forked from lix-project/lix
Yorick van Pelt
ebf2fd76b1
nix show-config --json was serializing experimental features as ints. nlohmann::json will automatically use these definitions to serialize and deserialize ExperimentalFeatures. Strictly, we don't use the from_json instance yet, it's provided for completeness and hopefully future use.
61 lines
1.4 KiB
C++
61 lines
1.4 KiB
C++
#pragma once
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#include "comparator.hh"
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#include "error.hh"
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#include "nlohmann/json_fwd.hpp"
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#include "types.hh"
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namespace nix {
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/**
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* The list of available experimental features.
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*
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* If you update this, don’t forget to also change the map defining their
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* string representation in the corresponding `.cc` file.
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**/
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enum struct ExperimentalFeature
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{
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CaDerivations,
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ImpureDerivations,
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Flakes,
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NixCommand,
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RecursiveNix,
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NoUrlLiterals,
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FetchClosure,
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};
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/**
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* Just because writing `ExperimentalFeature::CaDerivations` is way too long
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*/
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using Xp = ExperimentalFeature;
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const std::optional<ExperimentalFeature> parseExperimentalFeature(
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const std::string_view & name);
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std::string_view showExperimentalFeature(const ExperimentalFeature);
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std::ostream & operator<<(
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std::ostream & str,
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const ExperimentalFeature & feature);
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/**
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* Parse a set of strings to the corresponding set of experimental features,
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* ignoring (but warning for) any unkwown feature.
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*/
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std::set<ExperimentalFeature> parseFeatures(const std::set<std::string> &);
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class MissingExperimentalFeature : public Error
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{
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public:
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ExperimentalFeature missingFeature;
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MissingExperimentalFeature(ExperimentalFeature);
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};
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/**
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* Semi-magic conversion to and from json.
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* See the nlohmann/json readme for more details.
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*/
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void to_json(nlohmann::json&, const ExperimentalFeature&);
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void from_json(const nlohmann::json&, ExperimentalFeature&);
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}
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