lix/src/libstore/realisation.hh
regnat e69cfdebb0 Remove the visit machinery in RealisedPath
In addition to being some ugly template trickery, it was also totally
useless as it was used in only one place where I could replace it by
just a few extra characters
2021-02-05 11:42:33 +01:00

74 lines
1.6 KiB
C++

#pragma once
#include "path.hh"
#include <nlohmann/json_fwd.hpp>
#include "comparator.hh"
namespace nix {
struct DrvOutput {
// The hash modulo of the derivation
Hash drvHash;
std::string outputName;
std::string to_string() const;
std::string strHash() const
{ return drvHash.to_string(Base16, true); }
static DrvOutput parse(const std::string &);
GENERATE_CMP(DrvOutput, me->drvHash, me->outputName);
};
struct Realisation {
DrvOutput id;
StorePath outPath;
nlohmann::json toJSON() const;
static Realisation fromJSON(const nlohmann::json& json, const std::string& whence);
StorePath getPath() const { return outPath; }
GENERATE_CMP(Realisation, me->id, me->outPath);
};
struct OpaquePath {
StorePath path;
StorePath getPath() const { return path; }
GENERATE_CMP(OpaquePath, me->path);
};
/**
* A store path with all the history of how it went into the store
*/
struct RealisedPath {
/*
* A path is either the result of the realisation of a derivation or
* an opaque blob that has been directly added to the store
*/
using Raw = std::variant<Realisation, OpaquePath>;
Raw raw;
using Set = std::set<RealisedPath>;
RealisedPath(StorePath path) : raw(OpaquePath{path}) {}
RealisedPath(Realisation r) : raw(r) {}
/**
* Get the raw store path associated to this
*/
StorePath path() const;
void closure(Store& store, Set& ret) const;
static void closure(Store& store, const Set& startPaths, Set& ret);
Set closure(Store& store) const;
GENERATE_CMP(RealisedPath, me->raw);
};
}