# Patches for Qt5 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 Qt5 < Formula
  desc "Cross-platform application and UI framework"
  homepage "https://www.qt.io/"
  revision 1
  head "https://code.qt.io/qt/qt5.git", :branch => "5.8", :shallow => false

  stable do
    url "https://download.qt.io/official_releases/qt/5.8/5.8.0/single/qt-everywhere-opensource-src-5.8.0.tar.xz"
    mirror "https://www.mirrorservice.org/sites/download.qt-project.org/official_releases/qt/5.8/5.8.0/single/qt-everywhere-opensource-src-5.8.0.tar.xz"
    sha256 "0f4c54386d3dbac0606a936a7145cebb7b94b0ca2d29bc001ea49642984824b6"

    # Upstream issue "Qt5.8: macOS, designer examples fails to compile"
    # Reported 15 Dec 2016 https://bugreports.qt.io/browse/QTBUG-57656
    # Upstream PR from 31 Jan 2017 "fix installation of header-only frameworks"
    # See https://codereview.qt-project.org/#/c/184053/1
    patch do
      url "https://raw.githubusercontent.com/Homebrew/formula-patches/634a19fb/qt5/QTBUG-57656.patch"
      sha256 "a69fc727f4378dbe0cf05ecf6e633769fe7ee6ea52b1630135a05d5adfa23d87"
    end
  end

  bottle do
    sha256 "b970062ce3534e7265e2cd3d7f4bcd57e852cfc21ca23d834d281281fd20b107" => :sierra
    sha256 "4054b76f3dad826ff7c01980ab8c49e117ca6c0a0ed8b6f5cdd7e242762820c8" => :el_capitan
    sha256 "0f6e703d3f08e30a93aa7c3093874e4ed1055d56f1a1e3dd248f2d76041c4536" => :yosemite
  end

  keg_only "Qt 5 has CMake issues when linked"

  option "with-docs", "Build documentation"
  option "with-examples", "Build examples"
  option "with-qtwebkit", "Build with QtWebkit module"

  # OS X 10.7 Lion is still supported in Qt 5.5, but is no longer a reference
  # configuration and thus untested in practice. Builds on OS X 10.7 have been
  # reported to fail: <https://github.com/Homebrew/homebrew/issues/45284>.
  depends_on :macos => :mountain_lion

  depends_on "pkg-config" => :build
  depends_on :xcode => :build
  depends_on :mysql => :optional
  depends_on :postgresql => :optional

  # http://lists.qt-project.org/pipermail/development/2016-March/025358.html
  resource "qt-webkit" do
    url "https://download.qt.io/community_releases/5.8/5.8.0-final/qtwebkit-opensource-src-5.8.0.tar.xz"
    sha256 "79ae8660086bf92ffb0008b17566270e6477c8fa0daf9bb3ac29404fb5911bec"
  end

  # Restore `.pc` files for framework-based build of Qt 5 on OS X. This
  # partially reverts <https://codereview.qt-project.org/#/c/140954/> merged
  # between the 5.5.1 and 5.6.0 releases. (Remove this as soon as feasible!)
  #
  # Core formulae known to fail without this patch (as of 2016-10-15):
  #   * gnuplot  (with `--with-qt5` option)
  #   * mkvtoolnix (with `--with-qt5` option, silent build failure)
  #   * poppler    (with `--with-qt5` option)
  patch do
    url "https://raw.githubusercontent.com/Homebrew/formula-patches/e8fe6567/qt5/restore-pc-files.patch"
    sha256 "48ff18be2f4050de7288bddbae7f47e949512ac4bcd126c2f504be2ac701158b"
  end

  def install
    args = %W[
      -verbose
      -prefix #{prefix}
      -release
      -opensource -confirm-license
      -system-zlib
      -qt-libpng
      -qt-libjpeg
      -qt-freetype
      -qt-pcre
      -nomake tests
      -no-rpath
      -pkg-config
      -dbus-runtime
    ]

    args << "-nomake" << "examples" if build.without? "examples"

    if build.with? "mysql"
      args << "-plugin-sql-mysql"
      (buildpath/"brew_shim/mysql_config").write <<-EOS.undent
        #!/bin/sh
        if [ x"$1" = x"--libs" ]; then
          mysql_config --libs | sed "s/-lssl -lcrypto//"
        else
          exec mysql_config "$@"
        fi
      EOS
      chmod 0755, "brew_shim/mysql_config"
      args << "-mysql_config" << buildpath/"brew_shim/mysql_config"
    end

    args << "-plugin-sql-psql" if build.with? "postgresql"

    if build.with? "qtwebkit"
      (buildpath/"qtwebkit").install resource("qt-webkit")
      inreplace ".gitmodules", /.*status = obsolete\n((\s*)project = WebKit\.pro)/, "\\1\n\\2initrepo = true"
    end

    system "./configure", *args
    system "make"
    ENV.deparallelize
    system "make", "install"

    if build.with? "docs"
      system "make", "docs"
      system "make", "install_docs"
    end

    # 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`. Also add a `-qt5` suffix to
    # avoid conflict with the `*.app` bundles provided by the `qt` formula.
    # (Note: This move/rename 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") do |app|
      mv app, libexec/"#{app.basename(".app")}-qt5.app"
    end
  end

  def caveats; <<-EOS.undent
    We agreed to the Qt opensource license for you.
    If this is unacceptable you should uninstall.
    EOS
  end

  test do
    (testpath/"hello.pro").write <<-EOS.undent
      QT       += core
      QT       -= gui
      TARGET = hello
      CONFIG   += console
      CONFIG   -= app_bundle
      TEMPLATE = app
      SOURCES += main.cpp
    EOS

    (testpath/"main.cpp").write <<-EOS.undent
      #include <QCoreApplication>
      #include <QDebug>

      int main(int argc, char *argv[])
      {
        QCoreApplication a(argc, argv);
        qDebug() << "Hello World!";
        return 0;
      }
    EOS

    system bin/"qmake", testpath/"hello.pro"
    system "make"
    assert File.exist?("hello")
    assert File.exist?("main.o")
    system "./hello"
  end
end