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turboprop/flake.nix
Antonio Gurgel aa1ec7d842 Don't do readFile twice
Also, I had a brief temptation to move `gatherApis` to `flake-builders`,
but apart from being used in the flake's let-in, it has little in common
with the other builders. I need to lose a direct dependency on kubelib
to try the concept out, though (`flake-builders` doesn't take `kubelib`),
and I ended up keeping the result.
2023-11-20 23:02:54 -08:00

111 lines
3.4 KiB
Nix

{
description = "Kubernetes deployments flake";
inputs = {
# Base
nixpkgs.url = "github:NixOS/nixpkgs";
flake-utils.url = "github:numtide/flake-utils";
nix-kube-generators.url = "github:farcaller/nix-kube-generators";
nixhelm.url = "github:farcaller/nixhelm";
# Dev
devshell = {
url = "github:numtide/devshell";
inputs.nixpkgs.follows = "nixpkgs";
};
# TODO: My whole homelab is a flake. It would be
# pretty wild to be able to import data from it.
};
outputs = inputs @ {
self,
nixpkgs,
flake-utils,
nix-kube-generators,
nixhelm,
devshell,
}: let
rake = import ./lib/rake.nix;
in
{
# Releases expected to provide custom APIs
# (e.g.: Gateway API, Istio, Longhorn)
# go in `./system`. All others in `./releases`.
systemReleaseData = rake.leaves ./system;
releaseData = rake.leaves ./releases;
repos = rake.leaves ./charts;
namespaces = rake.namespaces {
roots = [./system ./releases];
extraMetadata = import ./namespaces.nix;
};
}
// flake-utils.lib.eachDefaultSystem (system: let
pkgs = import nixpkgs {
inherit system;
overlays = [devshell.overlays.default];
};
kubelib = nix-kube-generators.lib {inherit pkgs;};
# When I move lib/eureka to a separate flake
# this'll look something like:
# lib = import ./lib {...} // {eureka=import ./eureka {...};}
lib = import ./lib {inherit charts kubelib pkgs;};
buildDerivations = import ./lib/flake-builders.nix {inherit pkgs lib;};
collectDerivations = with pkgs.lib; attrsets.collect isDerivation;
charts = buildDerivations.charts self.repos;
systemReleases = buildDerivations.releases self.systemReleaseData;
customApis =
pkgs.lib.lists.flatten
(map
(chartDrv: lib.gatherApis chartDrv.outPath)
(collectDerivations systemReleases));
releases = buildDerivations.releases self.releaseData;
extras = buildDerivations.extras self.releaseData;
namespaces = buildDerivations.namespaces self.namespaces;
in {
packages = {
inherit charts;
# Useful for debugging; will go to own flake eventually.
inherit releases extras namespaces lib;
inherit (self) releaseData;
inherit customApis;
# Each of the leaves of the `releases` and `extras` attrsets
# is a derivation (explained better in `lib/flake-builders.nix`).
# Here, they are gathered into one mega-derivation, with
# Kustomizations at each level for usage with `kubectl apply -k $path`.
default = let
pname = "kubeflake"; # TODO: find better name
in
pkgs.stdenv.mkDerivation {
inherit pname;
version = "0.0.1";
release_drvs = collectDerivations releases;
extra_drvs = collectDerivations extras;
namespace_drv = namespaces;
src = builtins.path {
path = ./.;
name = pname;
};
buildInputs = with pkgs; [kustomize];
phases = ["installPhase"];
installPhase = builtins.readFile ./lib/output.sh;
};
};
devShell = pkgs.devshell.mkShell {
imports = [(pkgs.devshell.importTOML ./devshell.toml)];
};
formatter = pkgs.alejandra;
});
}