#!/usr/bin/env python3
"""Wrapper script to invoke pywikibot-based scripts.
This wrapper script invokes script by its name in this search order:
1. Scripts listed in `user_script_paths` list inside your user config
settings file (usually `user-config.py`) in the given order. Refer
:ref:`External Script Path Settings`.
2. User scripts residing in `scripts/userscripts` (directory mode only).
3. Scripts residing in `scripts` folder (directory mode only).
4. Maintenance scripts residing in `scripts/maintenance` (directory mode only).
5. Framework scripts residing in `pywikibot/scripts`.
This wrapper script is able to invoke scripts even if the script name is
misspelled. In directory mode it also checks package dependencies.
Run scripts with pywikibot in directory mode using::
python pwb.py <pwb options> <name_of_script> <options>
or run scripts with pywikibot installed as a site package using::
pwb <pwb options> <name_of_script> <options>
This wrapper script uses the package directory to store all user files,
will fix up search paths so the package does not need to be installed, etc.
Currently, `<pwb options>` are :ref:`global options`. This can be used
for tests to set the default site (see :phab:`T216825`)::
python pwb.py -lang:de bot_tests -v
.. seealso:: :mod:`pwb` entry point
.. versionchanged:: 7.0
pwb wrapper was added to the Python site package lib.
.. versionchanged:: 7.7
pwb wrapper is able to set ``PYWIKIBOT_TEST_...`` environment variables,
see :ref:`Environment variables`.
.. versionchanged:: 8.0
renamed to wrapper.py.
"""
#
# (C) Pywikibot team, 2012-2024
#
# Distributed under the terms of the MIT license.
#
from __future__ import annotations
import os
import sys
import types
from difflib import get_close_matches
from importlib import import_module
from pathlib import Path
from time import sleep
from warnings import warn
pwb = None
site_package = False
[docs]
def check_pwb_versions(package: str):
"""Validate package version and scripts version.
Rules:
- Pywikibot version must not be older than scrips version
- Scripts version must not be older than previous Pywikibot version
due to deprecation policy
"""
from packaging.version import Version
scripts_version = Version(getattr(package, '__version__', pwb.__version__))
wikibot_version = Version(pwb.__version__)
if scripts_version.release > wikibot_version.release: # pragma: no cover
print('WARNING: Pywikibot version {} is behind scripts package '
'version {}.\nYour Pywikibot may need an update or be '
'misconfigured.\n'.format(wikibot_version, scripts_version))
# calculate previous minor release
if wikibot_version.minor > 0: # pragma: no cover
prev_wikibot = Version('{v.major}.{}.{v.micro}'
.format(wikibot_version.minor - 1,
v=wikibot_version))
if scripts_version.release < prev_wikibot.release:
print('WARNING: Scripts package version {} is behind legacy '
'Pywikibot version {} and current version {}\nYour scripts '
'may need an update or be misconfigured.\n'
.format(scripts_version, prev_wikibot, wikibot_version))
elif scripts_version.release < wikibot_version.release: # pragma: no cover
print('WARNING: Scripts package version {} is behind current version '
'{}\nYour scripts may need an update or be misconfigured.\n'
.format(scripts_version, wikibot_version))
del Version
# The following snippet was developed by Ned Batchelder (and others)
# for coverage [1], with Python 3 support [2] added later,
# and is available under the BSD license (see [3])
# [1]
# https://bitbucket.org/ned/coveragepy/src/b5abcee50dbe/coverage/execfile.py
# [2]
# https://bitbucket.org/ned/coveragepy/src/fd5363090034/coverage/execfile.py
# [3]
# https://bitbucket.org/ned/coveragepy/src/2c5fb3a8b81c/setup.py?at=default#cl-31
[docs]
def run_python_file(filename: str, args: list[str], package=None):
"""Run a python file as if it were the main program on the command line.
.. versionchanged:: 7.7
Set and restore ``PYWIKIBOT_TEST_...`` environment variables.
:param filename: The path to the file to execute, it need not be a
.py file.
:param args: is the argument list to present as sys.argv, as strings.
:param package: The package of the script. Used for checks.
:type package: Optional[module]
"""
# Create a module to serve as __main__
old_main_mod = sys.modules['__main__']
main_mod = types.ModuleType('__main__')
sys.modules['__main__'] = main_mod
main_mod.__file__ = filename
main_mod.__builtins__ = sys.modules['builtins']
if package:
main_mod.__package__ = package.__name__
check_pwb_versions(package)
# Set sys.argv and the first path element properly.
old_argv = sys.argv
old_argvu = pwb.argvu
# set environment values
old_env = os.environ.copy()
for key, value in environ: # pragma: no cover
os.environ[key] = value
sys.argv = [filename] + args
pwb.argvu = [Path(filename).stem] + args
sys.path.insert(0, os.path.dirname(filename))
try:
with open(filename, 'rb') as f:
source = f.read()
exec(compile(source, filename, 'exec', dont_inherit=True),
main_mod.__dict__)
finally:
# Restore the old __main__
sys.modules['__main__'] = old_main_mod
# Restore the old argv and path
sys.argv = old_argv
sys.path.pop(0)
pwb.argvu = old_argvu
# end of snippet from coverage
# Restore environment values
for key, value in environ: # pragma: no cover
if key in old_env:
os.environ[key] = old_env[key]
else:
del os.environ[key]
[docs]
def handle_args(
_,
*args: str,
) -> tuple[str, list[str], list[str], list[str]]:
"""Handle args and get filename.
.. versionchanged:: 7.7
Catch ``PYWIKIBOT_TEST_...`` environment variables.
:return: filename, script args, local pwb args, environment variables
"""
fname = None
local = []
env = []
for index, arg in enumerate(args, start=1):
if arg in ('-version', '--version'):
fname = 'version.py'
elif arg in ('pwb', 'pwb.py', 'wrapper', 'wrapper.py'):
pass
elif arg.startswith('-'):
local.append(arg)
elif arg.startswith('PYWIKIBOT_TEST_'):
var, _, val = arg.partition('=')
env.append((var, val or '1'))
else:
fname = arg
if not fname.endswith('.py'):
fname += '.py'
if fname:
break
else:
index = 0
return fname, list(args[index:]), local, env
def _print_requirements(requirements, script, variant): # pragma: no cover
"""Print pip command to install requirements."""
if not requirements:
return
if len(requirements) > 1:
format_string = '\nPackages necessary for {} are {}.'
else:
format_string = '\nA package necessary for {} is {}.'
print(format_string.format(script or 'pywikibot', variant))
print('Please update required module{} with:\n\n'
.format('s' if len(requirements) > 1 else ''))
for requirement in requirements:
print(f" pip install \"{str(requirement).partition(';')[0]}\"\n")
[docs]
def check_modules(script: str | None = None) -> bool:
"""Check whether mandatory modules are present.
This also checks Python version when importing dependencies from setup.py
:param script: The script name to be checked for dependencies
:return: True if all dependencies are installed
:raise RuntimeError: wrong Python version found in setup.py
"""
from packaging.requirements import Requirement
from pywikibot.backports import importlib_metadata
from setup import script_deps
missing_requirements = []
version_conflicts = []
if script:
dependencies = script_deps.get(Path(script).name, [])
else:
from setup import dependencies
for dependency in dependencies:
if dependency.startswith(('importlib_metadata', 'packaging')):
# Ignore these dependencies because ImportError is raised in an
# early state when they are imported in backports. They are already
# used at this point. This is a workaound for toolforge where some
# modules are not installed as a site-package.
# TODO: Check imports from external source
continue
requirement = Requirement(dependency)
if requirement.marker is None or requirement.marker.evaluate():
try:
instlld_vrsn = importlib_metadata.version(requirement.name)
except importlib_metadata.PackageNotFoundError as e:
missing_requirements.append(requirement)
print(e)
else:
if instlld_vrsn not in requirement.specifier:
version_conflicts.append(requirement)
print(
f'{requirement.name} version {instlld_vrsn} is '
f'installed but {requirement.specifier} is required'
)
del Requirement
del importlib_metadata
del script_deps
_print_requirements(missing_requirements, script, 'missing')
_print_requirements(version_conflicts, script, 'outdated')
if version_conflicts and not missing_requirements: # pragma: no cover
print('\nYou may continue on your own risk; type CTRL-C to stop.')
try:
sleep(5)
except KeyboardInterrupt:
return False
return not missing_requirements
filename, script_args, global_args, environ = handle_args(*sys.argv)
# Search for user config file (user-config.py) before creating one.
# If successful, user config file already exists in one of the candidate
# directories. See config.py for details on search order.
# Use env var to communicate to config.py pwb.py location (bug T74918).
wrapper_dir = Path(__file__).parent
os.environ['PYWIKIBOT_DIR_PWB'] = str(wrapper_dir)
try:
import pywikibot as pwb
except RuntimeError as e: # pragma: no cover
os.environ['PYWIKIBOT_NO_USER_CONFIG'] = '2'
import pywikibot as pwb
# user config file to be created
if filename is not None and not (filename.startswith('generate_')
or filename == 'version.py'):
from pywikibot.config import user_config_file
if user_config_file != 'user-config.py':
# do not create a user config file if name is not default
sys.exit(e)
print('NOTE: user-config.py was not found!')
print('Please follow the prompts to create it:')
run_python_file(
str(wrapper_dir.joinpath('generate_user_files.py')), [])
# because we have loaded pywikibot without user-config.py loaded,
# we need to re-start the entire process. Ask the user to do so.
print('Now, you have to re-execute the command to start your script.')
sys.exit(1)
except ImportError as e: # raised in textlib or backports
sys.exit(e)
[docs]
def find_alternates(filename, script_paths):
"""Search for similar filenames in the given script paths."""
from pywikibot import config, error, info, input_choice, warning
from pywikibot.bot import QuitKeyboardInterrupt, ShowingListOption
assert config.pwb_close_matches > 0, \
'config.pwb_close_matches must be greater than 0'
assert 0.0 < config.pwb_cut_off < 1.0, \
'config.pwb_cut_off must be a float in range [0, 1]'
error(f'{filename} not found! Misspelling?')
scripts = {}
for folder in script_paths:
if not folder.exists(): # pragma: no cover
warning(
f'{folder} does not exists; remove it from user_script_paths')
continue
for script_name in folder.iterdir():
name, suffix = script_name.stem, script_name.suffix
if suffix == '.py' and not name.startswith('__'):
scripts[name] = script_name
# remove .py for better matching
filename = filename[:-3]
similar_scripts = get_close_matches(filename, scripts,
config.pwb_close_matches,
config.pwb_cut_off)
if not similar_scripts:
return None
if len(similar_scripts) == 1:
script = similar_scripts[0]
wait_time = config.pwb_autostart_waittime
info('NOTE: Starting the most similar script '
'<<lightyellow>>{}.py<<default>>\n'
' in {} seconds; type CTRL-C to stop.'
.format(script, wait_time))
try:
sleep(wait_time) # Wait a bit to let it be cancelled
except KeyboardInterrupt:
return None
else:
msg = '\nThe most similar scripts are:'
alternatives = ShowingListOption(similar_scripts, pre=msg, post='')
try:
_, script = input_choice('Which script to be run:',
alternatives, default='1')
except QuitKeyboardInterrupt:
return None
print() # pragma: no cover
return str(scripts[script])
[docs]
def find_filename(filename):
"""Search for the filename in the given script paths.
.. versionchanged:: 7.0
Search users_scripts_paths in config.base_dir
.. versionchanged:: 9.0
Add config.base_dir to search path
"""
from pywikibot import config
path_list = [] # paths to find misspellings
def test_paths(paths, root: Path):
"""Search for filename in given paths within 'root' base directory."""
for file_package in paths:
package = file_package.split('.')
path = package + [filename]
testpath = root.joinpath(*path)
if testpath.exists():
return str(testpath)
path_list.append(testpath.parent)
return None
user_script_paths = ['']
if config.user_script_paths: # pragma: no cover
if isinstance(config.user_script_paths, list):
user_script_paths += config.user_script_paths
else:
warn("'user_script_paths' must be a list,\n"
f'found: {type(config.user_script_paths).__name__}.'
' Ignoring this setting.')
found = test_paths(user_script_paths, Path(config.base_dir))
if found: # pragma: no cover
return found
if not site_package:
script_paths = [
'scripts.userscripts',
'scripts',
'scripts.maintenance',
]
found = test_paths(script_paths, wrapper_dir.parents[1])
if found:
return found
# search for system scripts in pywikibot.scripts directory
found = test_paths([''], wrapper_dir)
if found:
return found
return find_alternates(filename, path_list)
[docs]
def execute():
"""Parse arguments, extract filename and run the script.
.. versionadded:: 7.0
renamed from :func:`main`
"""
global filename
# If -nolog options are in global args, add them to
# script args.
if '-nolog' in global_args:
script_args.append('-nolog')
if global_args: # don't use sys.argv
unknown_args = pwb.handle_args(global_args)
if unknown_args: # pragma: no cover
print('ERROR: unknown pwb.py argument{}: {}\n'
.format('' if len(unknown_args) == 1 else 's',
', '.join(unknown_args)))
return False
if not filename:
return False
file_package = None
if not os.path.exists(filename):
filename = find_filename(filename)
if filename is None:
return True
# When both pwb.py and the filename to run are within the current
# working directory:
# a) set __package__ as if called using python -m scripts.blah.foo
# b) set __file__ to be relative, so it can be relative in backtraces,
# and __file__ *appears* to be an unstable path to load data from.
# This is a rough (and quick!) emulation of 'package name' detection.
# a much more detailed implementation is in coverage's find_module.
# https://bitbucket.org/ned/coveragepy/src/default/coverage/execfile.py
cwd = Path.cwd()
syspath = Path(sys.argv[0])
absolute_path = syspath.parent
file_path = Path(filename)
if absolute_path == cwd and cwd in file_path.parents:
relative_filename = file_path.relative_to(absolute_path)
# remove the filename, and use '.' instead of path separator.
file_package = str(relative_filename.parent).replace(os.sep, '.')
filename = os.path.join(os.curdir, str(relative_filename))
module = None
if file_package:
try:
module = sys.modules[file_package]
except KeyError:
try:
module = import_module(file_package)
except ImportError as e:
warn(f'Parent module {file_package} not found: {e}',
ImportWarning)
help_option = any(arg.startswith('-help:') or arg == '-help'
for arg in script_args)
if site_package or check_modules(filename) or help_option:
run_python_file(filename, script_args, module)
return True
[docs]
def main():
"""Script entry point. Print doc if necessary.
.. versionchanged:: 7.0
previous implementation was renamed to :func:`execute`
"""
if not check_modules(): # pragma: no cover
sys.exit()
if not execute():
print(__doc__)
[docs]
def run(): # pragma: no cover
"""Site package entry point. Print doc if necessary.
.. versionadded:: 7.0
"""
global site_package
site_package = True
if not execute():
print(__doc__)
if __name__ == '__main__':
main()