tidy: enable modernize-use-nullptr

ci/test/06_script_a.sh

@@ -49,7 +49,7 @@ if [[ ${USE_MEMORY_SANITIZER} == "true" ]]; then
 fi
 
 if [[ "${RUN_TIDY}" == "true" ]]; then
-  MAYBE_BEAR="bear"
+  MAYBE_BEAR="bear --config src/.bear-tidy-config"
   MAYBE_TOKEN="--"
 fi
 

configure.ac

@@ -1935,6 +1935,7 @@ AC_CONFIG_LINKS([contrib/devtools/test-security-check.py:contrib/devtools/test-s
 AC_CONFIG_LINKS([contrib/devtools/test-symbol-check.py:contrib/devtools/test-symbol-check.py])
 AC_CONFIG_LINKS([contrib/filter-lcov.py:contrib/filter-lcov.py])
 AC_CONFIG_LINKS([contrib/macdeploy/background.tiff:contrib/macdeploy/background.tiff])
+AC_CONFIG_LINKS([src/.bear-tidy-config:src/.bear-tidy-config])
 AC_CONFIG_LINKS([src/.clang-tidy:src/.clang-tidy])
 AC_CONFIG_LINKS([test/functional/test_runner.py:test/functional/test_runner.py])
 AC_CONFIG_LINKS([test/fuzz/test_runner.py:test/fuzz/test_runner.py])

src/.bear-tidy-config

@@ -0,0 +1,15 @@
+{
+  "output": {
+    "content": {
+      "include_only_existing_source": true,
+      "paths_to_include": [],
+      "paths_to_exclude": [
+        "src/leveldb"
+      ]
+    },
+    "format": {
+      "command_as_array": true,
+      "drop_output_field": false
+    }
+  }
+}

src/.clang-tidy

@@ -1,2 +1,2 @@
-Checks:          '-*,bugprone-argument-comment'
-WarningsAsErrors: bugprone-argument-comment
+Checks:          '-*,bugprone-argument-comment,modernize-use-nullptr'
+WarningsAsErrors: 'bugprone-argument-comment,modernize-use-nullptr'