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/nix-channel/nix-channel.cc | 275 ------------------------- 1 file changed, 275 deletions(-) delete mode 100644 third_party/nix/src/nix-channel/nix-channel.cc (limited to 'third_party/nix/src/nix-channel/nix-channel.cc') diff --git a/third_party/nix/src/nix-channel/nix-channel.cc b/third_party/nix/src/nix-channel/nix-channel.cc deleted file mode 100644 index 5cc16d1b4b9a..000000000000 --- a/third_party/nix/src/nix-channel/nix-channel.cc +++ /dev/null @@ -1,275 +0,0 @@ -#include - -#include -#include -#include -#include - -#include "libmain/shared.hh" -#include "libstore/download.hh" -#include "libstore/globals.hh" -#include "libstore/store-api.hh" -#include "nix/legacy.hh" - -using namespace nix; - -typedef std::map Channels; - -static Channels channels; -static Path channelsList; - -// Reads the list of channels. -static void readChannels() { - if (!pathExists(channelsList)) { - return; - } - auto channelsFile = readFile(channelsList); - - std::vector lines = - absl::StrSplit(channelsFile, absl::ByChar('\n'), absl::SkipEmpty()); - - for (auto& line : lines) { - line = absl::StripTrailingAsciiWhitespace(line); - if (std::regex_search(line, std::regex("^\\s*\\#"))) { - continue; - } - std::vector split = - absl::StrSplit(line, absl::ByChar(' '), absl::SkipEmpty()); - auto url = std::regex_replace(split[0], std::regex("/*$"), ""); - auto name = split.size() > 1 ? split[1] : baseNameOf(url); - channels[name] = url; - } -} - -// Writes the list of channels. -static void writeChannels() { - auto channelsFD = AutoCloseFD{open( - channelsList.c_str(), O_WRONLY | O_CLOEXEC | O_CREAT | O_TRUNC, 0644)}; - if (!channelsFD) { - throw SysError(format("opening '%1%' for writing") % channelsList); - } - for (const auto& channel : channels) { - writeFull(channelsFD.get(), channel.second + " " + channel.first + "\n"); - } -} - -// Adds a channel. -static void addChannel(const std::string& url, const std::string& name) { - if (!regex_search(url, std::regex("^(file|http|https)://"))) { - throw Error(format("invalid channel URL '%1%'") % url); - } - if (!regex_search(name, std::regex("^[a-zA-Z0-9_][a-zA-Z0-9_\\.-]*$"))) { - throw Error(format("invalid channel identifier '%1%'") % name); - } - readChannels(); - channels[name] = url; - writeChannels(); -} - -static Path profile; - -// Remove a channel. -static void removeChannel(const std::string& name) { - readChannels(); - channels.erase(name); - writeChannels(); - - runProgram(settings.nixBinDir + "/nix-env", true, - {"--profile", profile, "--uninstall", name}); -} - -static Path nixDefExpr; - -// Fetch Nix expressions and binary cache URLs from the subscribed channels. -static void update(const StringSet& channelNames) { - readChannels(); - - auto store = openStore(); - - // Download each channel. - Strings exprs; - for (const auto& channel : channels) { - auto name = channel.first; - auto url = channel.second; - if (!(channelNames.empty() || (channelNames.count(name) != 0u))) { - continue; - } - - // We want to download the url to a file to see if it's a tarball while also - // checking if we got redirected in the process, so that we can grab the - // various parts of a nix channel definition from a consistent location if - // the redirect changes mid-download. - CachedDownloadRequest request(url); - request.ttl = 0; - auto dl = getDownloader(); - auto result = dl->downloadCached(store, request); - auto filename = result.path; - url = absl::StripTrailingAsciiWhitespace(result.effectiveUri); - - // If the URL contains a version number, append it to the name - // attribute (so that "nix-env -q" on the channels profile - // shows something useful). - auto cname = name; - std::smatch match; - auto urlBase = baseNameOf(url); - if (std::regex_search(urlBase, match, std::regex("(-\\d.*)$"))) { - cname = cname + std::string(match[1]); - } - - std::string extraAttrs; - - bool unpacked = false; - if (std::regex_search(filename, std::regex("\\.tar\\.(gz|bz2|xz)$"))) { - runProgram(settings.nixBinDir + "/nix-build", false, - {"--no-out-link", "--expr", - "import " - "{ name = \"" + - cname + "\"; channelName = \"" + name + - "\"; src = builtins.storePath \"" + filename + "\"; }"}); - unpacked = true; - } - - if (!unpacked) { - // Download the channel tarball. - try { - filename = dl->downloadCached( - store, CachedDownloadRequest(url + "/nixexprs.tar.xz")) - .path; - } catch (DownloadError& e) { - filename = - dl->downloadCached(store, - CachedDownloadRequest(url + "/nixexprs.tar.bz2")) - .path; - } - filename = absl::StripTrailingAsciiWhitespace(filename); - } - - // Regardless of where it came from, add the expression representing this - // channel to accumulated expression - exprs.push_back("f: f { name = \"" + cname + "\"; channelName = \"" + name + - "\"; src = builtins.storePath \"" + filename + "\"; " + - extraAttrs + " }"); - } - - // Unpack the channel tarballs into the Nix store and install them - // into the channels profile. - std::cerr << "unpacking channels...\n"; - Strings envArgs{"--profile", profile, - "--file", "", - "--install", "--from-expression"}; - for (auto& expr : exprs) { - envArgs.push_back(std::move(expr)); - } - envArgs.push_back("--quiet"); - runProgram(settings.nixBinDir + "/nix-env", false, envArgs); - - // Make the channels appear in nix-env. - struct stat st; - if (lstat(nixDefExpr.c_str(), &st) == 0) { - if (S_ISLNK(st.st_mode)) { - // old-skool ~/.nix-defexpr - if (unlink(nixDefExpr.c_str()) == -1) { - throw SysError(format("unlinking %1%") % nixDefExpr); - } - } - } else if (errno != ENOENT) { - throw SysError(format("getting status of %1%") % nixDefExpr); - } - createDirs(nixDefExpr); - auto channelLink = nixDefExpr + "/channels"; - replaceSymlink(profile, channelLink); -} - -static int _main(int argc, char** argv) { - { - // Figure out the name of the `.nix-channels' file to use - auto home = getHome(); - channelsList = home + "/.nix-channels"; - nixDefExpr = home + "/.nix-defexpr"; - - // Figure out the name of the channels profile. - profile = fmt("%s/profiles/per-user/%s/channels", settings.nixStateDir, - getUserName()); - - enum { cNone, cAdd, cRemove, cList, cUpdate, cRollback } cmd = cNone; - std::vector args; - parseCmdLine(argc, argv, - [&](Strings::iterator& arg, const Strings::iterator& end) { - if (*arg == "--help") { - showManPage("nix-channel"); - } else if (*arg == "--version") { - printVersion("nix-channel"); - } else if (*arg == "--add") { - cmd = cAdd; - } else if (*arg == "--remove") { - cmd = cRemove; - } else if (*arg == "--list") { - cmd = cList; - } else if (*arg == "--update") { - cmd = cUpdate; - } else if (*arg == "--rollback") { - cmd = cRollback; - } else { - args.push_back(std::move(*arg)); - } - return true; - }); - - switch (cmd) { - case cNone: - throw UsageError("no command specified"); - case cAdd: - if (args.empty() || args.size() > 2) { - throw UsageError("'--add' requires one or two arguments"); - } - { - auto url = args[0]; - std::string name; - if (args.size() == 2) { - name = args[1]; - } else { - name = baseNameOf(url); - name = std::regex_replace(name, std::regex("-unstable$"), ""); - name = std::regex_replace(name, std::regex("-stable$"), ""); - } - addChannel(url, name); - } - break; - case cRemove: - if (args.size() != 1) { - throw UsageError("'--remove' requires one argument"); - } - removeChannel(args[0]); - break; - case cList: - if (!args.empty()) { - throw UsageError("'--list' expects no arguments"); - } - readChannels(); - for (const auto& channel : channels) { - std::cout << channel.first << ' ' << channel.second << '\n'; - } - break; - case cUpdate: - update(StringSet(args.begin(), args.end())); - break; - case cRollback: - if (args.size() > 1) { - throw UsageError("'--rollback' has at most one argument"); - } - Strings envArgs{"--profile", profile}; - if (args.size() == 1) { - envArgs.push_back("--switch-generation"); - envArgs.push_back(args[0]); - } else { - envArgs.push_back("--rollback"); - } - runProgram(settings.nixBinDir + "/nix-env", false, envArgs); - break; - } - - return 0; - } -} - -static RegisterLegacyCommand s1("nix-channel", _main); -- cgit 1.4.1