#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);

}
ce30a4898bdfc2399e67cbccc8955e1&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2022-06-06 22:43:30 +0200'>2022-06-06</span></td><td><a href='/guix/commit/gnu/packages.scm?id=635d49f97ee233bbb2673f97d7556c3c91b55889'>packages: Use SRFI-71 instead of SRFI-11.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages.scm (%package-module-path): Use 'let*' instead of
'let*-values'.
(specification-&gt;package, specification-&gt;location)
(specification-&gt;package+output): Use 'let' instead of 'let-values'.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-06-06 22:43:30 +0200'>2022-06-06</span></td><td><a href='/guix/commit/gnu/packages.scm?id=7041fe0646a9603e7d1d6bde139a284146515917'>packages: Add 'specifications-&gt;packages'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages.scm (specifications-&gt;packages): New procedure.
* guix/scripts/home/import.scm (manifest+configuration-files-&gt;code): Use it.
* tests/home-import.scm (match-home-environment-no-services)
(match-home-environment-no-services-nor-packages)
(match-home-environment-bash-service)
(match-home-environment-bash-service-with-alias): Adjust 'packages'
field accordingly.

Co-authored-by: Ludovic Courtès &lt;ludo@gnu.org&gt;
</span></span></td><td>Antero Mejr</td></tr>
<tr><td><span title='2022-04-04 22:58:03 +0200'>2022-04-04</span></td><td><a href='/guix/commit/gnu/packages.scm?id=f54f2aa9df5047b348ca104f5145af50c1a482f6'>packages: Add 'package-unique-version-prefix'.</a><span class='msg-avail'>...<span class='msg-tooltip'>* gnu/packages.scm (package-unique-version-prefix): New procedure.
* guix/scripts/package.scm (manifest-entry-version-prefix): Use it.
* tests/packages.scm ("package-unique-version-prefix, gcc@8")
("package-unique-version-prefix, grep"): New tests.
</span></span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-01-11 20:34:59 +0100'>2022-01-11</span></td><td><a href='/guix/commit/gnu/packages.scm?id=0552dcb294bbfed76d7a495f5e368c53f20b852a'>shell: Cache profiles even when using package specs.</a><span class='msg-avail'>...<span class='msg-tooltip'>This enables profile caching not just when '-m' or '-f' is used, but
also when package specs are passed on the command line, as in:

  guix shell -D guix git

It also changes profile cache keys to include the system type, which was
previously ignored.

* guix/scripts/shell.scm (options-with-caching)[single-file-for-caching]:
Remove.
Call 'profile-cached-gc-root' instead; adjust to accept two values.
(profile-cache-primary-key): New procedure.
(profile-cache-key): Remove.
(profile-file-cache-key, profile-spec-cache-key): New procedures.
(profile-cached-gc-root): Rewrite to include functionality formally in
'single-file-for-caching', but extend to handle package specs.
* gnu/packages.scm (cache-is-authoritative?): Export.
* guix/transformations.scm (transformation-option-key?): New procedure.
* doc/guix.texi (Invoking guix shell): Move '--rebuild-cache'
documentation to the bottom, just above '--root'.  Explain caching and
how these two options relate to that.
</span></span></td><td>Ludovic Courtès</td></tr>