Merge changes I526cceed,Ia4e2f1fa,I22e66972,I9fbd55a9,Ifca22e44 into main

* changes:
  sqlite: add a Use::fromStrNullable
  util: implement charptr_cast
  tree-wide: fix a pile of lints
  refactor: make HashType and Base enum classes for type safety
  build: integrate clang-tidy into CI

1 files changed, 2 insertions, 1 deletions

diff --git a/src/libutil/strings.cc b/src/libutil/strings.cc
index df48e9203..de9a0eb9f 100644
--- a/src/libutil/strings.cc
+++ b/src/libutil/strings.cc
@@ -8,7 +8,8 @@ namespace nix {
 std::vector<char *> stringsToCharPtrs(const Strings & ss)
 {
     std::vector<char *> res;
-    for (auto & s : ss) res.push_back((char *) s.c_str());
+    // This is const cast since this exists for OS APIs that want char *
+    for (auto & s : ss) res.push_back(const_cast<char *>(s.data()));
     res.push_back(0);
     return res;
 }