Add clazy restyler

I'm not 100% this is working since I can't get it to do anything without
using `-checks=level2`. The behavior doesn't seem to match the
documentation there, which could be a me problem or not.

In any event, this is not harmful and so is good to ship, now that I was
able to add that `-checks=level2` in only the tests. Maybe an
experienced user can figure this out.

clazy/Dockerfile

@@ -0,0 +1,21 @@
+FROM ubuntu:22.04
+LABEL maintainer="Pat Brisbin [email protected]"
+ENV DEBIAN_FRONTEND=noninteractive LANG=C.UTF-8 LC_ALL=C.UTF-8
+RUN \
+  apt-get update && \
+  apt-get -y --no-install-recommends install \
+    clang \
+    clang-tools \
+    clazy \
+    cmake \
+    make \
+    locales \
+    qt6-base-dev && \
+  locale-gen en_US.UTF-8 && \
+  rm -rf /var/lib/apt/lists/*
+ENV LANG=en_US.UTF-8
+COPY clazy-standlone-apply /usr/local/bin/clazy-standalone-apply
+RUN mkdir -p /code
+WORKDIR /code
+ENTRYPOINT []
+CMD ["clazy-standalone-apply", "--help"]

clazy/clazy-standlone-apply

@@ -0,0 +1,9 @@
+#!/usr/bin/env bash
+set -eou pipefail
+
+tmp=$(mktemp -d)
+trap 'rm -rf "$tmp"' EXIT
+
+cmake -DCMAKE_EXPORT_COMPILE_COMMANDS=ON .
+clazy-standalone --export-fixes="$tmp"/fixes.yaml "$@"
+clang-apply-replacements "$tmp"

clazy/info.yaml

@@ -0,0 +1,62 @@
+enabled: true
+name: clazy
+command:
+  - clazy-standalone-apply
+supports_arg_sep: false
+version_cmd: |
+  apt-cache policy clazy | sed '/^ *Installed: \(.*\)$/!d; s//v\1/'
+include:
+  - "**/*.cpp"
+documentation:
+  - https://github.com/KDE/clazy
+metadata:
+  languages:
+    - C++
+  tests:
+    - name: qstring-allocations
+      arguments: ["-checks=level2"]
+      support:
+        path: CMakeLists.txt
+        contents: |
+          cmake_minimum_required(VERSION 3.16)
+
+          project(helloworld VERSION 1.0.0 LANGUAGES CXX)
+
+          set(CMAKE_CXX_STANDARD 17)
+          set(CMAKE_CXX_STANDARD_REQUIRED ON)
+
+          set(CMAKE_AUTOMOC ON)
+
+          find_package(Qt6 REQUIRED COMPONENTS Core)
+
+          add_executable(helloworld
+              clazy-test-1.cpp
+          )
+
+          target_link_libraries(helloworld PRIVATE Qt6::Core)
+      contents: |
+        #include <iostream>
+        #include <QString>
+
+        int main() {
+          QString str = "hello";
+          QString result = str.left(1);
+
+          std::cout << "Original string: " << str.toStdString() << std::endl;
+          std::cout << "Substring from index 5 onwards: " << result.toStdString() << std::endl;
+
+          return 0;
+        }
+      restyled: |
+        #include <iostream>
+        #include <QString>
+
+        int main() {
+          QString str = QStringLiteral("hello");
+          QString result = str.left(1);
+
+          std::cout << "Original string: " << str.toStdString() << std::endl;
+          std::cout << "Substring from index 5 onwards: " << result.toStdString() << std::endl;
+
+          return 0;
+        }