266 lines
8.3 KiB
Python
266 lines
8.3 KiB
Python
"""Version info, help messages, tracing configuration."""
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import os
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import sys
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from argparse import Action
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from typing import List
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from typing import Optional
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from typing import Union
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import pytest
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from _pytest.config import Config
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from _pytest.config import ExitCode
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from _pytest.config import PrintHelp
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from _pytest.config.argparsing import Parser
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class HelpAction(Action):
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"""An argparse Action that will raise an exception in order to skip the
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rest of the argument parsing when --help is passed.
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This prevents argparse from quitting due to missing required arguments
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when any are defined, for example by ``pytest_addoption``.
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This is similar to the way that the builtin argparse --help option is
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implemented by raising SystemExit.
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"""
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def __init__(self, option_strings, dest=None, default=False, help=None):
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super().__init__(
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option_strings=option_strings,
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dest=dest,
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const=True,
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default=default,
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nargs=0,
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help=help,
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)
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def __call__(self, parser, namespace, values, option_string=None):
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setattr(namespace, self.dest, self.const)
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# We should only skip the rest of the parsing after preparse is done.
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if getattr(parser._parser, "after_preparse", False):
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raise PrintHelp
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def pytest_addoption(parser: Parser) -> None:
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group = parser.getgroup("debugconfig")
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group.addoption(
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"--version",
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"-V",
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action="count",
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default=0,
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dest="version",
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help="Display pytest version and information about plugins. "
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"When given twice, also display information about plugins.",
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)
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group._addoption(
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"-h",
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"--help",
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action=HelpAction,
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dest="help",
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help="Show help message and configuration info",
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)
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group._addoption(
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"-p",
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action="append",
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dest="plugins",
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default=[],
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metavar="name",
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help="Early-load given plugin module name or entry point (multi-allowed). "
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"To avoid loading of plugins, use the `no:` prefix, e.g. "
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"`no:doctest`.",
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)
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group.addoption(
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"--traceconfig",
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"--trace-config",
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action="store_true",
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default=False,
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help="Trace considerations of conftest.py files",
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)
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group.addoption(
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"--debug",
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action="store",
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nargs="?",
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const="pytestdebug.log",
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dest="debug",
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metavar="DEBUG_FILE_NAME",
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help="Store internal tracing debug information in this log file. "
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"This file is opened with 'w' and truncated as a result, care advised. "
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"Default: pytestdebug.log.",
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)
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group._addoption(
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"-o",
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"--override-ini",
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dest="override_ini",
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action="append",
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help='Override ini option with "option=value" style, '
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"e.g. `-o xfail_strict=True -o cache_dir=cache`.",
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)
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@pytest.hookimpl(hookwrapper=True)
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def pytest_cmdline_parse():
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outcome = yield
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config: Config = outcome.get_result()
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if config.option.debug:
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# --debug | --debug <file.log> was provided.
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path = config.option.debug
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debugfile = open(path, "w", encoding="utf-8")
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debugfile.write(
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"versions pytest-%s, "
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"python-%s\ncwd=%s\nargs=%s\n\n"
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% (
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pytest.__version__,
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".".join(map(str, sys.version_info)),
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os.getcwd(),
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config.invocation_params.args,
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)
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)
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config.trace.root.setwriter(debugfile.write)
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undo_tracing = config.pluginmanager.enable_tracing()
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sys.stderr.write("writing pytest debug information to %s\n" % path)
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def unset_tracing() -> None:
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debugfile.close()
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sys.stderr.write("wrote pytest debug information to %s\n" % debugfile.name)
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config.trace.root.setwriter(None)
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undo_tracing()
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config.add_cleanup(unset_tracing)
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def showversion(config: Config) -> None:
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if config.option.version > 1:
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sys.stdout.write(
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"This is pytest version {}, imported from {}\n".format(
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pytest.__version__, pytest.__file__
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)
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)
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plugininfo = getpluginversioninfo(config)
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if plugininfo:
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for line in plugininfo:
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sys.stdout.write(line + "\n")
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else:
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sys.stdout.write(f"pytest {pytest.__version__}\n")
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def pytest_cmdline_main(config: Config) -> Optional[Union[int, ExitCode]]:
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if config.option.version > 0:
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showversion(config)
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return 0
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elif config.option.help:
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config._do_configure()
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showhelp(config)
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config._ensure_unconfigure()
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return 0
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return None
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def showhelp(config: Config) -> None:
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import textwrap
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reporter = config.pluginmanager.get_plugin("terminalreporter")
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tw = reporter._tw
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tw.write(config._parser.optparser.format_help())
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tw.line()
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tw.line(
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"[pytest] ini-options in the first "
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"pytest.ini|tox.ini|setup.cfg|pyproject.toml file found:"
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)
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tw.line()
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columns = tw.fullwidth # costly call
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indent_len = 24 # based on argparse's max_help_position=24
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indent = " " * indent_len
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for name in config._parser._ininames:
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help, type, default = config._parser._inidict[name]
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if type is None:
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type = "string"
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if help is None:
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raise TypeError(f"help argument cannot be None for {name}")
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spec = f"{name} ({type}):"
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tw.write(" %s" % spec)
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spec_len = len(spec)
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if spec_len > (indent_len - 3):
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# Display help starting at a new line.
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tw.line()
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helplines = textwrap.wrap(
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help,
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columns,
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initial_indent=indent,
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subsequent_indent=indent,
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break_on_hyphens=False,
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)
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for line in helplines:
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tw.line(line)
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else:
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# Display help starting after the spec, following lines indented.
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tw.write(" " * (indent_len - spec_len - 2))
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wrapped = textwrap.wrap(help, columns - indent_len, break_on_hyphens=False)
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if wrapped:
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tw.line(wrapped[0])
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for line in wrapped[1:]:
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tw.line(indent + line)
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tw.line()
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tw.line("Environment variables:")
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vars = [
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("PYTEST_ADDOPTS", "Extra command line options"),
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("PYTEST_PLUGINS", "Comma-separated plugins to load during startup"),
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("PYTEST_DISABLE_PLUGIN_AUTOLOAD", "Set to disable plugin auto-loading"),
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("PYTEST_DEBUG", "Set to enable debug tracing of pytest's internals"),
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]
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for name, help in vars:
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tw.line(f" {name:<24} {help}")
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tw.line()
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tw.line()
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tw.line("to see available markers type: pytest --markers")
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tw.line("to see available fixtures type: pytest --fixtures")
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tw.line(
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"(shown according to specified file_or_dir or current dir "
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"if not specified; fixtures with leading '_' are only shown "
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"with the '-v' option"
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)
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for warningreport in reporter.stats.get("warnings", []):
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tw.line("warning : " + warningreport.message, red=True)
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return
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conftest_options = [("pytest_plugins", "list of plugin names to load")]
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def getpluginversioninfo(config: Config) -> List[str]:
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lines = []
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plugininfo = config.pluginmanager.list_plugin_distinfo()
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if plugininfo:
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lines.append("setuptools registered plugins:")
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for plugin, dist in plugininfo:
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loc = getattr(plugin, "__file__", repr(plugin))
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content = f"{dist.project_name}-{dist.version} at {loc}"
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lines.append(" " + content)
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return lines
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def pytest_report_header(config: Config) -> List[str]:
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lines = []
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if config.option.debug or config.option.traceconfig:
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lines.append(f"using: pytest-{pytest.__version__}")
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verinfo = getpluginversioninfo(config)
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if verinfo:
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lines.extend(verinfo)
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if config.option.traceconfig:
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lines.append("active plugins:")
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items = config.pluginmanager.list_name_plugin()
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for name, plugin in items:
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if hasattr(plugin, "__file__"):
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r = plugin.__file__
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else:
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r = repr(plugin)
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lines.append(f" {name:<20}: {r}")
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return lines
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