forked from lix-project/hydra
267 lines
8.6 KiB
C++
267 lines
8.6 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 "value-to-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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foreach (ValueList::const_iterator, i, a->second) {
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Bindings & actualArgs2(*state.allocBindings(actualArgs.size() + 1)); // !!! inefficient
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for (auto & i: actualArgs)
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actualArgs2.push_back(i);
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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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Value * v = drv.queryMeta(name);
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if (v) {
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state.forceValue(*v);
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if (v->type == tString)
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return v->string.s;
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else if (v->type == tList) {
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string res = "";
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for (unsigned int n = 0; n < v->list.length; ++n) {
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Value v2(*v->list.elems[n]);
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state.forceValue(v2);
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if (v2.type == tString) {
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if (res.size() != 0) res += ", ";
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res += v2.string.s;
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}
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}
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return res;
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}
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}
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return "";
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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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DrvInfo drv(state);
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if (getDerivation(state, v, drv, false)) {
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Path drvPath;
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DrvInfo::Outputs outputs = drv.queryOutputs();
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if (drv.system == "unknown")
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throw EvalError("derivation must have a ‘system’ attribute");
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top.attr(attrPath);
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JSONObject res(top.str);
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res.attr("nixName", drv.name);
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res.attr("system", drv.system);
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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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/* 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)) {
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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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foreach (PathSet::iterator, 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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if (gcRootsDir != "") {
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Path root = gcRootsDir + "/" + baseNameOf(drvPath);
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if (!pathExists(root)) addPermRoot(*store, drvPath, root, false);
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}
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res.attr("outputs");
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JSONObject res2(res.str);
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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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else {
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if (!state.isDerivation(v)) {
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foreach (Bindings::iterator, 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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top.attr(attrPath);
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JSONObject res(top.str);
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res.attr("error", e.msg());
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top.str << "\n";
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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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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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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);
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AutoArgs autoArgs;
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for (auto & i : autoArgs_) {
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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[state.symbols.create(i.first)].push_back(v);
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}
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}
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store = openStore();
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Value v;
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state.evalFile(releaseExpr, v);
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JSONObject json(std::cout);
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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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