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#pragma once
#include "types.hh"
#include "hash.hh"
#include "store-api.hh"
#include <map>
namespace nix {
/* Abstract syntax of derivations. */
/// Pair of a hash, and how the file system was ingested
struct DerivationOutputHash {
FileIngestionMethod method;
Hash hash;
std::string printMethodAlgo() const;
};
struct DerivationOutput
{
StorePath path;
std::optional<DerivationOutputHash> hash; /* hash used for expected hash computation */
void parseHashInfo(FileIngestionMethod & recursive, Hash & hash) const;
};
typedef std::map<string, DerivationOutput> DerivationOutputs;
/* For inputs that are sub-derivations, we specify exactly which
output IDs we are interested in. */
typedef std::map<StorePath, StringSet> DerivationInputs;
typedef std::map<string, string> StringPairs;
struct BasicDerivation
{
DerivationOutputs outputs; /* keyed on symbolic IDs */
StorePathSet inputSrcs; /* inputs that are sources */
string platform;
Path builder;
Strings args;
StringPairs env;
BasicDerivation() { }
virtual ~BasicDerivation() { };
/* Return the path corresponding to the output identifier `id' in
the given derivation. */
const StorePath & findOutput(const std::string & id) const;
bool isBuiltin() const;
/* Return true iff this is a fixed-output derivation. */
bool isFixedOutput() const;
/* Return the output paths of a derivation. */
StorePathSet outputPaths() const;
/* Return the output names of a derivation. */
StringSet outputNames() const;
};
struct Derivation : BasicDerivation
{
DerivationInputs inputDrvs; /* inputs that are sub-derivations */
/* Print a derivation. */
std::string unparse(const Store & store, bool maskOutputs,
std::map<std::string, StringSet> * actualInputs = nullptr) const;
Derivation() { }
};
class Store;
/* Write a derivation to the Nix store, and return its path. */
StorePath writeDerivation(ref<Store> store,
const Derivation & drv, std::string_view name, RepairFlag repair = NoRepair);
/* Read a derivation from a file. */
Derivation readDerivation(const Store & store, const Path & drvPath);
// FIXME: remove
bool isDerivation(const string & fileName);
Hash hashDerivationModulo(Store & store, const Derivation & drv, bool maskOutputs);
/* Memoisation of hashDerivationModulo(). */
typedef std::map<StorePath, Hash> DrvHashes;
extern DrvHashes drvHashes; // FIXME: global, not thread-safe
bool wantOutput(const string & output, const std::set<string> & wanted);
struct Source;
struct Sink;
Source & readDerivation(Source & in, const Store & store, BasicDerivation & drv);
void writeDerivation(Sink & out, const Store & store, const BasicDerivation & drv);
std::string hashPlaceholder(const std::string & outputName);
}
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