forked from lix-project/lix
215 lines
6.2 KiB
C++
215 lines
6.2 KiB
C++
#include <algorithm>
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#include "command.hh"
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#include "common-args.hh"
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#include "eval.hh"
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#include "globals.hh"
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#include "legacy.hh"
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#include "shared.hh"
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#include "store-api.hh"
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#include "progress-bar.hh"
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#include "filetransfer.hh"
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#include "finally.hh"
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#include <sys/types.h>
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#include <sys/socket.h>
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#include <ifaddrs.h>
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#include <netdb.h>
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#include <netinet/in.h>
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extern std::string chrootHelperName;
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void chrootHelper(int argc, char * * argv);
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namespace nix {
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/* Check if we have a non-loopback/link-local network interface. */
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static bool haveInternet()
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{
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struct ifaddrs * addrs;
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if (getifaddrs(&addrs))
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return true;
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Finally free([&]() { freeifaddrs(addrs); });
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for (auto i = addrs; i; i = i->ifa_next) {
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if (!i->ifa_addr) continue;
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if (i->ifa_addr->sa_family == AF_INET) {
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if (ntohl(((sockaddr_in *) i->ifa_addr)->sin_addr.s_addr) != INADDR_LOOPBACK) {
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return true;
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}
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} else if (i->ifa_addr->sa_family == AF_INET6) {
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if (!IN6_IS_ADDR_LOOPBACK(&((sockaddr_in6 *) i->ifa_addr)->sin6_addr) &&
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!IN6_IS_ADDR_LINKLOCAL(&((sockaddr_in6 *) i->ifa_addr)->sin6_addr))
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return true;
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}
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}
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return false;
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}
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std::string programPath;
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struct NixArgs : virtual MultiCommand, virtual MixCommonArgs
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{
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bool printBuildLogs = false;
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bool useNet = true;
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bool refresh = false;
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NixArgs() : MultiCommand(*RegisterCommand::commands), MixCommonArgs("nix")
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{
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categories.clear();
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categories[Command::catDefault] = "Main commands";
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categories[catSecondary] = "Infrequently used commands";
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categories[catUtility] = "Utility/scripting commands";
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categories[catNixInstallation] = "Commands for upgrading or troubleshooting your Nix installation";
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addFlag({
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.longName = "help",
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.description = "show usage information",
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.handler = {[&]() { showHelpAndExit(); }},
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});
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addFlag({
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.longName = "help-config",
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.description = "show configuration options",
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.handler = {[&]() {
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std::cout << "The following configuration options are available:\n\n";
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Table2 tbl;
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std::map<std::string, Config::SettingInfo> settings;
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globalConfig.getSettings(settings);
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for (const auto & s : settings)
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tbl.emplace_back(s.first, s.second.description);
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printTable(std::cout, tbl);
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throw Exit();
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}},
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});
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addFlag({
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.longName = "print-build-logs",
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.shortName = 'L',
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.description = "print full build logs on stderr",
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.handler = {&printBuildLogs, true},
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});
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addFlag({
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.longName = "version",
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.description = "show version information",
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.handler = {[&]() { printVersion(programName); }},
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});
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addFlag({
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.longName = "no-net",
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.description = "disable substituters and consider all previously downloaded files up-to-date",
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.handler = {[&]() { useNet = false; }},
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});
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addFlag({
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.longName = "refresh",
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.description = "consider all previously downloaded files out-of-date",
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.handler = {[&]() { refresh = true; }},
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});
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}
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void printFlags(std::ostream & out) override
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{
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Args::printFlags(out);
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std::cout <<
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"\n"
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"In addition, most configuration settings can be overriden using '--" ANSI_ITALIC "name value" ANSI_NORMAL "'.\n"
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"Boolean settings can be overriden using '--" ANSI_ITALIC "name" ANSI_NORMAL "' or '--no-" ANSI_ITALIC "name" ANSI_NORMAL "'. See 'nix\n"
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"--help-config' for a list of configuration settings.\n";
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}
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void printHelp(const string & programName, std::ostream & out) override
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{
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MultiCommand::printHelp(programName, out);
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#if 0
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out << "\nFor full documentation, run 'man " << programName << "' or 'man " << programName << "-" ANSI_ITALIC "COMMAND" ANSI_NORMAL "'.\n";
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#endif
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std::cout << "\nNote: this program is " ANSI_RED "EXPERIMENTAL" ANSI_NORMAL " and subject to change.\n";
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}
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void showHelpAndExit()
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{
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printHelp(programName, std::cout);
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throw Exit();
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}
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};
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void mainWrapped(int argc, char * * argv)
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{
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/* The chroot helper needs to be run before any threads have been
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started. */
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if (argc > 0 && argv[0] == chrootHelperName) {
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chrootHelper(argc, argv);
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return;
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}
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initNix();
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initGC();
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programPath = argv[0];
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auto programName = std::string(baseNameOf(programPath));
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{
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auto legacy = (*RegisterLegacyCommand::commands)[programName];
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if (legacy) return legacy(argc, argv);
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}
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verbosity = lvlWarn;
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settings.verboseBuild = false;
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NixArgs args;
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args.parseCmdline(argvToStrings(argc, argv));
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initPlugins();
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if (!args.command) args.showHelpAndExit();
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if (args.command->first != "repl"
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&& args.command->first != "doctor"
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&& args.command->first != "upgrade-nix")
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settings.requireExperimentalFeature("nix-command");
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Finally f([]() { stopProgressBar(); });
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startProgressBar(args.printBuildLogs);
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if (args.useNet && !haveInternet()) {
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warn("you don't have Internet access; disabling some network-dependent features");
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args.useNet = false;
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}
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if (!args.useNet) {
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// FIXME: should check for command line overrides only.
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if (!settings.useSubstitutes.overriden)
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settings.useSubstitutes = false;
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if (!settings.tarballTtl.overriden)
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settings.tarballTtl = std::numeric_limits<unsigned int>::max();
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if (!fileTransferSettings.tries.overriden)
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fileTransferSettings.tries = 0;
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if (!fileTransferSettings.connectTimeout.overriden)
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fileTransferSettings.connectTimeout = 1;
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}
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if (args.refresh)
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settings.tarballTtl = 0;
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args.command->second->prepare();
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args.command->second->run();
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}
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}
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int main(int argc, char * * argv)
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{
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return nix::handleExceptions(argv[0], [&]() {
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nix::mainWrapped(argc, argv);
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});
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}
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