lix/src/libstore/local-fs-store.hh
Eelco Dolstra 4202a3bc4e UDSRemoteStore: Support the 'root' store parameter
Useful when we're using a daemon with a chroot store, e.g.

  $ NIX_DAEMON_SOCKET_PATH=/tmp/chroot/nix/var/nix/daemon-socket/socket nix-daemon --store /tmp/chroot

Then the client can now connect with

  $ nix build --store unix:///tmp/chroot/nix/var/nix/daemon-socket/socket?root=/tmp/chroot nixpkgs#hello
2021-06-18 17:04:11 +02:00

52 lines
1.7 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"};
const PathSetting realStoreDir{(StoreConfig*) this, false,
rootDir != "" ? rootDir + "/nix/store" : storeDir, "real",
"physical path to the Nix store"};
};
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 realStoreDir; }
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;
};
}