/* GNU Guix --- Functional package management for GNU
   Copyright (C) 2016, 2017, 2018 Ludovic Courtès <ludo@gnu.org>

   This file is part of GNU Guix.

   GNU Guix is free software; you can redistribute it and/or modify it
   under the terms of the GNU General Public License as published by
   the Free Software Foundation; either version 3 of the License, or (at
   your option) any later version.

   GNU Guix is distributed in the hope that it will be useful, but
   WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with GNU Guix.  If not, see <http://www.gnu.org/licenses/>.  */

#include <builtins.hh>
#include <util.hh>
#include <globals.hh>

#include <unistd.h>
#include <cstdlib>

namespace nix {

static void builtinDownload(const Derivation &drv,
			    const std::string &drvPath,
			    const std::string &output)
{
    /* Invoke 'guix perform-download'.  */
    Strings args;
    args.push_back("perform-download");
    args.push_back(drvPath);

    /* Close all other file descriptors. */
    closeMostFDs(set<int>());

    const char *const argv[] =
      {
	"download", drvPath.c_str(), output.c_str(), NULL
      };

    /* Tell the script what the store file name is, so that
       'strip-store-file-name' (used for instance to determine the URL of
       content-addressed mirrors) works correctly.  */
    setenv("NIX_STORE", settings.nixStore.c_str(), 1);

    /* Tell it about options such as "print-extended-build-trace".  */
    setenv("_NIX_OPTIONS", settings.pack().c_str(), 1);

    /* XXX: Hack our way to use the 'download' script from 'LIBEXECDIR/guix'
       or just 'LIBEXECDIR', depending on whether we're running uninstalled or
       not.  */
    const string subdir = getenv("GUIX_UNINSTALLED") != NULL
	? "" : "/guix";

    const string program = settings.nixLibexecDir + subdir + "/download";
    execv(program.c_str(), (char *const *) argv);

    throw SysError(format("failed to run download program '%1%'") % program);
}

static const std::map<std::string, derivationBuilder> builtins =
{
    { "download", builtinDownload }
};

derivationBuilder lookupBuiltinBuilder(const std::string & name)
{
    if (name.substr(0, 8) == "builtin:")
    {
	auto realName = name.substr(8);
	auto builder = builtins.find(realName);
	return builder == builtins.end() ? NULL : builder->second;
    }
    else
	return NULL;
}

std::list<std::string> builtinBuilderNames()
{
    std::list<std::string> result;
    for(auto&& iter: builtins)
    {
	result.push_back(iter.first);
    }
    return result;
}

}
-31 10:42:23 +0200'>2024-08-31</span></td><td><a href='/guix/commit/gnu/packages/scheme.scm?id=ae1ac8de4a37cc5b42795b45b827f859bddf36ed'>gnu: stklos: Import the correct set of modules.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2024-08-31 10:42:16 +0200'>2024-08-31</span></td><td><a href='/guix/commit/gnu/packages/scheme.scm?id=f59df1aa3c104aabff3291f6b8b155fb01aebc06'>build-systems: gnu: Export %default-gnu-imported-modules and %default-gnu-mod...</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2024-08-11 10:58:30 +0100'>2024-08-11</span></td><td><a href='/guix/commit/gnu/packages/scheme.scm?id=ce6308168d284a23820323642ab82b039f82f4a8'>gnu: chibi-scheme: Update to 0.11.0.</a><span class='msg-avail'>...</span></td><td>Ekaitz Zarraga</td></tr>
<tr><td><span title='2024-06-24 08:34:45 -0400'>2024-06-24</span></td><td><a href='/guix/commit/gnu/packages/scheme.scm?id=0dacf51553405da41a9df1d7a0ebbf1f401267ae'>gnu: gauche: Remove trailing #t.</a><span class='msg-avail'>...</span></td><td>Maxim Cournoyer</td></tr>
<tr><td><span title='2024-06-24 08:34:45 -0400'>2024-06-24</span></td><td><a href='/guix/commit/gnu/packages/scheme.scm?id=a8547a0febbc0a987f02424295699b3506ce8f21'>gnu: gauche: Update to 0.9.15.</a><span class='msg-avail'>...</span></td><td>Ashish SHUKLA</td></tr>
<tr><td><span title='2024-05-31 13:55:43 +0200'>2024-05-31</span></td><td><a href='/guix/commit/gnu/packages/scheme.scm?id=030482493edbc45b505f26ca59bb969ef001f65d'>gnu: Add r7rs-small-texinfo.</a><span class='msg-avail'>...</span></td><td>Yuval Langer</td></tr>
<tr><td><span title='2024-04-15 12:32:42 +0200'>2024-04-15</span></td><td><a href='/guix/commit/gnu/packages/scheme.scm?id=a8353e9d6b34fd8d42d2e8f14ce844849fe9c293'>gnu: Add tr7.</a><span class='msg-avail'>...</span></td><td>Artyom V. Poptsov</td></tr>
<tr><td><span title='2024-03-30 01:01:32 +0100'>2024-03-30</span></td><td><a href='/guix/commit/gnu/packages/scheme.scm?id=4b23fd7adbddc1bc18b209912c0f3ef369da2f24'>gnu: gerbil: Update to 0.18.1.</a><span class='msg-avail'>...</span></td><td>Skylar Hill</td></tr>
<tr><td><span title='2024-03-13 12:59:42 +0000'>2024-03-13</span></td><td><a href='/guix/commit/gnu/packages/scheme.scm?id=a68288c7d02b7984e4c453f24afca8534de563ef'>gnu: slib: Update to 3c1.</a><span class='msg-avail'>...</span></td><td>Andy Tai</td></tr>