From d127f9bd0e7b9b2e0df2de8a2227f77c0907468d Mon Sep 17 00:00:00 2001 From: Vincent Ambo Date: Wed, 18 May 2022 17:39:39 +0200 Subject: chore(3p/nix): unvendor tvix 0.1 Nothing is using this now, and we'll likely never pick this up again, but we learned a lot in the process. Every now and then this breaks in some bizarre way on channel bumps and it's just a waste of time to maintain that. Change-Id: Idcf2f5acd4ca7070ce18d7149cbfc0d967dc0a44 Reviewed-on: https://cl.tvl.fyi/c/depot/+/5632 Tested-by: BuildkiteCI Reviewed-by: sterni Reviewed-by: lukegb Autosubmit: tazjin --- third_party/nix/src/libstore/profiles.cc | 252 ------------------------------- 1 file changed, 252 deletions(-) delete mode 100644 third_party/nix/src/libstore/profiles.cc (limited to 'third_party/nix/src/libstore/profiles.cc') diff --git a/third_party/nix/src/libstore/profiles.cc b/third_party/nix/src/libstore/profiles.cc deleted file mode 100644 index 0d44c60cc4e9..000000000000 --- a/third_party/nix/src/libstore/profiles.cc +++ /dev/null @@ -1,252 +0,0 @@ -#include "libstore/profiles.hh" - -#include -#include - -#include -#include -#include -#include -#include -#include -#include - -#include "libstore/store-api.hh" -#include "libutil/util.hh" - -namespace nix { - -static bool cmpGensByNumber(const Generation& a, const Generation& b) { - return a.number < b.number; -} - -// Parse a generation out of the format -// `--link'. -static int parseName(absl::string_view profileName, absl::string_view name) { - // Consume the `-' prefix and and `-link' suffix. - if (!(absl::ConsumePrefix(&name, profileName) && - absl::ConsumePrefix(&name, "-") && - absl::ConsumeSuffix(&name, "-link"))) { - return -1; - } - - int n; - if (!absl::SimpleAtoi(name, &n) || n < 0) { - return -1; - } - - return n; -} - -Generations findGenerations(const Path& profile, int& curGen) { - Generations gens; - - Path profileDir = dirOf(profile); - std::string profileName = baseNameOf(profile); - - for (auto& i : readDirectory(profileDir)) { - int n; - if ((n = parseName(profileName, i.name)) != -1) { - Generation gen; - gen.path = profileDir + "/" + i.name; - gen.number = n; - struct stat st; - if (lstat(gen.path.c_str(), &st) != 0) { - throw SysError(format("statting '%1%'") % gen.path); - } - gen.creationTime = st.st_mtime; - gens.push_back(gen); - } - } - - gens.sort(cmpGensByNumber); - - curGen = pathExists(profile) ? parseName(profileName, readLink(profile)) : -1; - - return gens; -} - -static void makeName(const Path& profile, unsigned int num, Path& outLink) { - Path prefix = (format("%1%-%2%") % profile % num).str(); - outLink = prefix + "-link"; -} - -Path createGeneration(const ref& store, const Path& profile, - const Path& outPath) { - /* The new generation number should be higher than old the - previous ones. */ - int dummy; - Generations gens = findGenerations(profile, dummy); - - unsigned int num; - if (!gens.empty()) { - Generation last = gens.back(); - - if (readLink(last.path) == outPath) { - /* We only create a new generation symlink if it differs - from the last one. - - This helps keeping gratuitous installs/rebuilds from piling - up uncontrolled numbers of generations, cluttering up the - UI like grub. */ - return last.path; - } - - num = gens.back().number; - } else { - num = 0; - } - - /* Create the new generation. Note that addPermRoot() blocks if - the garbage collector is running to prevent the stuff we've - built from moving from the temporary roots (which the GC knows) - to the permanent roots (of which the GC would have a stale - view). If we didn't do it this way, the GC might remove the - user environment etc. we've just built. */ - Path generation; - makeName(profile, num + 1, generation); - store->addPermRoot(outPath, generation, false, true); - - return generation; -} - -static void removeFile(const Path& path) { - if (remove(path.c_str()) == -1) { - throw SysError(format("cannot unlink '%1%'") % path); - } -} - -void deleteGeneration(const Path& profile, unsigned int gen) { - Path generation; - makeName(profile, gen, generation); - removeFile(generation); -} - -static void deleteGeneration2(const Path& profile, unsigned int gen, - bool dryRun) { - if (dryRun) { - LOG(INFO) << "would remove generation " << gen; - } else { - LOG(INFO) << "removing generation " << gen; - deleteGeneration(profile, gen); - } -} - -void deleteGenerations(const Path& profile, - const std::set& gensToDelete, - bool dryRun) { - PathLocks lock; - lockProfile(lock, profile); - - int curGen; - Generations gens = findGenerations(profile, curGen); - - if (gensToDelete.find(curGen) != gensToDelete.end()) { - throw Error(format("cannot delete current generation of profile %1%'") % - profile); - } - - for (auto& i : gens) { - if (gensToDelete.find(i.number) == gensToDelete.end()) { - continue; - } - deleteGeneration2(profile, i.number, dryRun); - } -} - -void deleteGenerationsGreaterThan(const Path& profile, int max, bool dryRun) { - PathLocks lock; - lockProfile(lock, profile); - - int curGen; - bool fromCurGen = false; - Generations gens = findGenerations(profile, curGen); - for (auto i = gens.rbegin(); i != gens.rend(); ++i) { - if (i->number == curGen) { - fromCurGen = true; - max--; - continue; - } - if (fromCurGen) { - if (max != 0) { - max--; - continue; - } - deleteGeneration2(profile, i->number, dryRun); - } - } -} - -void deleteOldGenerations(const Path& profile, bool dryRun) { - PathLocks lock; - lockProfile(lock, profile); - - int curGen; - Generations gens = findGenerations(profile, curGen); - - for (auto& i : gens) { - if (i.number != curGen) { - deleteGeneration2(profile, i.number, dryRun); - } - } -} - -void deleteGenerationsOlderThan(const Path& profile, time_t t, bool dryRun) { - PathLocks lock; - lockProfile(lock, profile); - - int curGen; - Generations gens = findGenerations(profile, curGen); - - bool canDelete = false; - for (auto i = gens.rbegin(); i != gens.rend(); ++i) { - if (canDelete) { - assert(i->creationTime < t); - if (i->number != curGen) { - deleteGeneration2(profile, i->number, dryRun); - } - } else if (i->creationTime < t) { - /* We may now start deleting generations, but we don't - delete this generation yet, because this generation was - still the one that was active at the requested point in - time. */ - canDelete = true; - } - } -} - -void deleteGenerationsOlderThan(const Path& profile, - const std::string& timeSpec, bool dryRun) { - time_t curTime = time(nullptr); - std::string strDays = std::string(timeSpec, 0, timeSpec.size() - 1); - int days; - - if (!absl::SimpleAtoi(strDays, &days) || days < 1) { - throw Error(format("invalid number of days specifier '%1%'") % timeSpec); - } - - time_t oldTime = curTime - days * 24 * 3600; - - deleteGenerationsOlderThan(profile, oldTime, dryRun); -} - -void switchLink(const Path& link, Path target) { - /* Hacky. */ - if (dirOf(target) == dirOf(link)) { - target = baseNameOf(target); - } - - replaceSymlink(target, link); -} - -void lockProfile(PathLocks& lock, const Path& profile) { - lock.lockPaths({profile}, - (format("waiting for lock on profile '%1%'") % profile).str()); - lock.setDeletion(true); -} - -std::string optimisticLockProfile(const Path& profile) { - return pathExists(profile) ? readLink(profile) : ""; -} - -} // namespace nix -- cgit 1.4.1