70 lines
2.0 KiB
C++
70 lines
2.0 KiB
C++
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/* GNU Guix --- Functional package management for GNU
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Copyright (C) 2016 Ludovic Courtès <ludo@gnu.org>
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This file is part of GNU Guix.
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GNU Guix is free software; you can redistribute it and/or modify it
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under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or (at
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your option) any later version.
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GNU Guix is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Guix. If not, see <http://www.gnu.org/licenses/>. */
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#include <builtins.hh>
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#include <util.hh>
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#include <globals.hh>
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#include <unistd.h>
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namespace nix {
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static void builtinDownload(const Derivation &drv,
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const std::string &drvPath)
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{
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/* Invoke 'guix perform-download'. */
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Strings args;
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args.push_back("perform-download");
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args.push_back(drvPath);
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/* Close all other file descriptors. */
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closeMostFDs(set<int>());
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const char *const argv[] = { "download", drvPath.c_str(), NULL };
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/* XXX: Hack our way to use the 'download' script from 'LIBEXECDIR/guix'
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or just 'LIBEXECDIR', depending on whether we're running uninstalled or
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not. */
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const string subdir = getenv("GUIX_UNINSTALLED") != NULL
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? "" : "/guix";
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const string program = settings.nixLibexecDir + subdir + "/download";
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execv(program.c_str(), (char *const *) argv);
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throw SysError(format("failed to run download program '%1%'") % program);
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}
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static const std::map<std::string, derivationBuilder> builtins =
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{
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{ "download", builtinDownload }
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};
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derivationBuilder lookupBuiltinBuilder(const std::string & name)
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{
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if (name.substr(0, 8) == "builtin:")
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{
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auto realName = name.substr(8);
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auto builder = builtins.find(realName);
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return builder == builtins.end() ? NULL : builder->second;
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}
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else
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return NULL;
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}
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}
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