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require "hardware"
require "development_tools"
require "os/mac/version"
require "os/mac/xcode"
require "os/mac/xquartz"
require "os/mac/pathname"
require "os/mac/sdk"
require "os/mac/keg"

module OS
  module Mac
    module_function

    ::MacOS = self # rubocop:disable Style/ConstantName

    raise "Loaded OS::Mac on generic OS!" if ENV["HOMEBREW_TEST_GENERIC_OS"]

    # This can be compared to numerics, strings, or symbols
    # using the standard Ruby Comparable methods.
    def version
      @version ||= Version.new(full_version.to_s[/10\.\d+/])
    end

    # This can be compared to numerics, strings, or symbols
    # using the standard Ruby Comparable methods.
    def full_version
      @full_version ||= Version.new((ENV["HOMEBREW_MACOS_VERSION"] || ENV["HOMEBREW_OSX_VERSION"]).chomp)
    end

    def full_version=(version)
      @full_version = Version.new(version.chomp)
      @version = nil
    end

    def prerelease?
      # TODO: bump version when new OS is released
      version >= "10.14"
    end

    def outdated_release?
      # TODO: bump version when new OS is released
      version < "10.11"
    end

    def cat
      version.to_sym
    end

    def languages
      return @languages unless @languages.nil?

      @languages = Utils.popen_read("defaults", "read", ".GlobalPreferences", "AppleLanguages").scan(/[^ \n"(),]+/)

      if ENV["HOMEBREW_LANGUAGES"]
        @languages = ENV["HOMEBREW_LANGUAGES"].split(",") + @languages
      end

      if ARGV.value("language")
        @languages = ARGV.value("language").split(",") + @languages
      end

      @languages = @languages.uniq
    end

    def language
      languages.first
    end

    def active_developer_dir
      @active_developer_dir ||= Utils.popen_read("/usr/bin/xcode-select", "-print-path").strip
    end

    # If a specific SDK is requested
    #   a) The requested SDK is returned, if it's installed.
    #   b) If the requested SDK is not installed, the newest SDK (if any SDKs
    #      are available) is returned.
    #   c) If no SDKs are available, nil is returned.
    # If no specific SDK is requested
    #   a) For Xcode >= 7, the latest SDK is returned even if the latest SDK is
    #      named after a newer OS version than the running OS. The
    #      MACOSX_DEPLOYMENT_TARGET must be set to the OS for which you're
    #      actually building (usually the running OS version).
    #      https://github.com/Homebrew/legacy-homebrew/pull/50355
    #      https://developer.apple.com/library/ios/documentation/DeveloperTools/Conceptual/WhatsNewXcode/Articles/Introduction.html#//apple_ref/doc/uid/TP40004626
    #      Section "About SDKs and Simulator"
    #   b) For Xcode < 7, proceed as if the SDK for the running OS version had
    #      specifically been requested according to the rules above.

    def sdk(v = nil)
      @locator ||= SDKLocator.new
      begin
        sdk = if v.nil?
          (Xcode.version.to_i >= 7) ? @locator.latest_sdk : @locator.sdk_for(version)
        else
          @locator.sdk_for v
        end
      rescue SDKLocator::NoSDKError
        sdk = @locator.latest_sdk
      end
      # Only return an SDK older than the OS version if it was specifically requested
      sdk if v || (!sdk.nil? && sdk.version >= version)
    end

    # Returns the path to an SDK or nil, following the rules set by #sdk.
    def sdk_path(v = nil)
      s = sdk(v)
      s.path unless s.nil?
    end

    # See these issues for some history:
    # https://github.com/Homebrew/legacy-homebrew/issues/13
    # https://github.com/Homebrew/legacy-homebrew/issues/41
    # https://github.com/Homebrew/legacy-homebrew/issues/48
    def macports_or_fink
      paths = []

      # First look in the path because MacPorts is relocatable and Fink
      # may become relocatable in the future.
      %w[port fink].each do |ponk|
        path = which(ponk)
        paths << path unless path.nil?
      end

      # Look in the standard locations, because even if port or fink are
      # not in the path they can still break builds if the build scripts
      # have these paths baked in.
      %w[/sw/bin/fink /opt/local/bin/port].each do |ponk|
        path = Pathname.new(ponk)
        paths << path if path.exist?
      end

      # Finally, some users make their MacPorts or Fink directories
      # read-only in order to try out Homebrew, but this doesn't work as
      # some build scripts error out when trying to read from these now
      # unreadable paths.
      %w[/sw /opt/local].map { |p| Pathname.new(p) }.each do |path|
        paths << path if path.exist? && !path.readable?
      end

      paths.uniq
    end

    def prefer_64_bit?
      if ENV["HOMEBREW_PREFER_64_BIT"] && version == :leopard
        Hardware::CPU.is_64_bit?
      else
        Hardware::CPU.is_64_bit? && version > :leopard
      end
    end

    def preferred_arch
      if prefer_64_bit?
        Hardware::CPU.arch_64_bit
      else
        Hardware::CPU.arch_32_bit
      end
    end

    STANDARD_COMPILERS = {
      "2.0"   => { gcc_4_0_build: 4061 },
      "2.5"   => { gcc_4_0_build: 5370 },
      "3.1.4" => { gcc_4_0_build: 5493, gcc_4_2_build: 5577 },
      "3.2.6" => { gcc_4_0_build: 5494, gcc_4_2_build: 5666, clang: "1.7", clang_build: 77 },
      "4.0"   => { gcc_4_0_build: 5494, gcc_4_2_build: 5666, clang: "2.0", clang_build: 137 },
      "4.0.1" => { gcc_4_0_build: 5494, gcc_4_2_build: 5666, clang: "2.0", clang_build: 137 },
      "4.0.2" => { gcc_4_0_build: 5494, gcc_4_2_build: 5666, clang: "2.0", clang_build: 137 },
      "4.2"   => { clang: "3.0", clang_build: 211 },
      "4.3"   => { clang: "3.1", clang_build: 318 },
      "4.3.1" => { clang: "3.1", clang_build: 318 },
      "4.3.2" => { clang: "3.1", clang_build: 318 },
      "4.3.3" => { clang: "3.1", clang_build: 318 },
      "4.4"   => { clang: "4.0", clang_build: 421 },
      "4.4.1" => { clang: "4.0", clang_build: 421 },
      "4.5"   => { clang: "4.1", clang_build: 421 },
      "4.5.1" => { clang: "4.1", clang_build: 421 },
      "4.5.2" => { clang: "4.1", clang_build: 421 },
      "4.6"   => { clang: "4.2", clang_build: 425 },
      "4.6.1" => { clang: "4.2", clang_build: 425 },
      "4.6.2" => { clang: "4.2", clang_build: 425 },
      "4.6.3" => { clang: "4.2", clang_build: 425 },
      "5.0"   => { clang: "5.0", clang_build: 500 },
      "5.0.1" => { clang: "5.0", clang_build: 500 },
      "5.0.2" => { clang: "5.0", clang_build: 500 },
      "5.1"   => { clang: "5.1", clang_build: 503 },
      "5.1.1" => { clang: "5.1", clang_build: 503 },
      "6.0"   => { clang: "6.0", clang_build: 600 },
      "6.0.1" => { clang: "6.0", clang_build: 600 },
      "6.1"   => { clang: "6.0", clang_build: 600 },
      "6.1.1" => { clang: "6.0", clang_build: 600 },
      "6.2"   => { clang: "6.0", clang_build: 600 },
      "6.3"   => { clang: "6.1", clang_build: 602 },
      "6.3.1" => { clang: "6.1", clang_build: 602 },
      "6.3.2" => { clang: "6.1", clang_build: 602 },
      "6.4"   => { clang: "6.1", clang_build: 602 },
      "7.0"   => { clang: "7.0", clang_build: 700 },
      "7.0.1" => { clang: "7.0", clang_build: 700 },
      "7.1"   => { clang: "7.0", clang_build: 700 },
      "7.1.1" => { clang: "7.0", clang_build: 700 },
      "7.2"   => { clang: "7.0", clang_build: 700 },
      "7.2.1" => { clang: "7.0", clang_build: 700 },
      "7.3"   => { clang: "7.3", clang_build: 703 },
      "7.3.1" => { clang: "7.3", clang_build: 703 },
      "8.0"   => { clang: "8.0", clang_build: 800 },
      "8.1"   => { clang: "8.0", clang_build: 800 },
      "8.2"   => { clang: "8.0", clang_build: 800 },
      "8.2.1" => { clang: "8.0", clang_build: 800 },
      "8.3"   => { clang: "8.1", clang_build: 802 },
      "8.3.1" => { clang: "8.1", clang_build: 802 },
      "8.3.2" => { clang: "8.1", clang_build: 802 },
      "8.3.3" => { clang: "8.1", clang_build: 802 },
      "9.0"   => { clang: "9.0", clang_build: 900 },
    }.freeze

    def compilers_standard?
      STANDARD_COMPILERS.fetch(Xcode.version.to_s).all? do |method, build|
        send(:"#{method}_version") == build
      end
    rescue IndexError
      onoe <<-EOS.undent
        Homebrew doesn't know what compiler versions ship with your version
        of Xcode (#{Xcode.version}). Please `brew update` and if that doesn't
        help, file an issue with the output of `brew --config`:
          https://github.com/Homebrew/brew/issues

        Note that we only track stable, released versions of Xcode.

        Thanks!
      EOS
    end

    def app_with_bundle_id(*ids)
      path = mdfind(*ids).first
      Pathname.new(path) unless path.nil? || path.empty?
    end

    def mdfind(*ids)
      return [] unless OS.mac?
      (@mdfind ||= {}).fetch(ids) do
        @mdfind[ids] = Utils.popen_read("/usr/bin/mdfind", mdfind_query(*ids)).split("\n")
      end
    end

    def pkgutil_info(id)
      (@pkginfo ||= {}).fetch(id) do |key|
        @pkginfo[key] = Utils.popen_read("/usr/sbin/pkgutil", "--pkg-info", key).strip
      end
    end

    def mdfind_query(*ids)
      ids.map! { |id| "kMDItemCFBundleIdentifier == #{id}" }.join(" || ")
    end
  end
end