class ClangFormat < Formula
  homepage "http://clang.llvm.org/docs/ClangFormat.html"
  version "2015-01-13"

  bottle do
    cellar :any
    sha1 "8914ee2952c7bcf08ae8899b3476bb3aa5ed1d27" => :yosemite
    sha1 "dec6ae38d1bf84099417aac40403358fe5601c64" => :mavericks
    sha1 "034eed4622e22d15dd9b5aa84923024dd7ef93c4" => :mountain_lion
  end

  stable do
    url "http://llvm.org/svn/llvm-project/llvm/tags/google/testing/2015-01-13/", :using => :svn

    resource "clang" do
      url "http://llvm.org/svn/llvm-project/cfe/tags/google/testing/2015-01-13/", :using => :svn
    end

    resource "libcxx" do
      url "http://llvm.org/releases/3.5.0/libcxx-3.5.0.src.tar.xz"
      sha1 "c98beed86ae1adf9ab7132aeae8fd3b0893ea995"
    end
  end

  head do
    url "http://llvm.org/svn/llvm-project/llvm/trunk/", :using => :svn

    resource "clang" do
      url "http://llvm.org/svn/llvm-project/cfe/trunk/", :using => :svn
    end

    resource "libcxx" do
      url "http://llvm.org/releases/3.5.0/libcxx-3.5.0.src.tar.xz"
      sha1 "c98beed86ae1adf9ab7132aeae8fd3b0893ea995"
    end
  end

  depends_on "cmake" => :build
  depends_on "ninja" => :build
  depends_on "subversion" => :build

  # It'll link to GCC's libatomic in this case so need to manually specify
  # the dependency for runtime linking.
  depends_on "gcc" if MacOS.version <= :mountain_lion

  fails_with :clang do
    build 503
    cause "Host Clang must be able to find libstdc++4.7 or newer!"
  end

  def install
    (buildpath/"projects/libcxx").install resource("libcxx")
    (buildpath/"tools/clang").install resource("clang")

    mkdir "build" do
      system "cmake", "..", "-G", "Ninja", *std_cmake_args
      system "ninja", "clang-format"
      bin.install "bin/clang-format"
    end
    bin.install "tools/clang/tools/clang-format/git-clang-format"
  end

  test do
    # NB: below C code is messily formatted on purpose.
    (testpath/"test.c").write <<-EOS
      int         main(char *args) { \n   \t printf("hello"); }
    EOS

    assert_equal "int main(char *args) { printf(\"hello\"); }\n",
        shell_output("#{bin}/clang-format -style=Google test.c")
  end
end