lix/src/libstore/dummy-store.cc
John Ericson ee97f107e8 Push getFSAccessor unsupported(...) down Store class hierarchy
More progress on issue #5729.

Instead of having it by the default method in `Store` itself, have it be
the implementation in `DummyStore` and `LegacySSHStore`. Then just the
implementations which fail to provide the method pay the "penalty" of
dealing with the icky `unimplemented` function for non-compliance.

Combined with my other recent PRs, this finally makes `Store` have no
`unsupported` calls!
2023-04-13 13:39:44 -04:00

82 lines
2.1 KiB
C++

#include "store-api.hh"
#include "callback.hh"
namespace nix {
struct DummyStoreConfig : virtual StoreConfig {
using StoreConfig::StoreConfig;
const std::string name() override { return "Dummy Store"; }
std::string doc() override
{
return
#include "dummy-store.md"
;
}
};
struct DummyStore : public virtual DummyStoreConfig, public virtual Store
{
DummyStore(const std::string scheme, const std::string uri, const Params & params)
: DummyStore(params)
{ }
DummyStore(const Params & params)
: StoreConfig(params)
, DummyStoreConfig(params)
, Store(params)
{ }
std::string getUri() override
{
return *uriSchemes().begin();
}
void queryPathInfoUncached(const StorePath & path,
Callback<std::shared_ptr<const ValidPathInfo>> callback) noexcept override
{
callback(nullptr);
}
/**
* The dummy store is incapable of *not* trusting! :)
*/
virtual std::optional<TrustedFlag> isTrustedClient() override
{
return Trusted;
}
static std::set<std::string> uriSchemes() {
return {"dummy"};
}
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 addTextToStore(
std::string_view name,
std::string_view s,
const StorePathSet & references,
RepairFlag repair) override
{ unsupported("addTextToStore"); }
void narFromPath(const StorePath & path, Sink & sink) override
{ unsupported("narFromPath"); }
void queryRealisationUncached(const DrvOutput &,
Callback<std::shared_ptr<const Realisation>> callback) noexcept override
{ callback(nullptr); }
virtual ref<FSAccessor> getFSAccessor() override
{ unsupported("getFSAccessor"); }
};
static RegisterStoreImplementation<DummyStore, DummyStoreConfig> regDummyStore;
}