lix/src/libstore/dummy-store.cc
Eelco Dolstra 6a67e57019
Add DummyStore (dummy://)
DummyStore does not allow building or adding paths. This is useful for
evaluation tests when you don't want to initialize a "proper" store.
2020-08-24 18:54:16 +02:00

60 lines
1.7 KiB
C++

#include "store-api.hh"
namespace nix {
static std::string uriScheme = "dummy://";
struct DummyStore : public Store
{
DummyStore(const Params & params)
: Store(params)
{ }
string getUri() override
{
return uriScheme;
}
void queryPathInfoUncached(const StorePath & path,
Callback<std::shared_ptr<const ValidPathInfo>> callback) noexcept override
{
callback(nullptr);
}
std::optional<StorePath> queryPathFromHashPart(const std::string & hashPart) override
{ unsupported("queryPathFromHashPart"); }
void addToStore(const ValidPathInfo & info, Source & source,
RepairFlag repair, CheckSigsFlag checkSigs) override
{ unsupported("addToStore"); }
StorePath addToStore(const string & name, const Path & srcPath,
FileIngestionMethod method, HashType hashAlgo,
PathFilter & filter, RepairFlag repair) override
{ unsupported("addToStore"); }
StorePath addTextToStore(const string & name, const string & s,
const StorePathSet & references, RepairFlag repair) override
{ unsupported("addTextToStore"); }
void narFromPath(const StorePath & path, Sink & sink) override
{ unsupported("narFromPath"); }
void ensurePath(const StorePath & path) override
{ unsupported("ensurePath"); }
BuildResult buildDerivation(const StorePath & drvPath, const BasicDerivation & drv,
BuildMode buildMode) override
{ unsupported("buildDerivation"); }
};
static RegisterStoreImplementation regStore([](
const std::string & uri, const Store::Params & params)
-> std::shared_ptr<Store>
{
if (uri != uriScheme) return nullptr;
return std::make_shared<DummyStore>(params);
});
}