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Diffstat (limited to 'third_party/nix/src/libexpr/primops.cc')
| -rw-r--r-- | third_party/nix/src/libexpr/primops.cc | 2335 |
1 files changed, 0 insertions, 2335 deletions
diff --git a/third_party/nix/src/libexpr/primops.cc b/third_party/nix/src/libexpr/primops.cc deleted file mode 100644 index f196c5ed723c..000000000000 --- a/third_party/nix/src/libexpr/primops.cc +++ /dev/null @@ -1,2335 +0,0 @@ -#include "libexpr/primops.hh" - -#include <algorithm> -#include <cstring> -#include <iostream> -#include <regex> - -#include <absl/strings/str_split.h> -#include <glog/logging.h> -#include <sys/stat.h> -#include <sys/types.h> -#include <unistd.h> - -#include "libexpr/eval-inline.hh" -#include "libexpr/eval.hh" -#include "libexpr/json-to-value.hh" -#include "libexpr/names.hh" -#include "libexpr/value-to-json.hh" -#include "libexpr/value-to-xml.hh" -#include "libstore/derivations.hh" -#include "libstore/download.hh" -#include "libstore/globals.hh" -#include "libstore/store-api.hh" -#include "libutil/archive.hh" -#include "libutil/json.hh" -#include "libutil/status.hh" -#include "libutil/util.hh" - -namespace nix { - -/************************************************************* - * Miscellaneous - *************************************************************/ - -/* Decode a context string ‘!<name>!<path>’ into a pair <path, - name>. */ -std::pair<std::string, std::string> decodeContext(const std::string& s) { - if (s.at(0) == '!') { - size_t index = s.find('!', 1); - return std::pair<std::string, std::string>(std::string(s, index + 1), - std::string(s, 1, index - 1)); - } - return std::pair<std::string, std::string>( - s.at(0) == '/' ? s : std::string(s, 1), ""); -} - -InvalidPathError::InvalidPathError(const Path& path) - : EvalError(format("path '%1%' is not valid") % path), path(path) {} - -void EvalState::realiseContext(const PathSet& context) { - PathSet drvs; - - for (auto& i : context) { - std::pair<std::string, std::string> decoded = decodeContext(i); - Path ctx = decoded.first; - assert(store->isStorePath(ctx)); - if (!store->isValidPath(ctx)) { - throw InvalidPathError(ctx); - } - if (!decoded.second.empty() && nix::isDerivation(ctx)) { - drvs.insert(decoded.first + "!" + decoded.second); - - /* Add the output of this derivation to the allowed - paths. */ - if (allowedPaths) { - auto drv = store->derivationFromPath(decoded.first); - auto i = drv.outputs.find(decoded.second); - if (i == drv.outputs.end()) { - throw Error("derivation '%s' does not have an output named '%s'", - decoded.first, decoded.second); - } - allowedPaths->insert(i->second.path); - } - } - } - - if (drvs.empty()) { - return; - } - - if (!evalSettings.enableImportFromDerivation) { - throw EvalError(format("attempted to realize '%1%' during evaluation but " - "'allow-import-from-derivation' is false") % - *(drvs.begin())); - } - - /* For performance, prefetch all substitute info. */ - PathSet willBuild; - PathSet willSubstitute; - PathSet unknown; - unsigned long long downloadSize; - unsigned long long narSize; - store->queryMissing(drvs, willBuild, willSubstitute, unknown, downloadSize, - narSize); - - nix::util::OkOrThrow(store->buildPaths(std::cerr, drvs)); -} - -/* Load and evaluate an expression from path specified by the - argument. */ -static void prim_scopedImport(EvalState& state, const Pos& pos, Value** args, - Value& v) { - PathSet context; - Path path = state.coerceToPath(pos, *args[1], context); - - try { - state.realiseContext(context); - } catch (InvalidPathError& e) { - throw EvalError( - format("cannot import '%1%', since path '%2%' is not valid, at %3%") % - path % e.path % pos); - } - - Path realPath = state.checkSourcePath(state.toRealPath(path, context)); - - if (state.store->isStorePath(path) && state.store->isValidPath(path) && - isDerivation(path)) { - Derivation drv = readDerivation(realPath); - Value& w = *state.allocValue(); - state.mkAttrs(w, 3 + drv.outputs.size()); - Value* v2 = state.allocAttr(w, state.sDrvPath); - mkString(*v2, path, {"=" + path}); - v2 = state.allocAttr(w, state.sName); - mkString(*v2, drv.env["name"]); - Value* outputsVal = state.allocAttr(w, state.symbols.Create("outputs")); - state.mkList(*outputsVal, drv.outputs.size()); - unsigned int outputs_index = 0; - - for (const auto& o : drv.outputs) { - v2 = state.allocAttr(w, state.symbols.Create(o.first)); - mkString(*v2, o.second.path, {"!" + o.first + "!" + path}); - (*outputsVal->list)[outputs_index] = state.allocValue(); - mkString(*((*outputsVal->list)[outputs_index++]), o.first); - } - - Value fun; - state.evalFile( - settings.nixDataDir + "/nix/corepkgs/imported-drv-to-derivation.nix", - fun); - state.forceFunction(fun, pos); - mkApp(v, fun, w); - state.forceAttrs(v, pos); - } else { - state.forceAttrs(*args[0]); - if (args[0]->attrs->empty()) { - state.evalFile(realPath, v); - } else { - Env* env = &state.allocEnv(args[0]->attrs->size()); - env->up = &state.baseEnv; - - StaticEnv staticEnv(false, &state.staticBaseEnv); - - unsigned int displ = 0; - for (auto& attr : *args[0]->attrs) { - staticEnv.vars[attr.second.name] = displ; - env->values[displ++] = attr.second.value; - } - - DLOG(INFO) << "evaluating file '" << realPath << "'"; - Expr* e = state.parseExprFromFile(resolveExprPath(realPath), staticEnv); - - e->eval(state, *env, v); - } - } -} - -/* Return a string representing the type of the expression. */ -static void prim_typeOf(EvalState& state, const Pos& pos, Value** args, - Value& v) { - state.forceValue(*args[0]); - std::string t; - switch (args[0]->type) { - case tInt: - t = "int"; - break; - case tBool: - t = "bool"; - break; - case tString: - t = "string"; - break; - case tPath: - t = "path"; - break; - case tNull: - t = "null"; - break; - case tAttrs: - t = "set"; - break; - case tList: - t = "list"; - break; - case tLambda: - case tPrimOp: - case tPrimOpApp: - t = "lambda"; - break; - case tFloat: - t = "float"; - break; - default: - abort(); - } - mkString(v, state.symbols.Create(t)); -} - -/* Determine whether the argument is the null value. */ -static void prim_isNull(EvalState& state, const Pos& pos, Value** args, - Value& v) { - state.forceValue(*args[0]); - mkBool(v, args[0]->type == tNull); -} - -/* Determine whether the argument is a function. */ -static void prim_isFunction(EvalState& state, const Pos& pos, Value** args, - Value& v) { - state.forceValue(*args[0]); - bool res; - switch (args[0]->type) { - case tLambda: - case tPrimOp: - case tPrimOpApp: - res = true; - break; - default: - res = false; - break; - } - mkBool(v, res); -} - -/* Determine whether the argument is an integer. */ -static void prim_isInt(EvalState& state, const Pos& pos, Value** args, - Value& v) { - state.forceValue(*args[0]); - mkBool(v, args[0]->type == tInt); -} - -/* Determine whether the argument is a float. */ -static void prim_isFloat(EvalState& state, const Pos& pos, Value** args, - Value& v) { - state.forceValue(*args[0]); - mkBool(v, args[0]->type == tFloat); -} - -/* Determine whether the argument is a string. */ -static void prim_isString(EvalState& state, const Pos& pos, Value** args, - Value& v) { - state.forceValue(*args[0]); - mkBool(v, args[0]->type == tString); -} - -/* Determine whether the argument is a Boolean. */ -static void prim_isBool(EvalState& state, const Pos& pos, Value** args, - Value& v) { - state.forceValue(*args[0]); - mkBool(v, args[0]->type == tBool); -} - -/* Determine whether the argument is a path. */ -static void prim_isPath(EvalState& state, const Pos& pos, Value** args, - Value& v) { - state.forceValue(*args[0]); - mkBool(v, args[0]->type == tPath); -} - -struct CompareValues { - bool operator()(const Value* v1, const Value* v2) const { - if (v1->type == tFloat && v2->type == tInt) { - return v1->fpoint < v2->integer; - } - if (v1->type == tInt && v2->type == tFloat) { - return v1->integer < v2->fpoint; - } - if (v1->type != v2->type) { - throw EvalError(format("cannot compare %1% with %2%") % showType(*v1) % - showType(*v2)); - } - switch (v1->type) { - case tInt: - return v1->integer < v2->integer; - case tFloat: - return v1->fpoint < v2->fpoint; - case tString: - return strcmp(v1->string.s, v2->string.s) < 0; - case tPath: - return strcmp(v1->path, v2->path) < 0; - default: - throw EvalError(format("cannot compare %1% with %2%") % showType(*v1) % - showType(*v2)); - } - } -}; - -typedef std::list<Value*> ValueList; - -static void prim_genericClosure(EvalState& state, const Pos& pos, Value** args, - Value& v) { - state.forceAttrs(*args[0], pos); - - /* Get the start set. */ - Bindings::iterator startSet = - args[0]->attrs->find(state.symbols.Create("startSet")); - if (startSet == args[0]->attrs->end()) { - throw EvalError(format("attribute 'startSet' required, at %1%") % pos); - } - state.forceList(*startSet->second.value, pos); - - ValueList workSet; - for (Value* elem : *startSet->second.value->list) { - workSet.push_back(elem); - } - - /* Get the operator. */ - Bindings::iterator op = - args[0]->attrs->find(state.symbols.Create("operator")); - if (op == args[0]->attrs->end()) { - throw EvalError(format("attribute 'operator' required, at %1%") % pos); - } - state.forceValue(*op->second.value); - - /* Construct the closure by applying the operator to element of - `workSet', adding the result to `workSet', continuing until - no new elements are found. */ - ValueList res; - // `doneKeys' doesn't need to be a GC root, because its values are - // reachable from res. - std::set<Value*, CompareValues> doneKeys; - while (!workSet.empty()) { - Value* e = *(workSet.begin()); - workSet.pop_front(); - - state.forceAttrs(*e, pos); - - Bindings::iterator key = e->attrs->find(state.symbols.Create("key")); - if (key == e->attrs->end()) { - throw EvalError(format("attribute 'key' required, at %1%") % pos); - } - state.forceValue(*key->second.value); - - if (doneKeys.find(key->second.value) != doneKeys.end()) { - continue; - } - doneKeys.insert(key->second.value); - res.push_back(e); - - /* Call the `operator' function with `e' as argument. */ - Value call; - mkApp(call, *op->second.value, *e); - state.forceList(call, pos); - - /* Add the values returned by the operator to the work set. */ - for (unsigned int n = 0; n < call.listSize(); ++n) { - state.forceValue(*(*call.list)[n]); - workSet.push_back((*call.list)[n]); - } - } - - /* Create the result list. */ - state.mkList(v, res.size()); - unsigned int n = 0; - for (auto& i : res) { - (*v.list)[n++] = i; - } -} - -static void prim_abort(EvalState& state, const Pos& pos, Value** args, - Value& v) { - PathSet context; - std::string s = state.coerceToString(pos, *args[0], context); - throw Abort( - format("evaluation aborted with the following error message: '%1%'") % s); -} - -static void prim_throw(EvalState& state, const Pos& pos, Value** args, - Value& v) { - PathSet context; - std::string s = state.coerceToString(pos, *args[0], context); - throw ThrownError(s); -} - -static void prim_addErrorContext(EvalState& state, const Pos& pos, Value** args, - Value& v) { - try { - state.forceValue(*args[1]); - v = *args[1]; - } catch (Error& e) { - PathSet context; - e.addPrefix(format("%1%\n") % state.coerceToString(pos, *args[0], context)); - throw; - } -} - -/* Try evaluating the argument. Success => {success=true; value=something;}, - * else => {success=false; value=false;} */ -static void prim_tryEval(EvalState& state, const Pos& pos, Value** args, - Value& v) { - state.mkAttrs(v, 2); - try { - state.forceValue(*args[0]); - v.attrs->push_back(Attr(state.sValue, args[0])); - mkBool(*state.allocAttr(v, state.symbols.Create("success")), true); - } catch (AssertionError& e) { - mkBool(*state.allocAttr(v, state.sValue), false); - mkBool(*state.allocAttr(v, state.symbols.Create("success")), false); - } -} - -/* Return an environment variable. Use with care. */ -static void prim_getEnv(EvalState& state, const Pos& pos, Value** args, - Value& v) { - std::string name = state.forceStringNoCtx(*args[0], pos); - mkString(v, evalSettings.restrictEval || evalSettings.pureEval - ? "" - : getEnv(name).value_or("")); -} - -/* Evaluate the first argument, then return the second argument. */ -static void prim_seq(EvalState& state, const Pos& pos, Value** args, Value& v) { - state.forceValue(*args[0]); - state.forceValue(*args[1]); - v = *args[1]; -} - -/* Evaluate the first argument deeply (i.e. recursing into lists and - attrsets), then return the second argument. */ -static void prim_deepSeq(EvalState& state, const Pos& pos, Value** args, - Value& v) { - state.forceValueDeep(*args[0]); - state.forceValue(*args[1]); - v = *args[1]; -} - -/* Evaluate the first expression and print it on standard error. Then - return the second expression. Useful for debugging. */ -static void prim_trace(EvalState& state, const Pos& pos, Value** args, - Value& v) { - state.forceValue(*args[0]); - if (args[0]->type == tString) { - LOG(INFO) << "trace: " << args[0]->string.s; - } else { - LOG(INFO) << "trace: " << *args[0]; - } - state.forceValue(*args[1]); - v = *args[1]; -} - -void prim_valueSize(EvalState& state, const Pos& pos, Value** args, Value& v) { - /* We're not forcing the argument on purpose. */ - mkInt(v, valueSize(*args[0])); -} - -/************************************************************* - * Derivations - *************************************************************/ - -/* Construct (as a unobservable side effect) a Nix derivation - expression that performs the derivation described by the argument - set. Returns the original set extended with the following - attributes: `outPath' containing the primary output path of the - derivation; `drvPath' containing the path of the Nix expression; - and `type' set to `derivation' to indicate that this is a - derivation. */ -static void prim_derivationStrict(EvalState& state, const Pos& pos, - Value** args, Value& v) { - state.forceAttrs(*args[0], pos); - - /* Figure out the name first (for stack backtraces). */ - Bindings::iterator attr = args[0]->attrs->find(state.sName); - if (attr == args[0]->attrs->end()) { - throw EvalError(format("required attribute 'name' missing, at %1%") % pos); - } - std::string drvName; - Pos& posDrvName(*attr->second.pos); - try { - drvName = state.forceStringNoCtx(*attr->second.value, pos); - } catch (Error& e) { - e.addPrefix( - format("while evaluating the derivation attribute 'name' at %1%:\n") % - posDrvName); - throw; - } - - /* Check whether attributes should be passed as a JSON file. */ - std::ostringstream jsonBuf; - std::unique_ptr<JSONObject> jsonObject; - attr = args[0]->attrs->find(state.sStructuredAttrs); - if (attr != args[0]->attrs->end() && - state.forceBool(*attr->second.value, pos)) { - jsonObject = std::make_unique<JSONObject>(jsonBuf); - } - - /* Check whether null attributes should be ignored. */ - bool ignoreNulls = false; - attr = args[0]->attrs->find(state.sIgnoreNulls); - if (attr != args[0]->attrs->end()) { - ignoreNulls = state.forceBool(*attr->second.value, pos); - } - - /* Build the derivation expression by processing the attributes. */ - Derivation drv; - - PathSet context; - - std::optional<std::string> outputHash; - std::string outputHashAlgo; - bool outputHashRecursive = false; - - StringSet outputs; - outputs.insert("out"); - - for (auto& [_, i] : *args[0]->attrs) { - if (i.name == state.sIgnoreNulls) { - continue; - } - const std::string& key = i.name; - - auto handleHashMode = [&](const std::string& s) { - if (s == "recursive") { - outputHashRecursive = true; - } else if (s == "flat") { - outputHashRecursive = false; - } else { - throw EvalError( - "invalid value '%s' for 'outputHashMode' attribute, at %s", s, - posDrvName); - } - }; - - auto handleOutputs = [&](const Strings& ss) { - outputs.clear(); - for (auto& j : ss) { - if (outputs.find(j) != outputs.end()) { - throw EvalError(format("duplicate derivation output '%1%', at %2%") % - j % posDrvName); - } - /* !!! Check whether j is a valid attribute - name. */ - /* Derivations cannot be named ‘drv’, because - then we'd have an attribute ‘drvPath’ in - the resulting set. */ - if (j == "drv") { - throw EvalError( - format("invalid derivation output name 'drv', at %1%") % - posDrvName); - } - outputs.insert(j); - } - if (outputs.empty()) { - throw EvalError( - format("derivation cannot have an empty set of outputs, at %1%") % - posDrvName); - } - }; - - try { - if (ignoreNulls) { - state.forceValue(*i.value); - if (i.value->type == tNull) { - continue; - } - } - - /* The `args' attribute is special: it supplies the - command-line arguments to the builder. */ - if (i.name == state.sArgs) { - state.forceList(*i.value, pos); - for (unsigned int n = 0; n < i.value->listSize(); ++n) { - std::string s = state.coerceToString(posDrvName, *(*i.value->list)[n], - context, true); - drv.args.push_back(s); - } - } - - /* All other attributes are passed to the builder through - the environment. */ - else { - if (jsonObject) { - if (i.name == state.sStructuredAttrs) { - continue; - } - - auto placeholder(jsonObject->placeholder(key)); - printValueAsJSON(state, true, *i.value, placeholder, context); - - if (i.name == state.sBuilder) { - drv.builder = state.forceString(*i.value, context, posDrvName); - } else if (i.name == state.sSystem) { - drv.platform = state.forceStringNoCtx(*i.value, posDrvName); - } else if (i.name == state.sOutputHash) { - outputHash = state.forceStringNoCtx(*i.value, posDrvName); - } else if (i.name == state.sOutputHashAlgo) { - outputHashAlgo = state.forceStringNoCtx(*i.value, posDrvName); - } else if (i.name == state.sOutputHashMode) { - handleHashMode(state.forceStringNoCtx(*i.value, posDrvName)); - } else if (i.name == state.sOutputs) { - /* Require ‘outputs’ to be a list of strings. */ - state.forceList(*i.value, posDrvName); - Strings ss; - for (unsigned int n = 0; n < i.value->listSize(); ++n) { - ss.emplace_back( - state.forceStringNoCtx(*(*i.value->list)[n], posDrvName)); - } - handleOutputs(ss); - } - - } else { - auto s = state.coerceToString(posDrvName, *i.value, context, true); - drv.env.emplace(key, s); - if (i.name == state.sBuilder) { - drv.builder = s; - } else if (i.name == state.sSystem) { - drv.platform = s; - } else if (i.name == state.sOutputHash) { - outputHash = s; - } else if (i.name == state.sOutputHashAlgo) { - outputHashAlgo = s; - } else if (i.name == state.sOutputHashMode) { - handleHashMode(s); - } else if (i.name == state.sOutputs) { - handleOutputs(absl::StrSplit(s, absl::ByAnyChar(" \t\n\r"), - absl::SkipEmpty())); - } - } - } - - } catch (Error& e) { - e.addPrefix(format("while evaluating the attribute '%1%' of the " - "derivation '%2%' at %3%:\n") % - key % drvName % posDrvName); - throw; - } - } - - if (jsonObject) { - jsonObject.reset(); - drv.env.emplace("__json", jsonBuf.str()); - } - - /* Everything in the context of the strings in the derivation - attributes should be added as dependencies of the resulting - derivation. */ - for (auto& path : context) { - /* Paths marked with `=' denote that the path of a derivation - is explicitly passed to the builder. Since that allows the - builder to gain access to every path in the dependency - graph of the derivation (including all outputs), all paths - in the graph must be added to this derivation's list of - inputs to ensure that they are available when the builder - runs. */ - if (path.at(0) == '=') { - /* !!! This doesn't work if readOnlyMode is set. */ - PathSet refs; - state.store->computeFSClosure(std::string(path, 1), refs); - for (auto& j : refs) { - drv.inputSrcs.insert(j); - if (isDerivation(j)) { - drv.inputDrvs[j] = state.store->queryDerivationOutputNames(j); - } - } - } - - /* Handle derivation outputs of the form ‘!<name>!<path>’. */ - else if (path.at(0) == '!') { - std::pair<std::string, std::string> ctx = decodeContext(path); - drv.inputDrvs[ctx.first].insert(ctx.second); - } - - /* Otherwise it's a source file. */ - else { - drv.inputSrcs.insert(path); - } - } - - /* Do we have all required attributes? */ - if (drv.builder.empty()) { - throw EvalError(format("required attribute 'builder' missing, at %1%") % - posDrvName); - } - if (drv.platform.empty()) { - throw EvalError(format("required attribute 'system' missing, at %1%") % - posDrvName); - } - - /* Check whether the derivation name is valid. */ - checkStoreName(drvName); - if (isDerivation(drvName)) { - throw EvalError( - format("derivation names are not allowed to end in '%1%', at %2%") % - drvExtension % posDrvName); - } - - if (outputHash) { - /* Handle fixed-output derivations. */ - if (outputs.size() != 1 || *(outputs.begin()) != "out") { - throw Error(format("multiple outputs are not supported in fixed-output " - "derivations, at %1%") % - posDrvName); - } - - HashType ht = - outputHashAlgo.empty() ? htUnknown : parseHashType(outputHashAlgo); - auto hash_ = Hash::deserialize(*outputHash, ht); - auto h = Hash::unwrap_throw(hash_); - - Path outPath = - state.store->makeFixedOutputPath(outputHashRecursive, h, drvName); - if (!jsonObject) { - drv.env["out"] = outPath; - } - drv.outputs["out"] = DerivationOutput( - outPath, (outputHashRecursive ? "r:" : "") + printHashType(h.type), - h.to_string(Base16, false)); - } - - else { - /* Construct the "masked" store derivation, which is the final - one except that in the list of outputs, the output paths - are empty, and the corresponding environment variables have - an empty value. This ensures that changes in the set of - output names do get reflected in the hash. */ - for (auto& i : outputs) { - if (!jsonObject) { - drv.env[i] = ""; - } - drv.outputs[i] = DerivationOutput("", "", ""); - } - - /* Use the masked derivation expression to compute the output - path. */ - Hash h = hashDerivationModulo(*state.store, drv); - - for (auto& i : drv.outputs) { - if (i.second.path.empty()) { - Path outPath = state.store->makeOutputPath(i.first, h, drvName); - if (!jsonObject) { - drv.env[i.first] = outPath; - } - i.second.path = outPath; - } - } - } - - /* Write the resulting term into the Nix store directory. */ - Path drvPath = writeDerivation(state.store, drv, drvName, state.repair); - - VLOG(2) << "instantiated '" << drvName << "' -> '" << drvPath << "'"; - - /* Optimisation, but required in read-only mode! because in that - case we don't actually write store derivations, so we can't - read them later. */ - drvHashes[drvPath] = hashDerivationModulo(*state.store, drv); - - state.mkAttrs(v, 1 + drv.outputs.size()); - mkString(*state.allocAttr(v, state.sDrvPath), drvPath, {"=" + drvPath}); - for (auto& i : drv.outputs) { - mkString(*state.allocAttr(v, state.symbols.Create(i.first)), i.second.path, - {"!" + i.first + "!" + drvPath}); - } -} - -/* Return a placeholder string for the specified output that will be - substituted by the corresponding output path at build time. For - example, 'placeholder "out"' returns the string - /1rz4g4znpzjwh1xymhjpm42vipw92pr73vdgl6xs1hycac8kf2n9. At build - time, any occurence of this string in an derivation attribute will - be replaced with the concrete path in the Nix store of the output - ‘out’. */ -static void prim_placeholder(EvalState& state, const Pos& pos, Value** args, - Value& v) { - mkString(v, hashPlaceholder(state.forceStringNoCtx(*args[0], pos))); -} - -/************************************************************* - * Paths - *************************************************************/ - -/* Convert the argument to a path. !!! obsolete? */ -static void prim_toPath(EvalState& state, const Pos& pos, Value** args, - Value& v) { - PathSet context; - Path path = state.coerceToPath(pos, *args[0], context); - mkString(v, canonPath(path), context); -} - -/* Allow a valid store path to be used in an expression. This is - useful in some generated expressions such as in nix-push, which - generates a call to a function with an already existing store path - as argument. You don't want to use `toPath' here because it copies - the path to the Nix store, which yields a copy like - /nix/store/newhash-oldhash-oldname. In the past, `toPath' had - special case behaviour for store paths, but that created weird - corner cases. */ -static void prim_storePath(EvalState& state, const Pos& pos, Value** args, - Value& v) { - PathSet context; - Path path = state.checkSourcePath(state.coerceToPath(pos, *args[0], context)); - /* Resolve symlinks in ‘path’, unless ‘path’ itself is a symlink - directly in the store. The latter condition is necessary so - e.g. nix-push does the right thing. */ - if (!state.store->isStorePath(path)) { - path = canonPath(path, true); - } - if (!state.store->isInStore(path)) { - throw EvalError(format("path '%1%' is not in the Nix store, at %2%") % - path % pos); - } - Path path2 = state.store->toStorePath(path); - if (!settings.readOnlyMode) { - state.store->ensurePath(path2); - } - context.insert(path2); - mkString(v, path, context); -} - -static void prim_pathExists(EvalState& state, const Pos& pos, Value** args, - Value& v) { - PathSet context; - Path path = state.coerceToPath(pos, *args[0], context); - try { - state.realiseContext(context); - } catch (InvalidPathError& e) { - throw EvalError(format("cannot check the existence of '%1%', since path " - "'%2%' is not valid, at %3%") % - path % e.path % pos); - } - - try { - mkBool(v, pathExists(state.checkSourcePath(path))); - } catch (SysError& e) { - /* Don't give away info from errors while canonicalising - ‘path’ in restricted mode. */ - mkBool(v, false); - } catch (RestrictedPathError& e) { - mkBool(v, false); - } -} - -/* Return the base name of the given string, i.e., everything - following the last slash. */ -static void prim_baseNameOf(EvalState& state, const Pos& pos, Value** args, - Value& v) { - PathSet context; - mkString( - v, baseNameOf(state.coerceToString(pos, *args[0], context, false, false)), - context); -} - -/* Return the directory of the given path, i.e., everything before the - last slash. Return either a path or a string depending on the type - of the argument. */ -static void prim_dirOf(EvalState& state, const Pos& pos, Value** args, - Value& v) { - PathSet context; - Path dir = dirOf(state.coerceToString(pos, *args[0], context, false, false)); - if (args[0]->type == tPath) { - mkPath(v, dir.c_str()); - } else { - mkString(v, dir, context); - } -} - -/* Return the contents of a file as a string. */ -static void prim_readFile(EvalState& state, const Pos& pos, Value** args, - Value& v) { - PathSet context; - Path path = state.coerceToPath(pos, *args[0], context); - try { - state.realiseContext(context); - } catch (InvalidPathError& e) { - throw EvalError( - format("cannot read '%1%', since path '%2%' is not valid, at %3%") % - path % e.path % pos); - } - std::string s = - readFile(state.checkSourcePath(state.toRealPath(path, context))); - if (s.find(static_cast<char>(0)) != std::string::npos) { - throw Error(format("the contents of the file '%1%' cannot be represented " - "as a Nix string") % - path); - } - mkString(v, s.c_str()); -} - -/* Find a file in the Nix search path. Used to implement <x> paths, - which are desugared to 'findFile __nixPath "x"'. */ -static void prim_findFile(EvalState& state, const Pos& pos, Value** args, - Value& v) { - state.forceList(*args[0], pos); - - SearchPath searchPath; - - for (unsigned int n = 0; n < args[0]->listSize(); ++n) { - Value& v2(*(*args[0]->list)[n]); - state.forceAttrs(v2, pos); - - std::string prefix; - Bindings::iterator i = v2.attrs->find(state.symbols.Create("prefix")); - if (i != v2.attrs->end()) { - prefix = state.forceStringNoCtx(*i->second.value, pos); - } - - i = v2.attrs->find(state.symbols.Create("path")); - if (i == v2.attrs->end()) { - throw EvalError(format("attribute 'path' missing, at %1%") % pos); - } - - PathSet context; - std::string path = - state.coerceToString(pos, *i->second.value, context, false, false); - - try { - state.realiseContext(context); - } catch (InvalidPathError& e) { - throw EvalError( - format("cannot find '%1%', since path '%2%' is not valid, at %3%") % - path % e.path % pos); - } - - searchPath.emplace_back(prefix, path); - } - - std::string path = state.forceStringNoCtx(*args[1], pos); - - mkPath(v, - state.checkSourcePath(state.findFile(searchPath, path, pos)).c_str()); -} - -/* Return the cryptographic hash of a file in base-16. */ -static void prim_hashFile(EvalState& state, const Pos& pos, Value** args, - Value& v) { - std::string type = state.forceStringNoCtx(*args[0], pos); - HashType ht = parseHashType(type); - if (ht == htUnknown) { - throw Error(format("unknown hash type '%1%', at %2%") % type % pos); - } - - PathSet context; // discarded - Path p = state.coerceToPath(pos, *args[1], context); - - mkString(v, hashFile(ht, state.checkSourcePath(p)).to_string(Base16, false), - context); -} - -/* Read a directory (without . or ..) */ -static void prim_readDir(EvalState& state, const Pos& pos, Value** args, - Value& v) { - PathSet ctx; - Path path = state.coerceToPath(pos, *args[0], ctx); - try { - state.realiseContext(ctx); - } catch (InvalidPathError& e) { - throw EvalError( - format("cannot read '%1%', since path '%2%' is not valid, at %3%") % - path % e.path % pos); - } - - DirEntries entries = readDirectory(state.checkSourcePath(path)); - state.mkAttrs(v, entries.size()); - - for (auto& ent : entries) { - Value* ent_val = state.allocAttr(v, state.symbols.Create(ent.name)); - if (ent.type == DT_UNKNOWN) { - ent.type = getFileType(path + "/" + ent.name); - } - mkStringNoCopy(*ent_val, ent.type == DT_REG ? "regular" - : ent.type == DT_DIR ? "directory" - : ent.type == DT_LNK ? "symlink" - : "unknown"); - } -} - -/************************************************************* - * Creating files - *************************************************************/ - -/* Convert the argument (which can be any Nix expression) to an XML - representation returned in a string. Not all Nix expressions can - be sensibly or completely represented (e.g., functions). */ -static void prim_toXML(EvalState& state, const Pos& pos, Value** args, - Value& v) { - std::ostringstream out; - PathSet context; - printValueAsXML(state, true, false, *args[0], out, context); - mkString(v, out.str(), context); -} - -/* Convert the argument (which can be any Nix expression) to a JSON - string. Not all Nix expressions can be sensibly or completely - represented (e.g., functions). */ -static void prim_toJSON(EvalState& state, const Pos& pos, Value** args, - Value& v) { - std::ostringstream out; - PathSet context; - printValueAsJSON(state, true, *args[0], out, context); - mkString(v, out.str(), context); -} - -/* Parse a JSON string to a value. */ -static void prim_fromJSON(EvalState& state, const Pos& pos, Value** args, - Value& v) { - std::string s = state.forceStringNoCtx(*args[0], pos); - parseJSON(state, s, v); -} - -/* Store a string in the Nix store as a source file that can be used - as an input by derivations. */ -static void prim_toFile(EvalState& state, const Pos& pos, Value** args, - Value& v) { - PathSet context; - std::string name = state.forceStringNoCtx(*args[0], pos); - std::string contents = state.forceString(*args[1], context, pos); - - PathSet refs; - - for (auto path : context) { - if (path.at(0) != '/') { - throw EvalError(format("in 'toFile': the file '%1%' cannot refer to " - "derivation outputs, at %2%") % - name % pos); - } - refs.insert(path); - } - - Path storePath = - settings.readOnlyMode - ? state.store->computeStorePathForText(name, contents, refs) - : state.store->addTextToStore(name, contents, refs, state.repair); - - /* Note: we don't need to add `context' to the context of the - result, since `storePath' itself has references to the paths - used in args[1]. */ - - mkString(v, storePath, {storePath}); -} - -static void addPath(EvalState& state, const Pos& pos, const std::string& name, - const Path& path_, Value* filterFun, bool recursive, - const Hash& expectedHash, Value& v) { - const auto path = evalSettings.pureEval && expectedHash - ? path_ - : state.checkSourcePath(path_); - PathFilter filter = filterFun != nullptr ? ([&](const Path& path) { - auto st = lstat(path); - - /* Call the filter function. The first argument is the path, - the second is a string indicating the type of the file. */ - Value arg1; - mkString(arg1, path); - - Value fun2; - state.callFunction(*filterFun, arg1, fun2, noPos); - - Value arg2; - mkString(arg2, S_ISREG(st.st_mode) ? "regular" - : S_ISDIR(st.st_mode) ? "directory" - : S_ISLNK(st.st_mode) - ? "symlink" - : "unknown" /* not supported, will fail! */); - - Value res; - state.callFunction(fun2, arg2, res, noPos); - - return state.forceBool(res, pos); - }) - : defaultPathFilter; - - Path expectedStorePath; - if (expectedHash) { - expectedStorePath = - state.store->makeFixedOutputPath(recursive, expectedHash, name); - } - Path dstPath; - if (!expectedHash || !state.store->isValidPath(expectedStorePath)) { - dstPath = settings.readOnlyMode - ? state.store - ->computeStorePathForPath(name, path, recursive, - htSHA256, filter) - .first - : state.store->addToStore(name, path, recursive, htSHA256, - filter, state.repair); - if (expectedHash && expectedStorePath != dstPath) { - throw Error(format("store path mismatch in (possibly filtered) path " - "added from '%1%'") % - path); - } - } else { - dstPath = expectedStorePath; - } - - mkString(v, dstPath, {dstPath}); -} - -static void prim_filterSource(EvalState& state, const Pos& pos, Value** args, - Value& v) { - PathSet context; - Path path = state.coerceToPath(pos, *args[1], context); - if (!context.empty()) { - throw EvalError(format("string '%1%' cannot refer to other paths, at %2%") % - path % pos); - } - - state.forceValue(*args[0]); - if (args[0]->type != tLambda) { - throw TypeError(format("first argument in call to 'filterSource' is not a " - "function but %1%, at %2%") % - showType(*args[0]) % pos); - } - - addPath(state, pos, baseNameOf(path), path, args[0], true, Hash(), v); -} - -static void prim_path(EvalState& state, const Pos& pos, Value** args, - Value& v) { - state.forceAttrs(*args[0], pos); - Path path; - std::string name; - Value* filterFun = nullptr; - auto recursive = true; - Hash expectedHash; - - for (auto& attr : *args[0]->attrs) { - const std::string& n(attr.second.name); - if (n == "path") { - PathSet context; - path = state.coerceToPath(*attr.second.pos, *attr.second.value, context); - if (!context.empty()) { - throw EvalError( - format("string '%1%' cannot refer to other paths, at %2%") % path % - *attr.second.pos); - } - } else if (attr.second.name == state.sName) { - name = state.forceStringNoCtx(*attr.second.value, *attr.second.pos); - } else if (n == "filter") { - state.forceValue(*attr.second.value); - filterFun = attr.second.value; - } else if (n == "recursive") { - recursive = state.forceBool(*attr.second.value, *attr.second.pos); - } else if (n == "sha256") { - auto hash_ = Hash::deserialize( - state.forceStringNoCtx(*attr.second.value, *attr.second.pos), - htSHA256); - expectedHash = Hash::unwrap_throw(hash_); - } else { - throw EvalError( - format("unsupported argument '%1%' to 'addPath', at %2%") % - attr.second.name % *attr.second.pos); - } - } - if (path.empty()) { - throw EvalError(format("'path' required, at %1%") % pos); - } - if (name.empty()) { - name = baseNameOf(path); - } - - addPath(state, pos, name, path, filterFun, recursive, expectedHash, v); -} - -/************************************************************* - * Sets - *************************************************************/ - -/* Return the names of the attributes in a set as a sorted list of - strings. */ -static void prim_attrNames(EvalState& state, const Pos& pos, Value** args, - Value& v) { - state.forceAttrs(*args[0], pos); - - state.mkList(v, args[0]->attrs->size()); - - unsigned int n = 0; - for (auto& [key, value] : *args[0]->attrs) { - mkString(*((*v.list)[n++] = state.allocValue()), key); - } -} - -/* Return the values of the attributes in a set as a list, in the same - order as attrNames. */ -static void prim_attrValues(EvalState& state, const Pos& pos, Value** input, - Value& output) { - state.forceAttrs(*input[0], pos); - - state.mkList(output, input[0]->attrs->size()); - - unsigned int n = 0; - for (auto& [key, value] : *input[0]->attrs) { - (*output.list)[n++] = value.value; - } -} - -/* Dynamic version of the `.' operator. */ -void prim_getAttr(EvalState& state, const Pos& pos, Value** args, Value& v) { - std::string attr = state.forceStringNoCtx(*args[0], pos); - state.forceAttrs(*args[1], pos); - // !!! Should we create a symbol here or just do a lookup? - Bindings::iterator i = args[1]->attrs->find(state.symbols.Create(attr)); - if (i == args[1]->attrs->end()) { - throw EvalError(format("attribute '%1%' missing, at %2%") % attr % pos); - } - // !!! add to stack trace? - if (state.countCalls && (i->second.pos != nullptr)) { - state.attrSelects[*i->second.pos]++; - } - state.forceValue(*i->second.value); - v = *i->second.value; -} - -/* Return position information of the specified attribute. */ -void prim_unsafeGetAttrPos(EvalState& state, const Pos& pos, Value** args, - Value& v) { - std::string attr = state.forceStringNoCtx(*args[0], pos); - state.forceAttrs(*args[1], pos); - Bindings::iterator i = args[1]->attrs->find(state.symbols.Create(attr)); - if (i == args[1]->attrs->end()) { - mkNull(v); - } else { - state.mkPos(v, i->second.pos); - } -} - -/* Dynamic version of the `?' operator. */ -static void prim_hasAttr(EvalState& state, const Pos& pos, Value** args, - Value& v) { - std::string attr = state.forceStringNoCtx(*args[0], pos); - state.forceAttrs(*args[1], pos); - mkBool(v, args[1]->attrs->find(state.symbols.Create(attr)) != - args[1]->attrs->end()); -} - -/* Determine whether the argument is a set. */ -static void prim_isAttrs(EvalState& state, const Pos& pos, Value** args, - Value& v) { - state.forceValue(*args[0]); - mkBool(v, args[0]->type == tAttrs); -} - -static void prim_removeAttrs(EvalState& state, const Pos& pos, Value** args, - Value& v) { - state.forceAttrs(*args[0], pos); - state.forceList(*args[1], pos); - - /* Get the attribute names to be removed. */ - std::set<Symbol> names; - for (unsigned int i = 0; i < args[1]->listSize(); ++i) { - state.forceStringNoCtx(*(*args[1]->list)[i], pos); - names.insert(state.symbols.Create((*args[1]->list)[i]->string.s)); - } - - /* Copy all attributes not in that set. Note that we don't need - to sort v.attrs because it's a subset of an already sorted - vector. */ - state.mkAttrs(v, args[0]->attrs->size()); - for (auto& i : *args[0]->attrs) { - if (names.find(i.second.name) == names.end()) { - v.attrs->push_back(i.second); - } - } -} - -/* Builds a set from a list specifying (name, value) pairs. To be - precise, a list [{name = "name1"; value = value1;} ... {name = - "nameN"; value = valueN;}] is transformed to {name1 = value1; - ... nameN = valueN;}. In case of duplicate occurences of the same - name, the first takes precedence. */ -static void prim_listToAttrs(EvalState& state, const Pos& pos, Value** args, - Value& v) { - state.forceList(*args[0], pos); - - state.mkAttrs(v, args[0]->listSize()); - - std::set<Symbol> seen; - - for (unsigned int i = 0; i < args[0]->listSize(); ++i) { - Value& v2(*(*args[0]->list)[i]); - state.forceAttrs(v2, pos); - - Bindings::iterator j = v2.attrs->find(state.sName); - if (j == v2.attrs->end()) { - throw TypeError( - format( - "'name' attribute missing in a call to 'listToAttrs', at %1%") % - pos); - } - std::string name = state.forceStringNoCtx(*j->second.value, pos); - - Symbol sym = state.symbols.Create(name); - if (seen.find(sym) == seen.end()) { - Bindings::iterator j2 = - // TODO(tazjin): this line used to construct the symbol again: - // state.symbols.Create(state.sValue)); - // Why? - v2.attrs->find(state.sValue); - if (j2 == v2.attrs->end()) { - throw TypeError(format("'value' attribute missing in a call to " - "'listToAttrs', at %1%") % - pos); - } - - v.attrs->push_back(Attr(sym, j2->second.value, j2->second.pos)); - seen.insert(sym); - } - } -} - -/* Return the right-biased intersection of two sets as1 and as2, - i.e. a set that contains every attribute from as2 that is also a - member of as1. */ -static void prim_intersectAttrs(EvalState& state, const Pos& pos, Value** args, - Value& v) { - state.forceAttrs(*args[0], pos); - state.forceAttrs(*args[1], pos); - - state.mkAttrs(v, std::min(args[0]->attrs->size(), args[1]->attrs->size())); - - for (auto& i : *args[0]->attrs) { - Bindings::iterator j = args[1]->attrs->find(i.second.name); - if (j != args[1]->attrs->end()) { - v.attrs->push_back(j->second); - } - } -} - -/* Collect each attribute named `attr' from a list of attribute sets. - Sets that don't contain the named attribute are ignored. - - Example: - catAttrs "a" [{a = 1;} {b = 0;} {a = 2;}] - => [1 2] -*/ -static void prim_catAttrs(EvalState& state, const Pos& pos, Value** args, - Value& v) { - Symbol attrName = state.symbols.Create(state.forceStringNoCtx(*args[0], pos)); - state.forceList(*args[1], pos); - - Value* res[args[1]->listSize()]; - unsigned int found = 0; - - for (unsigned int n = 0; n < args[1]->listSize(); ++n) { - Value& v2(*(*args[1]->list)[n]); - state.forceAttrs(v2, pos); - Bindings::iterator i = v2.attrs->find(attrName); - if (i != v2.attrs->end()) { - res[found++] = i->second.value; - } - } - - state.mkList(v, found); - for (unsigned int n = 0; n < found; ++n) { - (*v.list)[n] = res[n]; - } -} - -/* Return a set containing the names of the formal arguments expected - by the function `f'. The value of each attribute is a Boolean - denoting whether the corresponding argument has a default value. For - instance, - - functionArgs ({ x, y ? 123}: ...) - => { x = false; y = true; } - - "Formal argument" here refers to the attributes pattern-matched by - the function. Plain lambdas are not included, e.g. - - functionArgs (x: ...) - => { } -*/ -static void prim_functionArgs(EvalState& state, const Pos& pos, Value** args, - Value& v) { - state.forceValue(*args[0]); - if (args[0]->type == tPrimOpApp || args[0]->type == tPrimOp) { - state.mkAttrs(v, 0); - return; - } - if (args[0]->type != tLambda) { - throw TypeError(format("'functionArgs' requires a function, at %1%") % pos); - } - - if (!args[0]->lambda.fun->matchAttrs) { - state.mkAttrs(v, 0); - return; - } - - state.mkAttrs(v, args[0]->lambda.fun->formals->formals.size()); - for (auto& i : args[0]->lambda.fun->formals->formals) { - // !!! should optimise booleans (allocate only once) - // TODO(tazjin): figure out what the above comment means - mkBool(*state.allocAttr(v, i.name), i.def != nullptr); - } -} - -/* Apply a function to every element of an attribute set. */ -static void prim_mapAttrs(EvalState& state, const Pos& pos, Value** args, - Value& v) { - state.forceAttrs(*args[1], pos); - - state.mkAttrs(v, args[1]->attrs->size()); - - for (auto& i : *args[1]->attrs) { - Value* vName = state.allocValue(); - Value* vFun2 = state.allocValue(); - mkString(*vName, i.second.name); - mkApp(*vFun2, *args[0], *vName); - mkApp(*state.allocAttr(v, i.second.name), *vFun2, *i.second.value); - } -} - -/************************************************************* - * Lists - *************************************************************/ - -/* Determine whether the argument is a list. */ -static void prim_isList(EvalState& state, const Pos& pos, Value** args, - Value& v) { - state.forceValue(*args[0]); - mkBool(v, args[0]->isList()); -} - -static void elemAt(EvalState& state, const Pos& pos, Value& list, int n, - Value& v) { - state.forceList(list, pos); - if (n < 0 || static_cast<unsigned int>(n) >= list.listSize()) { - throw Error(format("list index %1% is out of bounds, at %2%") % n % pos); - } - state.forceValue(*(*list.list)[n]); - v = *(*list.list)[n]; -} - -/* Return the n-1'th element of a list. */ -static void prim_elemAt(EvalState& state, const Pos& pos, Value** args, - Value& v) { - elemAt(state, pos, *args[0], state.forceInt(*args[1], pos), v); -} - -/* Return the first element of a list. */ -static void prim_head(EvalState& state, const Pos& pos, Value** args, - Value& v) { - elemAt(state, pos, *args[0], 0, v); -} - -/* Return a list consisting of everything but the first element of - a list. Warning: this function takes O(n) time, so you probably - don't want to use it! */ -static void prim_tail(EvalState& state, const Pos& pos, Value** args, - Value& v) { - state.forceList(*args[0], pos); - if (args[0]->listSize() == 0) { - throw Error(format("'tail' called on an empty list, at %1%") % pos); - } - state.mkList(v, args[0]->listSize() - 1); - for (unsigned int n = 0; n < v.listSize(); ++n) { - (*v.list)[n] = (*args[0]->list)[n + 1]; - } -} - -/* Apply a function to every element of a list. */ -static void prim_map(EvalState& state, const Pos& pos, Value** args, Value& v) { - state.forceList(*args[1], pos); - - state.mkList(v, args[1]->listSize()); - - for (unsigned int n = 0; n < v.listSize(); ++n) { - mkApp(*((*v.list)[n] = state.allocValue()), *args[0], *(*args[1]->list)[n]); - } -} - -/* Filter a list using a predicate; that is, return a list containing - every element from the list for which the predicate function - returns true. */ -static void prim_filter(EvalState& state, const Pos& pos, Value** args, - Value& v) { - state.forceFunction(*args[0], pos); - state.forceList(*args[1], pos); - - // FIXME: putting this on the stack is risky. - Value* vs[args[1]->listSize()]; - unsigned int k = 0; - - bool same = true; - for (unsigned int n = 0; n < args[1]->listSize(); ++n) { - Value res; - state.callFunction(*args[0], *(*args[1]->list)[n], res, noPos); - if (state.forceBool(res, pos)) { - vs[k++] = (*args[1]->list)[n]; - } else { - same = false; - } - } - - if (same) { - v = *args[1]; - } else { - state.mkList(v, k); - for (unsigned int n = 0; n < k; ++n) { - (*v.list)[n] = vs[n]; - } - } -} - -/* Return true if a list contains a given element. */ -static void prim_elem(EvalState& state, const Pos& pos, Value** args, - Value& v) { - bool res = false; - state.forceList(*args[1], pos); - for (unsigned int n = 0; n < args[1]->listSize(); ++n) { - if (state.eqValues(*args[0], *(*args[1]->list)[n])) { - res = true; - break; - } - } - mkBool(v, res); -} - -/* Concatenate a list of lists. */ -static void prim_concatLists(EvalState& state, const Pos& pos, Value** args, - Value& v) { - state.forceList(*args[0], pos); - state.concatLists(v, *args[0]->list, pos); -} - -/* Return the length of a list. This is an O(1) time operation. */ -static void prim_length(EvalState& state, const Pos& pos, Value** args, - Value& v) { - state.forceList(*args[0], pos); - mkInt(v, args[0]->listSize()); -} - -/* Reduce a list by applying a binary operator, from left to - right. The operator is applied strictly. */ -static void prim_foldlStrict(EvalState& state, const Pos& pos, Value** args, - Value& v) { - state.forceFunction(*args[0], pos); - state.forceList(*args[2], pos); - - if (args[2]->listSize() != 0u) { - Value* vCur = args[1]; - - for (unsigned int n = 0; n < args[2]->listSize(); ++n) { - Value vTmp; - state.callFunction(*args[0], *vCur, vTmp, pos); - vCur = n == args[2]->listSize() - 1 ? &v : state.allocValue(); - state.callFunction(vTmp, *(*args[2]->list)[n], *vCur, pos); - } - state.forceValue(v); - } else { - state.forceValue(*args[1]); - v = *args[1]; - } -} - -static void anyOrAll(bool any, EvalState& state, const Pos& pos, Value** args, - Value& v) { - state.forceFunction(*args[0], pos); - state.forceList(*args[1], pos); - - Value vTmp; - for (unsigned int n = 0; n < args[1]->listSize(); ++n) { - state.callFunction(*args[0], *(*args[1]->list)[n], vTmp, pos); - bool res = state.forceBool(vTmp, pos); - if (res == any) { - mkBool(v, any); - return; - } - } - - mkBool(v, !any); -} - -static void prim_any(EvalState& state, const Pos& pos, Value** args, Value& v) { - anyOrAll(true, state, pos, args, v); -} - -static void prim_all(EvalState& state, const Pos& pos, Value** args, Value& v) { - anyOrAll(false, state, pos, args, v); -} - -static void prim_genList(EvalState& state, const Pos& pos, Value** args, - Value& v) { - auto len = state.forceInt(*args[1], pos); - - if (len < 0) { - throw EvalError(format("cannot create list of size %1%, at %2%") % len % - pos); - } - - state.mkList(v, len); - - for (unsigned int n = 0; n < static_cast<unsigned int>(len); ++n) { - Value* arg = state.allocValue(); - mkInt(*arg, n); - mkApp(*((*v.list)[n] = state.allocValue()), *args[0], *arg); - } -} - -static void prim_lessThan(EvalState& state, const Pos& pos, Value** args, - Value& v); - -static void prim_sort(EvalState& state, const Pos& pos, Value** args, - Value& v) { - state.forceFunction(*args[0], pos); - state.forceList(*args[1], pos); - - // Copy of the input list which can be sorted in place. - v.type = tList; - v.list = std::make_shared<NixList>(*args[1]->list); - - std::for_each(v.list->begin(), v.list->end(), - [&](Value* val) { state.forceValue(*val); }); - - auto comparator = [&](Value* a, Value* b) { - /* Optimization: if the comparator is lessThan, bypass - callFunction. */ - if (args[0]->type == tPrimOp && args[0]->primOp->fun == prim_lessThan) { - return CompareValues()(a, b); - } - - Value vTmp1{}; - Value vTmp2{}; - state.callFunction(*args[0], *a, vTmp1, pos); - state.callFunction(vTmp1, *b, vTmp2, pos); - return state.forceBool(vTmp2, pos); - }; - - /* FIXME: std::sort can segfault if the comparator is not a strict - weak ordering. What to do? std::stable_sort() seems more - resilient, but no guarantees... */ - std::stable_sort(v.list->begin(), v.list->end(), comparator); -} - -static void prim_partition(EvalState& state, const Pos& pos, Value** args, - Value& v) { - state.forceFunction(*args[0], pos); - state.forceList(*args[1], pos); - - std::shared_ptr<NixList> right = std::make_shared<NixList>(); - std::shared_ptr<NixList> wrong = std::make_shared<NixList>(); - - for (Value* elem : *args[1]->list) { - state.forceValue(*elem, pos); - - Value res; - state.callFunction(*args[0], *elem, res, pos); - if (state.forceBool(res, pos)) { - right->push_back(elem); - } else { - wrong->push_back(elem); - } - } - - state.mkAttrs(v, 2); - - Value* vRight = state.allocAttr(v, state.sRight); - state.mkList(*vRight, right); - - Value* vWrong = state.allocAttr(v, state.sWrong); - state.mkList(*vWrong, wrong); -} - -/* concatMap = f: list: concatLists (map f list); */ -/* C++-version is to avoid allocating `mkApp', call `f' eagerly */ -static void prim_concatMap(EvalState& state, const Pos& pos, Value** args, - Value& v) { - state.forceFunction(*args[0], pos); - state.forceList(*args[1], pos); - - std::shared_ptr<NixList> outlist = std::make_shared<NixList>(); - - for (Value* elem : *args[1]->list) { - auto out = state.allocValue(); - state.callFunction(*args[0], *elem, *out, pos); - state.forceList(*out, pos); - - outlist->insert(outlist->end(), out->list->begin(), out->list->end()); - } - - state.mkList(v, outlist); -} - -/************************************************************* - * Integer arithmetic - *************************************************************/ - -static void prim_add(EvalState& state, const Pos& pos, Value** args, Value& v) { - state.forceValue(*args[0], pos); - state.forceValue(*args[1], pos); - if (args[0]->type == tFloat || args[1]->type == tFloat) { - mkFloat(v, - state.forceFloat(*args[0], pos) + state.forceFloat(*args[1], pos)); - } else { - mkInt(v, state.forceInt(*args[0], pos) + state.forceInt(*args[1], pos)); - } -} - -static void prim_sub(EvalState& state, const Pos& pos, Value** args, Value& v) { - state.forceValue(*args[0], pos); - state.forceValue(*args[1], pos); - if (args[0]->type == tFloat || args[1]->type == tFloat) { - mkFloat(v, - state.forceFloat(*args[0], pos) - state.forceFloat(*args[1], pos)); - } else { - mkInt(v, state.forceInt(*args[0], pos) - state.forceInt(*args[1], pos)); - } -} - -static void prim_mul(EvalState& state, const Pos& pos, Value** args, Value& v) { - state.forceValue(*args[0], pos); - state.forceValue(*args[1], pos); - if (args[0]->type == tFloat || args[1]->type == tFloat) { - mkFloat(v, - state.forceFloat(*args[0], pos) * state.forceFloat(*args[1], pos)); - } else { - mkInt(v, state.forceInt(*args[0], pos) * state.forceInt(*args[1], pos)); - } -} - -static void prim_div(EvalState& state, const Pos& pos, Value** args, Value& v) { - state.forceValue(*args[0], pos); - state.forceValue(*args[1], pos); - - NixFloat f2 = state.forceFloat(*args[1], pos); - if (f2 == 0) { - throw EvalError(format("division by zero, at %1%") % pos); - } - - if (args[0]->type == tFloat || args[1]->type == tFloat) { - mkFloat(v, - state.forceFloat(*args[0], pos) / state.forceFloat(*args[1], pos)); - } else { - NixInt i1 = state.forceInt(*args[0], pos); - NixInt i2 = state.forceInt(*args[1], pos); - /* Avoid division overflow as it might raise SIGFPE. */ - if (i1 == std::numeric_limits<NixInt>::min() && i2 == -1) { - throw EvalError(format("overflow in integer division, at %1%") % pos); - } - mkInt(v, i1 / i2); - } -} - -static void prim_bitAnd(EvalState& state, const Pos& pos, Value** args, - Value& v) { - mkInt(v, state.forceInt(*args[0], pos) & state.forceInt(*args[1], pos)); -} - -static void prim_bitOr(EvalState& state, const Pos& pos, Value** args, - Value& v) { - mkInt(v, state.forceInt(*args[0], pos) | state.forceInt(*args[1], pos)); -} - -static void prim_bitXor(EvalState& state, const Pos& pos, Value** args, - Value& v) { - mkInt(v, state.forceInt(*args[0], pos) ^ state.forceInt(*args[1], pos)); -} - -static void prim_lessThan(EvalState& state, const Pos& pos, Value** args, - Value& v) { - state.forceValue(*args[0]); - state.forceValue(*args[1]); - CompareValues comp; - mkBool(v, comp(args[0], args[1])); -} - -/************************************************************* - * String manipulation - *************************************************************/ - -/* Convert the argument to a string. Paths are *not* copied to the - store, so `toString /foo/bar' yields `"/foo/bar"', not - `"/nix/store/whatever..."'. */ -static void prim_toString(EvalState& state, const Pos& pos, Value** args, - Value& v) { - PathSet context; - std::string s = state.coerceToString(pos, *args[0], context, true, false); - mkString(v, s, context); -} - -/* `substring start len str' returns the substring of `str' starting - at character position `min(start, stringLength str)' inclusive and - ending at `min(start + len, stringLength str)'. `start' must be - non-negative. */ -static void prim_substring(EvalState& state, const Pos& pos, Value** args, - Value& v) { - int start = state.forceInt(*args[0], pos); - int len = state.forceInt(*args[1], pos); - PathSet context; - std::string s = state.coerceToString(pos, *args[2], context); - - if (start < 0) { - throw EvalError(format("negative start position in 'substring', at %1%") % - pos); - } - - mkString(v, - static_cast<unsigned int>(start) >= s.size() - ? "" - : std::string(s, start, len), - context); -} - -static void prim_stringLength(EvalState& state, const Pos& pos, Value** args, - Value& v) { - PathSet context; - std::string s = state.coerceToString(pos, *args[0], context); - mkInt(v, s.size()); -} - -/* Return the cryptographic hash of a string in base-16. */ -static void prim_hashString(EvalState& state, const Pos& pos, Value** args, - Value& v) { - std::string type = state.forceStringNoCtx(*args[0], pos); - HashType ht = parseHashType(type); - if (ht == htUnknown) { - throw Error(format("unknown hash type '%1%', at %2%") % type % pos); - } - - PathSet context; // discarded - std::string s = state.forceString(*args[1], context, pos); - - mkString(v, hashString(ht, s).to_string(Base16, false), context); -} - -/* Match a regular expression against a string and return either - ‘null’ or a list containing substring matches. */ -static void prim_match(EvalState& state, const Pos& pos, Value** args, - Value& v) { - auto re = state.forceStringNoCtx(*args[0], pos); - - try { - std::regex regex(re, std::regex::extended); - - PathSet context; - const std::string str = state.forceString(*args[1], context, pos); - - std::smatch match; - if (!std::regex_match(str, match, regex)) { - mkNull(v); - return; - } - - // the first match is the whole string - const size_t len = match.size() - 1; - state.mkList(v, len); - for (size_t i = 0; i < len; ++i) { - if (!match[i + 1].matched) { - mkNull(*((*v.list)[i] = state.allocValue())); - } else { - mkString(*((*v.list)[i] = state.allocValue()), - match[i + 1].str().c_str()); - } - } - - } catch (std::regex_error& e) { - if (e.code() == std::regex_constants::error_space) { - // limit is _GLIBCXX_REGEX_STATE_LIMIT for libstdc++ - throw EvalError("memory limit exceeded by regular expression '%s', at %s", - re, pos); - } - throw EvalError("invalid regular expression '%s', at %s", re, pos); - } -} - -/* Split a std::string with a regular expression, and return a list of the - non-matching parts interleaved by the lists of the matching groups. */ -static void prim_split(EvalState& state, const Pos& pos, Value** args, - Value& v) { - auto re = state.forceStringNoCtx(*args[0], pos); - - try { - std::regex regex(re, std::regex::extended); - - PathSet context; - const std::string str = state.forceString(*args[1], context, pos); - - auto begin = std::sregex_iterator(str.begin(), str.end(), regex); - auto end = std::sregex_iterator(); - - // Any matches results are surrounded by non-matching results. - const size_t len = std::distance(begin, end); - state.mkList(v, 2 * len + 1); - size_t idx = 0; - Value* elem; - - if (len == 0) { - (*v.list)[idx++] = args[1]; - return; - } - - for (std::sregex_iterator i = begin; i != end; ++i) { - assert(idx <= 2 * len + 1 - 3); - std::smatch match = *i; - - // Add a string for non-matched characters. - elem = (*v.list)[idx++] = state.allocValue(); - mkString(*elem, match.prefix().str().c_str()); - - // Add a list for matched substrings. - const size_t slen = match.size() - 1; - elem = (*v.list)[idx++] = state.allocValue(); - - // Start at 1, beacause the first match is the whole string. - state.mkList(*elem, slen); - for (size_t si = 0; si < slen; ++si) { - if (!match[si + 1].matched) { - mkNull(*((*elem->list)[si] = state.allocValue())); - } else { - mkString(*((*elem->list)[si] = state.allocValue()), - match[si + 1].str().c_str()); - } - } - - // Add a string for non-matched suffix characters. - if (idx == 2 * len) { - elem = (*v.list)[idx++] = state.allocValue(); - mkString(*elem, match.suffix().str().c_str()); - } - } - assert(idx == 2 * len + 1); - - } catch (std::regex_error& e) { - if (e.code() == std::regex_constants::error_space) { - // limit is _GLIBCXX_REGEX_STATE_LIMIT for libstdc++ - throw EvalError("memory limit exceeded by regular expression '%s', at %s", - re, pos); - } - throw EvalError("invalid regular expression '%s', at %s", re, pos); - } -} - -static void prim_concatStringSep(EvalState& state, const Pos& pos, Value** args, - Value& v) { - PathSet context; - - auto sep = state.forceString(*args[0], context, pos); - state.forceList(*args[1], pos); - - std::string res; - res.reserve((args[1]->listSize() + 32) * sep.size()); - bool first = true; - - for (unsigned int n = 0; n < args[1]->listSize(); ++n) { - if (first) { - first = false; - } else { - res += sep; - } - - res += state.coerceToString(pos, *(*args[1]->list)[n], context); - } - - mkString(v, res, context); -} - -static void prim_replaceStrings(EvalState& state, const Pos& pos, Value** args, - Value& v) { - state.forceList(*args[0], pos); - state.forceList(*args[1], pos); - if (args[0]->listSize() != args[1]->listSize()) { - throw EvalError(format("'from' and 'to' arguments to 'replaceStrings' have " - "different lengths, at %1%") % - pos); - } - - std::vector<std::string> from; - from.reserve(args[0]->listSize()); - for (unsigned int n = 0; n < args[0]->listSize(); ++n) { - from.push_back(state.forceString(*(*args[0]->list)[n], pos)); - } - - std::vector<std::pair<std::string, PathSet>> to; - to.reserve(args[1]->listSize()); - for (unsigned int n = 0; n < args[1]->listSize(); ++n) { - PathSet ctx; - auto s = state.forceString(*(*args[1]->list)[n], ctx, pos); - to.emplace_back(std::move(s), std::move(ctx)); - } - - PathSet context; - auto s = state.forceString(*args[2], context, pos); - - std::string res; - // Loops one past last character to handle the case where 'from' contains an - // empty string. - for (size_t p = 0; p <= s.size();) { - bool found = false; - auto i = from.begin(); - auto j = to.begin(); - for (; i != from.end(); ++i, ++j) { - if (s.compare(p, i->size(), *i) == 0) { - found = true; - res += j->first; - if (i->empty()) { - if (p < s.size()) { - res += s[p]; - } - p++; - } else { - p += i->size(); - } - for (auto& path : j->second) { - context.insert(path); - } - j->second.clear(); - break; - } - } - if (!found) { - if (p < s.size()) { - res += s[p]; - } - p++; - } - } - - mkString(v, res, context); -} - -/************************************************************* - * Versions - *************************************************************/ - -static void prim_parseDrvName(EvalState& state, const Pos& pos, Value** args, - Value& v) { - std::string name = state.forceStringNoCtx(*args[0], pos); - DrvName parsed(name); - state.mkAttrs(v, 2); - mkString(*state.allocAttr(v, state.sName), parsed.name); - mkString(*state.allocAttr(v, state.symbols.Create("version")), - parsed.version); -} - -static void prim_compareVersions(EvalState& state, const Pos& pos, Value** args, - Value& v) { - std::string version1 = state.forceStringNoCtx(*args[0], pos); - std::string version2 = state.forceStringNoCtx(*args[1], pos); - mkInt(v, compareVersions(version1, version2)); -} - -static void prim_splitVersion(EvalState& state, const Pos& pos, Value** args, - Value& v) { - std::string version = state.forceStringNoCtx(*args[0], pos); - auto iter = version.cbegin(); - Strings components; - while (iter != version.cend()) { - auto component = nextComponent(iter, version.cend()); - if (component.empty()) { - break; - } - components.emplace_back(std::move(component)); - } - state.mkList(v, components.size()); - unsigned int n = 0; - for (auto& component : components) { - auto listElem = (*v.list)[n++] = state.allocValue(); - mkString(*listElem, component); - } -} - -/************************************************************* - * Networking - *************************************************************/ - -void fetch(EvalState& state, const Pos& pos, Value** args, Value& v, - const std::string& who, bool unpack, - const std::string& defaultName) { - CachedDownloadRequest request(""); - request.unpack = unpack; - request.name = defaultName; - - state.forceValue(*args[0]); - - if (args[0]->type == tAttrs) { - state.forceAttrs(*args[0], pos); - - for (auto& attr : *args[0]->attrs) { - std::string n(attr.second.name); - if (n == "url") { - request.uri = - state.forceStringNoCtx(*attr.second.value, *attr.second.pos); - } else if (n == "sha256") { - auto hash_ = Hash::deserialize( - state.forceStringNoCtx(*attr.second.value, *attr.second.pos), - htSHA256); - request.expectedHash = Hash::unwrap_throw(hash_); - } else if (n == "name") { - request.name = - state.forceStringNoCtx(*attr.second.value, *attr.second.pos); - } else { - throw EvalError(format("unsupported argument '%1%' to '%2%', at %3%") % - attr.second.name % who % attr.second.pos); - } - } - - if (request.uri.empty()) { - throw EvalError(format("'url' argument required, at %1%") % pos); - } - - } else { - request.uri = state.forceStringNoCtx(*args[0], pos); - } - - state.checkURI(request.uri); - - if (evalSettings.pureEval && !request.expectedHash) { - throw Error("in pure evaluation mode, '%s' requires a 'sha256' argument", - who); - } - - auto res = getDownloader()->downloadCached(state.store, request); - - if (state.allowedPaths) { - state.allowedPaths->insert(res.path); - } - - mkString(v, res.storePath, PathSet({res.storePath})); -} - -static void prim_fetchurl(EvalState& state, const Pos& pos, Value** args, - Value& v) { - fetch(state, pos, args, v, "fetchurl", false, ""); -} - -static void prim_fetchTarball(EvalState& state, const Pos& pos, Value** args, - Value& v) { - fetch(state, pos, args, v, "fetchTarball", true, "source"); -} - -/************************************************************* - * Primop registration - *************************************************************/ - -RegisterPrimOp::PrimOps* RegisterPrimOp::primOps; - -RegisterPrimOp::RegisterPrimOp(const std::string& name, size_t arity, - PrimOpFun fun) { - if (primOps == nullptr) { - primOps = new PrimOps; - } - primOps->emplace_back(name, arity, fun); -} - -void EvalState::createBaseEnv() { - baseEnv.up = nullptr; - - /* Add global constants such as `true' to the base environment. */ - Value v; - - /* `builtins' must be first! */ - mkAttrs(v, 128); - addConstant("builtins", v); - - mkBool(v, true); - addConstant("true", v); - - mkBool(v, false); - addConstant("false", v); - - mkNull(v); - addConstant("null", v); - - auto vThrow = addPrimOp("throw", 1, prim_throw); - - auto addPurityError = [&](const std::string& name) { - Value* v2 = allocValue(); - mkString(*v2, fmt("'%s' is not allowed in pure evaluation mode", name)); - mkApp(v, *vThrow, *v2); - addConstant(name, v); - }; - - if (!evalSettings.pureEval) { - mkInt(v, time(nullptr)); - addConstant("__currentTime", v); - } - - if (!evalSettings.pureEval) { - mkString(v, settings.thisSystem); - addConstant("__currentSystem", v); - } - - mkString(v, nixVersion); - addConstant("__nixVersion", v); - - mkString(v, store->storeDir); - addConstant("__storeDir", v); - - /* Language version. This should be increased every time a new - language feature gets added. It's not necessary to increase it - when primops get added, because you can just use `builtins ? - primOp' to check. */ - mkInt(v, 5); - addConstant("__langVersion", v); - - // Miscellaneous - auto vScopedImport = addPrimOp("scopedImport", 2, prim_scopedImport); - Value* v2 = allocValue(); - mkAttrs(*v2, 0); - mkApp(v, *vScopedImport, *v2); - forceValue(v); - addConstant("import", v); - addPrimOp("__typeOf", 1, prim_typeOf); - addPrimOp("isNull", 1, prim_isNull); - addPrimOp("__isFunction", 1, prim_isFunction); - addPrimOp("__isString", 1, prim_isString); - addPrimOp("__isInt", 1, prim_isInt); - addPrimOp("__isFloat", 1, prim_isFloat); - addPrimOp("__isBool", 1, prim_isBool); - addPrimOp("__isPath", 1, prim_isPath); - addPrimOp("__genericClosure", 1, prim_genericClosure); - addPrimOp("abort", 1, prim_abort); - addPrimOp("__addErrorContext", 2, prim_addErrorContext); - addPrimOp("__tryEval", 1, prim_tryEval); - addPrimOp("__getEnv", 1, prim_getEnv); - - // Strictness - addPrimOp("__seq", 2, prim_seq); - addPrimOp("__deepSeq", 2, prim_deepSeq); - - // Debugging - addPrimOp("__trace", 2, prim_trace); - addPrimOp("__valueSize", 1, prim_valueSize); - - // Paths - addPrimOp("__toPath", 1, prim_toPath); - if (evalSettings.pureEval) { - addPurityError("__storePath"); - } else { - addPrimOp("__storePath", 1, prim_storePath); - } - addPrimOp("__pathExists", 1, prim_pathExists); - addPrimOp("baseNameOf", 1, prim_baseNameOf); - addPrimOp("dirOf", 1, prim_dirOf); - addPrimOp("__readFile", 1, prim_readFile); - addPrimOp("__readDir", 1, prim_readDir); - addPrimOp("__findFile", 2, prim_findFile); - addPrimOp("__hashFile", 2, prim_hashFile); - - // Creating files - addPrimOp("__toXML", 1, prim_toXML); - addPrimOp("__toJSON", 1, prim_toJSON); - addPrimOp("__fromJSON", 1, prim_fromJSON); - addPrimOp("__toFile", 2, prim_toFile); - addPrimOp("__filterSource", 2, prim_filterSource); - addPrimOp("__path", 1, prim_path); - - // Sets - addPrimOp("__attrNames", 1, prim_attrNames); - addPrimOp("__attrValues", 1, prim_attrValues); - addPrimOp("__getAttr", 2, prim_getAttr); - addPrimOp("__unsafeGetAttrPos", 2, prim_unsafeGetAttrPos); - addPrimOp("__hasAttr", 2, prim_hasAttr); - addPrimOp("__isAttrs", 1, prim_isAttrs); - addPrimOp("removeAttrs", 2, prim_removeAttrs); - addPrimOp("__listToAttrs", 1, prim_listToAttrs); - addPrimOp("__intersectAttrs", 2, prim_intersectAttrs); - addPrimOp("__catAttrs", 2, prim_catAttrs); - addPrimOp("__functionArgs", 1, prim_functionArgs); - addPrimOp("__mapAttrs", 2, prim_mapAttrs); - - // Lists - addPrimOp("__isList", 1, prim_isList); - addPrimOp("__elemAt", 2, prim_elemAt); - addPrimOp("__head", 1, prim_head); - addPrimOp("__tail", 1, prim_tail); - addPrimOp("map", 2, prim_map); - addPrimOp("__filter", 2, prim_filter); - addPrimOp("__elem", 2, prim_elem); - addPrimOp("__concatLists", 1, prim_concatLists); - addPrimOp("__length", 1, prim_length); - addPrimOp("__foldl'", 3, prim_foldlStrict); - addPrimOp("__any", 2, prim_any); - addPrimOp("__all", 2, prim_all); - addPrimOp("__genList", 2, prim_genList); - addPrimOp("__sort", 2, prim_sort); - addPrimOp("__partition", 2, prim_partition); - addPrimOp("__concatMap", 2, prim_concatMap); - - // Integer arithmetic - addPrimOp("__add", 2, prim_add); - addPrimOp("__sub", 2, prim_sub); - addPrimOp("__mul", 2, prim_mul); - addPrimOp("__div", 2, prim_div); - addPrimOp("__bitAnd", 2, prim_bitAnd); - addPrimOp("__bitOr", 2, prim_bitOr); - addPrimOp("__bitXor", 2, prim_bitXor); - addPrimOp("__lessThan", 2, prim_lessThan); - - // String manipulation - addPrimOp("toString", 1, prim_toString); - addPrimOp("__substring", 3, prim_substring); - addPrimOp("__stringLength", 1, prim_stringLength); - addPrimOp("__hashString", 2, prim_hashString); - addPrimOp("__match", 2, prim_match); - addPrimOp("__split", 2, prim_split); - addPrimOp("__concatStringsSep", 2, prim_concatStringSep); - addPrimOp("__replaceStrings", 3, prim_replaceStrings); - - // Versions - addPrimOp("__parseDrvName", 1, prim_parseDrvName); - addPrimOp("__compareVersions", 2, prim_compareVersions); - addPrimOp("__splitVersion", 1, prim_splitVersion); - - // Derivations - addPrimOp("derivationStrict", 1, prim_derivationStrict); - addPrimOp("placeholder", 1, prim_placeholder); - - // Networking - addPrimOp("__fetchurl", 1, prim_fetchurl); - addPrimOp("fetchTarball", 1, prim_fetchTarball); - - /* Add a wrapper around the derivation primop that computes the - `drvPath' and `outPath' attributes lazily. */ - std::string path = - canonPath(settings.nixDataDir + "/nix/corepkgs/derivation.nix", true); - sDerivationNix = symbols.Create(path); - evalFile(path, v); - addConstant("derivation", v); - - /* Add a value containing the current Nix expression search path. */ - mkList(v, searchPath.size()); - int n = 0; - for (auto& i : searchPath) { - v2 = (*v.list)[n++] = allocValue(); - mkAttrs(*v2, 2); - mkString(*allocAttr(*v2, symbols.Create("path")), i.second); - mkString(*allocAttr(*v2, symbols.Create("prefix")), i.first); - } - addConstant("__nixPath", v); - - if (RegisterPrimOp::primOps != nullptr) { - for (auto& primOp : *RegisterPrimOp::primOps) { - addPrimOp(std::get<0>(primOp), std::get<1>(primOp), std::get<2>(primOp)); - } - } -} - -} // namespace nix |