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Don't link deriver until after any delayed exception is thrown

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Otherwise, we will associate fixed-output derivations with outputs that
they did indeed produce, but which had the wrong hash. That's no good.
This commit is contained in:
John Ericson 2020-09-15 14:26:56 +00:00
parent 3ba552b245
commit c4bf219b55
1 changed files with 16 additions and 10 deletions
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18
src/libstore/build.cc
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@ -4251,22 +4251,28 @@ 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) {
/* FIXME: we will want to track this mapping in the DB whether or
not we have a drv file. */
if (useDerivation)
worker.store.linkDeriverToPath(drvPath, outputName, newInfo.path);
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. */
if (delayedException)
std::rethrow_exception(delayedException);
/* If we made it this far, we are sure the output matches the derivation
(since the delayedException would be a fixed output CA mismatch). That
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) {
/* FIXME: we will want to track this mapping in the DB whether or
not we have a drv file. */
if (useDerivation)
worker.store.linkDeriverToPath(drvPath, outputName, newInfo.path);
}
}