#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);

}
'>etc</a>/<a href='/guix/log/etc/snippets?id=f32a49fcebcbb8f656f8fc90cb9a5598e083c6cf'>snippets</a>/<a href='/guix/log/etc/snippets/text-mode?id=f32a49fcebcbb8f656f8fc90cb9a5598e083c6cf'>text-mode</a>/<a href='/guix/log/etc/snippets/text-mode/guix-commit-message-update-package?id=f32a49fcebcbb8f656f8fc90cb9a5598e083c6cf'>guix-commit-message-update-package</a></div><div class='content'><table class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/etc/snippets/text-mode/guix-commit-message-update-package?id=f32a49fcebcbb8f656f8fc90cb9a5598e083c6cf&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2022-01-19 20:47:03 +0100'>2022-01-19</span></td><td><a href='/guix/commit/etc/snippets/text-mode/guix-commit-message-update-package?id=2c9f13ba6379afdad8df82166ea512c35d25aa4a'>etc: Match define-public only at line start.</a><span class='msg-avail'>...<span class='msg-tooltip'>The current regexp simply matches the first occurence, which more often than
not points to the *previous* variable.

* etc/snippets/text-mode/guix-commit-message-update-package ($1): Restrict
match to beginning of line with optional indentation.
</span></span></td><td>Liliana Marie Prikler</td></tr>
<tr><td><span title='2020-12-04 17:09:38 +0100'>2020-12-04</span></td><td><a href='/guix/commit/etc/snippets/text-mode/guix-commit-message-update-package?id=988a49c78ef19ad25cef543e2059a19db04bbd36'>etc: snippets: Fix name extraction.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/snippets/text-mode/guix-commit-message-update-package: Since git commit
mode is not derived from any Lisp mode, so-called sexp or symbols do not
include the period character.  As a consequence, names including versions are
not properly extracted. Also use more idiomatic (goto-char (point-min))
instead of (beginning-of-buffer).
</span></span></td><td>Nicolas Goaziou</td></tr>
<tr><td><span title='2019-03-07 23:55:24 +0100'>2019-03-07</span></td><td><a href='/guix/commit/etc/snippets/text-mode/guix-commit-message-update-package?id=d6234620ace1863d8102b065311ef3d94e0931da'>etc: snippets: Prefill package name and version.</a><span class='msg-avail'>...<span class='msg-tooltip'>* etc/snippets/text-mode/guix-commit-message-update-package: Extract package
name and version from git diff output.
</span></span></td><td>Ricardo Wurmus</td></tr>