bazel: add support for qt

Add qt hello world

Author: danctorres

WORKSPACE

@@ -64,3 +64,25 @@ http_archive(
         "https://github.com/bazelbuild/buildtools/archive/refs/tags/4.2.2.tar.gz",
     ],
 )
+load("@bazel_tools//tools/build_defs/repo:git.bzl", "git_repository")
+
+git_repository(
+    name = "com_justbuchanan_rules_qt",
+    remote = "https://github.com/justbuchanan/bazel_rules_qt.git",
+    branch = "master",
+)
+
+load("@com_justbuchanan_rules_qt//:qt_configure.bzl", "qt_configure")
+
+qt_configure()
+
+load("@local_config_qt//:local_qt.bzl", "local_qt_path")
+
+new_local_repository(
+    name = "qt",
+    build_file = "@com_justbuchanan_rules_qt//:qt.BUILD",
+    path = local_qt_path(),
+)
+
+load("@com_justbuchanan_rules_qt//tools:qt_toolchain.bzl", "register_qt_toolchains")
+register_qt_toolchains()

examples/qt/BUILD

@@ -0,0 +1,10 @@
+load("@com_justbuchanan_rules_qt//:qt.bzl", "qt_cc_library", "qt_ui_library")
+
+cc_binary(
+    name = "main",
+    srcs = ["main.cpp"],
+    copts = ["-fpic"],
+    deps = [
+        "@qt//:qt_widgets",
+    ],
+)

examples/qt/README

@@ -0,0 +1,5 @@
+# How to Run:
+
+```bash
+bazel run //examples/qt:main
+```

examples/qt/main.cpp

@@ -0,0 +1,15 @@
+#include <QtWidgets/QApplication>
+#include <QtWidgets/QPushButton>
+
+auto main(int argc, char *argv[]) -> int {
+    QApplication app(argc, argv);  // Create the QApplication object
+
+    // Create a simple push button with the text "Hello World"
+    QPushButton button("Hello World");
+
+    // Show the button
+    button.show();
+
+    // Start the application's event loop
+    return app.exec();
+}