eldritch horrorsandjade
b0d7a81613
clangd broke because it can't look through symlinks. compile_commands manipulation does not fix it, clangd configuration does not fix it, a vfs overlay does not fix it, and while a combination of those can fix it with a bind mount in place that's just too cursed to even consider clangd bug: https://github.com/llvm/llvm-project/issues/116877 Change-Id: I8e3e8489548eb3a7aa65ac9d12a5ec8abf814aec
109 lines
3.2 KiB
C++
109 lines
3.2 KiB
C++
#include "lix/libutil/deprecated-features.hh"
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// Required for instances of to_json and from_json for DeprecatedFeature
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#include "lix/libutil/deprecated-features-json.hh"
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#include "lix/libutil/strings.hh"
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#include "nlohmann/json.hpp"
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namespace nix {
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struct DeprecatedFeatureDetails
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{
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DeprecatedFeature tag;
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std::string_view name;
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std::string_view description;
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};
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/**
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* If two different PRs both add a deprecated feature, and we just
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* used a number for this, we *woudln't* get merge conflict and the
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* counter will be incremented once instead of twice, causing a build
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* failure.
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*
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* By instead defining this instead as a dummy bottom deprecated
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* feature, we do not have this issue.
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*/
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constexpr size_t numDepFeatures = static_cast<size_t>(Dep::NumDepFeatures);
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constexpr std::array<DeprecatedFeatureDetails, numDepFeatures> depFeatureDetails = {{
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#include "deprecated-features-impl.gen.inc"
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}};
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static_assert(
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[]() constexpr {
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for (auto [index, feature] : enumerate(depFeatureDetails))
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if (index != (size_t)feature.tag)
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return false;
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return true;
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}(),
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"array order does not match enum tag order");
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const std::optional<DeprecatedFeature> parseDeprecatedFeature(const std::string_view & name)
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{
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using ReverseDepMap = std::map<std::string_view, DeprecatedFeature>;
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static std::unique_ptr<ReverseDepMap> reverseDepMap = []() {
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auto reverseDepMap = std::make_unique<ReverseDepMap>();
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for (auto & depFeature : depFeatureDetails)
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(*reverseDepMap)[depFeature.name] = depFeature.tag;
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return reverseDepMap;
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}();
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if (auto feature = get(*reverseDepMap, name))
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return *feature;
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else
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return std::nullopt;
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}
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std::string_view showDeprecatedFeature(const DeprecatedFeature tag)
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{
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assert((size_t)tag < depFeatureDetails.size());
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return depFeatureDetails[(size_t)tag].name;
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}
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nlohmann::json documentDeprecatedFeatures()
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{
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StringMap res;
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for (auto & depFeature : depFeatureDetails)
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res[std::string { depFeature.name }] =
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trim(stripIndentation(depFeature.description));
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return (nlohmann::json) res;
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}
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DeprecatedFeatures parseDeprecatedFeatures(const std::set<std::string> & rawFeatures)
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{
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DeprecatedFeatures res{};
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for (auto & rawFeature : rawFeatures)
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if (auto feature = parseDeprecatedFeature(rawFeature))
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res = res | *feature;
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return res;
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}
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MissingDeprecatedFeature::MissingDeprecatedFeature(DeprecatedFeature feature)
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: Error("Lix feature '%1%' is deprecated and should not be used anymore; use '--extra-deprecated-features %1%' to disable this error", showDeprecatedFeature(feature))
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, missingFeature(feature)
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{}
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std::ostream & operator <<(std::ostream & str, const DeprecatedFeature & feature)
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{
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return str << showDeprecatedFeature(feature);
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}
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void to_json(nlohmann::json & j, const DeprecatedFeature & feature)
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{
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j = showDeprecatedFeature(feature);
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}
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void from_json(const nlohmann::json & j, DeprecatedFeature & feature)
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{
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const std::string input = j;
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const auto parsed = parseDeprecatedFeature(input);
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if (parsed.has_value())
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feature = *parsed;
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else
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throw Error("Unknown deprecated feature '%s' in JSON input", input);
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}
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}
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