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require 'formula'

class NpmNotInstalled < Requirement
  fatal true

  def modules_folder
    "#{HOMEBREW_PREFIX}/lib/node_modules"
  end

  def message; <<-EOS.undent
    Beginning with 0.8.0, this recipe now comes with npm.
    It appears you already have npm installed at #{modules_folder}/npm.
    To use the npm that comes with this recipe, first uninstall npm with
    `npm uninstall npm -g`, then run this command again.

    If you would like to keep your installation of npm instead of
    using the one provided with homebrew, install the formula with
    the `--without-npm` option.
    EOS
  end

  satisfy :build_env => false do
    begin
      path = Pathname.new("#{modules_folder}/npm/bin/npm")
      path.realpath.to_s.include?(HOMEBREW_CELLAR)
    rescue Errno::ENOENT
      true
    end
  end
end

# Note that x.even are stable releases, x.odd are devel releases
class Node < Formula
  homepage 'http://nodejs.org/'
  url 'http://nodejs.org/dist/v0.10.23/node-v0.10.23.tar.gz'
  sha1 '8717942d1bdfa8902ce65cd33b4293d16b486c64'

  devel do
    url 'http://nodejs.org/dist/v0.11.9/node-v0.11.9.tar.gz'
    sha1 'b4fc0e38ccde4edae45db198f331499055d77ca2'
  end

  head 'https://github.com/joyent/node.git'

  option 'enable-debug', 'Build with debugger hooks'
  option 'without-npm', 'npm will not be installed'

  depends_on NpmNotInstalled unless build.without? 'npm'
  depends_on :python => ["2.6", :build]

  fails_with :llvm do
    build 2326
  end

  # fixes gyp's detection of system paths on CLT-only systems
  # merged upstream; can be removed the next time node syncs updates from gyp
  def patches
    # Latest versions of NodeJS stable have changed gyp's xcode_emulation, so
    # it requires a different patch than devel currently. This will probably go away soon
    if build.devel?
      'https://gist.github.com/bbhoss/7439859/raw/9037240e90c62ce462383469874d4c269e3ead0d/xcode_emulation.patch'
    else
      DATA
    end
  end

  def install
    args = %W{--prefix=#{prefix}}

    args << "--debug" if build.include? 'enable-debug'
    args << "--without-npm" if build.include? 'without-npm'

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

    unless build.include? 'without-npm'
      (lib/"node_modules/npm/npmrc").write("prefix = #{npm_prefix}\n")

      # Link npm manpages
      Pathname.glob("#{lib}/node_modules/npm/man/*").each do |man|
        dir = send(man.basename)
        man.children.each do |file|
          dir.install_symlink(file.relative_path_from(dir))
        end
      end
    end
  end

  def npm_prefix
    d = "#{HOMEBREW_PREFIX}/share/npm"
    if File.directory? d
      d
    else
      HOMEBREW_PREFIX.to_s
    end
  end

  def caveats
    if build.include? 'without-npm' then <<-end.undent
      Homebrew has NOT installed npm. If you later install it, you should supplement
      your NODE_PATH with the npm module folder:
          #{npm_prefix}/lib/node_modules
      end
    elsif not ENV['PATH'].split(':').include? "#{npm_prefix}/bin"; <<-end.undent
      Probably you should amend your PATH to include npm-installed binaries:
          #{npm_prefix}/bin
      end
    end
  end
end

__END__
diff --git a/tools/gyp/pylib/gyp/xcode_emulation.py b/tools/gyp/pylib/gyp/xcode_emulation.py
index 520dcc4d2e1055ff531662604ed71daf2513fd69..74c85cccbe689f817d83e6c7ad86a7028a27b92e 100644
--- a/tools/gyp/pylib/gyp/xcode_emulation.py
+++ b/tools/gyp/pylib/gyp/xcode_emulation.py
@@ -280,7 +280,14 @@ class XcodeSettings(object):
     return out.rstrip('\n')

   def _GetSdkVersionInfoItem(self, sdk, infoitem):
-    return self._GetStdout(['xcodebuild', '-version', '-sdk', sdk, infoitem])
+    # xcodebuild requires Xcode and can't run on Command Line Tools-only
+    # systems from 10.7 onward.
+    # Since the CLT has no SDK paths anyway, returning None is the
+    # most sensible route and should still do the right thing.
+    try:
+      return self._GetStdout(['xcodebuild', '-version', '-sdk', sdk, infoitem])
+    except:
+      pass

   def _SdkRoot(self, configname):
     if configname is None:
@@ -409,10 +416,11 @@ class XcodeSettings(object):

     cflags += self._Settings().get('WARNING_CFLAGS', [])

-    config = self.spec['configurations'][self.configname]
-    framework_dirs = config.get('mac_framework_dirs', [])
-    for directory in framework_dirs:
-      cflags.append('-F' + directory.replace('$(SDKROOT)', sdk_root))
+    if 'SDKROOT' in self._Settings():
+      config = self.spec['configurations'][self.configname]
+      framework_dirs = config.get('mac_framework_dirs', [])
+      for directory in framework_dirs:
+        cflags.append('-F' + directory.replace('$(SDKROOT)', sdk_root))

     self.configname = None
     return cflags
@@ -659,10 +667,11 @@ class XcodeSettings(object):
     for rpath in self._Settings().get('LD_RUNPATH_SEARCH_PATHS', []):
       ldflags.append('-Wl,-rpath,' + rpath)

-    config = self.spec['configurations'][self.configname]
-    framework_dirs = config.get('mac_framework_dirs', [])
-    for directory in framework_dirs:
-      ldflags.append('-F' + directory.replace('$(SDKROOT)', self._SdkPath()))
+    if 'SDKROOT' in self._Settings():
+      config = self.spec['configurations'][self.configname]
+      framework_dirs = config.get('mac_framework_dirs', [])
+      for directory in framework_dirs:
+        ldflags.append('-F' + directory.replace('$(SDKROOT)', self._SdkPath()))

     self.configname = None
     return ldflags
@@ -843,7 +852,10 @@ class XcodeSettings(object):
         l = '-l' + m.group(1)
       else:
         l = library
-    return l.replace('$(SDKROOT)', self._SdkPath(config_name))
+    if self._SdkPath():
+      return l.replace('$(SDKROOT)', self._SdkPath(config_name))
+    else:
+      return l

   def AdjustLibraries(self, libraries, config_name=None):
     """Transforms entries like 'Cocoa.framework' in libraries into entries like