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#include "path-references.hh"
#include "hash.hh"
#include "archive.hh"
#include <map>
namespace nix {
PathRefScanSink::PathRefScanSink(StringSet && hashes, std::map<std::string, StorePath> && backMap)
: RefScanSink(std::move(hashes))
, backMap(std::move(backMap))
{ }
PathRefScanSink PathRefScanSink::fromPaths(const StorePathSet & refs)
{
StringSet hashes;
std::map<std::string, StorePath> backMap;
for (auto & i : refs) {
std::string hashPart(i.hashPart());
auto inserted = backMap.emplace(hashPart, i).second;
assert(inserted);
hashes.insert(hashPart);
}
return PathRefScanSink(std::move(hashes), std::move(backMap));
}
StorePathSet PathRefScanSink::getResultPaths()
{
/* Map the hashes found back to their store paths. */
StorePathSet found;
for (auto & i : getResult()) {
auto j = backMap.find(i);
assert(j != backMap.end());
found.insert(j->second);
}
return found;
}
std::pair<StorePathSet, HashResult> scanForReferences(
const std::string & path,
const StorePathSet & refs)
{
HashSink hashSink { HashType::SHA256 };
auto found = scanForReferences(hashSink, path, refs);
auto hash = hashSink.finish();
return std::pair<StorePathSet, HashResult>(found, hash);
}
StorePathSet scanForReferences(
Sink & toTee,
const Path & path,
const StorePathSet & refs)
{
PathRefScanSink refsSink = PathRefScanSink::fromPaths(refs);
TeeSink sink { refsSink, toTee };
/* Look for the hashes in the NAR dump of the path. */
sink << dumpPath(path);
return refsSink.getResultPaths();
}
}
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