/* 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[] =
      {
	"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.nixLibexecDir + "/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;
}

}
class='list nowrap'><tr class='nohover'><th class='left'>Age</th><th class='left'>Commit message (<a href='/guix/log/gnu/build/linux-initrd.scm?id=9f1448b74ac3eaeb493645e8c3cc3b51246571da&amp;showmsg=1'>Expand</a>)</th><th class='left'>Author</th></tr>
<tr><td><span title='2018-11-21 23:26:59 +0100'>2018-11-21</span></td><td><a href='/guix/commit/gnu/build/linux-initrd.scm?id=d422cbb3d6a1cc7e4553a2335b113475a05d68ad'>linux-initrd: 'expression-&gt;initrd' returns the complete file name.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2018-11-07 16:06:42 +0100'>2018-11-07</span></td><td><a href='/guix/commit/gnu/build/linux-initrd.scm?id=970c9993f124789cb181f399d4981cdcf5d3fc26'>linux-initrd: Make sure 'build-initrd' can delete files.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2015-09-09 23:27:10 +0200'>2015-09-09</span></td><td><a href='/guix/commit/gnu/build/linux-initrd.scm?id=0334ef2ab06952df5c6a7582781d16d807e09ea7'>linux-initrd: Compress cpio archives deterministically.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2015-06-24 18:05:03 +0200'>2015-06-24</span></td><td><a href='/guix/commit/gnu/build/linux-initrd.scm?id=eae5b3fff54e6f0a38d03d01187142accbed1eb8'>linux-initrd: Produce cpio archives with zeroed timestamps, etc.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2015-06-24 18:05:03 +0200'>2015-06-24</span></td><td><a href='/guix/commit/gnu/build/linux-initrd.scm?id=583323ca1d1af5462f1b45f4be50f96bc8f1e46b'>linux-initrd: Populate cpio archives in a deterministic order.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>
<tr><td><span title='2015-06-24 18:05:03 +0200'>2015-06-24</span></td><td><a href='/guix/commit/gnu/build/linux-initrd.scm?id=e8277f90c88be9d65b948c299620fd9d6d9b28ae'>linux-initrd: Use (guix cpio) instead of GNU cpio.</a><span class='msg-avail'>...</span></td><td>Ludovic Courtès</td></tr>