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StorePath: Rewrite in C++

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On nix-env -qa -f '<nixpkgs>', this reduces maximum RSS by 20970 KiB
and runtime by 0.8%. This is mostly because we're not parsing the hash
part as a hash anymore (just validating that it consists of base-32
characters).

Also, replace storePathToHash() by StorePath::hashPart().
This commit is contained in:
Eelco Dolstra 2020-06-16 14:16:39 +02:00
parent 72e17290d4
commit 759947bf72
21 changed files with 110 additions and 111 deletions
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10
src/libstore/local-store.cc
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@ -619,7 +619,7 @@ uint64_t LocalStore::addValidPath(State & state,
{
auto state_(Store::state.lock());
state_->pathInfoCache.upsert(storePathToHash(printStorePath(info.path)),
state_->pathInfoCache.upsert(std::string(info.path.hashPart()),
PathInfoCacheValue{ .value = std::make_shared<const ValidPathInfo>(info) });
}
@ -791,7 +791,7 @@ StorePathSet LocalStore::queryDerivationOutputs(const StorePath & path)
std::optional<StorePath> LocalStore::queryPathFromHashPart(const std::string & hashPart)
{
if (hashPart.size() != storePathHashLen) throw Error("invalid hash part");
if (hashPart.size() != StorePath::HashLen) throw Error("invalid hash part");
Path prefix = storeDir + "/" + hashPart;
@ -942,7 +942,7 @@ void LocalStore::invalidatePath(State & state, const StorePath & path)
{
auto state_(Store::state.lock());
state_->pathInfoCache.erase(storePathToHash(printStorePath(path)));
state_->pathInfoCache.erase(std::string(path.hashPart()));
}
}
@ -994,7 +994,7 @@ void LocalStore::addToStore(const ValidPathInfo & info, Source & source,
if (info.ca == "" || !info.references.count(info.path))
hashSink = std::make_unique<HashSink>(htSHA256);
else
hashSink = std::make_unique<HashModuloSink>(htSHA256, storePathToHash(printStorePath(info.path)));
hashSink = std::make_unique<HashModuloSink>(htSHA256, std::string(info.path.hashPart()));
LambdaSource wrapperSource([&](unsigned char * data, size_t len) -> size_t {
size_t n = source.read(data, len);
@ -1255,7 +1255,7 @@ bool LocalStore::verifyStore(bool checkContents, RepairFlag repair)
if (info->ca == "" || !info->references.count(info->path))
hashSink = std::make_unique<HashSink>(info->narHash.type);
else
hashSink = std::make_unique<HashModuloSink>(info->narHash.type, storePathToHash(printStorePath(info->path)));
hashSink = std::make_unique<HashModuloSink>(info->narHash.type, std::string(info->path.hashPart()));
dumpPath(Store::toRealPath(i), *hashSink);
auto current = hashSink->finish();