mirror of
https://github.com/privatevoid-net/nix-super.git
synced 2024-11-11 00:36:20 +02:00
106 lines
3 KiB
C++
106 lines
3 KiB
C++
#include "store-api.hh"
|
||
#include "archive.hh"
|
||
#include "worker-protocol.hh"
|
||
|
||
#include <algorithm>
|
||
|
||
namespace nix {
|
||
|
||
struct HashAndWriteSink : Sink
|
||
{
|
||
Sink & writeSink;
|
||
HashSink hashSink;
|
||
HashAndWriteSink(Sink & writeSink) : writeSink(writeSink), hashSink(htSHA256)
|
||
{
|
||
}
|
||
virtual void operator () (const unsigned char * data, size_t len)
|
||
{
|
||
writeSink(data, len);
|
||
hashSink(data, len);
|
||
}
|
||
Hash currentHash()
|
||
{
|
||
return hashSink.currentHash().first;
|
||
}
|
||
};
|
||
|
||
void Store::exportPaths(const Paths & paths, Sink & sink)
|
||
{
|
||
Paths sorted = topoSortPaths(PathSet(paths.begin(), paths.end()));
|
||
std::reverse(sorted.begin(), sorted.end());
|
||
|
||
std::string doneLabel("paths exported");
|
||
//logger->incExpected(doneLabel, sorted.size());
|
||
|
||
for (auto & path : sorted) {
|
||
//Activity act(*logger, lvlInfo, format("exporting path ‘%s’") % path);
|
||
sink << 1;
|
||
exportPath(path, sink);
|
||
//logger->incProgress(doneLabel);
|
||
}
|
||
|
||
sink << 0;
|
||
}
|
||
|
||
void Store::exportPath(const Path & path, Sink & sink)
|
||
{
|
||
auto info = queryPathInfo(path);
|
||
|
||
HashAndWriteSink hashAndWriteSink(sink);
|
||
|
||
narFromPath(path, hashAndWriteSink);
|
||
|
||
/* Refuse to export paths that have changed. This prevents
|
||
filesystem corruption from spreading to other machines.
|
||
Don't complain if the stored hash is zero (unknown). */
|
||
Hash hash = hashAndWriteSink.currentHash();
|
||
if (hash != info->narHash && info->narHash != Hash(info->narHash.type))
|
||
throw Error(format("hash of path ‘%1%’ has changed from ‘%2%’ to ‘%3%’!") % path
|
||
% info->narHash.to_string() % hash.to_string());
|
||
|
||
hashAndWriteSink << exportMagic << path << info->references << info->deriver << 0;
|
||
}
|
||
|
||
Paths Store::importPaths(Source & source, std::shared_ptr<FSAccessor> accessor, CheckSigsFlag checkSigs)
|
||
{
|
||
Paths res;
|
||
while (true) {
|
||
auto n = readNum<uint64_t>(source);
|
||
if (n == 0) break;
|
||
if (n != 1) throw Error("input doesn't look like something created by ‘nix-store --export’");
|
||
|
||
/* Extract the NAR from the source. */
|
||
TeeSink tee(source);
|
||
parseDump(tee, tee.source);
|
||
|
||
uint32_t magic = readInt(source);
|
||
if (magic != exportMagic)
|
||
throw Error("Nix archive cannot be imported; wrong format");
|
||
|
||
ValidPathInfo info;
|
||
|
||
info.path = readStorePath(*this, source);
|
||
|
||
//Activity act(*logger, lvlInfo, format("importing path ‘%s’") % info.path);
|
||
|
||
info.references = readStorePaths<PathSet>(*this, source);
|
||
|
||
info.deriver = readString(source);
|
||
if (info.deriver != "") assertStorePath(info.deriver);
|
||
|
||
info.narHash = hashString(htSHA256, *tee.source.data);
|
||
info.narSize = tee.source.data->size();
|
||
|
||
// Ignore optional legacy signature.
|
||
if (readInt(source) == 1)
|
||
readString(source);
|
||
|
||
addToStore(info, tee.source.data, NoRepair, checkSigs, accessor);
|
||
|
||
res.push_back(info.path);
|
||
}
|
||
|
||
return res;
|
||
}
|
||
|
||
}
|