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, 93 deletions

diff --git a/third_party/nix/src/libutil/xml-writer.cc b/third_party/nix/src/libutil/xml-writer.cc
deleted file mode 100644
index 8274ed769eb4..000000000000
--- a/third_party/nix/src/libutil/xml-writer.cc
+++ /dev/null
@@ -1,93 +0,0 @@
-#include "libutil/xml-writer.hh"
-
-#include <cassert>
-
-namespace nix {
-
-XMLWriter::XMLWriter(bool indent, std::ostream& output)
-    : output(output), indent(indent) {
-  output << "<?xml version='1.0' encoding='utf-8'?>" << std::endl;
-  closed = false;
-}
-
-XMLWriter::~XMLWriter() { close(); }
-
-void XMLWriter::close() {
-  if (closed) {
-    return;
-  }
-  while (!pendingElems.empty()) {
-    closeElement();
-  }
-  closed = true;
-}
-
-void XMLWriter::indent_(size_t depth) {
-  if (!indent) {
-    return;
-  }
-  output << std::string(depth * 2, ' ');
-}
-
-void XMLWriter::openElement(const std::string& name, const XMLAttrs& attrs) {
-  assert(!closed);
-  indent_(pendingElems.size());
-  output << "<" << name;
-  writeAttrs(attrs);
-  output << ">";
-  if (indent) {
-    output << std::endl;
-  }
-  pendingElems.push_back(name);
-}
-
-void XMLWriter::closeElement() {
-  assert(!pendingElems.empty());
-  indent_(pendingElems.size() - 1);
-  output << "</" << pendingElems.back() << ">";
-  if (indent) {
-    output << std::endl;
-  }
-  pendingElems.pop_back();
-  if (pendingElems.empty()) {
-    closed = true;
-  }
-}
-
-void XMLWriter::writeEmptyElement(const std::string& name,
-                                  const XMLAttrs& attrs) {
-  assert(!closed);
-  indent_(pendingElems.size());
-  output << "<" << name;
-  writeAttrs(attrs);
-  output << " />";
-  if (indent) {
-    output << std::endl;
-  }
-}
-
-void XMLWriter::writeAttrs(const XMLAttrs& attrs) {
-  for (auto& i : attrs) {
-    output << " " << i.first << "=\"";
-    for (char c : i.second) {
-      if (c == '"') {
-        output << "&quot;";
-      } else if (c == '<') {
-        output << "&lt;";
-      } else if (c == '>') {
-        output << "&gt;";
-      } else if (c == '&') {
-        output << "&amp;";
-        /* Escape newlines to prevent attribute normalisation (see
-           XML spec, section 3.3.3. */
-      } else if (c == '\n') {
-        output << "&#xA;";
-      } else {
-        output << c;
-      }
-    }
-    output << "\"";
-  }
-}
-
-}  // namespace nix