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CA derivations that depend on other CA derivations

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Co-authored-by: Théophane Hufschmitt <regnat@users.noreply.github.com>
This commit is contained in:
John Ericson 2020-08-22 20:44:47 +00:00
parent e0b0e18905
commit 8eb73a8724
6 changed files with 189 additions and 28 deletions
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51
src/libstore/build.cc
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@ -984,6 +984,8 @@ private:
void tryLocalBuild();
void buildDone();
void resolvedFinished();
/* Is the build hook willing to perform the build? */
HookReply tryBuildHook();
@ -1451,8 +1453,39 @@ void DerivationGoal::inputsRealised()
/* Determine the full set of input paths. */
/* First, the input derivations. */
if (useDerivation)
for (auto & [depDrvPath, wantedDepOutputs] : dynamic_cast<Derivation *>(drv.get())->inputDrvs) {
if (useDerivation) {
auto & fullDrv = *dynamic_cast<Derivation *>(drv.get());
if (!fullDrv.inputDrvs.empty() && fullDrv.type() == DerivationType::CAFloating) {
/* We are be able to resolve this derivation based on the
now-known results of dependencies. If so, we become a stub goal
aliasing that resolved derivation goal */
Derivation drvResolved { fullDrv.resolve(worker.store) };
auto pathResolved = writeDerivation(worker.store, drvResolved);
/* Add to memotable to speed up downstream goal's queries with the
original derivation. */
drvPathResolutions.lock()->insert_or_assign(drvPath, pathResolved);
auto msg = fmt("Resolved derivation: '%s' -> '%s'",
worker.store.printStorePath(drvPath),
worker.store.printStorePath(pathResolved));
act = std::make_unique<Activity>(*logger, lvlInfo, actBuildWaiting, msg,
Logger::Fields {
worker.store.printStorePath(drvPath),
worker.store.printStorePath(pathResolved),
});
auto resolvedGoal = worker.makeDerivationGoal(
pathResolved, wantedOutputs,
buildMode == bmRepair ? bmRepair : bmNormal);
addWaitee(resolvedGoal);
state = &DerivationGoal::resolvedFinished;
return;
}
for (auto & [depDrvPath, wantedDepOutputs] : fullDrv.inputDrvs) {
/* Add the relevant output closures of the input derivation
`i' as input paths. Only add the closures of output paths
that are specified as inputs. */
@ -1472,6 +1505,7 @@ void DerivationGoal::inputsRealised()
worker.store.printStorePath(drvPath), j, worker.store.printStorePath(drvPath));
}
}
}
/* Second, the input sources. */
worker.store.computeFSClosure(drv->inputSrcs, inputPaths);
@ -1893,6 +1927,9 @@ void DerivationGoal::buildDone()
done(BuildResult::Built);
}
void DerivationGoal::resolvedFinished() {
done(BuildResult::Built);
}
HookReply DerivationGoal::tryBuildHook()
{
@ -2065,7 +2102,7 @@ void linkOrCopy(const Path & from, const Path & to)
file (e.g. 32000 of ext3), which is quite possible after a
'nix-store --optimise'. FIXME: actually, why don't we just
bind-mount in this case?
It can also fail with EPERM in BeegFS v7 and earlier versions
which don't allow hard-links to other directories */
if (errno != EMLINK && errno != EPERM)
@ -4248,10 +4285,14 @@ void DerivationGoal::registerOutputs()
{
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);
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);
}
infos2.push_back(newInfo);
}
worker.store.registerValidPaths(infos2);