WIP homebrew formula to build supercollider latest version

supercollider.rb

class Supercollider < Formula
  homepage "https://supercollider.github.io"
  url "https://github.com/supercollider/supercollider.git", :using => :git

  depends_on :xcode => :build
  depends_on :macos => :lion
  depends_on "cmake" => :build
  depends_on "qt5" => :build
  depends_on "readline" => :build

  version "3.7-devel"

  def install
    ENV.deparallelize
    bp = buildpath/"build"
    mkdir_p bp
    # std_cmake_args +
    args = [
      "-G", "Xcode",
      "-DCMAKE_PREFIX_PATH=#{Formula['qt5'].opt_prefix}",
      "-DSC_QT=1",
      # defaults to the user's OS
      # "-DCMAKE_OSX_DEPLOYMENT_TARGET=10.7",
      "-DREADLINE_INCLUDE_DIR=#{Formula['readline'].opt_include}",
      "-DREADLINE_LIBRARY=#{Formula['readline'].opt_lib}/libreadline.dylib",
      ".."
    ]

    cd bp do
      system "cmake", *args
      xcodebuild "-target", "install"
    end

    # Copy the app into the cellar
    # User should then run `brew linkapps supercollider`
    # to install it into /Applications
    cp_r "./build/Install/SuperCollider/SuperCollider.app", prefix/"SuperCollider.app"

    # Install sclang and scsynth binaries.
    # sclang and scsynth need to be executed in the bundle
    # or the dynamic linking to the Qt libraries gets confused.
    # write_exec_script creates a wrapper to exec it
    bin.write_exec_script prefix/"SuperCollider.app/Contents/MacOS/sclang"
    bin.write_exec_script prefix/"SuperCollider.app/Contents/MacOS/scsynth"
  end

  test do
    # `test do` will create, run in and delete a temporary directory.
    assert File.exist?("#{prefix}/SuperCollider.app")
    assert File.exist?("#{bin}/sclang")
    assert File.exist?("#{bin}/scsynth")
    # when -V is implemented in sclang then we can run the process
    # system "#{bin}/sclang", "-V"
  end

end

Current master still requires qt4. So changing that in line 19 and changing line 31 to:
"-DCMAKE_PREFIX_PATH=#{Formula['qt4'].prefix}"
should make it work. I also changed line 30 to:
"-DREADLINE_LIBRARY=#{Formula['readline'].opt_lib}/libreadline.dylib",
and added
"-DCMAKE_BUILD_TYPE=Release",
and removed line 20 - which I am not sure about as 3.7 does not build on 10.6 any more.
Not sure if those later three are required, but it built successfully for me with those changes.

If you use:
brew install supercollider --verbose --debug
you'll get cmake output to stdout and some options when the build fails...
Best
.r.

Since qt5 was merged brew-readline is found automatically. The only required cmake-argument remains:
"-DCMAKE_PREFIX_PATH=#{Formula['qt5'].prefix}"
Best
.r.

I didn't see your comments before. thanks ! I did realize shortly afterwards that qt5 wasn't in master yet.

updated the gist. this works now.

It seemed to find readline on its own. It would be safer to specify it though.

it defaulted to Release already. -DCMAKE_BUILD_TYPE=Release