core/pkgs/build-support/trivial-builders/test/writeClosure-union.nix

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{
lib,
runCommandLocal,
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# Test targets
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writeClosure,
samples,
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}:
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runCommandLocal "test-trivial-builders-writeClosure-union"
{
__structuredAttrs = true;
closures = lib.mapAttrs (n: v: writeClosure [ v ]) samples;
collectiveClosure = writeClosure (lib.attrValues samples);
inherit samples;
meta.maintainers = with lib.maintainers; [ ShamrockLee ];
}
''
set -eu -o pipefail
echo >&2 Testing mixed closures...
echo >&2 Checking all samples "(''${samples[*]})" "$collectiveClosure"
diff -U3 \
<(sort <"$collectiveClosure") \
<(cat "''${closures[@]}" | sort | uniq)
touch "$out"
''