88 lines
2.4 KiB
C++
88 lines
2.4 KiB
C++
#include "hash.hh"
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#include "shared.hh"
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#include "globals.hh"
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#include <iostream>
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using namespace nix;
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std::string gen = "";
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bool dryRun = false;
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void runProgramSimple(Path program, const Strings & args)
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{
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checkInterrupt();
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/* Fork. */
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Pid pid = startProcess([&]() {
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Strings args_(args);
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args_.push_front(program);
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auto cargs = stringsToCharPtrs(args_);
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execv(program.c_str(), (char * *) &cargs[0]);
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throw SysError(format("executing ‘%1%’") % program);
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});
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pid.wait(true);
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}
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/* If `-d' was specified, remove all old generations of all profiles.
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* Of course, this makes rollbacks to before this point in time
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* impossible. */
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void removeOldGenerations(std::string dir)
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{
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for (auto & i : readDirectory(dir)) {
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checkInterrupt();
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auto path = dir + "/" + i.name;
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auto type = getFileType(path);
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if (type == DT_LNK) {
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auto link = readLink(path);
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if (link.find("link") != string::npos) {
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printMsg(lvlInfo, format("removing old generations of profile %1%") % path);
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runProgramSimple(settings.nixBinDir + "/nix-env", Strings{"-p", path, "--delete-generations", gen, dryRun ? "--dry-run" : ""});
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}
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} else if (type == DT_DIR) {
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removeOldGenerations(path);
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}
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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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bool removeOld = false;
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Strings extraArgs;
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return handleExceptions(argv[0], [&]() {
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initNix();
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parseCmdLine(argc, argv, [&](Strings::iterator & arg, const Strings::iterator & end) {
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if (*arg == "--help")
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showManPage("nix-collect-garbage");
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else if (*arg == "--version")
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printVersion("nix-collect-garbage");
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else if (*arg == "--delete-old" || *arg == "-d") removeOld = true;
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else if (*arg == "--delete-older-than") {
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removeOld = true;
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gen = getArg(*arg, arg, end);
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}
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else if (*arg == "--dry-run") dryRun = true;
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else
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extraArgs.push_back(*arg);
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return true;
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});
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auto profilesDir = settings.nixStateDir + "/profiles";
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if (removeOld) removeOldGenerations(profilesDir);
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// Run the actual garbage collector.
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if (!dryRun) runProgramSimple(settings.nixBinDir + "/nix-store", Strings{"--gc"});
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});
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}
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