118 lines
2.9 KiB
C++
118 lines
2.9 KiB
C++
#pragma once
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#include "types.hh"
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#include "hash.hh"
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#include "store-api.hh"
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#include <map>
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namespace nix {
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/* Extension of derivations in the Nix store. */
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const string drvExtension = ".drv";
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/* Abstract syntax of derivations. */
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struct DerivationOutput
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{
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Path path;
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string hashAlgo; /* hash used for expected hash computation */
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string hash; /* expected hash, may be null */
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DerivationOutput()
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{
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}
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DerivationOutput(Path path, string hashAlgo, string hash)
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{
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this->path = path;
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this->hashAlgo = hashAlgo;
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this->hash = hash;
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}
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void parseHashInfo(bool & recursive, Hash & hash) const;
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};
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typedef std::map<string, DerivationOutput> DerivationOutputs;
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/* For inputs that are sub-derivations, we specify exactly which
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output IDs we are interested in. */
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typedef std::map<Path, StringSet> DerivationInputs;
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typedef std::map<string, string> StringPairs;
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struct BasicDerivation
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{
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DerivationOutputs outputs; /* keyed on symbolic IDs */
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PathSet inputSrcs; /* inputs that are sources */
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string platform;
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Path builder;
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Strings args;
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StringPairs env;
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virtual ~BasicDerivation() { };
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/* Return the path corresponding to the output identifier `id' in
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the given derivation. */
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Path findOutput(const string & id) const;
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bool isBuiltin() const;
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/* Return true iff this is a fixed-output derivation. */
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bool isFixedOutput() const;
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/* Return the output paths of a derivation. */
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PathSet outputPaths() const;
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};
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struct Derivation : BasicDerivation
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{
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DerivationInputs inputDrvs; /* inputs that are sub-derivations */
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/* Print a derivation. */
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std::string unparse() const;
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};
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class Store;
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/* Write a derivation to the Nix store, and return its path. */
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Path writeDerivation(ref<Store> store,
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const Derivation & drv, const string & name, RepairFlag repair = NoRepair);
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/* Read a derivation from a file. */
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Derivation readDerivation(const Path & drvPath);
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/* Check whether a file name ends with the extension for
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derivations. */
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bool isDerivation(const string & fileName);
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Hash hashDerivationModulo(Store & store, Derivation drv);
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/* Memoisation of hashDerivationModulo(). */
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typedef std::map<Path, Hash> DrvHashes;
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extern DrvHashes drvHashes; // FIXME: global, not thread-safe
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/* Split a string specifying a derivation and a set of outputs
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(/nix/store/hash-foo!out1,out2,...) into the derivation path and
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the outputs. */
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typedef std::pair<string, std::set<string> > DrvPathWithOutputs;
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DrvPathWithOutputs parseDrvPathWithOutputs(const string & s);
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Path makeDrvPathWithOutputs(const Path & drvPath, const std::set<string> & outputs);
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bool wantOutput(const string & output, const std::set<string> & wanted);
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struct Source;
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struct Sink;
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Source & readDerivation(Source & in, Store & store, BasicDerivation & drv);
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Sink & operator << (Sink & out, const BasicDerivation & drv);
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std::string hashPlaceholder(const std::string & outputName);
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}
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