (nodeMeta) deployment;
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nix = {
# Set NIX_PATH to the patched version of nixpkgs
nixPath = [ "nixpkgs=${mkNixpkgs' (version name)}" ];
optimise.automatic = true;
gc = {
automatic = true;
dates = "weekly";
options = "--delete-older-than 7d";
};
};
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# Allow unfree packages
nixpkgs.config.allowUnfree = true;
# Use the stateVersion declared in the metadata
system = {
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inherit (nodeMeta) stateVersion;
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};
};
}
// (nix-lib.mapSingleFuse mkNode nodes)