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https://github.com/NixOS/nix
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Remove addPathToAccessor
This commit is contained in:
Eelco Dolstra
parent
542ae5c8f8
commit
fdbbcc4492
9 changed files with 97 additions and 109 deletions
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@ -17,6 +17,66 @@
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namespace nix {
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/* Given requests for a path /nix/store/<x>/<y>, this accessor will
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first download the NAR for /nix/store/<x> from the binary cache,
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build a NAR accessor for that NAR, and use that to access <y>. */
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struct BinaryCacheStoreAccessor : public FSAccessor
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{
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ref<BinaryCacheStore> store;
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std::map<Path, ref<FSAccessor>> nars;
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BinaryCacheStoreAccessor(ref<BinaryCacheStore> store)
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: store(store)
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{
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}
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std::pair<ref<FSAccessor>, Path> fetch(const Path & path_)
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{
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auto path = canonPath(path_);
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auto storePath = store->toStorePath(path);
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std::string restPath = std::string(path, storePath.size());
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if (!store->isValidPath(storePath))
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throw InvalidPath(format("path ‘%1%’ is not a valid store path") % storePath);
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auto i = nars.find(storePath);
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if (i != nars.end()) return {i->second, restPath};
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StringSink sink;
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store->narFromPath(storePath, sink);
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auto accessor = makeNarAccessor(sink.s);
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nars.emplace(storePath, accessor);
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return {accessor, restPath};
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}
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Stat stat(const Path & path) override
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{
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auto res = fetch(path);
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return res.first->stat(res.second);
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}
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StringSet readDirectory(const Path & path) override
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{
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auto res = fetch(path);
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return res.first->readDirectory(res.second);
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}
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std::string readFile(const Path & path) override
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{
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auto res = fetch(path);
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return res.first->readFile(res.second);
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}
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std::string readLink(const Path & path) override
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{
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auto res = fetch(path);
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return res.first->readLink(res.second);
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}
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};
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BinaryCacheStore::BinaryCacheStore(const Params & params)
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: Store(params)
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, compression(get(params, "compression", "xz"))
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@ -82,7 +142,7 @@ Path BinaryCacheStore::narInfoFileFor(const Path & storePath)
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}
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void BinaryCacheStore::addToStore(const ValidPathInfo & info, const ref<std::string> & nar,
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bool repair, bool dontCheckSigs)
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bool repair, bool dontCheckSigs, std::shared_ptr<FSAccessor> accessor)
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{
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if (!repair && isValidPath(info.path)) return;
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@ -109,6 +169,8 @@ void BinaryCacheStore::addToStore(const ValidPathInfo & info, const ref<std::str
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if (info.narHash && info.narHash != narInfo->narHash)
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throw Error(format("refusing to copy corrupted path ‘%1%’ to binary cache") % info.path);
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auto accessor_ = std::dynamic_pointer_cast<BinaryCacheStoreAccessor>(accessor);
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/* Optionally write a JSON file containing a listing of the
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contents of the NAR. */
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if (writeNARListing) {
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@ -118,12 +180,15 @@ void BinaryCacheStore::addToStore(const ValidPathInfo & info, const ref<std::str
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JSONObject jsonRoot(jsonOut);
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jsonRoot.attr("version", 1);
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auto accessor = makeNarAccessor(nar);
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auto narAccessor = makeNarAccessor(nar);
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if (accessor_)
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accessor_->nars.emplace(info.path, narAccessor);
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std::function<void(const Path &, JSONPlaceholder &)> recurse;
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recurse = [&](const Path & path, JSONPlaceholder & res) {
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auto st = accessor->stat(path);
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auto st = narAccessor->stat(path);
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auto obj = res.object();
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@ -138,7 +203,7 @@ void BinaryCacheStore::addToStore(const ValidPathInfo & info, const ref<std::str
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obj.attr("type", "directory");
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{
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auto res2 = obj.object("entries");
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for (auto & name : accessor->readDirectory(path)) {
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for (auto & name : narAccessor->readDirectory(path)) {
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auto res3 = res2.placeholder(name);
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recurse(path + "/" + name, res3);
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}
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@ -146,7 +211,7 @@ void BinaryCacheStore::addToStore(const ValidPathInfo & info, const ref<std::str
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break;
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case FSAccessor::Type::tSymlink:
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obj.attr("type", "symlink");
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obj.attr("target", accessor->readLink(path));
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obj.attr("target", narAccessor->readLink(path));
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break;
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default:
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abort();
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@ -162,6 +227,11 @@ void BinaryCacheStore::addToStore(const ValidPathInfo & info, const ref<std::str
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upsertFile(storePathToHash(info.path) + ".ls.xz", *compress("xz", jsonOut.str()));
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}
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else {
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if (accessor_)
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accessor_->nars.emplace(info.path, makeNarAccessor(nar));
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}
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/* Compress the NAR. */
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narInfo->compression = compression;
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auto now1 = std::chrono::steady_clock::now();
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@ -286,7 +356,7 @@ Path BinaryCacheStore::addToStore(const string & name, const Path & srcPath,
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ValidPathInfo info;
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info.path = makeFixedOutputPath(recursive, h, name);
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addToStore(info, sink.s, repair);
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addToStore(info, sink.s, repair, false, 0);
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return info.path;
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}
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@ -301,84 +371,16 @@ Path BinaryCacheStore::addTextToStore(const string & name, const string & s,
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if (repair || !isValidPath(info.path)) {
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StringSink sink;
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dumpString(s, sink);
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addToStore(info, sink.s, repair);
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addToStore(info, sink.s, repair, false, 0);
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}
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return info.path;
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}
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/* Given requests for a path /nix/store/<x>/<y>, this accessor will
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first download the NAR for /nix/store/<x> from the binary cache,
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build a NAR accessor for that NAR, and use that to access <y>. */
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struct BinaryCacheStoreAccessor : public FSAccessor
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{
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ref<BinaryCacheStore> store;
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std::map<Path, ref<FSAccessor>> nars;
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BinaryCacheStoreAccessor(ref<BinaryCacheStore> store)
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: store(store)
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{
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}
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std::pair<ref<FSAccessor>, Path> fetch(const Path & path_)
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{
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auto path = canonPath(path_);
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auto storePath = store->toStorePath(path);
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std::string restPath = std::string(path, storePath.size());
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if (!store->isValidPath(storePath))
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throw InvalidPath(format("path ‘%1%’ is not a valid store path") % storePath);
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auto i = nars.find(storePath);
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if (i != nars.end()) return {i->second, restPath};
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StringSink sink;
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store->narFromPath(storePath, sink);
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auto accessor = makeNarAccessor(sink.s);
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nars.emplace(storePath, accessor);
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return {accessor, restPath};
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}
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Stat stat(const Path & path) override
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{
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auto res = fetch(path);
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return res.first->stat(res.second);
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}
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StringSet readDirectory(const Path & path) override
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{
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auto res = fetch(path);
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return res.first->readDirectory(res.second);
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}
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std::string readFile(const Path & path) override
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{
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auto res = fetch(path);
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return res.first->readFile(res.second);
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}
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std::string readLink(const Path & path) override
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{
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auto res = fetch(path);
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return res.first->readLink(res.second);
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}
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};
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ref<FSAccessor> BinaryCacheStore::getFSAccessor()
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{
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return make_ref<BinaryCacheStoreAccessor>(ref<BinaryCacheStore>(
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std::dynamic_pointer_cast<BinaryCacheStore>(shared_from_this())));
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}
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void BinaryCacheStore::addPathToAccessor(ref<FSAccessor> accessor,
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const Path & storePath, const ref<std::string> & data)
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{
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auto accessor_ = accessor.dynamic_pointer_cast<BinaryCacheStoreAccessor>();
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if (accessor_)
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accessor_->nars.emplace(storePath, makeNarAccessor(data));
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}
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}
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