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#include "ssh-store.hh"
#include "store-api.hh"
#include "remote-store.hh"
#include "remote-store-connection.hh"
#include "worker-protocol.hh"
#include "pool.hh"
#include "ssh.hh"
#include "strings.hh"
namespace nix {
struct SSHStoreConfig : virtual RemoteStoreConfig, virtual CommonSSHStoreConfig
{
using RemoteStoreConfig::RemoteStoreConfig;
using CommonSSHStoreConfig::CommonSSHStoreConfig;
const Setting<Path> remoteProgram{this, "nix-daemon", "remote-program",
"Path to the `nix-daemon` executable on the remote machine."};
const std::string name() override { return "Experimental SSH Store"; }
std::string doc() override
{
return
#include "ssh-store.md"
;
}
};
class SSHStore : public virtual SSHStoreConfig, public virtual RemoteStore
{
public:
// Hack for getting remote build log output.
// Intentionally not in `SSHStoreConfig` so that it doesn't appear in
// the documentation
const Setting<int> logFD{(StoreConfig*) this, -1, "log-fd", "file descriptor to which SSH's stderr is connected"};
SSHStore(const std::string & scheme, const std::string & host, const Params & params)
: StoreConfig(params)
, RemoteStoreConfig(params)
, CommonSSHStoreConfig(params)
, SSHStoreConfig(params)
, Store(params)
, RemoteStore(params)
, host(host)
, master(
host,
sshKey,
sshPublicHostKey,
// Use SSH master only if using more than 1 connection.
connections->capacity() > 1,
compress,
logFD)
{
}
static std::set<std::string> uriSchemes() { return {"ssh-ng"}; }
std::string getUri() override
{
return *uriSchemes().begin() + "://" + host;
}
// FIXME extend daemon protocol, move implementation to RemoteStore
std::optional<std::string> getBuildLogExact(const StorePath & path) override
{ unsupported("getBuildLogExact"); }
protected:
struct Connection : RemoteStore::Connection
{
std::unique_ptr<SSHMaster::Connection> sshConn;
void closeWrite() override
{
sshConn->in.close();
}
};
ref<RemoteStore::Connection> openConnection() override;
std::string host;
SSHMaster master;
void setOptions(RemoteStore::Connection & conn) override
{
/* TODO Add a way to explicitly ask for some options to be
forwarded. One option: A way to query the daemon for its
settings, and then a series of params to SSHStore like
forward-cores or forward-overridden-cores that only
override the requested settings.
*/
};
};
ref<RemoteStore::Connection> SSHStore::openConnection()
{
auto conn = make_ref<Connection>();
std::string command = remoteProgram + " --stdio";
if (remoteStore.get() != "")
command += " --store " + shellEscape(remoteStore.get());
conn->sshConn = master.startCommand(command);
conn->to = FdSink(conn->sshConn->in.get());
conn->from = FdSource(conn->sshConn->out.get());
return conn;
}
void registerSSHStore() {
StoreImplementations::add<SSHStore, SSHStoreConfig>();
}
}
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