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Ensure resolved CA derivations are written

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so we can link outputs to deriver and thus properly cache.
This commit is contained in:
John Ericson 2020-09-09 19:13:21 +00:00
parent 7fdbb377ba
commit 2741fffa35
2 changed files with 21 additions and 13 deletions
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25
src/libstore/build.cc
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@ -4298,11 +4298,13 @@ void DerivationGoal::registerOutputs()
/* Register each output path as valid, and register the sets of
paths referenced by each of them. If there are cycles in the
outputs, this will fail. */
{
ValidPathInfos infos2;
for (auto & [outputName, newInfo] : infos) {
infos2.push_back(newInfo);
}
worker.store.registerValidPaths(infos2);
}
/* In case of a fixed-output derivation hash mismatch, throw an
exception now that we have registered the output as valid. */
@ -4314,16 +4316,21 @@ void DerivationGoal::registerOutputs()
means it's safe to link the derivation to the output hash. We must do
that for floating CA derivations, which otherwise couldn't be cached,
but it's fine to do in all cases. */
for (auto & [outputName, newInfo] : infos) {
if (useDerivation)
bool isCaFloating = drv->type() == DerivationType::CAFloating;
auto drvPath2 = drvPath;
if (!useDerivation && isCaFloating) {
/* Once a floating CA derivations reaches this point, it
must already be resolved, so we don't bother trying to
downcast drv to get would would just be an empty
inputDrvs field. */
Derivation drv2 { *drv };
drvPath2 = writeDerivation(worker.store, drv2);
}
if (useDerivation || isCaFloating)
for (auto & [outputName, newInfo] : infos)
worker.store.linkDeriverToPath(drvPath, outputName, newInfo.path);
else {
/* Once a floating CA derivations reaches this point, it must
already be resolved, drvPath the basic derivation path, and
a file existsing at that path for sake of the DB's foreign key. */
assert(drv->type() != DerivationType::CAFloating);
}
}
}

1
src/libstore/derivations.hh
View file

@ -136,6 +136,7 @@ struct Derivation : BasicDerivation
std::optional<BasicDerivation> tryResolve(Store & store);
Derivation() = default;
Derivation(const BasicDerivation & bd) : BasicDerivation(bd) { }
Derivation(BasicDerivation && bd) : BasicDerivation(std::move(bd)) { }
};