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unsafeDiscardReferences

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Adds a new boolean structured attribute
`outputChecks.<output>.unsafeDiscardReferences` which disables scanning
an output for runtime references.

    __structuredAttrs = true;
    outputChecks.out.unsafeDiscardReferences = true;

This is useful when creating filesystem images containing their own embedded Nix
store: they are self-contained blobs of data with no runtime dependencies.

Setting this attribute requires the experimental feature
`discard-references` to be enabled.
This commit is contained in:
Naïm Favier 2022-09-23 23:30:29 +02:00
parent 15341334b5
commit 15f7fa59be
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GPG key ID: 95AFCE8211908325
7 changed files with 58 additions and 7 deletions
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9
tests/check-refs.nix
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@ -67,4 +67,13 @@ rec {
disallowedReferences = [test5];
};
test11 = makeTest 11 {
__structuredAttrs = true;
outputChecks.out = {
unsafeDiscardReferences = true;
allowedReferences = [];
};
buildCommand = ''echo ${dep} > "''${outputs[out]}"'';
};
}

9
tests/check-refs.sh
View file

@ -40,3 +40,12 @@ nix-build -o $RESULT check-refs.nix -A test7
# test10 should succeed (no disallowed references).
nix-build -o $RESULT check-refs.nix -A test10
if isDaemonNewer 2.12pre20230103; then
enableFeatures discard-references
restartDaemon
# test11 should succeed.
test11=$(nix-build -o $RESULT check-refs.nix -A test11)
[[ -z $(nix-store -q --references "$test11") ]]
fi