class Rust < Formula
  desc "Safe, concurrent, practical language"
  homepage "https://www.rust-lang.org/"
  license any_of: ["Apache-2.0", "MIT"]

  stable do
    url "https://static.rust-lang.org/dist/rustc-1.69.0-src.tar.gz"
    sha256 "fb05971867ad6ccabbd3720279f5a94b99f61024923187b56bb5c455fa3cf60f"

    # From https://github.com/rust-lang/rust/tree/#{version}/src/tools
    resource "cargo" do
      url "https://github.com/rust-lang/cargo.git",
          tag:      "0.70.0",
          revision: "6e9a83356b70586d4b77613a6b33f9ea067b9cdf"
    end
  end

  bottle do
    sha256 cellar: :any,                 arm64_ventura:  "0ca792a1dc62130fce46ebb1fb7cb9adf7d9382eb00a47d444b46f502bd00298"
    sha256 cellar: :any,                 arm64_monterey: "2a682658ec44fb651ea2872b437944f14b361b8e559e301f27f73d501ac75b13"
    sha256 cellar: :any,                 arm64_big_sur:  "61db8deb3fc312c4921b4ad84868d5c350f68e107d07037103a5a7c594e95d07"
    sha256 cellar: :any,                 ventura:        "f2f65bf433a89cb82ead5bd77ecc83cedc1517fb0ed917fc570126fde6008a24"
    sha256 cellar: :any,                 monterey:       "1ba0ae6aaa1319c834c21dfd4f131576c65b696f07a6708c0a28d4f50ec56e21"
    sha256 cellar: :any,                 big_sur:        "5fa5a33f0ee9c446f293c46841f2575f07968c679e3180c105b4a57d1c214279"
    sha256 cellar: :any_skip_relocation, x86_64_linux:   "ca21499b915b29248c23c9720a7cffff27af5c3be0d3c16cad21bb744b7b406f"
  end

  head do
    url "https://github.com/rust-lang/rust.git", branch: "master"

    resource "cargo" do
      url "https://github.com/rust-lang/cargo.git", branch: "master"
    end
  end

  depends_on "cmake" => :build
  depends_on "ninja" => :build
  depends_on "python@3.11" => :build
  depends_on "openssl@3"
  depends_on "pkg-config"

  uses_from_macos "curl"
  uses_from_macos "zlib"

  resource "cargobootstrap" do
    on_macos do
      # From https://github.com/rust-lang/rust/blob/#{version}/src/stage0.json
      on_arm do
        url "https://static.rust-lang.org/dist/2023-03-28/cargo-1.68.2-aarch64-apple-darwin.tar.gz"
        sha256 "7317f1a2823a78f531f433d55cf76baf8701d16268bded12e0501fc07e74c6f4"
      end
      on_intel do
        url "https://static.rust-lang.org/dist/2023-03-28/cargo-1.68.2-x86_64-apple-darwin.tar.gz"
        sha256 "c580e7dbf6bde9bf4246380ac1591682981dc7cbdb7b82a95eac8322d866e4bd"
      end
    end

    on_linux do
      # From: https://github.com/rust-lang/rust/blob/#{version}/src/stage0.json
      on_arm do
        url "https://static.rust-lang.org/dist/2023-03-28/cargo-1.68.2-aarch64-unknown-linux-gnu.tar.gz"
        sha256 "09119c8df515f3358dbbb23514a80deb5d9891a5fcd4323667dbc84f32a160da"
      end
      on_intel do
        url "https://static.rust-lang.org/dist/2023-03-28/cargo-1.68.2-x86_64-unknown-linux-gnu.tar.gz"
        sha256 "cf4e6c9d1a61c1898ffa21353fc9eb4c1512fc6beb6cad433851fbed777f1ea6"
      end
    end
  end

  def install
    ENV.prepend_path "PATH", Formula["python@3.11"].opt_libexec/"bin"

    # Ensure that the `openssl` crate picks up the intended library.
    # https://crates.io/crates/openssl#manual-configuration
    ENV["OPENSSL_DIR"] = Formula["openssl@3"].opt_prefix

    if OS.mac? && MacOS.version <= :sierra
      # Requires the CLT to be the active developer directory if Xcode is installed
      ENV["SDKROOT"] = MacOS.sdk_path
      # Fix build failure for compiler_builtins "error: invalid deployment target
      # for -stdlib=libc++ (requires OS X 10.7 or later)"
      ENV["MACOSX_DEPLOYMENT_TARGET"] = MacOS.version
    end

    args = %W[--prefix=#{prefix} --enable-vendor --set rust.jemalloc]
    if build.head?
      args << "--disable-rpath"
      args << "--release-channel=nightly"
    else
      args << "--release-channel=stable"
    end

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

    resource("cargobootstrap").stage do
      system "./install.sh", "--prefix=#{buildpath}/cargobootstrap"
    end
    ENV.prepend_path "PATH", buildpath/"cargobootstrap/bin"

    resource("cargo").stage do
      ENV["RUSTC"] = bin/"rustc"
      args = %W[--root #{prefix} --path .]
      args += %w[--features curl-sys/force-system-lib-on-osx] if OS.mac?
      system "cargo", "install", *args
      man1.install Dir["src/etc/man/*.1"]
      bash_completion.install "src/etc/cargo.bashcomp.sh"
      zsh_completion.install "src/etc/_cargo"
    end

    (lib/"rustlib/src/rust").install "library"
    rm_rf prefix/"lib/rustlib/uninstall.sh"
    rm_rf prefix/"lib/rustlib/install.log"
  end

  def post_install
    Dir["#{lib}/rustlib/**/*.dylib"].each do |dylib|
      chmod 0664, dylib
      MachO::Tools.change_dylib_id(dylib, "@rpath/#{File.basename(dylib)}")
      MachO.codesign!(dylib) if Hardware::CPU.arm?
      chmod 0444, dylib
    end
  end

  test do
    system bin/"rustdoc", "-h"
    (testpath/"hello.rs").write <<~EOS
      fn main() {
        println!("Hello World!");
      }
    EOS
    system bin/"rustc", "hello.rs"
    assert_equal "Hello World!\n", shell_output("./hello")
    system bin/"cargo", "new", "hello_world", "--bin"
    assert_equal "Hello, world!", cd("hello_world") { shell_output("#{bin}/cargo run").split("\n").last }
  end
end