qt@5: add qt@5, versioned formula

Aliases/qt5

@@ -1 +1 @@
-../Formula/qt.rb
+../Formula/qt@5.rb

Aliases/qt@5

@@ -1 +0,0 @@
-../Formula/qt.rb

Formula/qt@5.rb

@@ -0,0 +1,142 @@
+# Patches for Qt must be at the very least submitted to Qt's Gerrit codereview
+# rather than their bug-report Jira. The latter is rarely reviewed by Qt.
+class QtAT5 < Formula
+  desc "Cross-platform application and UI framework"
+  homepage "https://www.qt.io/"
+  url "https://download.qt.io/official_releases/qt/5.15/5.15.2/single/qt-everywhere-src-5.15.2.tar.xz"
+  mirror "https://mirrors.dotsrc.org/qtproject/archive/qt/5.15/5.15.2/single/qt-everywhere-src-5.15.2.tar.xz"
+  mirror "https://mirrors.ocf.berkeley.edu/qt/archive/qt/5.15/5.15.2/single/qt-everywhere-src-5.15.2.tar.xz"
+  sha256 "3a530d1b243b5dec00bc54937455471aaa3e56849d2593edb8ded07228202240"
+  license all_of: ["GFDL-1.3-only", "GPL-2.0-only", "GPL-3.0-only", "LGPL-2.1-only", "LGPL-3.0-only"]
+
+  keg_only :versioned_formula
+
+  depends_on "pkg-config" => :build
+  depends_on xcode: :build
+  depends_on macos: :sierra
+
+  uses_from_macos "gperf" => :build
+  uses_from_macos "bison"
+  uses_from_macos "flex"
+  uses_from_macos "sqlite"
+
+  # Find SDK for 11.x macOS
+  # Upstreamed, remove when Qt updates Chromium
+  patch do
+    url "https://raw.githubusercontent.com/Homebrew/formula-patches/92d4cf/qt/5.15.2.diff"
+    sha256 "fa99c7ffb8a510d140c02694a11e6c321930f43797dbf2fe8f2476680db4c2b2"
+  end
+
+  # Patch for qmake on ARM
+  # https://codereview.qt-project.org/c/qt/qtbase/+/327649
+  if Hardware::CPU.arm?
+    patch do
+      url "https://raw.githubusercontent.com/Homebrew/formula-patches/9dc732/qt/qt-split-arch.patch"
+      sha256 "36915fde68093af9a147d76f88a4e205b789eec38c0c6f422c21ae1e576d45c0"
+      directory "qtbase"
+    end
+  end
+
+  def install
+    args = %W[
+      -verbose
+      -prefix #{prefix}
+      -release
+      -opensource -confirm-license
+      -system-zlib
+      -qt-libpng
+      -qt-libjpeg
+      -qt-freetype
+      -qt-pcre
+      -nomake examples
+      -nomake tests
+      -no-rpath
+      -pkg-config
+      -dbus-runtime
+    ]
+
+    if Hardware::CPU.arm?
+      # Temporarily fixes for Apple Silicon
+      args << "-skip" << "qtwebengine" << "-no-assimp"
+    else
+      # Should be reenabled unconditionnaly once it is fixed on Apple Silicon
+      args << "-proprietary-codecs"
+    end
+
+    system "./configure", *args
+
+    # Remove reference to shims directory
+    inreplace "qtbase/mkspecs/qmodule.pri",
+              /^PKG_CONFIG_EXECUTABLE = .*$/,
+              "PKG_CONFIG_EXECUTABLE = #{Formula["pkg-config"].opt_bin/"pkg-config"}"
+    system "make"
+    ENV.deparallelize
+    system "make", "install"
+
+    # Some config scripts will only find Qt in a "Frameworks" folder
+    frameworks.install_symlink Dir["#{lib}/*.framework"]
+
+    # The pkg-config files installed suggest that headers can be found in the
+    # `include` directory. Make this so by creating symlinks from `include` to
+    # the Frameworks' Headers folders.
+    Pathname.glob("#{lib}/*.framework/Headers") do |path|
+      include.install_symlink path => path.parent.basename(".framework")
+    end
+
+    # Move `*.app` bundles into `libexec` to expose them to `brew linkapps` and
+    # because we don't like having them in `bin`.
+    # (Note: This move breaks invocation of Assistant via the Help menu
+    # of both Designer and Linguist as that relies on Assistant being in `bin`.)
+    libexec.mkpath
+    Pathname.glob("#{bin}/*.app") { |app| mv app, libexec }
+  end
+
+  def caveats
+    s = <<~EOS
+      We agreed to the Qt open source license for you.
+      If this is unacceptable you should uninstall.
+    EOS
+
+    if Hardware::CPU.arm?
+      s += <<~EOS
+
+        This version of Qt on Apple Silicon does not include QtWebEngine
+      EOS
+    end
+
+    s
+  end
+
+  test do
+    (testpath/"hello.pro").write <<~EOS
+      QT       += core
+      QT       -= gui
+      TARGET = hello
+      CONFIG   += console
+      CONFIG   -= app_bundle
+      TEMPLATE = app
+      SOURCES += main.cpp
+    EOS
+
+    (testpath/"main.cpp").write <<~EOS
+      #include <QCoreApplication>
+      #include <QDebug>
+
+      int main(int argc, char *argv[])
+      {
+        QCoreApplication a(argc, argv);
+        qDebug() << "Hello World!";
+        return 0;
+      }
+    EOS
+
+    # Work around "error: no member named 'signbit' in the global namespace"
+    ENV.delete "CPATH"
+
+    system bin/"qmake", testpath/"hello.pro"
+    system "make"
+    assert_predicate testpath/"hello", :exist?
+    assert_predicate testpath/"main.o", :exist?
+    system "./hello"
+  end
+end