import os

import sys

from django.core.management.base import CommandError, AppCommand, _make_writeable

class Command(AppCommand):

    help = ("Creates a Django jobs command directory structure for the given app name in the current directory.")

    args = "[appname]"

    label = 'application name'

    requires_model_validation = False

    # Can't import settings during this command, because they haven't

    # necessarily been created.

    can_import_settings = True

    def handle_app(self, app, **options):

        app_dir = os.path.dirname(app.__file__)

        copy_template('jobs_template', app_dir)

def copy_template(template_name, copy_to):

    """copies the specified template directory to the copy_to location"""

    import django_extensions

    import re

    import shutil

    template_dir = os.path.join(django_extensions.__path__[0], 'conf', template_name)

    # walks the template structure and copies it

    for d, subdirs, files in os.walk(template_dir):

        relative_dir = d[len(template_dir)+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)

            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())

            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))