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d818e0c9b2
This is the result of Christopher Medrela's 2013 Summer of Code project. Thanks also to Preston Holmes, Tim Graham, Anssi Kääriäinen, Florian Apolloner, and Alex Gaynor for review notes along the way. Also: Fixes #8579, fixes #3055, fixes #19844.
326 lines
13 KiB
Python
326 lines
13 KiB
Python
import cgi
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import errno
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import mimetypes
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import os
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import posixpath
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import re
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import shutil
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import stat
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import sys
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import tempfile
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from optparse import make_option
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from os import path
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import django
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from django.template import Template, Context
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from django.utils import archive
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from django.utils.six.moves.urllib.request import urlretrieve
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from django.utils._os import rmtree_errorhandler
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from django.core.management.base import BaseCommand, CommandError
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from django.core.management.utils import handle_extensions
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_drive_re = re.compile('^([a-z]):', re.I)
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_url_drive_re = re.compile('^([a-z])[:|]', re.I)
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class TemplateCommand(BaseCommand):
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"""
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Copies either a Django application layout template or a Django project
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layout template into the specified directory.
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:param style: A color style object (see django.core.management.color).
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:param app_or_project: The string 'app' or 'project'.
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:param name: The name of the application or project.
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:param directory: The directory to which the template should be copied.
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:param options: The additional variables passed to project or app templates
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"""
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args = "[name] [optional destination directory]"
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option_list = BaseCommand.option_list + (
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make_option('--template',
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action='store', dest='template',
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help='The path or URL to load the template from.'),
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make_option('--extension', '-e', dest='extensions',
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action='append', default=['py'],
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help='The file extension(s) to render (default: "py"). '
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'Separate multiple extensions with commas, or use '
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'-e multiple times.'),
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make_option('--name', '-n', dest='files',
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action='append', default=[],
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help='The file name(s) to render. '
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'Separate multiple extensions with commas, or use '
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'-n multiple times.')
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)
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requires_system_checks = False
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# Can't import settings during this command, because they haven't
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# necessarily been created.
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can_import_settings = False
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# The supported URL schemes
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url_schemes = ['http', 'https', 'ftp']
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# Can't perform any active locale changes during this command, because
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# setting might not be available at all.
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leave_locale_alone = True
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def handle(self, app_or_project, name, target=None, **options):
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self.app_or_project = app_or_project
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self.paths_to_remove = []
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self.verbosity = int(options.get('verbosity'))
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self.validate_name(name, app_or_project)
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# if some directory is given, make sure it's nicely expanded
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if target is None:
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top_dir = path.join(os.getcwd(), name)
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try:
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os.makedirs(top_dir)
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except OSError as e:
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if e.errno == errno.EEXIST:
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message = "'%s' already exists" % top_dir
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else:
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message = e
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raise CommandError(message)
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else:
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top_dir = os.path.abspath(path.expanduser(target))
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if not os.path.exists(top_dir):
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raise CommandError("Destination directory '%s' does not "
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"exist, please create it first." % top_dir)
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extensions = tuple(
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handle_extensions(options.get('extensions'), ignored=()))
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extra_files = []
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for file in options.get('files'):
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extra_files.extend(map(lambda x: x.strip(), file.split(',')))
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if self.verbosity >= 2:
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self.stdout.write("Rendering %s template files with "
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"extensions: %s\n" %
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(app_or_project, ', '.join(extensions)))
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self.stdout.write("Rendering %s template files with "
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"filenames: %s\n" %
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(app_or_project, ', '.join(extra_files)))
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base_name = '%s_name' % app_or_project
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base_subdir = '%s_template' % app_or_project
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base_directory = '%s_directory' % app_or_project
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if django.VERSION[-2] != 'final':
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docs_version = 'dev'
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else:
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docs_version = '%d.%d' % django.VERSION[:2]
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context = Context(dict(options, **{
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base_name: name,
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base_directory: top_dir,
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'docs_version': docs_version,
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}), autoescape=False)
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# Setup a stub settings environment for template rendering
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from django.conf import settings
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if not settings.configured:
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settings.configure()
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template_dir = self.handle_template(options.get('template'),
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base_subdir)
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prefix_length = len(template_dir) + 1
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for root, dirs, files in os.walk(template_dir):
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path_rest = root[prefix_length:]
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relative_dir = path_rest.replace(base_name, name)
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if relative_dir:
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target_dir = path.join(top_dir, relative_dir)
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if not path.exists(target_dir):
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os.mkdir(target_dir)
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for dirname in dirs[:]:
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if dirname.startswith('.') or dirname == '__pycache__':
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dirs.remove(dirname)
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for filename in files:
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if filename.endswith(('.pyo', '.pyc', '.py.class')):
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# Ignore some files as they cause various breakages.
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continue
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old_path = path.join(root, filename)
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new_path = path.join(top_dir, relative_dir,
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filename.replace(base_name, name))
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if path.exists(new_path):
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raise CommandError("%s already exists, overlaying a "
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"project or app into an existing "
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"directory won't replace conflicting "
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"files" % new_path)
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# Only render the Python files, as we don't want to
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# accidentally render Django templates files
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with open(old_path, 'rb') as template_file:
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content = template_file.read()
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if filename.endswith(extensions) or filename in extra_files:
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content = content.decode('utf-8')
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template = Template(content)
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content = template.render(context)
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content = content.encode('utf-8')
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with open(new_path, 'wb') as new_file:
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new_file.write(content)
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if self.verbosity >= 2:
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self.stdout.write("Creating %s\n" % new_path)
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try:
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shutil.copymode(old_path, new_path)
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self.make_writeable(new_path)
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except OSError:
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self.stderr.write(
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"Notice: Couldn't set permission bits on %s. You're "
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"probably using an uncommon filesystem setup. No "
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"problem." % new_path, self.style.NOTICE)
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if self.paths_to_remove:
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if self.verbosity >= 2:
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self.stdout.write("Cleaning up temporary files.\n")
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for path_to_remove in self.paths_to_remove:
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if path.isfile(path_to_remove):
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os.remove(path_to_remove)
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else:
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shutil.rmtree(path_to_remove,
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onerror=rmtree_errorhandler)
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def handle_template(self, template, subdir):
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"""
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Determines where the app or project templates are.
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Use django.__path__[0] as the default because we don't
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know into which directory Django has been installed.
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"""
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if template is None:
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return path.join(django.__path__[0], 'conf', subdir)
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else:
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if template.startswith('file://'):
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template = template[7:]
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expanded_template = path.expanduser(template)
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expanded_template = path.normpath(expanded_template)
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if path.isdir(expanded_template):
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return expanded_template
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if self.is_url(template):
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# downloads the file and returns the path
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absolute_path = self.download(template)
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else:
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absolute_path = path.abspath(expanded_template)
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if path.exists(absolute_path):
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return self.extract(absolute_path)
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raise CommandError("couldn't handle %s template %s." %
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(self.app_or_project, template))
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def validate_name(self, name, app_or_project):
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if name is None:
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raise CommandError("you must provide %s %s name" % (
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"an" if app_or_project == "app" else "a", app_or_project))
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# If it's not a valid directory name.
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if not re.search(r'^[_a-zA-Z]\w*$', name):
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# Provide a smart error message, depending on the error.
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if not re.search(r'^[_a-zA-Z]', name):
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message = 'make sure the name begins with a letter or underscore'
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else:
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message = 'use only numbers, letters and underscores'
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raise CommandError("%r is not a valid %s name. Please %s." %
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(name, app_or_project, message))
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def download(self, url):
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"""
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Downloads the given URL and returns the file name.
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"""
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def cleanup_url(url):
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tmp = url.rstrip('/')
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filename = tmp.split('/')[-1]
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if url.endswith('/'):
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display_url = tmp + '/'
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else:
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display_url = url
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return filename, display_url
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prefix = 'django_%s_template_' % self.app_or_project
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tempdir = tempfile.mkdtemp(prefix=prefix, suffix='_download')
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self.paths_to_remove.append(tempdir)
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filename, display_url = cleanup_url(url)
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if self.verbosity >= 2:
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self.stdout.write("Downloading %s\n" % display_url)
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try:
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the_path, info = urlretrieve(url, path.join(tempdir, filename))
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except IOError as e:
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raise CommandError("couldn't download URL %s to %s: %s" %
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(url, filename, e))
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used_name = the_path.split('/')[-1]
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# Trying to get better name from response headers
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content_disposition = info.get('content-disposition')
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if content_disposition:
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_, params = cgi.parse_header(content_disposition)
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guessed_filename = params.get('filename') or used_name
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else:
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guessed_filename = used_name
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# Falling back to content type guessing
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ext = self.splitext(guessed_filename)[1]
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content_type = info.get('content-type')
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if not ext and content_type:
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ext = mimetypes.guess_extension(content_type)
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if ext:
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guessed_filename += ext
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# Move the temporary file to a filename that has better
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# chances of being recognnized by the archive utils
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if used_name != guessed_filename:
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guessed_path = path.join(tempdir, guessed_filename)
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shutil.move(the_path, guessed_path)
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return guessed_path
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# Giving up
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return the_path
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def splitext(self, the_path):
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"""
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Like os.path.splitext, but takes off .tar, too
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"""
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base, ext = posixpath.splitext(the_path)
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if base.lower().endswith('.tar'):
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ext = base[-4:] + ext
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base = base[:-4]
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return base, ext
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def extract(self, filename):
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"""
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Extracts the given file to a temporarily and returns
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the path of the directory with the extracted content.
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"""
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prefix = 'django_%s_template_' % self.app_or_project
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tempdir = tempfile.mkdtemp(prefix=prefix, suffix='_extract')
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self.paths_to_remove.append(tempdir)
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if self.verbosity >= 2:
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self.stdout.write("Extracting %s\n" % filename)
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try:
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archive.extract(filename, tempdir)
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return tempdir
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except (archive.ArchiveException, IOError) as e:
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raise CommandError("couldn't extract file %s to %s: %s" %
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(filename, tempdir, e))
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def is_url(self, template):
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"""
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Returns True if the name looks like a URL
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"""
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if ':' not in template:
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return False
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scheme = template.split(':', 1)[0].lower()
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return scheme in self.url_schemes
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def make_writeable(self, filename):
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"""
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Make sure that the file is writeable.
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Useful if our source is read-only.
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"""
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if sys.platform.startswith('java'):
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# On Jython there is no os.access()
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return
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if not os.access(filename, os.W_OK):
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st = os.stat(filename)
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new_permissions = stat.S_IMODE(st.st_mode) | stat.S_IWUSR
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os.chmod(filename, new_permissions)
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