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Merge branch 'master' of github.com:NixOS/nix into hash-always-has-type

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This commit is contained in:
Carlo Nucera 2020-07-15 17:19:56 -04:00
commit d090562348
36 changed files with 394 additions and 354 deletions
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43
src/libstore/export-import.cc
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@ -7,24 +7,6 @@
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 StorePathSet & paths, Sink & sink)
{
auto sorted = topoSortPaths(paths);
@ -47,28 +29,29 @@ void Store::exportPath(const StorePath & path, Sink & sink)
{
auto info = queryPathInfo(path);
HashAndWriteSink hashAndWriteSink(sink);
HashSink hashSink(htSHA256);
TeeSink teeSink(sink, hashSink);
narFromPath(path, hashAndWriteSink);
narFromPath(path, teeSink);
/* 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();
Hash hash = hashSink.currentHash().first;
if (hash != info->narHash && info->narHash != Hash(info->narHash->type))
throw Error("hash of path '%s' has changed from '%s' to '%s'!",
printStorePath(path), info->narHash->to_string(Base32, true), hash.to_string(Base32, true));
hashAndWriteSink
teeSink
<< exportMagic
<< printStorePath(path);
writeStorePaths(*this, hashAndWriteSink, info->references);
hashAndWriteSink
writeStorePaths(*this, teeSink, info->references);
teeSink
<< (info->deriver ? printStorePath(*info->deriver) : "")
<< 0;
}
StorePaths Store::importPaths(Source & source, std::shared_ptr<FSAccessor> accessor, CheckSigsFlag checkSigs)
StorePaths Store::importPaths(Source & source, CheckSigsFlag checkSigs)
{
StorePaths res;
while (true) {
@ -77,7 +60,7 @@ StorePaths Store::importPaths(Source & source, std::shared_ptr<FSAccessor> acces
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);
TeeParseSink tee(source);
parseDump(tee, tee.source);
uint32_t magic = readInt(source);
@ -94,16 +77,16 @@ StorePaths Store::importPaths(Source & source, std::shared_ptr<FSAccessor> acces
if (deriver != "")
info.deriver = parseStorePath(deriver);
info.narHash = hashString(htSHA256, *tee.source.data);
info.narSize = tee.source.data->size();
info.narHash = hashString(htSHA256, *tee.saved.s);
info.narSize = tee.saved.s->size();
// Ignore optional legacy signature.
if (readInt(source) == 1)
readString(source);
// Can't use underlying source, which would have been exhausted
auto source = StringSource { *tee.source.data };
addToStore(info, source, NoRepair, checkSigs, accessor);
auto source = StringSource { *tee.saved.s };
addToStore(info, source, NoRepair, checkSigs);
res.push_back(info.path);
}