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home-manager/modules/lib/assertions.nix
Robert Helgesson 5f433eb164
Move platform check into modules
Before, loading a module would be guarded by an optional platform
condition. This made it possible to avoid loading and evaluating a
module if it did not support the host platform.

Unfortunately, this made it impossible to share a single configuration
between GNU/Linux and Darwin hosts, which some wish to do.

This removes the conditional load and instead inserts host platform
assertions in the modules that are platform specific.

Fixes #1906
2021-07-18 20:43:22 +02:00

14 lines
376 B
Nix

{ lib }:
{
assertPlatform = module: pkgs: platforms: {
assertion = lib.elem pkgs.stdenv.hostPlatform.system platforms;
message = let
platformsStr = lib.concatStringsSep "\n"
(map (p: " - ${p}") (lib.sort (a: b: a < b) platforms));
in ''
The module ${module} does not support your platform. It only supports
${platformsStr}'';
};
}