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#include "create-derivation-and-realise-goal.hh"
#include "worker.hh"
namespace nix {
CreateDerivationAndRealiseGoal::CreateDerivationAndRealiseGoal(ref<SingleDerivedPath> drvReq,
const OutputsSpec & wantedOutputs, Worker & worker, BuildMode buildMode)
: Goal(worker, DerivedPath::Built { .drvPath = drvReq, .outputs = wantedOutputs })
, drvReq(drvReq)
, wantedOutputs(wantedOutputs)
, buildMode(buildMode)
{
state = &CreateDerivationAndRealiseGoal::getDerivation;
name = fmt(
"outer obtaining drv from '%s' and then building outputs %s",
drvReq->to_string(worker.store),
std::visit(overloaded {
[&](const OutputsSpec::All) -> std::string {
return "* (all of them)";
},
[&](const OutputsSpec::Names os) {
return concatStringsSep(", ", quoteStrings(os));
},
}, wantedOutputs.raw));
trace("created outer");
worker.updateProgress();
}
CreateDerivationAndRealiseGoal::~CreateDerivationAndRealiseGoal()
{
}
static StorePath pathPartOfReq(const SingleDerivedPath & req)
{
return std::visit(overloaded {
[&](const SingleDerivedPath::Opaque & bo) {
return bo.path;
},
[&](const SingleDerivedPath::Built & bfd) {
return pathPartOfReq(*bfd.drvPath);
},
}, req.raw());
}
std::string CreateDerivationAndRealiseGoal::key()
{
/* Ensure that derivations get built in order of their name,
i.e. a derivation named "aardvark" always comes before "baboon". And
substitution goals and inner derivation goals always happen before
derivation goals (due to "b$"). */
return "c$" + std::string(pathPartOfReq(*drvReq).name()) + "$" + drvReq->to_string(worker.store);
}
void CreateDerivationAndRealiseGoal::timedOut(Error && ex)
{
}
void CreateDerivationAndRealiseGoal::work()
{
(this->*state)();
}
void CreateDerivationAndRealiseGoal::addWantedOutputs(const OutputsSpec & outputs)
{
/* If we already want all outputs, there is nothing to do. */
auto newWanted = wantedOutputs.union_(outputs);
bool needRestart = !newWanted.isSubsetOf(wantedOutputs);
wantedOutputs = newWanted;
if (!needRestart) return;
if (!optDrvPath)
// haven't started steps where the outputs matter yet
return;
worker.makeDerivationGoal(*optDrvPath, outputs, buildMode);
}
void CreateDerivationAndRealiseGoal::getDerivation()
{
trace("outer init");
/* The first thing to do is to make sure that the derivation
exists. If it doesn't, it may be created through a
substitute. */
if (auto optDrvPath = [this]() -> std::optional<StorePath> {
if (buildMode != bmNormal) return std::nullopt;
auto drvPath = StorePath::dummy;
try {
drvPath = resolveDerivedPath(worker.store, *drvReq);
} catch (MissingRealisation) {
return std::nullopt;
}
return worker.evalStore.isValidPath(drvPath) || worker.store.isValidPath(drvPath)
? std::optional { drvPath }
: std::nullopt;
}()) {
trace(fmt("already have drv '%s' for '%s', can go straight to building",
worker.store.printStorePath(*optDrvPath),
drvReq->to_string(worker.store)));
loadAndBuildDerivation();
} else {
trace("need to obtain drv we want to build");
addWaitee(worker.makeGoal(DerivedPath::fromSingle(*drvReq)));
state = &CreateDerivationAndRealiseGoal::loadAndBuildDerivation;
if (waitees.empty()) work();
}
}
void CreateDerivationAndRealiseGoal::loadAndBuildDerivation()
{
trace("outer load and build derivation");
if (nrFailed != 0) {
amDone(ecFailed, Error("cannot build missing derivation '%s'", drvReq->to_string(worker.store)));
return;
}
StorePath drvPath = resolveDerivedPath(worker.store, *drvReq);
/* Build this step! */
concreteDrvGoal = worker.makeDerivationGoal(drvPath, wantedOutputs, buildMode);
addWaitee(upcast_goal(concreteDrvGoal));
state = &CreateDerivationAndRealiseGoal::buildDone;
optDrvPath = std::move(drvPath);
if (waitees.empty()) work();
}
void CreateDerivationAndRealiseGoal::buildDone()
{
trace("outer build done");
buildResult = upcast_goal(concreteDrvGoal)->getBuildResult(DerivedPath::Built {
.drvPath = drvReq,
.outputs = wantedOutputs,
});
if (buildResult.success())
amDone(ecSuccess);
else
amDone(ecFailed, Error("building '%s' failed", drvReq->to_string(worker.store)));
}
}
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