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tests.top-level: add test for appendOverlays preserving splicing

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Ensures that appendOverlays with an empty list returns spliced
packages, so that cross-compilation in NixOS modules works correctly.
This commit is contained in:
DavHau
2026-03-19 21:48:10 +08:00
parent 99ab2550e7
commit 514529545b
1 changed files with 18 additions and 0 deletions
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18
pkgs/test/top-level/default.nix
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@@ -64,4 +64,22 @@ lib.recurseIntoAttrs {
assert lib.all (p: p.stdenv.buildPlatform == p.stdenv.hostPlatform) pkgsLocal;
assert lib.all (p: p.stdenv.buildPlatform != p.stdenv.hostPlatform) pkgsCross;
pkgs.emptyFile;
# appendOverlays must preserve splicing so that cross-compilation
# works in NixOS modules (which go through appendOverlays via nixpkgs.nix).
appendOverlaysPreservesSplicing =
let
cross = nixpkgsFun {
localSystem = {
system = "x86_64-linux";
};
crossSystem = {
system = "aarch64-linux";
};
};
appended = cross.appendOverlays [ ];
in
assert cross.makeWrapper ? __spliced;
assert appended.makeWrapper ? __spliced;
pkgs.emptyFile;
}