83 lines
2.3 KiB
C++
83 lines
2.3 KiB
C++
|
#include "nar-extractor.hh"
|
||
|
|
|
||
|
|
#include "archive.hh"
|
||
|
|
|
||
|
|
#include <unordered_set>
|
||
|
|
|
||
|
|
using namespace nix;
|
||
|
|
|
||
|
|
struct Extractor : ParseSink
|
||
|
|
{
|
||
|
|
std::unordered_set<Path> filesToKeep {
|
||
|
|
"/nix-support/hydra-build-products",
|
||
|
|
"/nix-support/hydra-release-name",
|
||
|
|
"/nix-support/hydra-metrics",
|
||
|
|
};
|
||
|
|
|
||
|
|
NarMemberDatas & members;
|
||
|
|
NarMemberData * curMember = nullptr;
|
||
|
|
Path prefix;
|
||
|
|
|
||
|
|
Extractor(NarMemberDatas & members, const Path & prefix)
|
||
|
|
: members(members), prefix(prefix)
|
||
|
|
{ }
|
||
|
|
|
||
|
|
void createDirectory(const Path & path) override
|
||
|
|
{
|
||
|
|
members.insert_or_assign(prefix + path, NarMemberData { .type = FSAccessor::Type::tDirectory });
|
||
|
|
}
|
||
|
|
|
||
|
|
void createRegularFile(const Path & path) override
|
||
|
|
{
|
||
|
|
curMember = &members.insert_or_assign(prefix + path, NarMemberData {
|
||
|
|
.type = FSAccessor::Type::tRegular,
|
||
|
|
.fileSize = 0,
|
||
|
|
.contents = filesToKeep.count(path) ? std::optional("") : std::nullopt,
|
||
|
|
}).first->second;
|
||
|
|
}
|
||
|
|
|
||
|
|
std::optional<unsigned long long> expectedSize;
|
||
|
|
std::unique_ptr<HashSink> hashSink;
|
||
|
|
|
||
|
|
void preallocateContents(unsigned long long size) override
|
||
|
|
{
|
||
|
|
expectedSize = size;
|
||
|
|
hashSink = std::make_unique<HashSink>(htSHA256);
|
||
|
|
}
|
||
|
|
|
||
|
|
void receiveContents(unsigned char * data, unsigned int len) override
|
||
|
|
{
|
||
|
|
assert(expectedSize);
|
||
|
|
assert(curMember);
|
||
|
|
assert(hashSink);
|
||
|
|
*curMember->fileSize += len;
|
||
|
|
(*hashSink)(data, len);
|
||
|
|
if (curMember->contents) {
|
||
|
|
curMember->contents->append((char *) data, len);
|
||
|
|
}
|
||
|
|
assert(curMember->fileSize <= expectedSize);
|
||
|
|
if (curMember->fileSize == expectedSize) {
|
||
|
|
auto [hash, len] = hashSink->finish();
|
||
|
|
assert(curMember->fileSize == len);
|
||
|
|
curMember->sha256 = hash;
|
||
|
|
hashSink.reset();
|
||
|
|
}
|
||
|
|
}
|
||
|
|
|
||
|
|
void createSymlink(const Path & path, const string & target) override
|
||
|
|
{
|
||
|
|
members.insert_or_assign(prefix + path, NarMemberData { .type = FSAccessor::Type::tSymlink });
|
||
|
|
}
|
||
|
|
};
|
||
|
|
|
||
|
|
|
||
|
|
void extractNarData(
|
||
|
|
Source & source,
|
||
|
|
const Path & prefix,
|
||
|
|
NarMemberDatas & members)
|
||
|
|
{
|
||
|
|
Extractor extractor(members, prefix);
|
||
|
|
parseDump(extractor, source);
|
||
|
|
// Note: this point may not be reached if we're in a coroutine.
|
||
|
|
}
|