109 lines
3.4 KiB
Python
109 lines
3.4 KiB
Python
import os
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from subprocess import PIPE, Popen
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from django.apps import apps as installed_apps
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from django.utils.crypto import get_random_string
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from django.utils.encoding import DEFAULT_LOCALE_ENCODING, force_text
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from .base import CommandError
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def popen_wrapper(args, os_err_exc_type=CommandError, stdout_encoding='utf-8'):
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"""
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Friendly wrapper around Popen.
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Return stdout output, stderr output, and OS status code.
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"""
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try:
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p = Popen(args, shell=False, stdout=PIPE, stderr=PIPE, close_fds=os.name != 'nt')
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except OSError as err:
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raise os_err_exc_type('Error executing %s' % args[0]) from err
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output, errors = p.communicate()
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return (
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force_text(output, stdout_encoding, strings_only=True, errors='strict'),
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force_text(errors, DEFAULT_LOCALE_ENCODING, strings_only=True, errors='replace'),
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p.returncode
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)
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def handle_extensions(extensions):
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"""
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Organize multiple extensions that are separated with commas or passed by
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using --extension/-e multiple times.
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For example: running 'django-admin makemessages -e js,txt -e xhtml -a'
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would result in an extension list: ['.js', '.txt', '.xhtml']
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>>> handle_extensions(['.html', 'html,js,py,py,py,.py', 'py,.py'])
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{'.html', '.js', '.py'}
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>>> handle_extensions(['.html, txt,.tpl'])
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{'.html', '.tpl', '.txt'}
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"""
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ext_list = []
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for ext in extensions:
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ext_list.extend(ext.replace(' ', '').split(','))
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for i, ext in enumerate(ext_list):
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if not ext.startswith('.'):
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ext_list[i] = '.%s' % ext_list[i]
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return set(ext_list)
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def find_command(cmd, path=None, pathext=None):
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if path is None:
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path = os.environ.get('PATH', '').split(os.pathsep)
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if isinstance(path, str):
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path = [path]
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# check if there are funny path extensions for executables, e.g. Windows
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if pathext is None:
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pathext = os.environ.get('PATHEXT', '.COM;.EXE;.BAT;.CMD').split(os.pathsep)
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# don't use extensions if the command ends with one of them
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for ext in pathext:
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if cmd.endswith(ext):
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pathext = ['']
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break
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# check if we find the command on PATH
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for p in path:
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f = os.path.join(p, cmd)
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if os.path.isfile(f):
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return f
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for ext in pathext:
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fext = f + ext
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if os.path.isfile(fext):
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return fext
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return None
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def get_random_secret_key():
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"""
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Return a 50 character random string usable as a SECRET_KEY setting value.
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"""
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chars = 'abcdefghijklmnopqrstuvwxyz0123456789!@#$%^&*(-_=+)'
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return get_random_string(50, chars)
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def parse_apps_and_model_labels(labels):
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"""
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Parse a list of "app_label.ModelName" or "app_label" strings into actual
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objects and return a two-element tuple:
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(set of model classes, set of app_configs).
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Raise a CommandError if some specified models or apps don't exist.
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"""
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apps = set()
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models = set()
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for label in labels:
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if '.' in label:
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try:
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model = installed_apps.get_model(label)
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except LookupError:
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raise CommandError('Unknown model: %s' % label)
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models.add(model)
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else:
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try:
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app_config = installed_apps.get_app_config(label)
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except LookupError as e:
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raise CommandError(str(e))
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apps.add(app_config)
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return models, apps
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