nix-super/src/libstore/dummy-store.cc
John Ericson 470c0501eb Ensure all store types support "real" URIs
In particular `local://<path>` and `unix://` (without any path) now
work, and mean the same things as `local` and `daemon`, respectively. We
thus now have the opportunity to desguar `local` and `daemon` early.

This will allow me to make a change to
https://github.com/NixOS/nix/pull/9839 requested during review to
desugar those earlier.

Co-authored-by: Théophane Hufschmitt <7226587+thufschmitt@users.noreply.github.com>
2024-05-21 11:56:40 -04:00

87 lines
2.5 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(std::string_view scheme, std::string_view authority, const Params & params)
: DummyStore(params)
{
if (!authority.empty())
throw UsageError("`%s` store URIs must not contain an authority part %s", scheme, authority);
}
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"); }
virtual StorePath addToStoreFromDump(
Source & dump,
std::string_view name,
FileSerialisationMethod dumpMethod = FileSerialisationMethod::Recursive,
ContentAddressMethod hashMethod = FileIngestionMethod::Recursive,
HashAlgorithm hashAlgo = HashAlgorithm::SHA256,
const StorePathSet & references = StorePathSet(),
RepairFlag repair = NoRepair) override
{ unsupported("addToStore"); }
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<SourceAccessor> getFSAccessor(bool requireValidPath) override
{ unsupported("getFSAccessor"); }
};
static RegisterStoreImplementation<DummyStore, DummyStoreConfig> regDummyStore;
}