homebrew-core/Formula/v8.rb

class V8 < Formula
  desc "Google's JavaScript engine"
  homepage "https://github.com/v8/v8/wiki"
  # Track V8 version from Chrome stable: https://omahaproxy.appspot.com
  url "https://github.com/v8/v8/archive/10.2.154.4.tar.gz"
  sha256 "6f4865ffe499f51da3e422cf7e4d85d3dab1b0a99b2d5bf204910ce423505597"
  license "BSD-3-Clause"

  livecheck do
    url "https://omahaproxy.appspot.com/all.json?os=mac&channel=stable"
    regex(/"v8_version": "v?(\d+(?:\.\d+)+)"/i)
  end

  bottle do
    sha256 cellar: :any,                 arm64_monterey: "9356133c624b366d4fe95ba96b299ef86aab4d34f4b2be7415bf8622c5a40ed7"
    sha256 cellar: :any,                 arm64_big_sur:  "8a2841b43c1fb89fcf218eb6bb340012c782502cabc2bfaadbab6f83ae561cbe"
    sha256 cellar: :any,                 monterey:       "4930cb3d2541294f93a44daf8d70c66511bf6d81e3d94f6691c25dcc355f1ab7"
    sha256 cellar: :any,                 big_sur:        "3ba40273b83236ba5aa28d9b6276d2ba431ff421f5f95f09007e05d7b23c79ab"
    sha256 cellar: :any,                 catalina:       "9c6e7386475164af409437e86abb7d8ed8f5d4d0611c41348a0d4754382df38d"
    sha256 cellar: :any_skip_relocation, x86_64_linux:   "d605b343d54a84ee5af95f801518950540eaa678abeea32e6dfda9618c22d89d"
  end

  depends_on "ninja" => :build
  depends_on "python@3.10" => :build

  on_macos do
    depends_on "llvm" => :build
    depends_on xcode: ["10.0", :build] # required by v8
  end

  on_linux do
    depends_on "pkg-config" => :build
    depends_on "gcc"
    depends_on "glib"
  end

  fails_with gcc: "5"

  # Look up the correct resource revisions in the DEP file of the specific releases tag
  # e.g. for CIPD dependency gn: https://chromium.googlesource.com/v8/v8.git/+/refs/tags/10.2.154.4/DEPS#43
  resource "gn" do
    url "https://gn.googlesource.com/gn.git",
        revision: "ae110f8b525009255ba1f9ae96982176d3bfad3d"
  end

  # e.g.: https://chromium.googlesource.com/v8/v8.git/+/refs/tags/10.2.154.4/DEPS#84
  resource "v8/base/trace_event/common" do
    url "https://chromium.googlesource.com/chromium/src/base/trace_event/common.git",
        revision: "d115b033c4e53666b535cbd1985ffe60badad082"
  end

  resource "v8/build" do
    url "https://chromium.googlesource.com/chromium/src/build.git",
        revision: "b37c340767cf9e7777d4ca5a588c34c5744df9b2"
  end

  resource "v8/third_party/googletest/src" do
    url "https://chromium.googlesource.com/external/github.com/google/googletest.git",
        revision: "af29db7ec28d6df1c7f0f745186884091e602e07"
  end

  resource "v8/third_party/icu" do
    url "https://chromium.googlesource.com/chromium/deps/icu.git",
        revision: "1fd0dbea04448c3f73fe5cb7599f9472f0f107f1"
  end

  resource "v8/third_party/jinja2" do
    url "https://chromium.googlesource.com/chromium/src/third_party/jinja2.git",
        revision: "ee69aa00ee8536f61db6a451f3858745cf587de6"
  end

  resource "v8/third_party/markupsafe" do
    url "https://chromium.googlesource.com/chromium/src/third_party/markupsafe.git",
        revision: "1b882ef6372b58bfd55a3285f37ed801be9137cd"
  end

  resource "v8/third_party/zlib" do
    url "https://chromium.googlesource.com/chromium/src/third_party/zlib.git",
        revision: "a6d209ab932df0f1c9d5b7dc67cfa74e8a3272c0"
  end

  # Apply patch to fix v8 build with glibc < 2.27. See here for details:
  # https://libc-alpha.sourceware.narkive.com/XOENQFwL/add-fcntl-sealing-interfaces-from-linux-3-17-to-bits-fcntl-linux-h
  patch :DATA

  def install
    (buildpath/"build").install resource("v8/build")
    (buildpath/"third_party/jinja2").install resource("v8/third_party/jinja2")
    (buildpath/"third_party/markupsafe").install resource("v8/third_party/markupsafe")
    (buildpath/"third_party/googletest/src").install resource("v8/third_party/googletest/src")
    (buildpath/"base/trace_event/common").install resource("v8/base/trace_event/common")
    (buildpath/"third_party/icu").install resource("v8/third_party/icu")
    (buildpath/"third_party/zlib").install resource("v8/third_party/zlib")

    # Build gn from source and add it to the PATH
    (buildpath/"gn").install resource("gn")
    cd "gn" do
      system "python3", "build/gen.py"
      system "ninja", "-C", "out/", "gn"
    end
    ENV.prepend_path "PATH", buildpath/"gn/out"

    # create gclient_args.gni
    (buildpath/"build/config/gclient_args.gni").write <<~EOS
      declare_args() {
        checkout_google_benchmark = false
      }
    EOS

    # setup gn args
    gn_args = {
      is_debug:                     false,
      is_component_build:           true,
      v8_use_external_startup_data: false,
      v8_enable_i18n_support:       true, # enables i18n support with icu
      clang_base_path:              "\"#{Formula["llvm"].opt_prefix}\"", # uses Homebrew clang instead of Google clang
      clang_use_chrome_plugins:     false, # disable the usage of Google's custom clang plugins
      use_custom_libcxx:            false, # uses system libc++ instead of Google's custom one
      treat_warnings_as_errors:     false, # ignore not yet supported clang argument warnings
      use_lld:                      false, # upstream use LLD but this leads to build failure on ARM
    }

    if OS.linux?
      gn_args[:is_clang] = false # use GCC on Linux
      gn_args[:use_sysroot] = false # don't use sysroot
      gn_args[:custom_toolchain] = "\"//build/toolchain/linux/unbundle:default\"" # uses system toolchain
      gn_args[:host_toolchain] = "\"//build/toolchain/linux/unbundle:default\"" # to respect passed LDFLAGS
      ENV["AR"] = DevelopmentTools.locate("ar")
      ENV["NM"] = DevelopmentTools.locate("nm")
      gn_args[:use_rbe] = false
    end

    # use clang from homebrew llvm formula, because the system clang is unreliable
    ENV.remove "HOMEBREW_LIBRARY_PATHS", Formula["llvm"].opt_lib # but link against system libc++
    # Make sure private libraries can be found from lib
    ENV.prepend "LDFLAGS", "-Wl,-rpath,#{libexec}"

    # Transform to args string
    gn_args_string = gn_args.map { |k, v| "#{k}=#{v}" }.join(" ")

    # Build with gn + ninja
    system "gn", "gen", "--args=#{gn_args_string}", "out.gn"
    system "ninja", "-j", ENV.make_jobs, "-C", "out.gn", "-v", "d8"

    # Install libraries and headers into libexec so d8 can find them, and into standard directories
    # so other packages can find them and they are linked into HOMEBREW_PREFIX
    (libexec/"include").install Dir["include/*"]
    include.install_symlink Dir[libexec/"include/*"]

    libexec.install Dir["out.gn/d8", "out.gn/icudtl.dat"]
    bin.write_exec_script libexec/"d8"

    libexec.install Dir["out.gn/#{shared_library("*")}"]
    lib.install_symlink Dir[libexec/shared_library("libv8*")]
    rm Dir[lib/"*.TOC"] if OS.linux? # Remove symlinks to .so.TOC text files
  end

  test do
    assert_equal "Hello World!", shell_output("#{bin}/d8 -e 'print(\"Hello World!\");'").chomp
    t = "#{bin}/d8 -e 'print(new Intl.DateTimeFormat(\"en-US\").format(new Date(\"2012-12-20T03:00:00\")));'"
    assert_match %r{12/\d{2}/2012}, shell_output(t).chomp

    (testpath/"test.cpp").write <<~EOS
      #include <libplatform/libplatform.h>
      #include <v8.h>
      int main(){
        static std::unique_ptr<v8::Platform> platform = v8::platform::NewDefaultPlatform();
        v8::V8::InitializePlatform(platform.get());
        v8::V8::Initialize();
        return 0;
      }
    EOS

    # link against installed libc++
    system ENV.cxx, "-std=c++14", "test.cpp",
      "-I#{include}",
      "-L#{lib}", "-lv8", "-lv8_libplatform"
  end
end

__END__
--- a/src/base/platform/platform-posix.cc
+++ b/src/base/platform/platform-posix.cc
@@ -88,6 +88,11 @@ extern int madvise(caddr_t, size_t, int);
 extern "C" void* __libc_stack_end;
 #endif

+#ifndef MFD_CLOEXEC
+#define MFD_CLOEXEC 0x0001U
+#define MFD_ALLOW_SEALING 0x0002U
+#endif
+
 namespace v8 {
 namespace base {