nix-super/src/libstore/derivations.hh
Eelco Dolstra 93227ff65c * Eliminate all uses of the global variable ‘store’ from libstore.
This should also fix:

    nix-instantiate: ./../boost/shared_ptr.hpp:254: T* boost::shared_ptr<T>::operator->() const [with T = nix::StoreAPI]: Assertion `px != 0' failed.

  which was caused by hashDerivationModulo() calling the ‘store’
  object (during store upgrades) before openStore() assigned it.
2011-08-31 21:11:50 +00:00

86 lines
2 KiB
C++

#ifndef __DERIVATIONS_H
#define __DERIVATIONS_H
#include <map>
#include "types.hh"
#include "hash.hh"
namespace nix {
/* Extension of derivations in the Nix store. */
const string drvExtension = ".drv";
/* Abstract syntax of derivations. */
struct DerivationOutput
{
Path path;
string hashAlgo; /* hash used for expected hash computation */
string hash; /* expected hash, may be null */
DerivationOutput()
{
}
DerivationOutput(Path path, string hashAlgo, string hash)
{
this->path = path;
this->hashAlgo = hashAlgo;
this->hash = hash;
}
void parseHashInfo(bool & recursive, HashType & hashType, 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<Path, StringSet> DerivationInputs;
typedef std::map<string, string> StringPairs;
struct Derivation
{
DerivationOutputs outputs; /* keyed on symbolic IDs */
DerivationInputs inputDrvs; /* inputs that are sub-derivations */
PathSet inputSrcs; /* inputs that are sources */
string platform;
Path builder;
Strings args;
StringPairs env;
};
class StoreAPI;
/* Write a derivation to the Nix store, and return its path. */
Path writeDerivation(StoreAPI & store,
const Derivation & drv, const string & name);
/* Parse a derivation. */
Derivation parseDerivation(const string & s);
/* Print a derivation. */
string unparseDerivation(const Derivation & drv);
/* Check whether a file name ends with the extensions for
derivations. */
bool isDerivation(const string & fileName);
/* Return true iff this is a fixed-output derivation. */
bool isFixedOutputDrv(const Derivation & drv);
Hash hashDerivationModulo(StoreAPI & store, Derivation drv);
/* Memoisation of hashDerivationModulo(). */
typedef std::map<Path, Hash> DrvHashes;
extern DrvHashes drvHashes;
}
#endif /* !__DERIVATIONS_H */