/* 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;
}

}
amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2023-05-18 20:01:32 +0200'>2023-05-18</span></td><td><a href='/guix/commit/tests/style.scm?id=ba5da5125a81307500982517e2f458d57b024668'>style: Add 'arguments' styling rule.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2023-05-04 17:06:43 +0200'>2023-05-04</span></td><td><a href='/guix/commit/tests/style.scm?id=68fa28b3c3f6cca4485575b6dfa418be656443e7'>style: Make 'safe' policy less conservative.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-08-08 11:22:32 +0200'>2022-08-08</span></td><td><a href='/guix/commit/tests/style.scm?id=3eb3901d7f1d4aae134cb64aa703af67c3c27cdf'>style: Adjust test to not emit blank lines.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-08-08 11:22:31 +0200'>2022-08-08</span></td><td><a href='/guix/commit/tests/style.scm?id=5817e222faf46f76fbdb66ba8fd6c8cd643aefb5'>style: Move reader and printer to (guix read-print).</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-07-04 23:38:38 +0200'>2022-07-04</span></td><td><a href='/guix/commit/tests/style.scm?id=8d9291bd2c36810be50ea340cefa481a42c60a2b'>style: For 'let' and similar forms, emit one binding per line.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-06-22 23:42:30 +0200'>2022-06-22</span></td><td><a href='/guix/commit/tests/style.scm?id=2ccbf3a45ccb5b1ac469f3d429faf4c51c56f38a'>style: Keep values next to their keyword.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-04-14 14:48:20 +0200'>2022-04-14</span></td><td><a href='/guix/commit/tests/style.scm?id=c9cded095593783a957ea500160587252d5cadf6'>style: Correctly read dots in pairs and improper lists.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-01-10 14:59:26 +0100'>2022-01-10</span></td><td><a href='/guix/commit/tests/style.scm?id=5d9a5e230189347ba6f5b78a3d74b36a867aa9e6'>style: '-S format' canonicalizes comments.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-01-10 14:59:26 +0100'>2022-01-10</span></td><td><a href='/guix/commit/tests/style.scm?id=c4fe13c294cc1e31dd8a49ce3981f603fb169e0a'>style: Add '--styling' option.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-01-10 14:59:18 +0100'>2022-01-10</span></td><td><a href='/guix/commit/tests/style.scm?id=6f892630ae4726297944fe34b3de4fb608caf66d'>style: Add support for "newline forms".</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-01-10 14:25:59 +0100'>2022-01-10</span></td><td><a href='/guix/commit/tests/style.scm?id=208a7aa17b101083bd9969fec9ca4e2dca37b3af'>style: Allow special forms to be scoped.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2022-01-10 14:25:59 +0100'>2022-01-10</span></td><td><a href='/guix/commit/tests/style.scm?id=97d0055edb9a8b9b59ede254ce8ef1f255558802'>style: Improve pretty printer and add tests.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2021-07-11 00:49:15 +0200'>2021-07-11</span></td><td><a href='/guix/commit/tests/style.scm?id=f23803af2018a148fb088f2516d79c20d6bf95f0'>Add 'guix style'.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>