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{ lib, pkgs, stdenvNoCC }:
let
tests =
let
p = pkgs.python3Packages.xpybutil.overridePythonAttrs (_: { dontWrapPythonPrograms = true; });
in
[
({
name = "overridePythonAttrs";
expr = !lib.hasInfix "wrapPythonPrograms" p.postFixup;
expected = true;
})
({
name = "repeatedOverrides-pname";
expr = repeatedOverrides.pname == "a-better-hello-with-blackjack";
expected = true;
})
({
name = "repeatedOverrides-entangled-pname";
expr = repeatedOverrides.entangled.pname == "a-better-figlet-with-blackjack";
expected = true;
})
];
addEntangled = origOverrideAttrs: f:
origOverrideAttrs (
lib.composeExtensions f (self: super: {
passthru = super.passthru // {
entangled = super.passthru.entangled.overrideAttrs f;
overrideAttrs = addEntangled self.overrideAttrs;
};
})
);
entangle = pkg1: pkg2: pkg1.overrideAttrs (self: super: {
passthru = super.passthru // {
entangled = pkg2;
overrideAttrs = addEntangled self.overrideAttrs;
};
});
example = entangle pkgs.hello pkgs.figlet;
overrides1 = example.overrideAttrs (_: super: { pname = "a-better-${super.pname}"; });
repeatedOverrides = overrides1.overrideAttrs (_: super: { pname = "${super.pname}-with-blackjack"; });
in
stdenvNoCC.mkDerivation {
name = "test-overriding";
passthru = { inherit tests; };
buildCommand = ''
touch $out
'' + lib.concatMapStringsSep "\n" (t: "([[ ${lib.boolToString t.expr} == ${lib.boolToString t.expected} ]] && echo '${t.name} success') || (echo '${t.name} fail' && exit 1)") tests;
}
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