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author | Leo Famulari <leo@famulari.name> | 2016-11-25 11:20:21 -0500 |
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committer | Leo Famulari <leo@famulari.name> | 2016-11-25 11:20:21 -0500 |
commit | de32aa74b4f7762e887e80047804c42d495ab841 (patch) | |
tree | bc37856ba9036563aa9ca7809ea3e8cefcb670e9 /nix/libstore/builtins.cc | |
parent | d46491779e18cf614caeeb1b4becbd9171c64416 (diff) | |
parent | d66cbd1adc799b08e66cd912822c6220499b4876 (diff) | |
download | guix-patches-de32aa74b4f7762e887e80047804c42d495ab841.tar guix-patches-de32aa74b4f7762e887e80047804c42d495ab841.tar.gz |
Merge branch 'master' into python-build-system
Diffstat (limited to 'nix/libstore/builtins.cc')
-rw-r--r-- | nix/libstore/builtins.cc | 79 |
1 files changed, 79 insertions, 0 deletions
diff --git a/nix/libstore/builtins.cc b/nix/libstore/builtins.cc new file mode 100644 index 0000000000..32af767dc4 --- /dev/null +++ b/nix/libstore/builtins.cc @@ -0,0 +1,79 @@ +/* GNU Guix --- Functional package management for GNU + Copyright (C) 2016 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> + +namespace nix { + +static void builtinDownload(const Derivation &drv, + const std::string &drvPath) +{ + /* 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(), NULL }; + + /* 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; +} + +} |