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-rw-r--r--nix/libstore/derivations.hh93
1 files changed, 93 insertions, 0 deletions
diff --git a/nix/libstore/derivations.hh b/nix/libstore/derivations.hh
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+#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);
+
+
+}