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| -rw-r--r-- | src/nix/eval-hydra-jobs.cc | 412 |
1 files changed, 0 insertions, 412 deletions
diff --git a/src/nix/eval-hydra-jobs.cc b/src/nix/eval-hydra-jobs.cc deleted file mode 100644 index f66fb3571..000000000 --- a/src/nix/eval-hydra-jobs.cc +++ /dev/null @@ -1,412 +0,0 @@ -#include "command.hh" -#include "eval.hh" -#include "eval-inline.hh" -#include "derivations.hh" -#include "common-args.hh" -#include "json.hh" -#include "get-drvs.hh" -#include "attr-path.hh" - -#include <nlohmann/json.hpp> -#include <sys/resource.h> - -using namespace nix; - -static std::string queryMetaStrings(EvalState & state, DrvInfo & drv, const string & name, const string & subAttribute) -{ - Strings res; - std::function<void(Value & v)> rec; - - rec = [&](Value & v) { - state.forceValue(v); - if (v.type == tString) - res.push_back(v.string.s); - else if (v.isList()) - for (unsigned int n = 0; n < v.listSize(); ++n) - rec(*v.listElems()[n]); - else if (v.type == tAttrs) { - auto a = v.attrs->find(state.symbols.create(subAttribute)); - if (a != v.attrs->end()) - res.push_back(state.forceString(*a->value)); - } - }; - - Value * v = drv.queryMeta(name); - if (v) rec(*v); - - return concatStringsSep(", ", res); -} - -struct CmdEvalHydraJobs : MixJSON, MixDryRun, InstallableCommand -{ - std::optional<Path> gcRootsDir; - size_t nrWorkers = 1; - size_t maxMemorySize = 4ULL * 1024; - - CmdEvalHydraJobs() - { - mkFlag() - .longName("gc-roots-dir") - .description("garbage collector roots directory") - .labels({"path"}) - .dest(&gcRootsDir); - - mkIntFlag(0, "workers", "number of concurrent worker processes", &nrWorkers); - - mkIntFlag(0, "max-memory-size", "maximum memory usage per worker process (in MiB)", &maxMemorySize); - } - - std::string description() override - { - return "evaluate a Hydra jobset"; - } - - Examples examples() override - { - return { - Example{ - "Evaluate Nixpkgs' release-combined jobset:", - "nix eval-hydra-jobs -f '<nixpkgs/nixos/release-combined.nix>' '' --json" - }, - }; - } - - Strings getDefaultFlakeAttrPaths() override - { - return {"hydraJobs", "checks"}; - } - - void worker(AutoCloseFD & to, AutoCloseFD & from) - { - auto state = getEvalState(); - - // FIXME: should re-open state->store. - - if (dryRun) settings.readOnlyMode = true; - - /* Prevent access to paths outside of the Nix search path and - to the environment. */ - evalSettings.restrictEval = true; - - auto autoArgs = getAutoArgs(*state); - - auto vTop = installable->toValue(*state).first; - - auto vRoot = state->allocValue(); - state->autoCallFunction(*autoArgs, *vTop, *vRoot); - - while (true) { - /* Wait for the master to send us a job name. */ - writeLine(to.get(), "next"); - - auto s = readLine(from.get()); - if (s == "exit") break; - if (!hasPrefix(s, "do ")) abort(); - std::string attrPath(s, 3); - - debug("worker process %d at '%s'", getpid(), attrPath); - - /* Evaluate it and send info back to the master. */ - nlohmann::json reply; - - try { - auto v = findAlongAttrPath(*state, attrPath, *autoArgs, *vRoot).first; - - state->forceValue(*v); - - if (auto drv = getDerivation(*state, *v, false)) { - - DrvInfo::Outputs outputs = drv->queryOutputs(); - - if (drv->querySystem() == "unknown") - throw EvalError("derivation must have a 'system' attribute"); - - auto drvPath = drv->queryDrvPath(); - - nlohmann::json job; - - job["nixName"] = drv->queryName(); - job["system"] =drv->querySystem(); - job["drvPath"] = drvPath; - job["description"] = drv->queryMetaString("description"); - job["license"] = queryMetaStrings(*state, *drv, "license", "shortName"); - job["homepage"] = drv->queryMetaString("homepage"); - job["maintainers"] = queryMetaStrings(*state, *drv, "maintainers", "email"); - job["schedulingPriority"] = drv->queryMetaInt("schedulingPriority", 100); - job["timeout"] = drv->queryMetaInt("timeout", 36000); - job["maxSilent"] = drv->queryMetaInt("maxSilent", 7200); - job["isChannel"] = drv->queryMetaBool("isHydraChannel", false); - - /* If this is an aggregate, then get its constituents. */ - auto a = v->attrs->get(state->symbols.create("_hydraAggregate")); - if (a && state->forceBool(*a->value, *a->pos)) { - auto a = v->attrs->get(state->symbols.create("constituents")); - if (!a) - throw EvalError("derivation must have a ‘constituents’ attribute"); - - - PathSet context; - state->coerceToString(*a->pos, *a->value, context, true, false); - for (auto & i : context) - if (i.at(0) == '!') { - size_t index = i.find("!", 1); - job["constituents"].push_back(string(i, index + 1)); - } - - state->forceList(*a->value, *a->pos); - for (unsigned int n = 0; n < a->value->listSize(); ++n) { - auto v = a->value->listElems()[n]; - state->forceValue(*v); - if (v->type == tString) - job["namedConstituents"].push_back(state->forceStringNoCtx(*v)); - } - } - - /* Register the derivation as a GC root. !!! This - registers roots for jobs that we may have already - done. */ - auto localStore = state->store.dynamic_pointer_cast<LocalFSStore>(); - if (gcRootsDir && localStore) { - Path root = *gcRootsDir + "/" + std::string(baseNameOf(drvPath)); - if (!pathExists(root)) - localStore->addPermRoot(localStore->parseStorePath(drvPath), root, false); - } - - nlohmann::json out; - for (auto & j : outputs) - out[j.first] = j.second; - job["outputs"] = std::move(out); - - reply["job"] = std::move(job); - } - - else if (v->type == tAttrs) { - auto attrs = nlohmann::json::array(); - StringSet ss; - for (auto & i : v->attrs->lexicographicOrder()) { - std::string name(i->name); - if (name.find('.') != std::string::npos || name.find(' ') != std::string::npos) { - printError("skipping job with illegal name '%s'", name); - continue; - } - attrs.push_back(name); - } - reply["attrs"] = std::move(attrs); - } - - } catch (EvalError & e) { - reply["error"] = filterANSIEscapes(e.msg(), true); - } - - writeLine(to.get(), reply.dump()); - - /* If our RSS exceeds the maximum, exit. The master will - start a new process. */ - struct rusage r; - getrusage(RUSAGE_SELF, &r); - if ((size_t) r.ru_maxrss > maxMemorySize * 1024) break; - } - - writeLine(to.get(), "restart"); - } - - void run(ref<Store> store) override - { - settings.requireExperimentalFeature("eval-hydra-jobs"); - - if (!gcRootsDir) warn("'--gc-roots-dir' not specified"); - - struct State - { - std::set<std::string> todo{""}; - std::set<std::string> active; - nlohmann::json jobs; - std::exception_ptr exc; - }; - - std::condition_variable wakeup; - - Sync<State> state_; - - /* Start a handler thread per worker process. */ - auto handler = [this, &state_, &wakeup]() - { - try { - pid_t pid = -1; - AutoCloseFD from, to; - - while (true) { - - /* Start a new worker process if necessary. */ - if (pid == -1) { - Pipe toPipe, fromPipe; - toPipe.create(); - fromPipe.create(); - pid = startProcess( - [this, - to{std::make_shared<AutoCloseFD>(std::move(fromPipe.writeSide))}, - from{std::make_shared<AutoCloseFD>(std::move(toPipe.readSide))} - ]() - { - try { - worker(*to, *from); - } catch (std::exception & e) { - nlohmann::json err; - err["error"] = e.what(); - writeLine(to->get(), err.dump()); - } - }, - ProcessOptions { .allowVfork = false }); - from = std::move(fromPipe.readSide); - to = std::move(toPipe.writeSide); - debug("created worker process %d", pid); - } - - /* Check whether the existing worker process is still there. */ - auto s = readLine(from.get()); - if (s == "restart") { - pid = -1; - continue; - } else if (s != "next") { - auto json = nlohmann::json::parse(s); - throw Error("worker error: %s", (std::string) json["error"]); - } - - /* Wait for a job name to become available. */ - std::string attrPath; - - while (true) { - checkInterrupt(); - auto state(state_.lock()); - if ((state->todo.empty() && state->active.empty()) || state->exc) { - writeLine(to.get(), "exit"); - return; - } - if (!state->todo.empty()) { - attrPath = *state->todo.begin(); - state->todo.erase(state->todo.begin()); - state->active.insert(attrPath); - break; - } else - state.wait(wakeup); - } - - Activity act(*logger, lvlInfo, actUnknown, fmt("evaluating '%s'", attrPath)); - - /* Tell the worker to evaluate it. */ - writeLine(to.get(), "do " + attrPath); - - /* Wait for the response. */ - auto response = nlohmann::json::parse(readLine(from.get())); - - /* Handle the response. */ - StringSet newAttrs; - - if (response.find("job") != response.end()) { - auto state(state_.lock()); - if (json) - state->jobs[attrPath] = response["job"]; - else - std::cout << fmt("%d: %d\n", attrPath, (std::string) response["job"]["drvPath"]); - } - - if (response.find("attrs") != response.end()) { - for (auto & i : response["attrs"]) { - auto s = (attrPath.empty() ? "" : attrPath + ".") + (std::string) i; - newAttrs.insert(s); - } - } - - if (response.find("error") != response.end()) { - auto state(state_.lock()); - if (json) - state->jobs[attrPath]["error"] = response["error"]; - else - printError("error in job '%s': %s", - attrPath, (std::string) response["error"]); - } - - /* Add newly discovered job names to the queue. */ - { - auto state(state_.lock()); - state->active.erase(attrPath); - for (auto & s : newAttrs) - state->todo.insert(s); - wakeup.notify_all(); - } - } - } catch (...) { - auto state(state_.lock()); - state->exc = std::current_exception(); - wakeup.notify_all(); - } - }; - - std::vector<std::thread> threads; - for (size_t i = 0; i < nrWorkers; i++) - threads.emplace_back(std::thread(handler)); - - for (auto & thread : threads) - thread.join(); - - auto state(state_.lock()); - - if (state->exc) - std::rethrow_exception(state->exc); - - /* For aggregate jobs that have named consistuents - (i.e. constituents that are a job name rather than a - derivation), look up the referenced job and add it to the - dependencies of the aggregate derivation. */ - for (auto i = state->jobs.begin(); i != state->jobs.end(); ++i) { - auto jobName = i.key(); - auto & job = i.value(); - - auto named = job.find("namedConstituents"); - if (named == job.end()) continue; - - if (dryRun) { - for (std::string jobName2 : *named) { - auto job2 = state->jobs.find(jobName2); - if (job2 == state->jobs.end()) - throw Error("aggregate job '%s' references non-existent job '%s'", jobName, jobName2); - std::string drvPath2 = (*job2)["drvPath"]; - job["constituents"].push_back(drvPath2); - } - } else { - std::string drvPath = job["drvPath"]; - auto drv = readDerivation(*store, drvPath); - - for (std::string jobName2 : *named) { - auto job2 = state->jobs.find(jobName2); - if (job2 == state->jobs.end()) - throw Error("aggregate job '%s' references non-existent job '%s'", jobName, jobName2); - std::string drvPath2 = (*job2)["drvPath"]; - auto drv2 = readDerivation(*store, drvPath2); - job["constituents"].push_back(drvPath2); - drv.inputDrvs[store->parseStorePath(drvPath2)] = {drv2.outputs.begin()->first}; - } - - std::string drvName(store->parseStorePath(drvPath).name()); - assert(hasSuffix(drvName, drvExtension)); - drvName.resize(drvName.size() - drvExtension.size()); - auto h = hashDerivationModulo(*store, drv, true); - auto outPath = store->makeOutputPath("out", h, drvName); - drv.env["out"] = store->printStorePath(outPath); - drv.outputs.insert_or_assign("out", DerivationOutput(outPath.clone(), "", "")); - auto newDrvPath = store->printStorePath(writeDerivation(store, drv, drvName)); - - debug("rewrote aggregate derivation %s -> %s", drvPath, newDrvPath); - - job["drvPath"] = newDrvPath; - job["outputs"]["out"] = store->printStorePath(outPath); - } - - job.erase("namedConstituents"); - } - - if (json) std::cout << state->jobs.dump(2) << "\n"; - } -}; - -static auto r1 = registerCommand<CmdEvalHydraJobs>("eval-hydra-jobs"); |