1 files changed, 173 insertions, 0 deletions
diff --git a/Library/Homebrew/os/mac/xcode.rb b/Library/Homebrew/os/mac/xcode.rb
new file mode 100644
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+++ b/Library/Homebrew/os/mac/xcode.rb
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+module MacOS::Xcode extend self
+
+  V4_BUNDLE_ID = "com.apple.dt.Xcode"
+  V3_BUNDLE_ID = "com.apple.Xcode"
+  V4_BUNDLE_PATH = Pathname.new("/Applications/Xcode.app")
+  V3_BUNDLE_PATH = Pathname.new("/Developer/Applications/Xcode.app")
+
+  # Locate the "current Xcode folder" via xcode-select. See:
+  # man xcode-select
+  # NOTE!! use Xcode.prefix rather than this generally!
+  def folder
+    @folder ||= `xcode-select -print-path 2>/dev/null`.strip
+  end
+
+  # Xcode 4.3 tools hang if "/" is set
+  def bad_xcode_select_path?
+    folder == "/"
+  end
+
+  def latest_version
+    case MacOS.version
+      when 10.5 then "3.1.4"
+      when 10.6 then "3.2.6"
+    else
+      if MacOS.version >= 10.7
+        "4.6"
+      else
+        raise "Mac OS X `#{MacOS.version}' is invalid"
+      end
+    end
+  end
+
+  def prefix
+    @prefix ||= begin
+      path = Pathname.new(folder)
+      if path.absolute? and (path/'usr/bin/make').executable?
+        path
+      elsif File.executable? '/Developer/usr/bin/make'
+        # we do this to support cowboys who insist on installing
+        # only a subset of Xcode
+        Pathname.new '/Developer'
+      elsif (V4_BUNDLE_PATH/'Contents/Developer/usr/bin/make').executable?
+        # fallback for broken Xcode 4.3 installs
+        V4_BUNDLE_PATH/'Contents/Developer'
+      else
+        # Ask Spotlight where Xcode is. If the user didn't install the
+        # helper tools and installed Xcode in a non-conventional place, this
+        # is our only option. See: http://superuser.com/questions/390757
+        path = MacOS.app_with_bundle_id(V4_BUNDLE_ID) ||
+          MacOS.app_with_bundle_id(V3_BUNDLE_ID)
+
+        unless path.nil?
+          path += "Contents/Developer"
+          path if (path/'usr/bin/make').executable?
+        end
+      end
+    end
+  end
+
+  def installed?
+    not prefix.nil?
+  end
+
+  def version
+    # may return a version string
+    # that is guessed based on the compiler, so do not
+    # use it in order to check if Xcode is installed.
+    @version ||= uncached_version
+  end
+
+  def uncached_version
+    # This is a separate function as you can't cache the value out of a block
+    # if return is used in the middle, which we do many times in here.
+
+    return "0" unless MACOS
+
+    # this shortcut makes version work for people who don't realise you
+    # need to install the CLI tools
+    xcode43build = V4_BUNDLE_PATH/'Contents/Developer/usr/bin/xcodebuild'
+    if xcode43build.file?
+      `#{xcode43build} -version 2>/dev/null` =~ /Xcode (\d(\.\d)*)/
+      return $1 if $1
+    end
+
+    # Xcode 4.3 xc* tools hang indefinately if xcode-select path is set thus
+    raise if bad_xcode_select_path?
+
+    raise unless which "xcodebuild"
+    `xcodebuild -version 2>/dev/null` =~ /Xcode (\d(\.\d)*)/
+    raise if $1.nil? or not $?.success?
+    $1
+  rescue
+    # For people who's xcode-select is unset, or who have installed
+    # xcode-gcc-installer or whatever other combinations we can try and
+    # supprt. See https://github.com/mxcl/homebrew/wiki/Xcode
+    case MacOS.llvm_build_version.to_i
+    when 1..2063 then "3.1.0"
+    when 2064..2065 then "3.1.4"
+    when 2366..2325
+      # we have no data for this range so we are guessing
+      "3.2.0"
+    when 2326
+      # also applies to "3.2.3"
+      "3.2.4"
+    when 2327..2333 then "3.2.5"
+    when 2335
+      # this build number applies to 3.2.6, 4.0 and 4.1
+      # https://github.com/mxcl/homebrew/wiki/Xcode
+      "4.0"
+    else
+      case (MacOS.clang_version.to_f * 10).to_i
+      when 0       then "dunno"
+      when 1..14   then "3.2.2"
+      when 15      then "3.2.4"
+      when 16      then "3.2.5"
+      when 17..20  then "4.0"
+      when 21      then "4.1"
+      when 22..30  then "4.2"
+      when 31      then "4.3"
+      when 40      then "4.4"
+      when 41      then "4.5"
+      when 42      then "4.6"
+      else "4.6"
+      end
+    end
+  end
+
+  def provides_autotools?
+    version.to_f < 4.3
+  end
+
+  def provides_gcc?
+    version.to_f < 4.3
+  end
+
+  def default_prefix?
+    if version.to_f < 4.3
+      %r{^/Developer} === prefix
+    else
+      %r{^/Applications/Xcode.app} === prefix
+    end
+  end
+end
+
+module MacOS::CLT extend self
+  STANDALONE_PKG_ID = "com.apple.pkg.DeveloperToolsCLILeo"
+  FROM_XCODE_PKG_ID = "com.apple.pkg.DeveloperToolsCLI"
+
+  # This is true ift he standard UNIX tools are present under /usr. For
+  # Xcode < 4.3, this is the standard location. Otherwise, it means that
+  # the user has installed the "Command Line Tools for Xcode" package.
+  def installed?
+    MacOS.dev_tools_path == Pathname.new("/usr/bin")
+  end
+
+  def latest_version?
+    `/usr/bin/clang --version` =~ %r{clang-(\d+)\.(\d+)\.(\d+)}
+    $1.to_i >= 425 and $3.to_i >= 24
+  end
+
+  def version
+    # The pkgutils calls are slow, don't repeat if no CLT installed.
+    return @version if @version_determined
+
+    @version_determined = true
+    # Version string (a pretty damn long one) of the CLT package.
+    # Note, that different ways to install the CLTs lead to different
+    # version numbers.
+    @version ||= [STANDALONE_PKG_ID, FROM_XCODE_PKG_ID].find do |id|
+      MacOS.pkgutil_info(id) =~ /version: (.+)$/
+    end && $1
+  end
+end