#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);

/* Read a derivation from a file. */
Derivation readDerivation(const Path & drvPath);

/* 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);

PathSet outputPaths(const Derivation & drv);

}
v class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/packages/astronomy.scm?id=8d26d67afc2c94716937bd9188d7f63c7c018225&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2020-10-01 00:13:42 +0200'>2020-10-01</span></td><td><a href='/guix/commit/gnu/packages/astronomy.scm?id=5ccb3b231a74dfba8960a632abf3759adc8e2649'>gnu: stellarium: Update to 0.20.3.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2020-09-30 09:28:26 +0300'>2020-09-30</span></td><td><a href='/guix/commit/gnu/packages/astronomy.scm?id=1628d57bb5c6ab30a04202c229de642b94faac85'>gnu: Fix package references.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2020-09-07 10:00:05 +0300'>2020-09-07</span></td><td><a href='/guix/commit/gnu/packages/astronomy.scm?id=2e5fef86d32abb831f35c7df1bf93cbf580d02d9'>gnu: gnuastro: Update to 0.13.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>
<tr><td><span title='2020-08-18 05:38:38 +0200'>2020-08-18</span></td><td><a href='/guix/commit/gnu/packages/astronomy.scm?id=84ee898867b9e9b773d97235bc5d6c79439623ed'>gnu: cfitsio: Update to 3.49.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2020-06-29 15:47:12 +0200'>2020-06-29</span></td><td><a href='/guix/commit/gnu/packages/astronomy.scm?id=09fbfe147efa0a77cd1c99f1052225958416c8b0'>gnu: stellarium: Update to 0.20.2.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>