chore(3p/nix): unvendor tvix 0.1 r/4098

Nothing is using this now, and we'll likely never pick this up again,
but we learned a lot in the process.

Every now and then this breaks in some bizarre way on channel bumps
and it's just a waste of time to maintain that.

Change-Id: Idcf2f5acd4ca7070ce18d7149cbfc0d967dc0a44
Reviewed-on: https://cl.tvl.fyi/c/depot/+/5632
Tested-by: BuildkiteCI
Reviewed-by: sterni <sternenseemann@systemli.org>
Reviewed-by: lukegb <lukegb@tvl.fyi>
Autosubmit: tazjin <tazjin@tvl.su>

1 files changed, 0 insertions, 160 deletions

diff --git a/third_party/nix/src/libstore/ssh.cc b/third_party/nix/src/libstore/ssh.cc
deleted file mode 100644
index 6043e584ddbe..000000000000
--- a/third_party/nix/src/libstore/ssh.cc
+++ /dev/null
@@ -1,160 +0,0 @@
-#include "libstore/ssh.hh"
-
-#include <utility>
-
-#include <absl/strings/match.h>
-#include <absl/strings/str_split.h>
-
-namespace nix {
-
-SSHMaster::SSHMaster(const std::string& host, std::string keyFile,
-                     bool useMaster, bool compress, int logFD)
-    : host(host),
-      fakeSSH(host == "localhost"),
-      keyFile(std::move(keyFile)),
-      useMaster(useMaster && !fakeSSH),
-      compress(compress),
-      logFD(logFD) {
-  if (host.empty() || absl::StartsWith(host, "-")) {
-    throw Error("invalid SSH host name '%s'", host);
-  }
-}
-
-void SSHMaster::addCommonSSHOpts(Strings& args) {
-  for (auto& i :
-       absl::StrSplit(getEnv("NIX_SSHOPTS").value_or(""),
-                      absl::ByAnyChar(" \t\n\r"), absl::SkipEmpty())) {
-    args.push_back(std::string(i));
-  }
-  if (!keyFile.empty()) {
-    args.insert(args.end(), {"-i", keyFile});
-  }
-  if (compress) {
-    args.push_back("-C");
-  }
-}
-
-std::unique_ptr<SSHMaster::Connection> SSHMaster::startCommand(
-    const std::string& command) {
-  Path socketPath = startMaster();
-
-  Pipe in;
-  Pipe out;
-  in.create();
-  out.create();
-
-  auto conn = std::make_unique<Connection>();
-  ProcessOptions options;
-  options.dieWithParent = false;
-
-  conn->sshPid = startProcess(
-      [&]() {
-        restoreSignals();
-
-        close(in.writeSide.get());
-        close(out.readSide.get());
-
-        if (dup2(in.readSide.get(), STDIN_FILENO) == -1) {
-          throw SysError("duping over stdin");
-        }
-        if (dup2(out.writeSide.get(), STDOUT_FILENO) == -1) {
-          throw SysError("duping over stdout");
-        }
-        if (logFD != -1 && dup2(logFD, STDERR_FILENO) == -1) {
-          throw SysError("duping over stderr");
-        }
-
-        Strings args;
-
-        if (fakeSSH) {
-          args = {"bash", "-c"};
-        } else {
-          args = {"ssh", host, "-x", "-a"};
-          addCommonSSHOpts(args);
-          if (!socketPath.empty()) {
-            args.insert(args.end(), {"-S", socketPath});
-          }
-          // TODO(tazjin): Abseil verbosity flag
-          /*if (verbosity >= lvlChatty) {
-              args.push_back("-v");
-              }*/
-        }
-
-        args.push_back(command);
-        execvp(args.begin()->c_str(), stringsToCharPtrs(args).data());
-
-        // could not exec ssh/bash
-        throw SysError("unable to execute '%s'", args.front());
-      },
-      options);
-
-  in.readSide = AutoCloseFD(-1);
-  out.writeSide = AutoCloseFD(-1);
-
-  conn->out = std::move(out.readSide);
-  conn->in = std::move(in.writeSide);
-
-  return conn;
-}
-
-Path SSHMaster::startMaster() {
-  if (!useMaster) {
-    return "";
-  }
-
-  auto state(state_.lock());
-
-  if (state->sshMaster != Pid(-1)) {
-    return state->socketPath;
-  }
-
-  state->tmpDir =
-      std::make_unique<AutoDelete>(createTempDir("", "nix", true, true, 0700));
-
-  state->socketPath = Path(*state->tmpDir) + "/ssh.sock";
-
-  Pipe out;
-  out.create();
-
-  ProcessOptions options;
-  options.dieWithParent = false;
-
-  state->sshMaster = startProcess(
-      [&]() {
-        restoreSignals();
-
-        close(out.readSide.get());
-
-        if (dup2(out.writeSide.get(), STDOUT_FILENO) == -1) {
-          throw SysError("duping over stdout");
-        }
-
-        Strings args = {"ssh", host,
-                        "-M",  "-N",
-                        "-S",  state->socketPath,
-                        "-o",  "LocalCommand=echo started",
-                        "-o",  "PermitLocalCommand=yes"};
-        // if (verbosity >= lvlChatty) { args.push_back("-v"); }
-        addCommonSSHOpts(args);
-        execvp(args.begin()->c_str(), stringsToCharPtrs(args).data());
-
-        throw SysError("unable to execute '%s'", args.front());
-      },
-      options);
-
-  out.writeSide = AutoCloseFD(-1);
-
-  std::string reply;
-  try {
-    reply = readLine(out.readSide.get());
-  } catch (EndOfFile& e) {
-  }
-
-  if (reply != "started") {
-    throw Error("failed to start SSH master connection to '%s'", host);
-  }
-
-  return state->socketPath;
-}
-
-}  // namespace nix