diff options
Diffstat (limited to 'third_party/nix/src/build-remote/build-remote.cc')
| -rw-r--r-- | third_party/nix/src/build-remote/build-remote.cc | 274 |
1 files changed, 0 insertions, 274 deletions
diff --git a/third_party/nix/src/build-remote/build-remote.cc b/third_party/nix/src/build-remote/build-remote.cc deleted file mode 100644 index 43564a5eb7..0000000000 --- a/third_party/nix/src/build-remote/build-remote.cc +++ /dev/null @@ -1,274 +0,0 @@ -#include <algorithm> -#include <cstdlib> -#include <cstring> -#include <iomanip> -#include <memory> -#include <set> -#include <tuple> - -#include <absl/strings/ascii.h> -#include <absl/strings/match.h> -#include <absl/strings/str_cat.h> -#include <glog/logging.h> - -#include "libmain/shared.hh" -#include "libstore/derivations.hh" -#include "libstore/globals.hh" -#include "libstore/local-store.hh" -#include "libstore/machines.hh" -#include "libstore/pathlocks.hh" -#include "libstore/store-api.hh" -#include "libutil/serialise.hh" -#include "nix/legacy.hh" - -using namespace nix; -using std::cin; - -static void handleAlarm(int sig) {} - -std::string escapeUri(std::string uri) { - std::replace(uri.begin(), uri.end(), '/', '_'); - return uri; -} - -static std::string currentLoad; - -static AutoCloseFD openSlotLock(const Machine& m, unsigned long long slot) { - return openLockFile(fmt("%s/%s-%d", currentLoad, escapeUri(m.storeUri), slot), - true); -} - -static bool allSupportedLocally(const std::set<std::string>& requiredFeatures) { - for (auto& feature : requiredFeatures) { - if (settings.systemFeatures.get().count(feature) == 0u) { - return false; - } - } - return true; -} - -static int _main(int argc, char* argv[]) { - { - /* Ensure we don't get any SSH passphrase or host key popups. */ - unsetenv("DISPLAY"); - unsetenv("SSH_ASKPASS"); - - FdSource source(STDIN_FILENO); - - /* Read the parent's settings. */ - while (readInt(source) != 0u) { - auto name = readString(source); - auto value = readString(source); - settings.set(name, value); - } - - settings.maxBuildJobs.set("1"); // hack to make tests with local?root= work - - auto store = openStore().cast<LocalStore>(); - - /* It would be more appropriate to use $XDG_RUNTIME_DIR, since - that gets cleared on reboot, but it wouldn't work on macOS. */ - currentLoad = store->stateDir + "/current-load"; - - std::shared_ptr<Store> sshStore; - AutoCloseFD bestSlotLock; - - auto machines = getMachines(); - DLOG(INFO) << "got " << machines.size() << " remote builders"; - - if (machines.empty()) { - std::cerr << "# decline-permanently\n"; - return 0; - } - - std::string drvPath; - std::string storeUri; - - while (true) { - try { - auto s = readString(source); - if (s != "try") { - return 0; - } - } catch (EndOfFile&) { - return 0; - } - - auto amWilling = readInt(source); - auto neededSystem = readString(source); - source >> drvPath; - auto requiredFeatures = readStrings<std::set<std::string>>(source); - - auto canBuildLocally = - (amWilling != 0u) && - (neededSystem == settings.thisSystem || - settings.extraPlatforms.get().count(neededSystem) > 0) && - allSupportedLocally(requiredFeatures); - - /* Error ignored here, will be caught later */ - mkdir(currentLoad.c_str(), 0777); - - while (true) { - bestSlotLock = AutoCloseFD(-1); - AutoCloseFD lock(openLockFile(currentLoad + "/main-lock", true)); - lockFile(lock.get(), ltWrite, true); - - bool rightType = false; - - Machine* bestMachine = nullptr; - unsigned long long bestLoad = 0; - for (auto& m : machines) { - DLOG(INFO) << "considering building on remote machine '" << m.storeUri - << "'"; - - if (m.enabled && - std::find(m.systemTypes.begin(), m.systemTypes.end(), - neededSystem) != m.systemTypes.end() && - m.allSupported(requiredFeatures) && - m.mandatoryMet(requiredFeatures)) { - rightType = true; - AutoCloseFD free; - unsigned long long load = 0; - for (unsigned long long slot = 0; slot < m.maxJobs; ++slot) { - auto slotLock = openSlotLock(m, slot); - if (lockFile(slotLock.get(), ltWrite, false)) { - if (!free) { - free = std::move(slotLock); - } - } else { - ++load; - } - } - if (!free) { - continue; - } - bool best = false; - if (!bestMachine || !bestSlotLock) { - best = true; - } else if (load / m.speedFactor < - bestLoad / bestMachine->speedFactor) { - best = true; - } else if (load / m.speedFactor == - bestLoad / bestMachine->speedFactor) { - if (m.speedFactor > bestMachine->speedFactor) { - best = true; - } else if (m.speedFactor == bestMachine->speedFactor) { - if (load < bestLoad) { - best = true; - } - } - } - if (best) { - bestLoad = load; - bestSlotLock = std::move(free); - bestMachine = &m; - } - } - } - - if (!bestSlotLock || !bestMachine) { - if (rightType && !canBuildLocally) { - std::cerr << "# postpone\n"; - } else { - std::cerr << "# decline\n"; - } - break; - } - - futimens(bestSlotLock.get(), nullptr); - - lock = AutoCloseFD(-1); - - try { - DLOG(INFO) << "connecting to '" << bestMachine->storeUri << "'"; - - Store::Params storeParams; - if (absl::StartsWith(bestMachine->storeUri, "ssh://")) { - storeParams["max-connections"] = "1"; - storeParams["log-fd"] = "4"; - if (!bestMachine->sshKey.empty()) { - storeParams["ssh-key"] = bestMachine->sshKey; - } - } - - sshStore = openStore(bestMachine->storeUri, storeParams); - sshStore->connect(); - storeUri = bestMachine->storeUri; - - } catch (std::exception& e) { - auto msg = absl::StripTrailingAsciiWhitespace(drainFD(5, false)); - LOG(ERROR) << "cannot build on '" << bestMachine->storeUri - << "': " << e.what() - << (msg.empty() ? "" : absl::StrCat(": ", msg)); - bestMachine->enabled = false; - continue; - } - - goto connected; - } - } - - connected: - close(5); - - std::cerr << "# accept\n" << storeUri << "\n"; - - auto inputs = readStrings<PathSet>(source); - auto outputs = readStrings<PathSet>(source); - - AutoCloseFD uploadLock = openLockFile( - currentLoad + "/" + escapeUri(storeUri) + ".upload-lock", true); - - { - DLOG(INFO) << "waiting for the upload lock to '" << storeUri << "'"; - - auto old = signal(SIGALRM, handleAlarm); - alarm(15 * 60); - if (!lockFile(uploadLock.get(), ltWrite, true)) { - LOG(ERROR) << "somebody is hogging the upload lock, continuing..."; - } - alarm(0); - signal(SIGALRM, old); - } - - auto substitute = - settings.buildersUseSubstitutes ? Substitute : NoSubstitute; - - { - DLOG(INFO) << "copying dependencies to '" << storeUri << "'"; - copyPaths(store, ref<Store>(sshStore), inputs, NoRepair, NoCheckSigs, - substitute); - } - - uploadLock = AutoCloseFD(-1); - - BasicDerivation drv( - readDerivation(store->realStoreDir + "/" + baseNameOf(drvPath))); - drv.inputSrcs = inputs; - - auto result = sshStore->buildDerivation(std::cerr, drvPath, drv); - - if (!result.success()) { - throw Error("build of '%s' on '%s' failed: %s", drvPath, storeUri, - result.errorMsg); - } - - PathSet missing; - for (auto& path : outputs) { - if (!store->isValidPath(path)) { - missing.insert(path); - } - } - - if (!missing.empty()) { - DLOG(INFO) << "copying outputs from '" << storeUri << "'"; - store->locksHeld.insert(missing.begin(), missing.end()); /* FIXME: ugly */ - copyPaths(ref<Store>(sshStore), store, missing, NoRepair, NoCheckSigs, - NoSubstitute); - } - - return 0; - } -} - -static RegisterLegacyCommand s1("build-remote", _main); |