85c8be6286
This was useful for an experiment with building Nix as a single compilation unit. It's not very useful otherwise but also doesn't hurt...
45 lines
1.5 KiB
C++
45 lines
1.5 KiB
C++
#include "command.hh"
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#include "common-args.hh"
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#include "shared.hh"
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#include "store-api.hh"
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#include <nlohmann/json.hpp>
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using namespace nix;
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struct CmdDescribeStores : Command, MixJSON
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{
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std::string description() override
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{
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return "show registered store types and their available options";
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}
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Category category() override { return catUtility; }
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void run() override
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{
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auto res = nlohmann::json::object();
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for (auto & implem : *Implementations::registered) {
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auto storeConfig = implem.getConfig();
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auto storeName = storeConfig->name();
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res[storeName] = storeConfig->toJSON();
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}
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if (json) {
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std::cout << res;
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} else {
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for (auto & [storeName, storeConfig] : res.items()) {
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std::cout << "## " << storeName << std::endl << std::endl;
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for (auto & [optionName, optionDesc] : storeConfig.items()) {
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std::cout << "### " << optionName << std::endl << std::endl;
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std::cout << optionDesc["description"].get<std::string>() << std::endl;
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std::cout << "default: " << optionDesc["defaultValue"] << std::endl <<std::endl;
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if (!optionDesc["aliases"].empty())
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std::cout << "aliases: " << optionDesc["aliases"] << std::endl << std::endl;
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}
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}
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}
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}
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};
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static auto rDescribeStore = registerCommand<CmdDescribeStores>("describe-stores");
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