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507 lines
10 KiB
Python
507 lines
10 KiB
Python
#!coding: utf-8
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import os
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import shutil
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import textwrap
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from sqlalchemy.testing import engines
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from sqlalchemy.testing import provision
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from .. import util
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from ..script import Script
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from ..script import ScriptDirectory
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from ..util.compat import get_current_bytecode_suffixes
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from ..util.compat import has_pep3147
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from ..util.compat import u
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def _get_staging_directory():
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if provision.FOLLOWER_IDENT:
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return "scratch_%s" % provision.FOLLOWER_IDENT
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else:
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return "scratch"
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def staging_env(create=True, template="generic", sourceless=False):
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from alembic import command, script
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cfg = _testing_config()
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if create:
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path = os.path.join(_get_staging_directory(), "scripts")
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assert not os.path.exists(path), (
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"staging directory %s already exists; poor cleanup?" % path
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)
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command.init(cfg, path, template=template)
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if sourceless:
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try:
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# do an import so that a .pyc/.pyo is generated.
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util.load_python_file(path, "env.py")
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except AttributeError:
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# we don't have the migration context set up yet
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# so running the .env py throws this exception.
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# theoretically we could be using py_compiler here to
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# generate .pyc/.pyo without importing but not really
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# worth it.
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pass
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assert sourceless in (
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"pep3147_envonly",
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"simple",
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"pep3147_everything",
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), sourceless
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make_sourceless(
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os.path.join(path, "env.py"),
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"pep3147" if "pep3147" in sourceless else "simple",
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)
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sc = script.ScriptDirectory.from_config(cfg)
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return sc
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def clear_staging_env():
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from sqlalchemy.testing import engines
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engines.testing_reaper.close_all()
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shutil.rmtree(_get_staging_directory(), True)
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def script_file_fixture(txt):
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dir_ = os.path.join(_get_staging_directory(), "scripts")
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path = os.path.join(dir_, "script.py.mako")
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with open(path, "w") as f:
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f.write(txt)
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def env_file_fixture(txt):
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dir_ = os.path.join(_get_staging_directory(), "scripts")
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txt = (
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"""
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from alembic import context
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config = context.config
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"""
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+ txt
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)
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path = os.path.join(dir_, "env.py")
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pyc_path = util.pyc_file_from_path(path)
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if pyc_path:
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os.unlink(pyc_path)
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with open(path, "w") as f:
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f.write(txt)
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def _sqlite_file_db(tempname="foo.db"):
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dir_ = os.path.join(_get_staging_directory(), "scripts")
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url = "sqlite:///%s/%s" % (dir_, tempname)
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return engines.testing_engine(url=url)
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def _sqlite_testing_config(sourceless=False):
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dir_ = os.path.join(_get_staging_directory(), "scripts")
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url = "sqlite:///%s/foo.db" % dir_
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return _write_config_file(
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"""
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[alembic]
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script_location = %s
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sqlalchemy.url = %s
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sourceless = %s
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[loggers]
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keys = root
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[handlers]
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keys = console
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[logger_root]
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level = WARN
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handlers = console
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qualname =
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[handler_console]
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class = StreamHandler
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args = (sys.stderr,)
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level = NOTSET
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formatter = generic
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[formatters]
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keys = generic
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[formatter_generic]
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format = %%(levelname)-5.5s [%%(name)s] %%(message)s
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datefmt = %%H:%%M:%%S
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"""
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% (dir_, url, "true" if sourceless else "false")
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)
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def _multi_dir_testing_config(sourceless=False, extra_version_location=""):
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dir_ = os.path.join(_get_staging_directory(), "scripts")
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url = "sqlite:///%s/foo.db" % dir_
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return _write_config_file(
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"""
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[alembic]
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script_location = %s
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sqlalchemy.url = %s
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sourceless = %s
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version_locations = %%(here)s/model1/ %%(here)s/model2/ %%(here)s/model3/ %s
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[loggers]
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keys = root
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[handlers]
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keys = console
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[logger_root]
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level = WARN
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handlers = console
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qualname =
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[handler_console]
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class = StreamHandler
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args = (sys.stderr,)
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level = NOTSET
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formatter = generic
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[formatters]
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keys = generic
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[formatter_generic]
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format = %%(levelname)-5.5s [%%(name)s] %%(message)s
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datefmt = %%H:%%M:%%S
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"""
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% (
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dir_,
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url,
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"true" if sourceless else "false",
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extra_version_location,
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)
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)
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def _no_sql_testing_config(dialect="postgresql", directives=""):
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"""use a postgresql url with no host so that
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connections guaranteed to fail"""
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dir_ = os.path.join(_get_staging_directory(), "scripts")
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return _write_config_file(
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"""
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[alembic]
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script_location = %s
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sqlalchemy.url = %s://
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%s
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[loggers]
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keys = root
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[handlers]
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keys = console
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[logger_root]
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level = WARN
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handlers = console
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qualname =
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[handler_console]
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class = StreamHandler
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args = (sys.stderr,)
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level = NOTSET
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formatter = generic
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[formatters]
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keys = generic
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[formatter_generic]
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format = %%(levelname)-5.5s [%%(name)s] %%(message)s
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datefmt = %%H:%%M:%%S
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"""
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% (dir_, dialect, directives)
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)
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def _write_config_file(text):
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cfg = _testing_config()
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with open(cfg.config_file_name, "w") as f:
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f.write(text)
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return cfg
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def _testing_config():
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from alembic.config import Config
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if not os.access(_get_staging_directory(), os.F_OK):
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os.mkdir(_get_staging_directory())
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return Config(os.path.join(_get_staging_directory(), "test_alembic.ini"))
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def write_script(
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scriptdir, rev_id, content, encoding="ascii", sourceless=False
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):
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old = scriptdir.revision_map.get_revision(rev_id)
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path = old.path
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content = textwrap.dedent(content)
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if encoding:
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content = content.encode(encoding)
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with open(path, "wb") as fp:
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fp.write(content)
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pyc_path = util.pyc_file_from_path(path)
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if pyc_path:
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os.unlink(pyc_path)
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script = Script._from_path(scriptdir, path)
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old = scriptdir.revision_map.get_revision(script.revision)
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if old.down_revision != script.down_revision:
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raise Exception(
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"Can't change down_revision " "on a refresh operation."
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)
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scriptdir.revision_map.add_revision(script, _replace=True)
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if sourceless:
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make_sourceless(
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path, "pep3147" if sourceless == "pep3147_everything" else "simple"
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)
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def make_sourceless(path, style):
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import py_compile
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py_compile.compile(path)
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if style == "simple" and has_pep3147():
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pyc_path = util.pyc_file_from_path(path)
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suffix = get_current_bytecode_suffixes()[0]
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filepath, ext = os.path.splitext(path)
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simple_pyc_path = filepath + suffix
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shutil.move(pyc_path, simple_pyc_path)
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pyc_path = simple_pyc_path
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elif style == "pep3147" and not has_pep3147():
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raise NotImplementedError()
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else:
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assert style in ("pep3147", "simple")
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pyc_path = util.pyc_file_from_path(path)
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assert os.access(pyc_path, os.F_OK)
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os.unlink(path)
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def three_rev_fixture(cfg):
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a = util.rev_id()
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b = util.rev_id()
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c = util.rev_id()
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script = ScriptDirectory.from_config(cfg)
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script.generate_revision(a, "revision a", refresh=True, head="base")
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write_script(
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script,
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a,
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"""\
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"Rev A"
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revision = '%s'
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down_revision = None
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from alembic import op
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def upgrade():
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op.execute("CREATE STEP 1")
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def downgrade():
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op.execute("DROP STEP 1")
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"""
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% a,
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)
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script.generate_revision(b, "revision b", refresh=True, head=a)
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write_script(
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script,
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b,
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u(
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"""# coding: utf-8
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"Rev B, méil, %3"
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revision = '{}'
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down_revision = '{}'
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from alembic import op
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def upgrade():
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op.execute("CREATE STEP 2")
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def downgrade():
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op.execute("DROP STEP 2")
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"""
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).format(b, a),
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encoding="utf-8",
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)
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script.generate_revision(c, "revision c", refresh=True, head=b)
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write_script(
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script,
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c,
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"""\
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"Rev C"
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revision = '%s'
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down_revision = '%s'
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from alembic import op
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def upgrade():
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op.execute("CREATE STEP 3")
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def downgrade():
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op.execute("DROP STEP 3")
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"""
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% (c, b),
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)
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return a, b, c
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def multi_heads_fixture(cfg, a, b, c):
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"""Create a multiple head fixture from the three-revs fixture"""
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# a->b->c
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# -> d -> e
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# -> f
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d = util.rev_id()
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e = util.rev_id()
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f = util.rev_id()
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script = ScriptDirectory.from_config(cfg)
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script.generate_revision(
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d, "revision d from b", head=b, splice=True, refresh=True
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)
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write_script(
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script,
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d,
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"""\
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"Rev D"
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revision = '%s'
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down_revision = '%s'
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from alembic import op
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def upgrade():
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op.execute("CREATE STEP 4")
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def downgrade():
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op.execute("DROP STEP 4")
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"""
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% (d, b),
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)
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script.generate_revision(
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e, "revision e from d", head=d, splice=True, refresh=True
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)
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write_script(
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script,
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e,
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"""\
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"Rev E"
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revision = '%s'
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down_revision = '%s'
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from alembic import op
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def upgrade():
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op.execute("CREATE STEP 5")
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def downgrade():
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op.execute("DROP STEP 5")
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"""
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% (e, d),
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)
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script.generate_revision(
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f, "revision f from b", head=b, splice=True, refresh=True
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)
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write_script(
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script,
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f,
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"""\
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"Rev F"
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revision = '%s'
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down_revision = '%s'
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from alembic import op
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def upgrade():
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op.execute("CREATE STEP 6")
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def downgrade():
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op.execute("DROP STEP 6")
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"""
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% (f, b),
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)
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return d, e, f
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def _multidb_testing_config(engines):
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"""alembic.ini fixture to work exactly with the 'multidb' template"""
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dir_ = os.path.join(_get_staging_directory(), "scripts")
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databases = ", ".join(engines.keys())
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engines = "\n\n".join(
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"[%s]\n" "sqlalchemy.url = %s" % (key, value.url)
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for key, value in engines.items()
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)
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return _write_config_file(
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"""
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[alembic]
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script_location = %s
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sourceless = false
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databases = %s
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%s
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[loggers]
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keys = root
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[handlers]
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keys = console
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|
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[logger_root]
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level = WARN
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handlers = console
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qualname =
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|
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[handler_console]
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class = StreamHandler
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args = (sys.stderr,)
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level = NOTSET
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formatter = generic
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|
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[formatters]
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keys = generic
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|
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[formatter_generic]
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format = %%(levelname)-5.5s [%%(name)s] %%(message)s
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datefmt = %%H:%%M:%%S
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"""
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% (dir_, databases, engines)
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)
|