8d8d47abd2
If a derivation has multiple outputs, then we only want to download
those outputs that are actuallty needed. So if we do "nix-build -A
openssl.man", then only the "man" output should be downloaded.
Likewise if another package depends on ${openssl.man}.
The tricky part is that different derivations can depend on different
outputs of a given derivation, so we may need to restart the
corresponding derivation goal if that happens.
93 lines
2.3 KiB
C++
93 lines
2.3 KiB
C++
#pragma once
|
|
|
|
#include "types.hh"
|
|
#include "hash.hh"
|
|
|
|
#include <map>
|
|
|
|
|
|
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, bool repair = false);
|
|
|
|
/* 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;
|
|
|
|
/* Split a string specifying a derivation and a set of outputs
|
|
(/nix/store/hash-foo!out1,out2,...) into the derivation path and
|
|
the outputs. */
|
|
typedef std::pair<string, std::set<string> > DrvPathWithOutputs;
|
|
DrvPathWithOutputs parseDrvPathWithOutputs(const string & s);
|
|
|
|
Path makeDrvPathWithOutputs(const Path & drvPath, const std::set<string> & outputs);
|
|
|
|
bool wantOutput(const string & output, const std::set<string> & wanted);
|
|
|
|
|
|
}
|