text: import os
  import re
  import django_extensions
  from django.conf import settings
  from django.db import connection
  from django.core.management.base import CommandError, LabelCommand, _make_writeable
  from django_extensions.utils.dia2django import dia2django
  from optparse import make_option
  
  class Command(LabelCommand):
      option_list = LabelCommand.option_list + (
          make_option('--template', '-t', action='store', dest='app_template',
              help='The path to the app template'),
          make_option('--parent_path', '-p', action='store', dest='parent_path',
              help='The parent path of the application to be created'),
          make_option('-d', action='store_true', dest='dia_parse',
              help='Generate model.py and admin.py from [APP_NAME].dia file'),
          make_option('--diagram', action='store', dest='dia_path',
              help='The diagram path of the app to be created. -d is implied'),
      )
  
      help = ("Creates an application directory structure for the specified "
          "application name.")
      args = "APP_NAME"
      label = 'application name'
  
      requires_model_validation = False
      can_import_settings = True
  
      def handle_label(self, label, **options):
          project_dir = os.getcwd()
          project_name = os.path.split(project_dir)[-1]
          app_name =label
          app_template = options.get('app_template') or os.path.join(django_extensions.__path__[0], 'conf', 'app_template')
          app_dir = os.path.join(options.get('parent_path') or project_dir, app_name)
          dia_path = options.get('dia_path') or os.path.join(project_dir, '%s.dia' % app_name)
  
          if not os.path.exists(app_template):
              raise CommandError("The template path, %r, does not exist." % app_template)
  
          if not re.search(r'^\w+$', label):
              raise CommandError("%r is not a valid application name. Please use only numbers, letters and underscores." % label)
  
          dia_parse = options.get('dia_path') or options.get('dia_parse')
          if dia_parse:
              if not os.path.exists(dia_path):
                  raise CommandError("The diagram path, %r, does not exist."
                      % dia_path)
              if app_name in settings.INSTALLED_APPS:
                  raise CommandError("The application %s should not be defined "
                      "in the settings file. Please remove %s now, and add it "
                      "after using this command." % (app_name, app_name))
              tables = [name for name in connection.introspection.table_names()
                  if name.startswith('%s_' % app_name)]
              if tables:
                  raise CommandError("%r application has tables in the database. "
                      "Please delete them." % app_name)
  
          try:
              os.makedirs(app_dir)
          except OSError, e:
              raise CommandError(e)
  
          copy_template(app_template, app_dir, project_name, app_name)
  
          if dia_parse:
              generate_models_and_admin(dia_path, app_dir, project_name, app_name)
              print "Application %r created." % app_name
              print "Please add now %r and any other dependent application in " \
                  "settings.INSTALLED_APPS, and run 'manage syncdb'" % app_name
  
  
  def copy_template(app_template, copy_to, project_name, app_name):
      """copies the specified template directory to the copy_to location"""
      import shutil
  
      # walks the template structure and copies it
      for d, subdirs, files in os.walk(app_template):
          relative_dir = d[len(app_template)+1:]
          if relative_dir and not os.path.exists(os.path.join(copy_to, relative_dir)):
              os.mkdir(os.path.join(copy_to, relative_dir))
          for i, subdir in enumerate(subdirs):
              if subdir.startswith('.'):
                  del subdirs[i]
          for f in files:
              if f.endswith('.pyc') or f.startswith('.DS_Store'):
                  continue
              path_old = os.path.join(d, f)
              path_new = os.path.join(copy_to, relative_dir, f.replace('app_name', app_name))
              if os.path.exists(path_new):
                  path_new = os.path.join(copy_to, relative_dir, f)
                  if os.path.exists(path_new):
                      continue
              path_new = path_new.rstrip(".tmpl")
              fp_old = open(path_old, 'r')
              fp_new = open(path_new, 'w')
              fp_new.write(fp_old.read().replace('{{ app_name }}', app_name).replace('{{ project_name }}', project_name))
              fp_old.close()
              fp_new.close()
              try:
                  shutil.copymode(path_old, path_new)
                  _make_writeable(path_new)
              except OSError:
                  sys.stderr.write(style.NOTICE("Notice: Couldn't set permission bits on %s. You're probably using an uncommon filesystem setup. No problem.\n" % path_new))
  
  
  def generate_models_and_admin(dia_path, app_dir, project_name, app_name):
      """Generates the models.py and admin.py files"""
  
      def format_text(string, indent=False):
          """format string in lines of 80 or less characters"""
          retval = ''
          while string:
              line = string[:77]
              last_space = line.rfind(' ')
              if last_space != -1 and len(string)>77:
                  retval += "%s \\\n" % string[:last_space]
                  string = string[last_space+1:]
              else:
                  retval += "%s\n" % string
                  string = ''
              if string and indent:
                  string = '    %s' % string
          return retval
  
      model_path = os.path.join(app_dir, 'models.py')
      admin_path = os.path.join(app_dir, 'admin.py')
  
      models_txt = 'from django.db import models\n' + dia2django(dia_path)
      open(model_path, 'w').write(models_txt)
  
      classes = re.findall('class (\w+)', models_txt)
      admin_txt = 'from django.contrib.admin import site, ModelAdmin\n' + \
          format_text('from %s.%s.models import %s' %
          (project_name, app_name, ', '.join(classes)), indent=True)
      admin_txt += format_text('\n\n%s' %
          '\n'.join(map((lambda t: 'site.register(%s)' %t), classes)))
      open(admin_path, 'w').write(admin_txt)
  