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ssh-store: Start master on-demand

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This commit is contained in:
Shea Levy 2016-09-12 08:07:50 -04:00
parent ab31f9986c
commit 196815f700
1 changed files with 13 additions and 8 deletions
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21
src/libstore/ssh-store.cc
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@ -37,6 +37,8 @@ private:
Pid sshMaster;
string uri;
Path key;
};
SSHStore::SSHStore(string uri, const Params & params, size_t maxConnections)
@ -44,15 +46,8 @@ SSHStore::SSHStore(string uri, const Params & params, size_t maxConnections)
, RemoteStore(params, maxConnections)
, tmpDir(createTempDir("", "nix", true, true, 0700))
, socketPath((Path) tmpDir + "/ssh.sock")
, sshMaster(startProcess([&]() {
auto key = get(params, "ssh-key", "");
if (key.empty())
execlp("ssh", "ssh", "-N", "-M", "-S", socketPath.c_str(), uri.c_str(), NULL);
else
execlp("ssh", "ssh", "-N", "-M", "-S", socketPath.c_str(), "-i", key.c_str(), uri.c_str(), NULL);
throw SysError("starting ssh master");
}))
, uri(std::move(uri))
, key(get(params, "ssh-key", ""))
{
}
@ -92,6 +87,16 @@ ref<FSAccessor> SSHStore::getFSAccessor()
ref<RemoteStore::Connection> SSHStore::openConnection()
{
if ((pid_t) sshMaster == -1) {
sshMaster = startProcess([&]() {
if (key.empty())
execlp("ssh", "ssh", "-N", "-M", "-S", socketPath.c_str(), uri.c_str(), NULL);
else
execlp("ssh", "ssh", "-N", "-M", "-S", socketPath.c_str(), "-i", key.c_str(), uri.c_str(), NULL);
throw SysError("starting ssh master");
});
}
auto conn = make_ref<Connection>();
Pipe in, out;
in.create();