src: avoid C strings in more C++ exception throws

Similar to 2e2f4cd, just missed them in that commit.

PR-URL: #60592
Reviewed-By: Marco Ippolito <marcoippolito54@gmail.com>
Reviewed-By: Juan José Arboleda <soyjuanarbol@gmail.com>
Reviewed-By: Yagiz Nizipli <yagiz@nizipli.com>
Reviewed-By: Colin Ihrig <cjihrig@gmail.com>
Reviewed-By: Chengzhong Wu <legendecas@gmail.com>

Author: addaleax

src/debug_utils-inl.h

@@ -23,13 +23,26 @@ concept StringConvertible = requires(T a) {
                                 a.ToString()
                                 } -> std::convertible_to<std::string>;
                             };
+// For std::filesystem::path and similar types
+template <typename T>
+concept StringConvertibleFSPathLike = requires(T a) {
+                                        {
+                                          a.string()
+                                          } -> std::convertible_to<std::string>;
+                                      };
 
 struct ToStringHelper {
   template <typename T>
     requires(StringConvertible<T>) && (!StringViewConvertible<T>)
   static std::string Convert(const T& value) {
     return value.ToString();
   }
+  template <typename T>
+    requires(StringConvertibleFSPathLike<T>) && (!StringViewConvertible<T>) &&
+            (!StringConvertible<T>)
+  static std::string Convert(const T& value) {
+    return value.string();
+  }
   template <typename T>
     requires StringViewConvertible<T>
   static std::string_view Convert(const T& value) {

src/node_file.cc

@@ -3532,12 +3532,10 @@ static void CpSyncCopyDir(const FunctionCallbackInfo<Value>& args) {
               if (!dereference &&
                   std::filesystem::is_directory(symlink_target) &&
                   isInsideDir(symlink_target, current_dest_symlink_target)) {
-                std::string message =
+                static constexpr const char* message =
                     "Cannot copy %s to a subdirectory of self %s";
-                THROW_ERR_FS_CP_EINVAL(env,
-                                       message.c_str(),
-                                       symlink_target.c_str(),
-                                       current_dest_symlink_target.c_str());
+                THROW_ERR_FS_CP_EINVAL(
+                    env, message, symlink_target, current_dest_symlink_target);
                 return false;
               }
 
@@ -3546,12 +3544,10 @@ static void CpSyncCopyDir(const FunctionCallbackInfo<Value>& args) {
               // and therefore a broken symlink would be created.
               if (std::filesystem::is_directory(dest_file_path) &&
                   isInsideDir(current_dest_symlink_target, symlink_target)) {
-                std::string message = "cannot overwrite %s with %s";
+                static constexpr const char* message =
+                    "cannot overwrite %s with %s";
                 THROW_ERR_FS_CP_SYMLINK_TO_SUBDIRECTORY(
-                    env,
-                    message.c_str(),
-                    current_dest_symlink_target.c_str(),
-                    symlink_target.c_str());
+                    env, message, current_dest_symlink_target, symlink_target);
                 return false;
               }
 
@@ -3603,7 +3599,7 @@ static void CpSyncCopyDir(const FunctionCallbackInfo<Value>& args) {
             THROW_ERR_FS_CP_EEXIST(isolate,
                                    "[ERR_FS_CP_EEXIST]: Target already exists: "
                                    "cp returned EEXIST (%s already exists)",
-                                   dest_file_path.c_str());
+                                   dest_file_path);
             return false;
           }
           env->ThrowStdErrException(error, "cp", dest_str.c_str());