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nix/src/libstore/parsed-derivations.hh
John Ericson 197feed51d Clean up DerivationOutput, and headers
1. `DerivationOutput` now as the `std::variant` as a base class. And the
   variants are given hierarchical names under `DerivationOutput`.

   In 8e0d0689be @matthewbauer and I
   didn't know a better idiom, and so we made it a field. But this sort
   of "newtype" is anoying for literals downstream.

   Since then we leaned the base class, inherit the constructors trick,
   e.g. used in `DerivedPath`. Switching to use that makes this more
   ergonomic, and consistent.

2. `store-api.hh` and `derivations.hh` are now independent.

   In bcde5456cc I swapped the dependency,
   but I now know it is better to just keep on using incomplete types as
   much as possible for faster compilation and good separation of
   concerns.
2022-03-17 22:35:53 +00:00

47 lines
1 KiB
C++

#pragma once
#include "derivations.hh"
#include "store-api.hh"
#include <nlohmann/json_fwd.hpp>
namespace nix {
class ParsedDerivation
{
StorePath drvPath;
BasicDerivation & drv;
std::unique_ptr<nlohmann::json> structuredAttrs;
public:
ParsedDerivation(const StorePath & drvPath, BasicDerivation & drv);
~ParsedDerivation();
const nlohmann::json * getStructuredAttrs() const
{
return structuredAttrs.get();
}
std::optional<std::string> getStringAttr(const std::string & name) const;
bool getBoolAttr(const std::string & name, bool def = false) const;
std::optional<Strings> getStringsAttr(const std::string & name) const;
StringSet getRequiredSystemFeatures() const;
bool canBuildLocally(Store & localStore) const;
bool willBuildLocally(Store & localStore) const;
bool substitutesAllowed() const;
std::optional<nlohmann::json> prepareStructuredAttrs(Store & store, const StorePathSet & inputPaths);
};
std::string writeStructuredAttrsShell(const nlohmann::json & json);
}