forked from lix-project/lix
350 lines
13 KiB
C++
350 lines
13 KiB
C++
#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);
|
||
PathSet drvs;
|
||
for (auto & i : context)
|
||
if (i.at(0) == '!') {
|
||
size_t index = i.find("!", 1);
|
||
drvs.insert(string(i, index + 1));
|
||
}
|
||
job["constituents"] = concatStringsSep(" ", drvs);
|
||
}
|
||
|
||
/* 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
|
||
{
|
||
if (!gcRootsDir) warn("'--gc-roots-dir' not specified");
|
||
|
||
struct State
|
||
{
|
||
std::set<std::string> todo{""};
|
||
std::set<std::string> active;
|
||
nlohmann::json result;
|
||
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);
|
||
}
|
||
|
||
/* 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->result[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->result[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);
|
||
|
||
if (json) std::cout << state->result.dump(2) << "\n";
|
||
}
|
||
};
|
||
|
||
static auto r1 = registerCommand<CmdEvalHydraJobs>("eval-hydra-jobs");
|