268 lines
8.5 KiB
C++
268 lines
8.5 KiB
C++
#include <map>
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#include <iostream>
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#define GC_LINUX_THREADS 1
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#include <gc/gc_allocator.h>
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#include "shared.hh"
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#include "store-api.hh"
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#include "eval.hh"
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#include "eval-inline.hh"
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#include "util.hh"
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#include "json.hh"
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#include "get-drvs.hh"
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#include "globals.hh"
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#include "common-eval-args.hh"
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#include "flakeref.hh"
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#include "flake.hh"
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#include "hydra-config.hh"
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#include <sys/types.h>
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#include <sys/wait.h>
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using namespace nix;
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static Path gcRootsDir;
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static void findJobs(EvalState & state, JSONObject & top,
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Bindings & autoArgs, Value & v, const string & attrPath);
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static string queryMetaStrings(EvalState & state, DrvInfo & drv, const string & name, const string & subAttribute)
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{
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Strings res;
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std::function<void(Value & v)> rec;
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rec = [&](Value & v) {
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state.forceValue(v);
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if (v.type == tString)
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res.push_back(v.string.s);
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else if (v.isList())
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for (unsigned int n = 0; n < v.listSize(); ++n)
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rec(*v.listElems()[n]);
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else if (v.type == tAttrs) {
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auto a = v.attrs->find(state.symbols.create(subAttribute));
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if (a != v.attrs->end())
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res.push_back(state.forceString(*a->value));
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}
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};
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Value * v = drv.queryMeta(name);
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if (v) rec(*v);
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return concatStringsSep(", ", res);
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}
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static void findJobsWrapped(EvalState & state, JSONObject & top,
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Bindings & autoArgs, Value & vIn, const string & attrPath)
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{
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debug(format("at path `%1%'") % attrPath);
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checkInterrupt();
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Value v;
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state.autoCallFunction(autoArgs, vIn, v);
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if (v.type == tAttrs) {
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auto drv = getDerivation(state, v, false);
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if (drv) {
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Path drvPath;
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DrvInfo::Outputs outputs = drv->queryOutputs();
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if (drv->querySystem() == "unknown")
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throw EvalError("derivation must have a ‘system’ attribute");
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{
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auto res = top.object(attrPath);
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res.attr("nixName", drv->queryName());
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res.attr("system", drv->querySystem());
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res.attr("drvPath", drvPath = drv->queryDrvPath());
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res.attr("description", drv->queryMetaString("description"));
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res.attr("license", queryMetaStrings(state, *drv, "license", "shortName"));
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res.attr("homepage", drv->queryMetaString("homepage"));
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res.attr("maintainers", queryMetaStrings(state, *drv, "maintainers", "email"));
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res.attr("schedulingPriority", drv->queryMetaInt("schedulingPriority", 100));
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res.attr("timeout", drv->queryMetaInt("timeout", 36000));
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res.attr("maxSilent", drv->queryMetaInt("maxSilent", 7200));
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res.attr("isChannel", drv->queryMetaBool("isHydraChannel", false));
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/* If this is an aggregate, then get its constituents. */
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Bindings::iterator a = v.attrs->find(state.symbols.create("_hydraAggregate"));
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if (a != v.attrs->end() && state.forceBool(*a->value, *a->pos)) {
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Bindings::iterator a = v.attrs->find(state.symbols.create("constituents"));
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if (a == v.attrs->end())
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throw EvalError("derivation must have a ‘constituents’ attribute");
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PathSet context;
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state.coerceToString(*a->pos, *a->value, context, true, false);
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PathSet drvs;
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for (auto & i : context)
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if (i.at(0) == '!') {
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size_t index = i.find("!", 1);
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drvs.insert(string(i, index + 1));
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}
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res.attr("constituents", concatStringsSep(" ", drvs));
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}
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/* Register the derivation as a GC root. !!! This
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registers roots for jobs that we may have already
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done. */
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auto localStore = state.store.dynamic_pointer_cast<LocalFSStore>();
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if (gcRootsDir != "" && localStore) {
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Path root = gcRootsDir + "/" + baseNameOf(drvPath);
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if (!pathExists(root)) localStore->addPermRoot(drvPath, root, false);
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}
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auto res2 = res.object("outputs");
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for (auto & j : outputs)
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res2.attr(j.first, j.second);
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}
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}
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else {
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if (!state.isDerivation(v)) {
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for (auto & i : v.attrs->lexicographicOrder()) {
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std::string name(i->name);
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/* Skip jobs with dots in the name. */
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if (name.find('.') != std::string::npos) {
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printError("skipping job with illegal name '%s'", name);
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continue;
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}
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findJobs(state, top, autoArgs, *i->value,
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(attrPath.empty() ? "" : attrPath + ".") + name);
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}
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}
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}
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}
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else if (v.type == tNull) {
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// allow null values, meaning 'do nothing'
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}
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else
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throw TypeError(format("unsupported value: %1%") % v);
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}
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static void findJobs(EvalState & state, JSONObject & top,
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Bindings & autoArgs, Value & v, const string & attrPath)
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{
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try {
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findJobsWrapped(state, top, autoArgs, v, attrPath);
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} catch (EvalError & e) {
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auto res = top.object(attrPath);
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res.attr("error", filterANSIEscapes(e.msg(), true));
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}
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}
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int main(int argc, char * * argv)
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{
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/* Prevent undeclared dependencies in the evaluation via
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$NIX_PATH. */
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unsetenv("NIX_PATH");
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return handleExceptions(argv[0], [&]() {
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auto config = std::make_unique<::Config>();
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auto initialHeapSize = config->getStrOption("evaluator_initial_heap_size", "");
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if (initialHeapSize != "")
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setenv("GC_INITIAL_HEAP_SIZE", initialHeapSize.c_str(), 1);
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initNix();
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initGC();
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struct MyArgs : MixEvalArgs, MixCommonArgs
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{
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Path releaseExpr;
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bool flake = false;
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MyArgs() : MixCommonArgs("hydra-eval-jobs")
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{
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mkFlag()
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.longName("help")
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.description("show usage information")
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.handler([&]() {
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printHelp(programName, std::cout);
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throw Exit();
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});
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mkFlag()
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.longName("gc-roots-dir")
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.description("garbage collector roots directory")
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.labels({"path"})
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.dest(&gcRootsDir);
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mkFlag()
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.longName("dry-run")
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.description("don't create store derivations")
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.set(&settings.readOnlyMode, true);
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mkFlag()
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.longName("flake")
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.description("build a flake")
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.set(&flake, true);
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expectArg("expr", &releaseExpr);
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}
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};
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MyArgs myArgs;
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myArgs.parseCmdline(argvToStrings(argc, argv));
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JSONObject json(std::cout, true);
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std::cout.flush();
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/* FIXME: The build hook in conjunction with import-from-derivation is causing "unexpected EOF" during eval */
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settings.builders = "";
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/* Prevent access to paths outside of the Nix search path and
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to the environment. */
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evalSettings.restrictEval = true;
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/* When building a flake, use pure evaluation (no access to
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'getEnv', 'currentSystem' etc. */
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evalSettings.pureEval = myArgs.flake;
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if (myArgs.releaseExpr == "") throw UsageError("no expression specified");
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if (gcRootsDir == "") printMsg(lvlError, "warning: `--gc-roots-dir' not specified");
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EvalState state(myArgs.searchPath, openStore());
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Bindings & autoArgs = *myArgs.getAutoArgs(state);
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Value v;
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if (myArgs.flake) {
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FlakeRef flakeRef(myArgs.releaseExpr);
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auto vFlake = state.allocValue();
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makeFlakeValue(state, flakeRef, AllPure, *vFlake);
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auto vProvides = (*vFlake->attrs->get(state.symbols.create("provides")))->value;
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state.forceValue(*vProvides);
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auto aHydraJobs = vProvides->attrs->get(state.symbols.create("hydraJobs"));
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if (!aHydraJobs)
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throw Error("flake '%s' does not provide any Hydra jobs", flakeRef);
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v = *(*aHydraJobs)->value;
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} else {
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state.evalFile(lookupFileArg(state, myArgs.releaseExpr), v);
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}
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findJobs(state, json, autoArgs, v, "");
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});
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}
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