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https://github.com/NixOS/nix.git
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0e35cd6f3e
* It is tough to contribute to a project that doesn't use a formatter, * It is extra hard to contribute to a project which has configured the formatter, but ignores it for some files * Code formatting makes it harder to hide obscure / weird bugs by accident or on purpose, Let's rip the bandaid off? Note that PRs currently in flight should be able to be merged relatively easily by applying `clang-format` to their tip prior to merge. Co-authored-by: Graham Christensen <graham@grahamc.com>
114 lines
3.6 KiB
C++
114 lines
3.6 KiB
C++
#include "nix/util/file-system.hh"
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#include "nix/util/signals.hh"
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#include "nix/store/store-open.hh"
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#include "nix/store/store-cast.hh"
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#include "nix/store/gc-store.hh"
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#include "nix/store/profiles.hh"
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#include "nix/main/shared.hh"
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#include "nix/store/globals.hh"
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#include "nix/cmd/legacy.hh"
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#include "man-pages.hh"
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#include <iostream>
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#include <cerrno>
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namespace nix::fs {
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using namespace std::filesystem;
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}
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using namespace nix;
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std::string deleteOlderThan;
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bool dryRun = false;
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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::filesystem::path dir)
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{
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if (access(dir.string().c_str(), R_OK) != 0)
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return;
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bool canWrite = access(dir.string().c_str(), W_OK) == 0;
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for (auto & i : DirectoryIterator{dir}) {
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checkInterrupt();
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auto path = i.path().string();
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auto type = i.symlink_status().type();
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if (type == std::filesystem::file_type::symlink && canWrite) {
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std::string link;
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try {
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link = readLink(path);
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} catch (std::filesystem::filesystem_error & e) {
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if (e.code() == std::errc::no_such_file_or_directory)
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continue;
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throw;
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}
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if (link.find("link") != std::string::npos) {
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printInfo("removing old generations of profile %s", path);
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if (deleteOlderThan != "") {
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auto t = parseOlderThanTimeSpec(deleteOlderThan);
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deleteGenerationsOlderThan(path, t, dryRun);
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} else
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deleteOldGenerations(path, dryRun);
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}
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} else if (type == std::filesystem::file_type::directory) {
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removeOldGenerations(path);
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}
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}
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}
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static int main_nix_collect_garbage(int argc, char ** argv)
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{
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{
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bool removeOld = false;
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GCOptions options;
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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")
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removeOld = true;
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else if (*arg == "--delete-older-than") {
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removeOld = true;
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deleteOlderThan = getArg(*arg, arg, end);
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} else if (*arg == "--dry-run")
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dryRun = true;
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else if (*arg == "--max-freed")
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options.maxFreed = std::max(getIntArg<int64_t>(*arg, arg, end, true), (int64_t) 0);
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else
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return false;
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return true;
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});
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if (removeOld) {
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std::set<std::filesystem::path> dirsToClean = {
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profilesDir(),
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std::filesystem::path{settings.nixStateDir} / "profiles",
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std::filesystem::path{getDefaultProfile()}.parent_path(),
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};
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for (auto & dir : dirsToClean)
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removeOldGenerations(dir);
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}
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// Run the actual garbage collector.
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if (!dryRun) {
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auto store = openStore();
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auto & gcStore = require<GcStore>(*store);
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options.action = GCOptions::gcDeleteDead;
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GCResults results;
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PrintFreed freed(true, results);
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gcStore.collectGarbage(options, results);
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}
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return 0;
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}
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}
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static RegisterLegacyCommand r_nix_collect_garbage("nix-collect-garbage", main_nix_collect_garbage);
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