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, 240 deletions

diff --git a/third_party/nix/src/libstore/builtins/buildenv.cc b/third_party/nix/src/libstore/builtins/buildenv.cc
deleted file mode 100644
index 433082a0f9de..000000000000
--- a/third_party/nix/src/libstore/builtins/buildenv.cc
+++ /dev/null
@@ -1,240 +0,0 @@
-#include <algorithm>
-
-#include <absl/strings/match.h>
-#include <absl/strings/str_split.h>
-#include <fcntl.h>
-#include <glog/logging.h>
-#include <sys/stat.h>
-#include <sys/types.h>
-
-#include "libstore/builtins.hh"
-
-namespace nix {
-
-typedef std::map<Path, int> Priorities;
-
-// FIXME: change into local variables.
-
-static Priorities priorities;
-
-static unsigned long symlinks;
-
-/* For each activated package, create symlinks */
-static void createLinks(const Path& srcDir, const Path& dstDir, int priority) {
-  DirEntries srcFiles;
-
-  try {
-    srcFiles = readDirectory(srcDir);
-  } catch (SysError& e) {
-    if (e.errNo == ENOTDIR) {
-      LOG(ERROR) << "warning: not including '" << srcDir
-                 << "' in the user environment because it's not a directory";
-      return;
-    }
-    throw;
-  }
-
-  for (const auto& ent : srcFiles) {
-    if (ent.name[0] == '.') { /* not matched by glob */
-      continue;
-    }
-    auto srcFile = srcDir + "/" + ent.name;
-    auto dstFile = dstDir + "/" + ent.name;
-
-    struct stat srcSt;
-    try {
-      if (stat(srcFile.c_str(), &srcSt) == -1) {
-        throw SysError("getting status of '%1%'", srcFile);
-      }
-    } catch (SysError& e) {
-      if (e.errNo == ENOENT || e.errNo == ENOTDIR) {
-        LOG(ERROR) << "warning: skipping dangling symlink '" << dstFile << "'";
-        continue;
-      }
-      throw;
-    }
-
-    /* The files below are special-cased to that they don't show up
-     * in user profiles, either because they are useless, or
-     * because they would cauase pointless collisions (e.g., each
-     * Python package brings its own
-     * `$out/lib/pythonX.Y/site-packages/easy-install.pth'.)
-     */
-    if (absl::EndsWith(srcFile, "/propagated-build-inputs") ||
-        absl::EndsWith(srcFile, "/nix-support") ||
-        absl::EndsWith(srcFile, "/perllocal.pod") ||
-        absl::EndsWith(srcFile, "/info/dir") ||
-        absl::EndsWith(srcFile, "/log")) {
-      continue;
-
-    } else if (S_ISDIR(srcSt.st_mode)) {
-      struct stat dstSt;
-      auto res = lstat(dstFile.c_str(), &dstSt);
-      if (res == 0) {
-        if (S_ISDIR(dstSt.st_mode)) {
-          createLinks(srcFile, dstFile, priority);
-          continue;
-        } else if (S_ISLNK(dstSt.st_mode)) {
-          auto target = canonPath(dstFile, true);
-          if (!S_ISDIR(lstat(target).st_mode)) {
-            throw Error("collision between '%1%' and non-directory '%2%'",
-                        srcFile, target);
-          }
-          if (unlink(dstFile.c_str()) == -1) {
-            throw SysError(format("unlinking '%1%'") % dstFile);
-          }
-          if (mkdir(dstFile.c_str(), 0755) == -1) {
-            throw SysError(format("creating directory '%1%'"));
-          }
-          createLinks(target, dstFile, priorities[dstFile]);
-          createLinks(srcFile, dstFile, priority);
-          continue;
-        }
-      } else if (errno != ENOENT) {
-        throw SysError(format("getting status of '%1%'") % dstFile);
-      }
-    }
-
-    else {
-      struct stat dstSt;
-      auto res = lstat(dstFile.c_str(), &dstSt);
-      if (res == 0) {
-        if (S_ISLNK(dstSt.st_mode)) {
-          auto prevPriority = priorities[dstFile];
-          if (prevPriority == priority) {
-            throw Error(
-                "packages '%1%' and '%2%' have the same priority %3%; "
-                "use 'nix-env --set-flag priority NUMBER INSTALLED_PKGNAME' "
-                "to change the priority of one of the conflicting packages"
-                " (0 being the highest priority)",
-                srcFile, readLink(dstFile), priority);
-          }
-          if (prevPriority < priority) {
-            continue;
-          }
-          if (unlink(dstFile.c_str()) == -1) {
-            throw SysError(format("unlinking '%1%'") % dstFile);
-          }
-        } else if (S_ISDIR(dstSt.st_mode)) {
-          throw Error(
-              "collision between non-directory '%1%' and directory '%2%'",
-              srcFile, dstFile);
-        }
-      } else if (errno != ENOENT) {
-        throw SysError(format("getting status of '%1%'") % dstFile);
-      }
-    }
-
-    createSymlink(srcFile, dstFile);
-    priorities[dstFile] = priority;
-    symlinks++;
-  }
-}
-
-using FileProp = std::set<Path>;
-
-static FileProp done;
-static FileProp postponed = FileProp{};
-
-static Path out;
-
-static void addPkg(const Path& pkgDir, int priority) {
-  if (done.count(pkgDir)) {
-    return;
-  }
-  done.insert(pkgDir);
-  createLinks(pkgDir, out, priority);
-
-  try {
-    for (auto p : absl::StrSplit(
-             readFile(pkgDir + "/nix-support/propagated-user-env-packages"),
-             absl::ByAnyChar(" \n"), absl::SkipEmpty())) {
-      auto pkg = std::string(p);
-      if (!done.count(pkg)) {
-        postponed.insert(pkg);
-      }
-    }
-  } catch (SysError& e) {
-    if (e.errNo != ENOENT && e.errNo != ENOTDIR) {
-      throw;
-    }
-  }
-}
-
-struct Package {
-  Path path;
-  bool active;
-  int priority;
-  Package(Path path, bool active, int priority)
-      : path{path}, active{active}, priority{priority} {}
-};
-
-using Packages = std::vector<Package>;
-
-void builtinBuildenv(const BasicDerivation& drv) {
-  auto getAttr = [&](const std::string& name) {
-    auto i = drv.env.find(name);
-    if (i == drv.env.end()) {
-      throw Error("attribute '%s' missing", name);
-    }
-    return i->second;
-  };
-
-  out = getAttr("out");
-  createDirs(out);
-
-  /* Convert the stuff we get from the environment back into a
-   * coherent data type. */
-  Packages pkgs;
-  Strings derivations = absl::StrSplit(
-      getAttr("derivations"), absl::ByAnyChar(" \t\n\r"), absl::SkipEmpty());
-  while (!derivations.empty()) {
-    /* !!! We're trusting the caller to structure derivations env var correctly
-     */
-    auto active = derivations.front();
-    derivations.pop_front();
-    auto priority = stoi(derivations.front());
-    derivations.pop_front();
-    auto outputs = stoi(derivations.front());
-    derivations.pop_front();
-    for (auto n = 0; n < outputs; n++) {
-      auto path = derivations.front();
-      derivations.pop_front();
-      pkgs.emplace_back(path, active != "false", priority);
-    }
-  }
-
-  /* Symlink to the packages that have been installed explicitly by the
-   * user. Process in priority order to reduce unnecessary
-   * symlink/unlink steps.
-   */
-  std::sort(pkgs.begin(), pkgs.end(), [](const Package& a, const Package& b) {
-    return a.priority < b.priority ||
-           (a.priority == b.priority && a.path < b.path);
-  });
-  for (const auto& pkg : pkgs) {
-    if (pkg.active) {
-      addPkg(pkg.path, pkg.priority);
-    }
-  }
-
-  /* Symlink to the packages that have been "propagated" by packages
-   * installed by the user (i.e., package X declares that it wants Y
-   * installed as well). We do these later because they have a lower
-   * priority in case of collisions.
-   */
-  auto priorityCounter = 1000;
-  while (!postponed.empty()) {
-    auto pkgDirs = postponed;
-    postponed = FileProp{};
-    for (const auto& pkgDir : pkgDirs) {
-      addPkg(pkgDir, priorityCounter++);
-    }
-  }
-
-  LOG(INFO) << "created " << symlinks << " symlinks in user environment";
-
-  createSymlink(getAttr("manifest"), out + "/manifest.nix");
-}
-
-}  // namespace nix