git_path

# File lib/rubygems/commands/environment_command.rb, line 167
  def git_path
    exts = ENV["PATHEXT"] ? ENV["PATHEXT"].split(";") : [""]
    ENV["PATH"].split(File::PATH_SEPARATOR).each do |path|
      exts.each do |ext|
        exe = File.join(path, "git#{ext}")
        return exe if File.executable?(exe) && !File.directory?(exe)
      end
    end

    return nil
  end