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#include "lix/libstore/derivations.hh"
#include "lix/libstore/parsed-derivations.hh"
#include "lix/libstore/globals.hh"
#include "lix/libstore/store-api.hh"
#include "lix/libutil/async-collect.hh"
#include "lix/libutil/async.hh"
#include "lix/libutil/result.hh"
#include "lix/libutil/thread-pool.hh"
#include "lix/libutil/topo-sort.hh"
#include "lix/libutil/closure.hh"
#include "lix/libstore/filetransfer.hh"
#include "lix/libutil/strings.hh"
#include <kj/async.h>
#include <kj/common.h>
#include <kj/vector.h>
namespace nix {
kj::Promise<Result<void>> Store::computeFSClosure(const StorePathSet & startPaths,
StorePathSet & paths_, bool flipDirection, bool includeOutputs, bool includeDerivers)
try {
std::function<
kj::Promise<Result<std::set<StorePath>>>(const StorePath & path, ref<const ValidPathInfo>)>
queryDeps;
if (flipDirection) {
// NOLINTNEXTLINE(cppcoreguidelines-avoid-capturing-lambda-coroutines)
queryDeps = [&](const StorePath & path,
ref<const ValidPathInfo>) -> kj::Promise<Result<std::set<StorePath>>> {
try {
StorePathSet res;
StorePathSet referrers;
TRY_AWAIT(queryReferrers(path, referrers));
for (auto& ref : referrers)
if (ref != path)
res.insert(ref);
if (includeOutputs)
for (auto& i : TRY_AWAIT(queryValidDerivers(path)))
res.insert(i);
if (includeDerivers && path.isDerivation())
for (auto& [_, outPath] : TRY_AWAIT(queryDerivationOutputMap(path)))
if (TRY_AWAIT(isValidPath(outPath)))
res.insert(outPath);
co_return res;
} catch (...) {
co_return result::current_exception();
}
};
} else {
// NOLINTNEXTLINE(cppcoreguidelines-avoid-capturing-lambda-coroutines)
queryDeps = [&](const StorePath & path,
ref<const ValidPathInfo> info) -> kj::Promise<Result<std::set<StorePath>>> {
try {
StorePathSet res;
for (auto& ref : info->references)
if (ref != path)
res.insert(ref);
if (includeOutputs && path.isDerivation())
for (auto& [_, outPath] : TRY_AWAIT(queryDerivationOutputMap(path)))
if (TRY_AWAIT(isValidPath(outPath)))
res.insert(outPath);
if (includeDerivers && info->deriver && TRY_AWAIT(isValidPath(*info->deriver)))
res.insert(*info->deriver);
co_return res;
} catch (...) {
co_return result::current_exception();
}
};
}
paths_.merge(TRY_AWAIT(computeClosureAsync<StorePath>(
startPaths,
// NOLINTNEXTLINE(cppcoreguidelines-avoid-capturing-lambda-coroutines)
[&](const StorePath& path) -> kj::Promise<Result<StorePathSet>> {
try {
co_return TRY_AWAIT(queryDeps(path, TRY_AWAIT(queryPathInfo(path))));
} catch (...) {
co_return result::current_exception();
}
})));
co_return result::success();
} catch (...) {
co_return result::current_exception();
}
kj::Promise<Result<void>> Store::computeFSClosure(const StorePath & startPath,
StorePathSet & paths_, bool flipDirection, bool includeOutputs, bool includeDerivers)
try {
StorePathSet paths;
paths.insert(startPath);
TRY_AWAIT(computeFSClosure(paths, paths_, flipDirection, includeOutputs, includeDerivers));
co_return result::success();
} catch (...) {
co_return result::current_exception();
}
const ContentAddress * getDerivationCA(const BasicDerivation & drv)
{
auto out = drv.outputs.find("out");
if (out == drv.outputs.end())
return nullptr;
if (auto dof = std::get_if<DerivationOutput::CAFixed>(&out->second.raw)) {
return &dof->ca;
}
return nullptr;
}
namespace {
struct QueryMissingContext
{
Store & store;
struct State
{
std::unordered_set<std::string> done;
StorePathSet & unknown, & willSubstitute, & willBuild;
uint64_t & downloadSize;
uint64_t & narSize;
};
struct DrvState
{
size_t left;
bool done = false;
StorePathSet outPaths;
DrvState(size_t left) : left(left) { }
};
State state;
explicit QueryMissingContext(
Store & store,
StorePathSet & willBuild_,
StorePathSet & willSubstitute_,
StorePathSet & unknown_,
uint64_t & downloadSize_,
uint64_t & narSize_
)
: store(store)
, state{{}, unknown_, willSubstitute_, willBuild_, downloadSize_, narSize_}
{
}
KJ_DISALLOW_COPY_AND_MOVE(QueryMissingContext);
kj::Promise<Result<void>> queryMissing(const std::vector<DerivedPath> & targets);
kj::Promise<Result<void>>
enqueueDerivedPaths(DerivedPathOpaque inputDrv, const StringSet & inputNode)
try {
if (!inputNode.empty()) {
TRY_AWAIT(doPath(DerivedPath::Built{std::move(inputDrv), inputNode}));
}
co_return result::success();
} catch (...) {
co_return result::current_exception();
}
kj::Promise<Result<void>> mustBuildDrv(const StorePath & drvPath, const Derivation & drv)
try {
state.willBuild.insert(drvPath);
TRY_AWAIT(asyncSpread(drv.inputDrvs, [&](const auto & input) {
const auto & [inputDrv, inputNode] = input;
return enqueueDerivedPaths(makeConstantStorePath(inputDrv), inputNode);
}));
co_return result::success();
} catch (...) {
co_return result::current_exception();
}
kj::Promise<Result<void>> checkOutput(
const StorePath & drvPath,
ref<Derivation> drv,
const StorePath & outPath,
DrvState & drvState
)
try {
SubstitutablePathInfos infos;
auto * cap = getDerivationCA(*drv);
TRY_AWAIT(store.querySubstitutablePathInfos(
{
{
outPath,
cap ? std::optional{*cap} : std::nullopt,
},
},
infos
));
if (infos.empty()) {
drvState.done = true;
TRY_AWAIT(mustBuildDrv(drvPath, *drv));
} else {
{
if (drvState.done) {
co_return result::success();
}
assert(drvState.left);
drvState.left--;
drvState.outPaths.insert(outPath);
if (!drvState.left) {
TRY_AWAIT(asyncSpread(drvState.outPaths, [&](auto & path) {
return doPath(DerivedPath::Opaque{path});
}));
}
}
}
co_return result::success();
} catch (...) {
co_return result::current_exception();
}
kj::Promise<Result<void>> doPath(DerivedPath req)
{
if (!state.done.insert(req.to_string(store)).second) {
return {result::success()};
}
return std::visit(
overloaded{
[&](DerivedPath::Built bfd) { return doPathBuilt(std::move(bfd)); },
[&](DerivedPath::Opaque bo) { return doPathOpaque(std::move(bo)); },
},
std::move(req.raw())
);
}
kj::Promise<Result<void>> doPathBuilt(DerivedPath::Built bfd)
try {
auto & drvPath = bfd.drvPath.path;
if (!TRY_AWAIT(store.isValidPath(drvPath))) {
// FIXME: we could try to substitute the derivation.
state.unknown.insert(drvPath);
co_return result::success();
}
StorePathSet invalid;
for (auto & [outputName, path] : TRY_AWAIT(store.queryDerivationOutputMap(drvPath))) {
if (bfd.outputs.contains(outputName) && !TRY_AWAIT(store.isValidPath(path))) {
invalid.insert(path);
}
}
if (invalid.empty()) {
co_return result::success();
}
auto drv = make_ref<Derivation>(TRY_AWAIT(store.derivationFromPath(drvPath)));
ParsedDerivation parsedDrv(StorePath(drvPath), *drv);
if (settings.useSubstitutes && parsedDrv.substitutesAllowed()) {
DrvState drvState(invalid.size());
TRY_AWAIT(asyncSpread(invalid, [&](auto & output) {
return checkOutput(drvPath, drv, output, drvState);
}));
} else {
TRY_AWAIT(mustBuildDrv(drvPath, *drv));
}
co_return result::success();
} catch (...) {
co_return result::current_exception();
}
kj::Promise<Result<void>> doPathOpaque(DerivedPath::Opaque bo)
try {
if (TRY_AWAIT(store.isValidPath(bo.path))) {
co_return result::success();
}
SubstitutablePathInfos infos;
TRY_AWAIT(store.querySubstitutablePathInfos({{bo.path, std::nullopt}}, infos));
if (infos.empty()) {
state.unknown.insert(bo.path);
co_return result::success();
}
auto info = infos.find(bo.path);
assert(info != infos.end());
state.willSubstitute.insert(bo.path);
state.downloadSize += info->second.downloadSize;
state.narSize += info->second.narSize;
TRY_AWAIT(asyncSpread(info->second.references, [&](auto & ref) {
return doPath(DerivedPath::Opaque{ref});
}));
co_return result::success();
} catch (...) {
co_return result::current_exception();
}
};
}
kj::Promise<Result<void>> QueryMissingContext::queryMissing(const std::vector<DerivedPath> & targets)
try {
TRY_AWAIT(asyncSpread(targets, [&](auto & path) { return doPath(path); }));
co_return result::success();
} catch (...) {
co_return result::current_exception();
}
kj::Promise<Result<void>> Store::queryMissing(const std::vector<DerivedPath> & targets,
StorePathSet & willBuild_, StorePathSet & willSubstitute_, StorePathSet & unknown_,
uint64_t & downloadSize_, uint64_t & narSize_)
try {
auto act = logger->startActivity(lvlDebug, actUnknown, "querying info about missing paths");
downloadSize_ = narSize_ = 0;
TRY_AWAIT(
QueryMissingContext{*this, willBuild_, willSubstitute_, unknown_, downloadSize_, narSize_}
.queryMissing(targets)
);
co_return result::success();
} catch (...) {
co_return result::current_exception();
}
kj::Promise<Result<StorePaths>> Store::topoSortPaths(const StorePathSet & paths)
try {
co_return TRY_AWAIT(topoSortAsync(paths,
// NOLINTNEXTLINE(cppcoreguidelines-avoid-capturing-lambda-coroutines)
{[&](const StorePath & path) -> kj::Promise<Result<StorePathSet>> {
try {
co_return TRY_AWAIT(queryPathInfo(path))->references;
} catch (InvalidPath &) {
co_return StorePathSet();
} catch (...) {
co_return result::current_exception();
}
}},
{[&](const StorePath & path, const StorePath & parent) {
return BuildError(
"cycle detected in the references of '%s' from '%s'",
printStorePath(path),
printStorePath(parent));
}}));
} catch (...) {
co_return result::current_exception();
}
kj::Promise<Result<OutputPathMap>>
resolveDerivedPath(Store & store, const DerivedPath::Built & bfd, Store * evalStore_)
try {
auto drvPath = bfd.drvPath.path;
auto outputs_ = TRY_AWAIT(store.queryDerivationOutputMap(drvPath, evalStore_));
co_return std::visit(overloaded {
[&](const OutputsSpec::All &) {
// Keep all outputs
return std::move(outputs_);
},
[&](const OutputsSpec::Names & names) {
// Get just those mentioned by name
std::map<std::string, StorePath> outputsOpt;
for (auto & output : names) {
auto * pOutputPathOpt = get(outputs_, output);
if (!pOutputPathOpt)
throw Error(
"the derivation '%s' doesn't have an output named '%s'",
bfd.drvPath.to_string(store), output);
outputsOpt.insert_or_assign(output, std::move(*pOutputPathOpt));
}
return outputsOpt;
},
}, bfd.outputs.raw);
} catch (...) {
co_return result::current_exception();
}
}
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