nix-super/src/libstore/local-fs-store.hh
John Ericson 1a1af75338 Overhaul store subclassing
We embrace virtual the rest of the way, and get rid of the
`assert(false)` 0-param constructors.

We also list config base classes first, so the constructor order is
always:

  1. all the configs
  2. all the stores

Each in the same order
2020-12-20 15:47:14 +00:00

48 lines
1.5 KiB
C++

#pragma once
#include "store-api.hh"
namespace nix {
struct LocalFSStoreConfig : virtual StoreConfig
{
using StoreConfig::StoreConfig;
// FIXME: the (StoreConfig*) cast works around a bug in gcc that causes
// it to omit the call to the Setting constructor. Clang works fine
// either way.
const PathSetting rootDir{(StoreConfig*) this, true, "",
"root", "directory prefixed to all other paths"};
const PathSetting stateDir{(StoreConfig*) this, false,
rootDir != "" ? rootDir + "/nix/var/nix" : settings.nixStateDir,
"state", "directory where Nix will store state"};
const PathSetting logDir{(StoreConfig*) this, false,
rootDir != "" ? rootDir + "/nix/var/log/nix" : settings.nixLogDir,
"log", "directory where Nix will store state"};
};
class LocalFSStore : public virtual LocalFSStoreConfig, public virtual Store
{
public:
const static string drvsLogDir;
LocalFSStore(const Params & params);
void narFromPath(const StorePath & path, Sink & sink) override;
ref<FSAccessor> getFSAccessor() override;
/* Register a permanent GC root. */
Path addPermRoot(const StorePath & storePath, const Path & gcRoot);
virtual Path getRealStoreDir() { return storeDir; }
Path toRealPath(const Path & storePath) override
{
assert(isInStore(storePath));
return getRealStoreDir() + "/" + std::string(storePath, storeDir.size() + 1);
}
std::shared_ptr<std::string> getBuildLog(const StorePath & path) override;
};
}