/* GNU Guix --- Functional package management for GNU
   Copyright (C) 2016, 2017, 2018, 2019 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[] =
      {
	  "guix", "perform-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);

    const string program = settings.guixProgram;
    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;
}

}
ver'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/packages/spice.scm?id=2a333f2535a65bfa3607ef50591e9f5dbc6970d1&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2021-01-03 00:12:39 +0200'>2021-01-03</span></td><td><a href='/guix/commit/gnu/packages/spice.scm?id=395489cdc959c3f3c026bf545c3ed95efc9919f0'>gnu: spice-vdagent: Update to 0.20.0.</a><span class='msg-avail'>...</span></td><td>Vincent Legoll</td></tr>
<tr><td><span title='2020-11-05 04:00:13 +0100'>2020-11-05</span></td><td><a href='/guix/commit/gnu/packages/spice.scm?id=facdae042d034057a3255fc01336fa8a23491682'>gnu: virt-viewer: Enable VNC support.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2020-10-06 02:54:02 +0200'>2020-10-06</span></td><td><a href='/guix/commit/gnu/packages/spice.scm?id=05e9a46347649b8b5014118a8574fe2e4d210d76'>gnu: spice-protocol: Update to 0.14.3.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2020-09-24 00:37:39 -0400'>2020-09-24</span></td><td><a href='/guix/commit/gnu/packages/spice.scm?id=035df987f11cb64d99257f42932a155ebceac685'>gnu: spice-gtk: Only use "good" GStreamer plugins out of the box.</a><span class='msg-avail'>...</span></td><td>Mark H Weaver</td></tr>
<tr><td><span title='2020-05-23 15:37:57 +0200'>2020-05-23</span></td><td><a href='/guix/commit/gnu/packages/spice.scm?id=6d2155168fecee297ceb44f58fa2ccbd31ee7031'>gnu: spice-protocol: Update to 0.14.2.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2020-05-05 20:43:21 +0200'>2020-05-05</span></td><td><a href='/guix/commit/gnu/packages/spice.scm?id=87a40d7203a813921b3ef0805c2b46c0026d6c31'>Merge branch 'master' into core-updates</a></td><td>Marius Bakke</td></tr>
<tr><td><span title='2020-05-03 10:37:16 +0100'>2020-05-03</span></td><td><a href='/guix/commit/gnu/packages/spice.scm?id=17adb70f78b34a490b8e692f1a110cef72097685'>gnu: spice: Add libcacard as an input to enable smartcard support.</a><span class='msg-avail'>...</span></td><td>Christopher Baines</td></tr>
<tr><td><span title='2020-05-03 10:37:16 +0100'>2020-05-03</span></td><td><a href='/guix/commit/gnu/packages/spice.scm?id=ee3d20b9de26945d7165189d2a04900fbb785318'>gnu: Add libcacard.</a><span class='msg-avail'>...</span></td><td>Christopher Baines</td></tr>
<tr><td><span title='2020-04-10 15:53:19 +0200'>2020-04-10</span></td><td><a href='/guix/commit/gnu/packages/spice.scm?id=29c6fb0d33b3bea8677093eed1cfbd6483c9fbe8'>gnu: spice-gtk: Add an absolute reference for libjpeg in the .la files.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2020-03-10 20:50:02 +0100'>2020-03-10</span></td><td><a href='/guix/commit/gnu/packages/spice.scm?id=50b99c90c87642f664f9c9523a6e40fc8542ddcf'>Merge branch 'master' into core-updates</a></td><td>Marius Bakke</td></tr>
<tr><td><span title='2020-03-09 16:01:19 +0100'>2020-03-09</span></td><td><a href='/guix/commit/gnu/packages/spice.scm?id=99e8ce528cb81b514fd9b7edacdbdc89bffcad27'>gnu: spice-protocol: Update to 0.14.1.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2020-03-07 12:48:18 +0100'>2020-03-07</span></td><td><a href='/guix/commit/gnu/packages/spice.scm?id=c0dc4179091f85fe4b8a2bbdb07c154a7f0408ed'>gnu: spice: Update to 0.14.3.</a><span class='msg-avail'>...</span></td><td>Tobias Geerinckx-Rice</td></tr>
<tr><td><span title='2020-01-22 22:12:34 +0100'>2020-01-22</span></td><td><a href='/guix/commit/gnu/packages/spice.scm?id=4bd428a7ce382f623784a3ff8186aadc3cebca91'>gnu: Replace uses of 'libjpeg' with 'libjpeg-turbo'.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2020-01-12 22:23:27 +0100'>2020-01-12</span></td><td><a href='/guix/commit/gnu/packages/spice.scm?id=20eb3b7e747b25f5d2c85167158353cc74e09e41'>gnu: spice: Fix test failure on armhf-linux.</a><span class='msg-avail'>...</span></td><td>Marius Bakke</td></tr>
<tr><td><span title='2019-11-19 09:25:12 +0200'>2019-11-19</span></td><td><a href='/guix/commit/gnu/packages/spice.scm?id=10e73bbc5e2a3f62dc07c5c94309c5105c435dc6'>gnu: spice-gtk: Build with vala support.</a><span class='msg-avail'>...</span></td><td>Efraim Flashner</td></tr>