nix/eval-config.nix


1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30

# SPDX-License-Identifier: MIT
# SPDX-FileCopyrightText: 2022 Unikie
# SPDX-FileCopyrightText: 2023 Alyssa Ross <hi@alyssa.is>

# The empty list of attribute set arguments is required, because
# otherwise Nix will not pass arguments supplied on the command line
# with --arg/--argstr.
callback: { ... } @ args:

let
  customConfigPath = builtins.tryEval <spectrumConfig>;
in

callback (args // rec {
  config = ({ pkgs ? import <nixpkgs> {} }: {
    inherit pkgs;
  }) args.config or (if customConfigPath.success then import customConfigPath.value
                     else if builtins.pathExists ../config.nix then import ../config.nix
                     else {});

  src = with config.pkgs.lib; cleanSourceWith {
    filter = path: type:
      path != toString ../Documentation/_site &&
      path != toString ../Documentation/.jekyll-cache &&
      path != toString ../Documentation/diagrams/stack.svg &&
      (type == "file" -> !hasSuffix ".nix" path) &&
      (type == "directory" -> builtins.baseNameOf path != "build");
    src = cleanSource ../.;
  };
})