forked from lix-project/lix
2be64efb02
Today's fixed output derivations and regular derivations differ in a few ways which are largely orthogonal. This replaces `isFixedOutput` with a `type` that returns an enum of possible combinations.
124 lines
3.3 KiB
C++
124 lines
3.3 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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/* Abstract syntax of derivations. */
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struct DerivationOutput
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{
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StorePath path;
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std::string hashAlgo; /* hash used for expected hash computation */
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std::string hash; /* expected hash, may be null */
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DerivationOutput(StorePath && path, std::string && hashAlgo, std::string && hash)
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: path(std::move(path))
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, hashAlgo(std::move(hashAlgo))
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, hash(std::move(hash))
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{ }
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void parseHashType(bool & recursive, HashType & hashType) const;
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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<StorePath, StringSet> DerivationInputs;
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typedef std::map<string, string> StringPairs;
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// Bit:
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// 7: regular vs ca
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// 6: floating vs fixed hash if ca, regular always floating
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// 5: pure vs impure if ca, regular always pure
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// _: Unassigned
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enum DerivationTypeAxis : uint8_t {
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DtAxisCA = 0b10000000,
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DtAxisFixed = 0b01000000,
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DtAxisImpure = 0b00100000,
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};
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enum DerivationType : uint8_t {
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DtRegular = 0b0000000,
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DtCAFixed = 0b11100000,
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};
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struct BasicDerivation
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{
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DerivationOutputs outputs; /* keyed on symbolic IDs */
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StorePathSet 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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BasicDerivation() { }
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explicit BasicDerivation(const BasicDerivation & other);
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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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const StorePath & findOutput(const std::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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DerivationType type() const;
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/* Return the output paths of a derivation. */
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StorePathSet 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 Store & store, bool maskOutputs,
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std::map<std::string, StringSet> * actualInputs = nullptr) const;
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Derivation() { }
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Derivation(Derivation && other) = default;
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explicit Derivation(const Derivation & other);
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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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StorePath 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 Store & store, const Path & drvPath);
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// FIXME: remove
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bool isDerivation(const string & fileName);
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Hash hashDerivationModulo(Store & store, const Derivation & drv, bool maskOutputs);
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/* Memoisation of hashDerivationModulo(). */
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typedef std::map<StorePath, Hash> DrvHashes;
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extern DrvHashes drvHashes; // FIXME: global, not thread-safe
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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, const Store & store, BasicDerivation & drv);
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void writeDerivation(Sink & out, const Store & store, const BasicDerivation & drv);
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std::string hashPlaceholder(const std::string & outputName);
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}
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