mirror of
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122 lines
4.1 KiB
Python
122 lines
4.1 KiB
Python
# -*- coding: utf-8 -*-
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import os
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import re
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import hashlib
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from typing import Any, List, Optional
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from importlib import import_module
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from typing import Text
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from six.moves import cStringIO as StringIO
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from django.db import connections, DEFAULT_DB_ALIAS
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from django.db.utils import OperationalError
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from django.apps import apps
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from django.core.management import call_command
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from django.utils.module_loading import module_has_submodule
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FILENAME_SPLITTER = re.compile('[\W\-_]')
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def database_exists(database_name, **options):
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# type: (Text, **Any) -> bool
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db = options.get('database', DEFAULT_DB_ALIAS)
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try:
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connection = connections[db]
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with connection.cursor() as cursor:
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cursor.execute("SELECT 1 from pg_database WHERE datname='{}';".format(database_name))
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return_value = bool(cursor.fetchone())
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connections.close_all()
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return return_value
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except OperationalError:
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return False
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def get_migration_status(**options):
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# type: (**Any) -> str
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verbosity = options.get('verbosity', 1)
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for app_config in apps.get_app_configs():
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if module_has_submodule(app_config.module, "management"):
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import_module('.management', app_config.name)
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app_labels = [options['app_label']] if options.get('app_label') else None
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db = options.get('database', DEFAULT_DB_ALIAS)
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out = StringIO()
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call_command(
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'showmigrations',
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'--list',
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app_labels=app_labels,
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database=db,
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no_color=options.get('no_color', False),
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settings=options.get('settings', os.environ['DJANGO_SETTINGS_MODULE']),
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stdout=out,
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traceback=options.get('traceback', True),
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verbosity=verbosity,
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)
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connections.close_all()
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out.seek(0)
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output = out.read()
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return re.sub('\x1b\[(1|0)m', '', output)
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def are_migrations_the_same(migration_file, **options):
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# type: (Text, **Any) -> bool
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if not os.path.exists(migration_file):
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return False
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with open(migration_file) as f:
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migration_content = f.read()
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return migration_content == get_migration_status(**options)
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def _get_hash_file_path(source_file_path, status_dir):
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# type: (str, str) -> str
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basename = os.path.basename(source_file_path)
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filename = '_'.join(FILENAME_SPLITTER.split(basename)).lower()
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return os.path.join(status_dir, filename)
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def _check_hash(target_hash_file, status_dir):
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# type: (str, str) -> bool
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"""
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This function has a side effect of creating a new hash file or
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updating the old hash file.
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"""
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source_hash_file = _get_hash_file_path(target_hash_file, status_dir)
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with open(target_hash_file) as f:
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target_hash_content = hashlib.sha1(f.read().encode('utf8')).hexdigest()
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if not os.path.exists(source_hash_file):
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source_hash_content = None
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else:
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with open(source_hash_file) as f:
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source_hash_content = f.read().strip()
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with open(source_hash_file, 'w') as f:
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f.write(target_hash_content)
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return source_hash_content == target_hash_content
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def is_template_database_current(
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database_name='zulip_test_template',
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migration_status='var/migration-status',
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settings='zproject.test_settings',
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status_dir='var/test_db_status',
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check_files=None):
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# type: (str, str, str, str, Optional[List[str]]) -> bool
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# Using str type for check_files because re.split doesn't accept unicode
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if check_files is None:
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check_files = [
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'zilencer/management/commands/populate_db.py',
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'tools/setup/postgres-init-test-db',
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'tools/setup/postgres-init-dev-db',
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]
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if not os.path.exists(status_dir):
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os.mkdir(status_dir)
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if database_exists(database_name):
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# To ensure Python evaluates all the hash tests (and thus creates the
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# hash files about the current state), we evaluate them in a
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# list and then process the result
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hash_status = all([_check_hash(fn, status_dir) for fn in check_files])
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return are_migrations_the_same(migration_status, settings=settings) and hash_status
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return False
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