class Mbedtls < Formula
  desc "Cryptographic & SSL/TLS library"
  homepage "https://tls.mbed.org/"
  url "https://tls.mbed.org/download/mbedtls-2.16.2-apache.tgz"
  sha256 "a6834fcd7b7e64b83dfaaa6ee695198cb5019a929b2806cb0162e049f98206a4"
  head "https://github.com/ARMmbed/mbedtls.git", :branch => "development"

  bottle do
    cellar :any
    sha256 "c1a4f23c7cf7c9e2491e0b340718c401732de2b4df86c5c2a92b2b8ba1fe868c" => :catalina
    sha256 "5e0fb460a0f30997819de1a56ed4a22d409e375d04571703d85e02f86458bb08" => :mojave
    sha256 "d8993453addc7f19eb38a939c1c7df757f64f08554636f52513a57333e3af44c" => :high_sierra
    sha256 "f25d70bfcc69413cb817b4a0f5cc26eed2e130c8b19004cbdca424cee2785d4a" => :sierra
  end

  depends_on "cmake" => :build

  def install
    inreplace "include/mbedtls/config.h" do |s|
      # enable pthread mutexes
      s.gsub! "//#define MBEDTLS_THREADING_PTHREAD", "#define MBEDTLS_THREADING_PTHREAD"
      # allow use of mutexes within mbed TLS
      s.gsub! "//#define MBEDTLS_THREADING_C", "#define MBEDTLS_THREADING_C"
    end

    system "cmake", "-DUSE_SHARED_MBEDTLS_LIBRARY=On", *std_cmake_args
    system "make"
    system "make", "install"

    # Why does Mbedtls ship with a "Hello World" executable. Let's remove that.
    rm_f bin/"hello"
    # Rename benchmark & selftest, which are awfully generic names.
    mv bin/"benchmark", bin/"mbedtls-benchmark"
    mv bin/"selftest", bin/"mbedtls-selftest"
    # Demonstration files shouldn't be in the main bin
    libexec.install bin/"mpi_demo"
  end

  test do
    (testpath/"testfile.txt").write("This is a test file")
    # Don't remove the space between the checksum and filename. It will break.
    expected_checksum = "e2d0fe1585a63ec6009c8016ff8dda8b17719a637405a4e23c0ff81339148249  testfile.txt"
    assert_equal expected_checksum, shell_output("#{bin}/generic_sum SHA256 testfile.txt").strip
  end
end