forked from lix-project/hydra
291 lines
9.5 KiB
C++
291 lines
9.5 KiB
C++
#include <map>
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#include <iostream>
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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 "common-opts.hh"
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#include "globals.hh"
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using namespace nix;
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static Path gcRootsDir;
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typedef std::list<Value *, traceable_allocator<Value *> > ValueList;
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typedef std::map<Symbol, ValueList> AutoArgs;
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static void findJobs(EvalState & state, JSONObject & top,
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const AutoArgs & argsLeft, Value & v, const string & attrPath);
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static void tryJobAlts(EvalState & state, JSONObject & top,
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const AutoArgs & argsLeft, const string & attrPath, Value & fun,
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Formals::Formals_::iterator cur,
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Formals::Formals_::iterator last,
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Bindings & actualArgs) // FIXME: should be const
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{
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if (cur == last) {
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Value v, * arg = state.allocValue();
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state.mkAttrs(*arg, 0);
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arg->attrs = &actualArgs;
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mkApp(v, fun, *arg);
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findJobs(state, top, argsLeft, v, attrPath);
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return;
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}
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AutoArgs::const_iterator a = argsLeft.find(cur->name);
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Formals::Formals_::iterator next = cur; ++next;
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if (a == argsLeft.end()) {
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if (!cur->def)
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throw TypeError(format("job `%1%' requires an argument named `%2%'")
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% attrPath % cur->name);
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tryJobAlts(state, top, argsLeft, attrPath, fun, next, last, actualArgs);
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return;
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}
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int n = 0;
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for (auto & i : a->second) {
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Bindings & actualArgs2(*state.allocBindings(actualArgs.size() + 1)); // !!! inefficient
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for (auto & j : actualArgs)
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actualArgs2.push_back(j);
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AutoArgs argsLeft2(argsLeft);
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actualArgs2.push_back(Attr(cur->name, i));
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actualArgs2.sort(); // !!! inefficient
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argsLeft2.erase(cur->name);
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tryJobAlts(state, top, argsLeft2, attrPath, fun, next, last, actualArgs2);
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++n;
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}
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}
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static string queryMetaStrings(EvalState & state, DrvInfo & drv, const string & name)
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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("shortName"));
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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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const AutoArgs & argsLeft, Value & v, 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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state.forceValue(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"));
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res.attr("homepage", drv->queryMetaString("homepage"));
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res.attr("maintainers", queryMetaStrings(state, *drv, "maintainers"));
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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)
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findJobs(state, top, argsLeft, *i.value,
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(attrPath.empty() ? "" : attrPath + ".") + (string) i.name);
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}
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}
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}
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else if (v.type == tLambda && v.lambda.fun->matchAttrs) {
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Bindings & tmp(*state.allocBindings(0));
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tryJobAlts(state, top, argsLeft, attrPath, v,
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v.lambda.fun->formals->formals.begin(),
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v.lambda.fun->formals->formals.end(),
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tmp);
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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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const AutoArgs & argsLeft, Value & v, const string & attrPath)
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{
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try {
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findJobsWrapped(state, top, argsLeft, v, attrPath);
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} catch (EvalError & e) {
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{
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auto res = top.object(attrPath);
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res.attr("error", e.msg());
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}
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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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initNix();
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initGC();
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Strings searchPath;
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Path releaseExpr;
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std::map<string, Strings> autoArgs_;
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parseCmdLine(argc, argv, [&](Strings::iterator & arg, const Strings::iterator & end) {
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if (*arg == "--arg" || *arg == "--argstr") {
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/* This is like --arg in nix-instantiate, except that it
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supports multiple versions for the same argument.
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That is, autoArgs is a mapping from variable names to
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*lists* of values. */
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auto what = *arg;
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string name = getArg(what, arg, end);
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string value = getArg(what, arg, end);
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autoArgs_[name].push_back((what == "--arg" ? 'E' : 'S') + value);
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}
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else if (parseSearchPathArg(arg, end, searchPath))
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;
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else if (*arg == "--gc-roots-dir")
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gcRootsDir = getArg(*arg, arg, end);
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else if (*arg == "--dry-run")
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settings.readOnlyMode = true;
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else if (*arg != "" && arg->at(0) == '-')
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return false;
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else
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releaseExpr = absPath(*arg);
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return true;
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});
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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.useBuildHook = false;
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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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settings.set("restrict-eval", "true");
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if (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(searchPath, openStore());
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AutoArgs autoArgs;
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Value * inputsSet = state.allocValue();
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state.mkAttrs(*inputsSet, autoArgs_.size());
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for (auto & i : autoArgs_) {
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Symbol inputName = state.symbols.create(i.first);
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bool first = true;
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for (auto & j : i.second) {
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Value * v = state.allocValue();
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if (j[0] == 'E')
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state.eval(state.parseExprFromString(string(j, 1), absPath(".")), *v);
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else
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mkString(*v, string(j, 1));
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autoArgs[inputName].push_back(v);
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if (first) {
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inputsSet->attrs->push_back(Attr(inputName, v));
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first = false;
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}
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}
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}
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Symbol sInputs = state.symbols.create("inputs");
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if (autoArgs.find(sInputs) == autoArgs.end()) {
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inputsSet->attrs->sort();
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autoArgs[sInputs].push_back(inputsSet);
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}
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Value v;
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state.evalFile(releaseExpr, v);
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JSONObject json(std::cout, true);
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findJobs(state, json, autoArgs, v, "");
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state.printStats();
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});
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}
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