forked from lix-project/lix
410 lines
13 KiB
C++
410 lines
13 KiB
C++
#include "archive.hh"
|
||
#include "binary-cache-store.hh"
|
||
#include "compression.hh"
|
||
#include "derivations.hh"
|
||
#include "fs-accessor.hh"
|
||
#include "globals.hh"
|
||
#include "nar-info.hh"
|
||
#include "sync.hh"
|
||
#include "remote-fs-accessor.hh"
|
||
#include "nar-info-disk-cache.hh"
|
||
#include "nar-accessor.hh"
|
||
#include "json.hh"
|
||
|
||
#include <chrono>
|
||
|
||
#include <future>
|
||
|
||
namespace nix {
|
||
|
||
/* Given requests for a path /nix/store/<x>/<y>, this accessor will
|
||
first download the NAR for /nix/store/<x> from the binary cache,
|
||
build a NAR accessor for that NAR, and use that to access <y>. */
|
||
struct BinaryCacheStoreAccessor : public FSAccessor
|
||
{
|
||
ref<BinaryCacheStore> store;
|
||
|
||
std::map<Path, ref<FSAccessor>> nars;
|
||
|
||
BinaryCacheStoreAccessor(ref<BinaryCacheStore> store)
|
||
: store(store)
|
||
{
|
||
}
|
||
|
||
std::pair<ref<FSAccessor>, Path> fetch(const Path & path_)
|
||
{
|
||
auto path = canonPath(path_);
|
||
|
||
auto storePath = store->toStorePath(path);
|
||
std::string restPath = std::string(path, storePath.size());
|
||
|
||
if (!store->isValidPath(storePath))
|
||
throw InvalidPath(format("path '%1%' is not a valid store path") % storePath);
|
||
|
||
auto i = nars.find(storePath);
|
||
if (i != nars.end()) return {i->second, restPath};
|
||
|
||
StringSink sink;
|
||
store->narFromPath(storePath, sink);
|
||
|
||
auto accessor = makeNarAccessor(sink.s);
|
||
nars.emplace(storePath, accessor);
|
||
return {accessor, restPath};
|
||
}
|
||
|
||
Stat stat(const Path & path) override
|
||
{
|
||
auto res = fetch(path);
|
||
return res.first->stat(res.second);
|
||
}
|
||
|
||
StringSet readDirectory(const Path & path) override
|
||
{
|
||
auto res = fetch(path);
|
||
return res.first->readDirectory(res.second);
|
||
}
|
||
|
||
std::string readFile(const Path & path) override
|
||
{
|
||
auto res = fetch(path);
|
||
return res.first->readFile(res.second);
|
||
}
|
||
|
||
std::string readLink(const Path & path) override
|
||
{
|
||
auto res = fetch(path);
|
||
return res.first->readLink(res.second);
|
||
}
|
||
};
|
||
|
||
BinaryCacheStore::BinaryCacheStore(const Params & params)
|
||
: Store(params)
|
||
{
|
||
if (secretKeyFile != "")
|
||
secretKey = std::unique_ptr<SecretKey>(new SecretKey(readFile(secretKeyFile)));
|
||
|
||
StringSink sink;
|
||
sink << narVersionMagic1;
|
||
narMagic = *sink.s;
|
||
}
|
||
|
||
void BinaryCacheStore::init()
|
||
{
|
||
std::string cacheInfoFile = "nix-cache-info";
|
||
|
||
auto cacheInfo = getFile(cacheInfoFile);
|
||
if (!cacheInfo) {
|
||
upsertFile(cacheInfoFile, "StoreDir: " + storeDir + "\n", "text/x-nix-cache-info");
|
||
} else {
|
||
for (auto & line : tokenizeString<Strings>(*cacheInfo, "\n")) {
|
||
size_t colon = line.find(':');
|
||
if (colon == std::string::npos) continue;
|
||
auto name = line.substr(0, colon);
|
||
auto value = trim(line.substr(colon + 1, std::string::npos));
|
||
if (name == "StoreDir") {
|
||
if (value != storeDir)
|
||
throw Error(format("binary cache '%s' is for Nix stores with prefix '%s', not '%s'")
|
||
% getUri() % value % storeDir);
|
||
} else if (name == "WantMassQuery") {
|
||
wantMassQuery_ = value == "1";
|
||
} else if (name == "Priority") {
|
||
string2Int(value, priority);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
std::shared_ptr<std::string> BinaryCacheStore::getFile(const std::string & path)
|
||
{
|
||
std::promise<std::shared_ptr<std::string>> promise;
|
||
getFile(path,
|
||
[&](std::shared_ptr<std::string> result) {
|
||
promise.set_value(result);
|
||
},
|
||
[&](std::exception_ptr exc) {
|
||
promise.set_exception(exc);
|
||
});
|
||
return promise.get_future().get();
|
||
}
|
||
|
||
Path BinaryCacheStore::narInfoFileFor(const Path & storePath)
|
||
{
|
||
assertStorePath(storePath);
|
||
return storePathToHash(storePath) + ".narinfo";
|
||
}
|
||
|
||
void BinaryCacheStore::addToStore(const ValidPathInfo & info, const ref<std::string> & nar,
|
||
RepairFlag repair, CheckSigsFlag checkSigs, std::shared_ptr<FSAccessor> accessor)
|
||
{
|
||
if (!repair && isValidPath(info.path)) return;
|
||
|
||
/* Verify that all references are valid. This may do some .narinfo
|
||
reads, but typically they'll already be cached. */
|
||
for (auto & ref : info.references)
|
||
try {
|
||
if (ref != info.path)
|
||
queryPathInfo(ref);
|
||
} catch (InvalidPath &) {
|
||
throw Error(format("cannot add '%s' to the binary cache because the reference '%s' is not valid")
|
||
% info.path % ref);
|
||
}
|
||
|
||
auto narInfoFile = narInfoFileFor(info.path);
|
||
|
||
assert(nar->compare(0, narMagic.size(), narMagic) == 0);
|
||
|
||
auto narInfo = make_ref<NarInfo>(info);
|
||
|
||
narInfo->narSize = nar->size();
|
||
narInfo->narHash = hashString(htSHA256, *nar);
|
||
|
||
if (info.narHash && info.narHash != narInfo->narHash)
|
||
throw Error(format("refusing to copy corrupted path '%1%' to binary cache") % info.path);
|
||
|
||
auto accessor_ = std::dynamic_pointer_cast<BinaryCacheStoreAccessor>(accessor);
|
||
|
||
/* Optionally write a JSON file containing a listing of the
|
||
contents of the NAR. */
|
||
if (writeNARListing) {
|
||
std::ostringstream jsonOut;
|
||
|
||
{
|
||
JSONObject jsonRoot(jsonOut);
|
||
jsonRoot.attr("version", 1);
|
||
|
||
auto narAccessor = makeNarAccessor(nar);
|
||
|
||
if (accessor_)
|
||
accessor_->nars.emplace(info.path, narAccessor);
|
||
|
||
std::function<void(const Path &, JSONPlaceholder &)> recurse;
|
||
|
||
recurse = [&](const Path & path, JSONPlaceholder & res) {
|
||
auto st = narAccessor->stat(path);
|
||
|
||
auto obj = res.object();
|
||
|
||
switch (st.type) {
|
||
case FSAccessor::Type::tRegular:
|
||
obj.attr("type", "regular");
|
||
obj.attr("size", st.fileSize);
|
||
if (st.isExecutable)
|
||
obj.attr("executable", true);
|
||
break;
|
||
case FSAccessor::Type::tDirectory:
|
||
obj.attr("type", "directory");
|
||
{
|
||
auto res2 = obj.object("entries");
|
||
for (auto & name : narAccessor->readDirectory(path)) {
|
||
auto res3 = res2.placeholder(name);
|
||
recurse(path + "/" + name, res3);
|
||
}
|
||
}
|
||
break;
|
||
case FSAccessor::Type::tSymlink:
|
||
obj.attr("type", "symlink");
|
||
obj.attr("target", narAccessor->readLink(path));
|
||
break;
|
||
default:
|
||
abort();
|
||
}
|
||
};
|
||
|
||
{
|
||
auto res = jsonRoot.placeholder("root");
|
||
recurse("", res);
|
||
}
|
||
}
|
||
|
||
upsertFile(storePathToHash(info.path) + ".ls", jsonOut.str(), "application/json");
|
||
}
|
||
|
||
else {
|
||
if (accessor_)
|
||
accessor_->nars.emplace(info.path, makeNarAccessor(nar));
|
||
}
|
||
|
||
/* Compress the NAR. */
|
||
narInfo->compression = compression;
|
||
auto now1 = std::chrono::steady_clock::now();
|
||
auto narCompressed = compress(compression, *nar);
|
||
auto now2 = std::chrono::steady_clock::now();
|
||
narInfo->fileHash = hashString(htSHA256, *narCompressed);
|
||
narInfo->fileSize = narCompressed->size();
|
||
|
||
auto duration = std::chrono::duration_cast<std::chrono::milliseconds>(now2 - now1).count();
|
||
printMsg(lvlTalkative, format("copying path '%1%' (%2% bytes, compressed %3$.1f%% in %4% ms) to binary cache")
|
||
% narInfo->path % narInfo->narSize
|
||
% ((1.0 - (double) narCompressed->size() / nar->size()) * 100.0)
|
||
% duration);
|
||
|
||
/* Atomically write the NAR file. */
|
||
narInfo->url = "nar/" + narInfo->fileHash.to_string(Base32, false) + ".nar"
|
||
+ (compression == "xz" ? ".xz" :
|
||
compression == "bzip2" ? ".bz2" :
|
||
compression == "br" ? ".br" :
|
||
"");
|
||
if (repair || !fileExists(narInfo->url)) {
|
||
stats.narWrite++;
|
||
upsertFile(narInfo->url, *narCompressed, "application/x-nix-nar");
|
||
} else
|
||
stats.narWriteAverted++;
|
||
|
||
stats.narWriteBytes += nar->size();
|
||
stats.narWriteCompressedBytes += narCompressed->size();
|
||
stats.narWriteCompressionTimeMs += duration;
|
||
|
||
/* Atomically write the NAR info file.*/
|
||
if (secretKey) narInfo->sign(*secretKey);
|
||
|
||
upsertFile(narInfoFile, narInfo->to_string(), "text/x-nix-narinfo");
|
||
|
||
auto hashPart = storePathToHash(narInfo->path);
|
||
|
||
{
|
||
auto state_(state.lock());
|
||
state_->pathInfoCache.upsert(hashPart, std::shared_ptr<NarInfo>(narInfo));
|
||
}
|
||
|
||
if (diskCache)
|
||
diskCache->upsertNarInfo(getUri(), hashPart, std::shared_ptr<NarInfo>(narInfo));
|
||
|
||
stats.narInfoWrite++;
|
||
}
|
||
|
||
bool BinaryCacheStore::isValidPathUncached(const Path & storePath)
|
||
{
|
||
// FIXME: this only checks whether a .narinfo with a matching hash
|
||
// part exists. So ‘f4kb...-foo’ matches ‘f4kb...-bar’, even
|
||
// though they shouldn't. Not easily fixed.
|
||
return fileExists(narInfoFileFor(storePath));
|
||
}
|
||
|
||
void BinaryCacheStore::narFromPath(const Path & storePath, Sink & sink)
|
||
{
|
||
auto info = queryPathInfo(storePath).cast<const NarInfo>();
|
||
|
||
auto nar = getFile(info->url);
|
||
|
||
if (!nar) throw Error(format("file '%s' missing from binary cache") % info->url);
|
||
|
||
stats.narRead++;
|
||
stats.narReadCompressedBytes += nar->size();
|
||
|
||
/* Decompress the NAR. FIXME: would be nice to have the remote
|
||
side do this. */
|
||
try {
|
||
nar = decompress(info->compression, *nar);
|
||
} catch (UnknownCompressionMethod &) {
|
||
throw Error(format("binary cache path '%s' uses unknown compression method '%s'")
|
||
% storePath % info->compression);
|
||
}
|
||
|
||
stats.narReadBytes += nar->size();
|
||
|
||
printMsg(lvlTalkative, format("exporting path '%1%' (%2% bytes)") % storePath % nar->size());
|
||
|
||
assert(nar->size() % 8 == 0);
|
||
|
||
sink((unsigned char *) nar->c_str(), nar->size());
|
||
}
|
||
|
||
void BinaryCacheStore::queryPathInfoUncached(const Path & storePath,
|
||
std::function<void(std::shared_ptr<ValidPathInfo>)> success,
|
||
std::function<void(std::exception_ptr exc)> failure)
|
||
{
|
||
auto uri = getUri();
|
||
auto act = std::make_shared<Activity>(*logger, lvlTalkative, actQueryPathInfo,
|
||
fmt("querying info about '%s' on '%s'", storePath, uri), Logger::Fields{storePath, uri});
|
||
PushActivity pact(act->id);
|
||
|
||
auto narInfoFile = narInfoFileFor(storePath);
|
||
|
||
getFile(narInfoFile,
|
||
[=](std::shared_ptr<std::string> data) {
|
||
if (!data) return success(0);
|
||
|
||
stats.narInfoRead++;
|
||
|
||
callSuccess(success, failure, (std::shared_ptr<ValidPathInfo>)
|
||
std::make_shared<NarInfo>(*this, *data, narInfoFile));
|
||
|
||
(void) act; // force Activity into this lambda to ensure it stays alive
|
||
},
|
||
failure);
|
||
}
|
||
|
||
Path BinaryCacheStore::addToStore(const string & name, const Path & srcPath,
|
||
bool recursive, HashType hashAlgo, PathFilter & filter, RepairFlag repair)
|
||
{
|
||
// FIXME: some cut&paste from LocalStore::addToStore().
|
||
|
||
/* Read the whole path into memory. This is not a very scalable
|
||
method for very large paths, but `copyPath' is mainly used for
|
||
small files. */
|
||
StringSink sink;
|
||
Hash h;
|
||
if (recursive) {
|
||
dumpPath(srcPath, sink, filter);
|
||
h = hashString(hashAlgo, *sink.s);
|
||
} else {
|
||
auto s = readFile(srcPath);
|
||
dumpString(s, sink);
|
||
h = hashString(hashAlgo, s);
|
||
}
|
||
|
||
ValidPathInfo info;
|
||
info.path = makeFixedOutputPath(recursive, h, name);
|
||
|
||
addToStore(info, sink.s, repair, CheckSigs, nullptr);
|
||
|
||
return info.path;
|
||
}
|
||
|
||
Path BinaryCacheStore::addTextToStore(const string & name, const string & s,
|
||
const PathSet & references, RepairFlag repair)
|
||
{
|
||
ValidPathInfo info;
|
||
info.path = computeStorePathForText(name, s, references);
|
||
info.references = references;
|
||
|
||
if (repair || !isValidPath(info.path)) {
|
||
StringSink sink;
|
||
dumpString(s, sink);
|
||
addToStore(info, sink.s, repair, CheckSigs, nullptr);
|
||
}
|
||
|
||
return info.path;
|
||
}
|
||
|
||
ref<FSAccessor> BinaryCacheStore::getFSAccessor()
|
||
{
|
||
return make_ref<RemoteFSAccessor>(ref<Store>(shared_from_this()));
|
||
}
|
||
|
||
std::shared_ptr<std::string> BinaryCacheStore::getBuildLog(const Path & path)
|
||
{
|
||
Path drvPath;
|
||
|
||
if (isDerivation(path))
|
||
drvPath = path;
|
||
else {
|
||
try {
|
||
auto info = queryPathInfo(path);
|
||
// FIXME: add a "Log" field to .narinfo
|
||
if (info->deriver == "") return nullptr;
|
||
drvPath = info->deriver;
|
||
} catch (InvalidPath &) {
|
||
return nullptr;
|
||
}
|
||
}
|
||
|
||
auto logPath = "log/" + baseNameOf(drvPath);
|
||
|
||
debug("fetching build log from binary cache '%s/%s'", getUri(), logPath);
|
||
|
||
return getFile(logPath);
|
||
}
|
||
|
||
}
|