mirror of
https://github.com/privatevoid-net/nix-super.git
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8c0590fa32
Thunks are now overwritten by a helper function `Value::finishValue(newType, payload)` (where `payload` is the original anonymous union inside `Value`). This helps to ensure we never update a value elsewhere, since that would be incompatible with parallel evaluation (i.e. after a value has transitioned from being a thunk to being a non-thunk, it should be immutable). There were two places where this happened: `Value::mkString()` and `ExprAttrs::eval()`. This PR also adds a bunch of accessor functions for value contents, like `Value::integer()` to access the integer field in the union.
105 lines
2.8 KiB
C++
105 lines
2.8 KiB
C++
#pragma once
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///@file
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#include "eval.hh"
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#include "path.hh"
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#include <string>
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#include <map>
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namespace nix {
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/**
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* A "parsed" package attribute set.
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*/
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struct PackageInfo
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{
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public:
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typedef std::map<std::string, std::optional<StorePath>> Outputs;
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private:
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EvalState * state;
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mutable std::string name;
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mutable std::string system;
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mutable std::optional<std::optional<StorePath>> drvPath;
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mutable std::optional<StorePath> outPath;
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mutable std::string outputName;
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Outputs outputs;
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/**
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* Set if we get an AssertionError
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*/
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bool failed = false;
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const Bindings * attrs = nullptr, * meta = nullptr;
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const Bindings * getMeta();
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bool checkMeta(Value & v);
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public:
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/**
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* path towards the derivation
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*/
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std::string attrPath;
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PackageInfo(EvalState & state) : state(&state) { };
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PackageInfo(EvalState & state, std::string attrPath, const Bindings * attrs);
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PackageInfo(EvalState & state, ref<Store> store, const std::string & drvPathWithOutputs);
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std::string queryName() const;
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std::string querySystem() const;
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std::optional<StorePath> queryDrvPath() const;
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StorePath requireDrvPath() const;
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StorePath queryOutPath() const;
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std::string queryOutputName() const;
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/**
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* Return the unordered map of output names to (optional) output paths.
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* The "outputs to install" are determined by `meta.outputsToInstall`.
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*/
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Outputs queryOutputs(bool withPaths = true, bool onlyOutputsToInstall = false);
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StringSet queryMetaNames();
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Value * queryMeta(const std::string & name);
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std::string queryMetaString(const std::string & name);
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NixInt queryMetaInt(const std::string & name, NixInt def);
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NixFloat queryMetaFloat(const std::string & name, NixFloat def);
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bool queryMetaBool(const std::string & name, bool def);
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void setMeta(const std::string & name, Value * v);
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/*
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MetaInfo queryMetaInfo(EvalState & state) const;
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MetaValue queryMetaInfo(EvalState & state, const string & name) const;
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*/
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void setName(const std::string & s) { name = s; }
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void setDrvPath(StorePath path) { drvPath = {{std::move(path)}}; }
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void setOutPath(StorePath path) { outPath = {{std::move(path)}}; }
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void setFailed() { failed = true; };
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bool hasFailed() { return failed; };
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};
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#if HAVE_BOEHMGC
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typedef std::list<PackageInfo, traceable_allocator<PackageInfo>> PackageInfos;
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#else
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typedef std::list<PackageInfo> PackageInfos;
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#endif
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/**
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* If value `v` denotes a derivation, return a PackageInfo object
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* describing it. Otherwise return nothing.
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*/
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std::optional<PackageInfo> getDerivation(EvalState & state,
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Value & v, bool ignoreAssertionFailures);
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void getDerivations(EvalState & state, Value & v, const std::string & pathPrefix,
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Bindings & autoArgs, PackageInfos & drvs,
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bool ignoreAssertionFailures);
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}
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