chore(3p/nix): unvendor tvix 0.1 r/4098

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 <sternenseemann@systemli.org>
Reviewed-by: lukegb <lukegb@tvl.fyi>
Autosubmit: tazjin <tazjin@tvl.su>

1 files changed, 0 insertions, 277 deletions

diff --git a/third_party/nix/src/libexpr/primops/fetchGit.cc b/third_party/nix/src/libexpr/primops/fetchGit.cc
deleted file mode 100644
index da4d683401d7..000000000000
--- a/third_party/nix/src/libexpr/primops/fetchGit.cc
+++ /dev/null
@@ -1,277 +0,0 @@
-#include <nlohmann/json.hpp>
-#include <regex>
-
-#include <absl/strings/ascii.h>
-#include <absl/strings/match.h>
-#include <absl/strings/str_split.h>
-#include <glog/logging.h>
-#include <sys/time.h>
-
-#include "libexpr/eval-inline.hh"
-#include "libexpr/primops.hh"
-#include "libstore/download.hh"
-#include "libstore/pathlocks.hh"
-#include "libstore/store-api.hh"
-#include "libutil/hash.hh"
-
-using namespace std::string_literals;
-
-namespace nix {
-
-struct GitInfo {
-  Path storePath;
-  std::string rev;
-  std::string shortRev;
-  uint64_t revCount = 0;
-};
-
-std::regex revRegex("^[0-9a-fA-F]{40}$");
-
-GitInfo exportGit(ref<Store> store, const std::string& uri,
-                  std::optional<std::string> ref, std::string rev,
-                  const std::string& name) {
-  if (evalSettings.pureEval && rev == "") {
-    throw Error("in pure evaluation mode, 'fetchGit' requires a Git revision");
-  }
-
-  if (!ref && rev == "" && absl::StartsWith(uri, "/") &&
-      pathExists(uri + "/.git")) {
-    bool clean = true;
-
-    try {
-      runProgram("git", true,
-                 {"-C", uri, "diff-index", "--quiet", "HEAD", "--"});
-    } catch (ExecError& e) {
-      if (!WIFEXITED(e.status) || WEXITSTATUS(e.status) != 1) {
-        throw;
-      }
-      clean = false;
-    }
-
-    if (!clean) {
-      /* This is an unclean working tree. So copy all tracked
-         files. */
-
-      GitInfo gitInfo;
-      gitInfo.rev = "0000000000000000000000000000000000000000";
-      gitInfo.shortRev = std::string(gitInfo.rev, 0, 7);
-
-      std::set<std::string> files =
-          absl::StrSplit(runProgram("git", true, {"-C", uri, "ls-files", "-z"}),
-                         absl::ByChar('\0'), absl::SkipEmpty());
-
-      PathFilter filter = [&](const Path& p) -> bool {
-        assert(absl::StartsWith(p, uri));
-        std::string file(p, uri.size() + 1);
-
-        auto st = lstat(p);
-
-        if (S_ISDIR(st.st_mode)) {
-          auto prefix = file + "/";
-          auto i = files.lower_bound(prefix);
-          return i != files.end() && absl::StartsWith(*i, prefix);
-        }
-
-        return files.count(file);
-      };
-
-      gitInfo.storePath =
-          store->addToStore("source", uri, true, htSHA256, filter);
-
-      return gitInfo;
-    }
-
-    // clean working tree, but no ref or rev specified.  Use 'HEAD'.
-    rev = absl::StripTrailingAsciiWhitespace(
-        runProgram("git", true, {"-C", uri, "rev-parse", "HEAD"}));
-    ref = "HEAD"s;
-  }
-
-  if (!ref) {
-    ref = "HEAD"s;
-  }
-
-  if (rev != "" && !std::regex_match(rev, revRegex)) {
-    throw Error("invalid Git revision '%s'", rev);
-  }
-
-  deletePath(getCacheDir() + "/nix/git");
-
-  Path cacheDir = getCacheDir() + "/nix/gitv2/" +
-                  hashString(htSHA256, uri).to_string(Base32, false);
-
-  if (!pathExists(cacheDir)) {
-    createDirs(dirOf(cacheDir));
-    runProgram("git", true, {"init", "--bare", cacheDir});
-  }
-
-  Path localRefFile;
-  if (ref->compare(0, 5, "refs/") == 0) {
-    localRefFile = cacheDir + "/" + *ref;
-  } else {
-    localRefFile = cacheDir + "/refs/heads/" + *ref;
-  }
-
-  bool doFetch;
-  time_t now = time(0);
-  /* If a rev was specified, we need to fetch if it's not in the
-     repo. */
-  if (rev != "") {
-    try {
-      runProgram("git", true, {"-C", cacheDir, "cat-file", "-e", rev});
-      doFetch = false;
-    } catch (ExecError& e) {
-      if (WIFEXITED(e.status)) {
-        doFetch = true;
-      } else {
-        throw;
-      }
-    }
-  } else {
-    /* If the local ref is older than ‘tarball-ttl’ seconds, do a
-       git fetch to update the local ref to the remote ref. */
-    struct stat st;
-    doFetch = stat(localRefFile.c_str(), &st) != 0 ||
-              static_cast<uint64_t>(st.st_mtime) + settings.tarballTtl <=
-                  static_cast<uint64_t>(now);
-  }
-  if (doFetch) {
-    DLOG(INFO) << "fetching Git repository '" << uri << "'";
-
-    // FIXME: git stderr messes up our progress indicator, so
-    // we're using --quiet for now. Should process its stderr.
-    runProgram("git", true,
-               {"-C", cacheDir, "fetch", "--quiet", "--force", "--", uri,
-                fmt("%s:%s", *ref, *ref)});
-
-    struct timeval times[2];
-    times[0].tv_sec = now;
-    times[0].tv_usec = 0;
-    times[1].tv_sec = now;
-    times[1].tv_usec = 0;
-
-    utimes(localRefFile.c_str(), times);
-  }
-
-  // FIXME: check whether rev is an ancestor of ref.
-  GitInfo gitInfo;
-  gitInfo.rev =
-      rev != "" ? rev
-                : absl::StripTrailingAsciiWhitespace(readFile(localRefFile));
-  gitInfo.shortRev = std::string(gitInfo.rev, 0, 7);
-
-  VLOG(2) << "using revision " << gitInfo.rev << " of repo '" << uri << "'";
-
-  std::string storeLinkName =
-      hashString(htSHA512, name + std::string("\0"s) + gitInfo.rev)
-          .to_string(Base32, false);
-  Path storeLink = cacheDir + "/" + storeLinkName + ".link";
-  PathLocks storeLinkLock({storeLink}, fmt("waiting for lock on '%1%'...",
-                                           storeLink));  // FIXME: broken
-
-  try {
-    auto json = nlohmann::json::parse(readFile(storeLink));
-
-    assert(json["name"] == name && json["rev"] == gitInfo.rev);
-
-    gitInfo.storePath = json["storePath"];
-
-    if (store->isValidPath(gitInfo.storePath)) {
-      gitInfo.revCount = json["revCount"];
-      return gitInfo;
-    }
-
-  } catch (SysError& e) {
-    if (e.errNo != ENOENT) {
-      throw;
-    }
-  }
-
-  // FIXME: should pipe this, or find some better way to extract a
-  // revision.
-  auto tar = runProgram("git", true, {"-C", cacheDir, "archive", gitInfo.rev});
-
-  Path tmpDir = createTempDir();
-  AutoDelete delTmpDir(tmpDir, true);
-
-  runProgram("tar", true, {"x", "-C", tmpDir}, tar);
-
-  gitInfo.storePath = store->addToStore(name, tmpDir);
-
-  gitInfo.revCount = std::stoull(runProgram(
-      "git", true, {"-C", cacheDir, "rev-list", "--count", gitInfo.rev}));
-
-  nlohmann::json json;
-  json["storePath"] = gitInfo.storePath;
-  json["uri"] = uri;
-  json["name"] = name;
-  json["rev"] = gitInfo.rev;
-  json["revCount"] = gitInfo.revCount;
-
-  writeFile(storeLink, json.dump());
-
-  return gitInfo;
-}
-
-static void prim_fetchGit(EvalState& state, const Pos& pos, Value** args,
-                          Value& v) {
-  std::string url;
-  std::optional<std::string> ref;
-  std::string rev;
-  std::string name = "source";
-  PathSet context;
-
-  state.forceValue(*args[0]);
-
-  if (args[0]->type == tAttrs) {
-    state.forceAttrs(*args[0], pos);
-
-    for (auto& attr_iter : *args[0]->attrs) {
-      auto& attr = attr_iter.second;
-      std::string n(attr.name);
-      if (n == "url") {
-        url =
-            state.coerceToString(*attr.pos, *attr.value, context, false, false);
-      } else if (n == "ref") {
-        ref = state.forceStringNoCtx(*attr.value, *attr.pos);
-      } else if (n == "rev") {
-        rev = state.forceStringNoCtx(*attr.value, *attr.pos);
-      } else if (n == "name") {
-        name = state.forceStringNoCtx(*attr.value, *attr.pos);
-      } else {
-        throw EvalError("unsupported argument '%s' to 'fetchGit', at %s",
-                        attr.name, *attr.pos);
-      }
-    }
-
-    if (url.empty()) {
-      throw EvalError(format("'url' argument required, at %1%") % pos);
-    }
-
-  } else {
-    url = state.coerceToString(pos, *args[0], context, false, false);
-  }
-
-  // FIXME: git externals probably can be used to bypass the URI
-  // whitelist. Ah well.
-  state.checkURI(url);
-
-  auto gitInfo = exportGit(state.store, url, ref, rev, name);
-
-  state.mkAttrs(v, 8);
-  mkString(*state.allocAttr(v, state.sOutPath), gitInfo.storePath,
-           PathSet({gitInfo.storePath}));
-  mkString(*state.allocAttr(v, state.symbols.Create("rev")), gitInfo.rev);
-  mkString(*state.allocAttr(v, state.symbols.Create("shortRev")),
-           gitInfo.shortRev);
-  mkInt(*state.allocAttr(v, state.symbols.Create("revCount")),
-        gitInfo.revCount);
-
-  if (state.allowedPaths) {
-    state.allowedPaths->insert(state.store->toRealPath(gitInfo.storePath));
-  }
-}
-
-static RegisterPrimOp r("fetchGit", 1, prim_fetchGit);
-
-}  // namespace nix