#!/usr/bin/env python # # SPDX-FileCopyrightText: 2019-2023 Espressif Systems (Shanghai) CO LTD # # SPDX-License-Identifier: Apache-2.0 # # 'idf.py' is a top-level config/build command line tool for ESP-IDF # # You don't have to use idf.py, you can use cmake directly # (or use cmake in an IDE) # WARNING: we don't check for Python build-time dependencies until # check_environment() function below. If possible, avoid importing # any external libraries here - put in external script, or import in # their specific function instead. import codecs import json import locale import os import os.path import shlex import subprocess import sys from collections import Counter, OrderedDict, _OrderedDictKeysView from importlib import import_module from pkgutil import iter_modules from typing import Any, Callable, Dict, List, Optional, Union # pyc files remain in the filesystem when switching between branches which might raise errors for incompatible # idf.py extensions. Therefore, pyc file generation is turned off: sys.dont_write_bytecode = True import python_version_checker # noqa: E402 try: from idf_py_actions.errors import FatalError # noqa: E402 from idf_py_actions.tools import (PROG, SHELL_COMPLETE_RUN, SHELL_COMPLETE_VAR, PropertyDict, # noqa: E402 debug_print_idf_version, get_target, merge_action_lists, print_warning) if os.getenv('IDF_COMPONENT_MANAGER') != '0': from idf_component_manager import idf_extensions except ImportError as e: # For example, importing click could cause this. print((f'Cannot import module "{e.name}". This usually means that "idf.py" was not ' f'spawned within an ESP-IDF shell environment or the python virtual ' f'environment used by "idf.py" is corrupted.\n' f'Please use idf.py only in an ESP-IDF shell environment. If problem persists, ' f'please try to install ESP-IDF tools again as described in the Get Started guide.'), file=sys.stderr) sys.exit(1) # Use this Python interpreter for any subprocesses we launch PYTHON = sys.executable # note: os.environ changes don't automatically propagate to child processes, # you have to pass env=os.environ explicitly anywhere that we create a process os.environ['PYTHON'] = sys.executable def check_environment() -> List: """ Verify the environment contains the top-level tools we need to operate (cmake will check a lot of other things) """ checks_output = [] # verify that IDF_PATH env variable is set # find the directory idf.py is in, then the parent directory of this, and assume this is IDF_PATH detected_idf_path = os.path.realpath(os.path.join(os.path.dirname(__file__), '..')) if 'IDF_PATH' in os.environ: set_idf_path = os.path.realpath(os.environ['IDF_PATH']) if set_idf_path != detected_idf_path: print_warning( 'WARNING: IDF_PATH environment variable is set to %s but %s path indicates IDF directory %s. ' 'Using the environment variable directory, but results may be unexpected...' % (set_idf_path, PROG, detected_idf_path)) else: print_warning('Setting IDF_PATH environment variable: %s' % detected_idf_path) os.environ['IDF_PATH'] = detected_idf_path try: # The Python compatibility check could have been done earlier (tools/detect_python.{sh,fish}) but PATH is # not set for import at that time. Even if the check would be done before, the same check needs to be done # here as well (for example one can call idf.py from a not properly set-up environment). python_version_checker.check() except RuntimeError as e: raise FatalError(e) # check Python dependencies checks_output.append('Checking Python dependencies...') try: out = subprocess.check_output( [ os.environ['PYTHON'], os.path.join(os.environ['IDF_PATH'], 'tools', 'idf_tools.py'), 'check-python-dependencies', ], env=os.environ, ) checks_output.append(out.decode('utf-8', 'ignore').strip()) except subprocess.CalledProcessError as e: print_warning(e.output.decode('utf-8', 'ignore'), stream=sys.stderr) debug_print_idf_version() raise SystemExit(1) # Check used Python interpreter checks_output.append('Checking used Python interpreter...') try: python_venv_path = os.environ['IDF_PYTHON_ENV_PATH'] if python_venv_path and not sys.executable.startswith(python_venv_path): print_warning(f'WARNING: Python interpreter "{sys.executable}" used to start idf.py is not from installed venv "{python_venv_path}"') except KeyError: print_warning('WARNING: The IDF_PYTHON_ENV_PATH is missing in environmental variables!') return checks_output def _safe_relpath(path: str, start: Optional[str]=None) -> str: """ Return a relative path, same as os.path.relpath, but only if this is possible. It is not possible on Windows, if the start directory and the path are on different drives. """ try: return os.path.relpath(path, os.curdir if start is None else start) except ValueError: return os.path.abspath(path) def init_cli(verbose_output: List=None) -> Any: # Click is imported here to run it after check_environment() import click class Deprecation(object): """Construct deprecation notice for help messages""" def __init__(self, deprecated: Union[Dict, str, bool]=False) -> None: self.deprecated = deprecated self.since = None self.removed = None self.exit_with_error = None self.custom_message = '' if isinstance(deprecated, dict): self.custom_message = deprecated.get('message', '') self.since = deprecated.get('since', None) self.removed = deprecated.get('removed', None) self.exit_with_error = deprecated.get('exit_with_error', None) elif isinstance(deprecated, str): self.custom_message = deprecated def full_message(self, type: str='Option') -> str: if self.exit_with_error: return '%s is deprecated %sand was removed%s.%s' % ( type, 'since %s ' % self.since if self.since else '', ' in %s' % self.removed if self.removed else '', ' %s' % self.custom_message if self.custom_message else '', ) else: return '%s is deprecated %sand will be removed in%s.%s' % ( type, 'since %s ' % self.since if self.since else '', ' %s' % self.removed if self.removed else ' future versions', ' %s' % self.custom_message if self.custom_message else '', ) def help(self, text: str, type: str='Option', separator: str=' ') -> str: text = text or '' return self.full_message(type) + separator + text if self.deprecated else text def short_help(self, text: str) -> str: text = text or '' return ('Deprecated! ' + text) if self.deprecated else text def check_deprecation(ctx: click.core.Context) -> None: """Prints deprecation warnings for arguments in given context""" for option in ctx.command.params: default = () if option.multiple else option.default if isinstance(option, Option) and option.deprecated and ctx.params[option.name] != default: deprecation = Deprecation(option.deprecated) if deprecation.exit_with_error: raise FatalError('Error: %s' % deprecation.full_message('Option "%s"' % option.name)) else: print_warning('Warning: %s' % deprecation.full_message('Option "%s"' % option.name)) class Task(object): def __init__(self, callback: Callable, name: str, aliases: List, dependencies: Optional[List], order_dependencies: Optional[List], action_args: Dict) -> None: self.callback = callback self.name = name self.dependencies = dependencies self.order_dependencies = order_dependencies self.action_args = action_args self.aliases = aliases def __call__(self, context: click.core.Context, global_args: PropertyDict, action_args: Dict=None) -> None: if action_args is None: action_args = self.action_args self.callback(self.name, context, global_args, **action_args) class Action(click.Command): def __init__( self, name: Optional[str]=None, aliases: Optional[List]=None, deprecated: Union[Dict, str, bool]=False, dependencies: Optional[List]=None, order_dependencies: Optional[List]=None, hidden: bool=False, **kwargs: Any) -> None: super(Action, self).__init__(name, **kwargs) self.name: str = self.name or self.callback.__name__ self.deprecated: Union[Dict, str, bool] = deprecated self.hidden: bool = hidden if aliases is None: aliases = [] self.aliases = aliases self.help: str = self.help or self.callback.__doc__ or '' if dependencies is None: dependencies = [] if order_dependencies is None: order_dependencies = [] # Show first line of help if short help is missing self.short_help: str = self.short_help or self.help.split('\n')[0] if deprecated: deprecation = Deprecation(deprecated) self.short_help = deprecation.short_help(self.short_help) self.help = deprecation.help(self.help, type='Command', separator='\n') # Add aliases to help string if aliases: aliases_help = 'Aliases: %s.' % ', '.join(aliases) self.help = '\n'.join([self.help, aliases_help]) self.short_help = ' '.join([aliases_help, self.short_help]) self.unwrapped_callback = self.callback if self.callback is not None: def wrapped_callback(**action_args: Any) -> Task: return Task( callback=self.unwrapped_callback, name=self.name, dependencies=dependencies, order_dependencies=order_dependencies, action_args=action_args, aliases=self.aliases, ) self.callback = wrapped_callback def invoke(self, ctx: click.core.Context) -> click.core.Context: if self.deprecated: deprecation = Deprecation(self.deprecated) message = deprecation.full_message('Command "%s"' % self.name) if deprecation.exit_with_error: raise FatalError('Error: %s' % message) else: print_warning('Warning: %s' % message) self.deprecated = False # disable Click's built-in deprecation handling # Print warnings for options check_deprecation(ctx) return super(Action, self).invoke(ctx) class Argument(click.Argument): """ Positional argument names - alias of 'param_decls' """ def __init__(self, **kwargs: str): names = kwargs.pop('names') super(Argument, self).__init__(names, **kwargs) class Scope(object): """ Scope for sub-command option. possible values: - default - only available on defined level (global/action) - global - When defined for action, also available as global - shared - Opposite to 'global': when defined in global scope, also available for all actions """ SCOPES = ('default', 'global', 'shared') def __init__(self, scope: Union['Scope', str]=None) -> None: # noqa: F821 if scope is None: self._scope = 'default' elif isinstance(scope, str) and scope in self.SCOPES: self._scope = scope elif isinstance(scope, Scope): self._scope = str(scope) else: raise FatalError('Unknown scope for option: %s' % scope) @property def is_global(self) -> bool: return self._scope == 'global' @property def is_shared(self) -> bool: return self._scope == 'shared' def __str__(self) -> str: return self._scope class Option(click.Option): """Option that knows whether it should be global""" def __init__(self, scope: Union[Scope, str]=None, deprecated: Union[Dict, str, bool]=False, hidden: bool=False, **kwargs: str) -> None: """ Keyword arguments additional to Click's Option class: names - alias of 'param_decls' deprecated - marks option as deprecated. May be boolean, string (with custom deprecation message) or dict with optional keys: since: version of deprecation removed: version when option will be removed custom_message: Additional text to deprecation warning """ kwargs['param_decls'] = kwargs.pop('names') super(Option, self).__init__(**kwargs) self.deprecated = deprecated self.scope = Scope(scope) self.hidden = hidden if deprecated: deprecation = Deprecation(deprecated) self.help: str = deprecation.help(self.help) if self.envvar: self.help += ' The default value can be set with the %s environment variable.' % self.envvar if self.scope.is_global: self.help += ' This option can be used at most once either globally, or for one subcommand.' def get_help_record(self, ctx: click.core.Context) -> Any: # Backport "hidden" parameter to click 5.0 if self.hidden: return None return super(Option, self).get_help_record(ctx) class CLI(click.MultiCommand): """Action list contains all actions with options available for CLI""" def __init__(self, all_actions: Dict=None, verbose_output: List=None, help: str=None) -> None: super(CLI, self).__init__( chain=True, invoke_without_command=True, result_callback=self.execute_tasks, no_args_is_help=True, context_settings={'max_content_width': 140}, help=help, ) self._actions = {} self.global_action_callbacks = [] self.commands_with_aliases = {} if verbose_output is None: verbose_output = [] self.verbose_output = verbose_output if all_actions is None: all_actions = {} shared_options = [] # Global options for option_args in all_actions.get('global_options', []): option = Option(**option_args) self.params.append(option) if option.scope.is_shared: shared_options.append(option) # Global options validators self.global_action_callbacks = all_actions.get('global_action_callbacks', []) # Actions for name, action in all_actions.get('actions', {}).items(): arguments = action.pop('arguments', []) options = action.pop('options', []) if arguments is None: arguments = [] if options is None: options = [] self._actions[name] = Action(name=name, **action) for alias in [name] + action.get('aliases', []): self.commands_with_aliases[alias] = name for argument_args in arguments: self._actions[name].params.append(Argument(**argument_args)) # Add all shared options for option in shared_options: self._actions[name].params.append(option) for option_args in options: option = Option(**option_args) if option.scope.is_shared: raise FatalError( '"%s" is defined for action "%s". ' ' "shared" options can be declared only on global level' % (option.name, name)) # Promote options to global if see for the first time if option.scope.is_global and option.name not in [o.name for o in self.params]: self.params.append(option) self._actions[name].params.append(option) def list_commands(self, ctx: click.core.Context) -> List: return sorted(filter(lambda name: not self._actions[name].hidden, self._actions)) def get_command(self, ctx: click.core.Context, name: str) -> Optional[Action]: if name in self.commands_with_aliases: return self._actions.get(self.commands_with_aliases.get(name)) # Trying fallback to build target (from "all" action) if command is not known else: callback = self._actions.get('fallback') if callback: return Action(name=name, callback=callback.unwrapped_callback) return None def _print_closing_message(self, args: PropertyDict, actions: _OrderedDictKeysView) -> None: # print a closing message of some kind, # except if any of the following actions were requested if any(t in str(actions) for t in ('flash', 'dfu', 'uf2', 'uf2-app', 'qemu')): print('Done') return if not os.path.exists(os.path.join(args.build_dir, 'flasher_args.json')): print('Done') return # Otherwise, if we built any binaries print a message about # how to flash them def print_flashing_message(title: str, key: str) -> None: with open(os.path.join(args.build_dir, 'flasher_args.json')) as file: flasher_args: Dict[str, Any] = json.load(file) def flasher_path(f: Union[str, 'os.PathLike[str]']) -> str: if type(args.build_dir) is bytes: args.build_dir = args.build_dir.decode() return _safe_relpath(os.path.join(args.build_dir, f)) if key != 'project': # flashing a single item if key not in flasher_args: # This is the case for 'idf.py bootloader' if Secure Boot is on, need to follow manual flashing steps print('\n%s build complete.' % title) return cmd = '' if (key == 'bootloader'): # bootloader needs --flash-mode, etc to be passed in cmd = ' '.join(flasher_args['write_flash_args']) + ' ' cmd += flasher_args[key]['offset'] + ' ' cmd += flasher_path(flasher_args[key]['file']) else: # flashing the whole project cmd = ' '.join(flasher_args['write_flash_args']) + ' ' flash_items = sorted( ((o, f) for (o, f) in flasher_args['flash_files'].items() if len(o) > 0), key=lambda x: int(x[0], 0), ) for o, f in flash_items: cmd += o + ' ' + flasher_path(f) + ' ' flash_target = 'flash' if key == 'project' else f'{key}-flash' print(f'{os.linesep}{title} build complete. To flash, run:') print(f' idf.py {flash_target}') if args.port: print('or') print(f' idf.py -p {args.port} {flash_target}') print('or') print(f' idf.py -p PORT {flash_target}') esptool_cmd = ['python -m esptool', '--chip {}'.format(flasher_args['extra_esptool_args']['chip']), f'-b {args.baud}', '--before {}'.format(flasher_args['extra_esptool_args']['before']), '--after {}'.format(flasher_args['extra_esptool_args']['after'])] if not flasher_args['extra_esptool_args']['stub']: esptool_cmd += ['--no-stub'] if args.port: esptool_cmd += [f'-p {args.port}'] esptool_cmd += ['write_flash'] print('or') print(' {}'.format(' '.join(esptool_cmd + [cmd.strip()]))) if os.path.exists(os.path.join(args.build_dir, 'flash_args')): print(f'or from the "{args.build_dir}" directory') print(' {}'.format(' '.join(esptool_cmd + ['"@flash_args"']))) if 'all' in actions or 'build' in actions: print_flashing_message('Project', 'project') else: if 'app' in actions: print_flashing_message('App', 'app') if 'partition-table' in actions: print_flashing_message('Partition Table', 'partition-table') if 'bootloader' in actions: print_flashing_message('Bootloader', 'bootloader') def execute_tasks(self, tasks: List, **kwargs: str) -> OrderedDict: ctx = click.get_current_context() global_args = PropertyDict(kwargs) # Show warning if some tasks are present several times in the list dupplicated_tasks = sorted( [item for item, count in Counter(task.name for task in tasks).items() if count > 1]) if dupplicated_tasks: dupes = ', '.join('"%s"' % t for t in dupplicated_tasks) print_warning( 'WARNING: Command%s found in the list of commands more than once. ' % ('s %s are' % dupes if len(dupplicated_tasks) > 1 else ' %s is' % dupes) + 'Only first occurrence will be executed.') for task in tasks: # Set propagated global options. # These options may be set on one subcommand, but available in the list of global arguments for key in list(task.action_args): option = next((o for o in ctx.command.params if o.name == key), None) if option and (option.scope.is_global or option.scope.is_shared): local_value = task.action_args.pop(key) global_value = global_args[key] default = () if option.multiple else option.default if global_value != default and local_value != default and global_value != local_value: if hasattr(option, 'envvar') and option.envvar and os.getenv(option.envvar) != default: msg = (f'This option cannot be set in command line if the {option.envvar} ' 'environment variable is set to a different value.') else: msg = 'This option can appear at most once in the command line.' raise FatalError(f'Option "{key}" provided for "{task.name}" is already defined to ' f'a different value. {msg}') if local_value != default: global_args[key] = local_value # Show warnings about global arguments check_deprecation(ctx) # Make sure that define_cache_entry is mutable list and can be modified in callbacks global_args.define_cache_entry = list(global_args.define_cache_entry) # Execute all global action callback - first from idf.py itself, then from extensions for action_callback in ctx.command.global_action_callbacks: action_callback(ctx, global_args, tasks) # Build full list of tasks to and deal with dependencies and order dependencies tasks_to_run: OrderedDict = OrderedDict() while tasks: task = tasks[0] tasks_dict = dict([(t.name, t) for t in tasks]) dependecies_processed = True # If task have some dependecies they have to be executed before the task. for dep in task.dependencies: if dep not in tasks_to_run.keys(): # If dependent task is in the list of unprocessed tasks move to the front of the list if dep in tasks_dict.keys(): dep_task = tasks.pop(tasks.index(tasks_dict[dep])) # Otherwise invoke it with default set of options # and put to the front of the list of unprocessed tasks else: print( 'Adding "%s"\'s dependency "%s" to list of commands with default set of options.' % (task.name, dep)) dep_task = ctx.invoke(ctx.command.get_command(ctx, dep)) # Remove options with global scope from invoke tasks because they are already in global_args for key in list(dep_task.action_args): option = next((o for o in ctx.command.params if o.name == key), None) if option and (option.scope.is_global or option.scope.is_shared): dep_task.action_args.pop(key) tasks.insert(0, dep_task) dependecies_processed = False # Order only dependencies are moved to the front of the queue if they present in command list for dep in task.order_dependencies: if dep in tasks_dict.keys() and dep not in tasks_to_run.keys(): tasks.insert(0, tasks.pop(tasks.index(tasks_dict[dep]))) dependecies_processed = False if dependecies_processed: # Remove task from list of unprocessed tasks tasks.pop(0) # And add to the queue if task.name not in tasks_to_run.keys(): tasks_to_run.update([(task.name, task)]) # Run all tasks in the queue # when global_args.dry_run is true idf.py works in idle mode and skips actual task execution if not global_args.dry_run: for task in tasks_to_run.values(): name_with_aliases = task.name if task.aliases: name_with_aliases += ' (aliases: %s)' % ', '.join(task.aliases) # When machine-readable json format for help is printed, don't show info about executing action so the output is deserializable if name_with_aliases != 'help' or not task.action_args.get('json_option', False): print('Executing action: %s' % name_with_aliases) task(ctx, global_args, task.action_args) self._print_closing_message(global_args, tasks_to_run.keys()) return tasks_to_run # That's a tiny parser that parse project-dir even before constructing # fully featured click parser to be sure that extensions are loaded from the right place @click.command( add_help_option=False, context_settings={ 'allow_extra_args': True, 'ignore_unknown_options': True }, ) @click.option('-C', '--project-dir', default=os.getcwd(), type=click.Path()) def parse_project_dir(project_dir: str) -> Any: return os.path.realpath(project_dir) # Set `complete_var` to not existing environment variable name to prevent early cmd completion project_dir = parse_project_dir(standalone_mode=False, complete_var='_IDF.PY_COMPLETE_NOT_EXISTING') all_actions: Dict = {} # Load extensions from components dir idf_py_extensions_path = os.path.join(os.environ['IDF_PATH'], 'tools', 'idf_py_actions') extension_dirs = [os.path.realpath(idf_py_extensions_path)] extra_paths = os.environ.get('IDF_EXTRA_ACTIONS_PATH') if extra_paths is not None: for path in extra_paths.split(';'): path = os.path.realpath(path) if path not in extension_dirs: extension_dirs.append(path) extensions = [] for directory in extension_dirs: if directory and not os.path.exists(directory): print_warning('WARNING: Directory with idf.py extensions doesn\'t exist:\n %s' % directory) continue sys.path.append(directory) for _finder, name, _ispkg in sorted(iter_modules([directory])): if name.endswith('_ext'): extensions.append((name, import_module(name))) # Load component manager idf.py extensions if not explicitly disabled if os.getenv('IDF_COMPONENT_MANAGER') != '0': extensions.append(('component_manager_ext', idf_extensions)) # Optional load `pyclang` for additional clang-tidy related functionalities try: from pyclang import idf_extension extensions.append(('idf_clang_tidy_ext', idf_extension)) except ImportError: pass for name, extension in extensions: try: all_actions = merge_action_lists(all_actions, extension.action_extensions(all_actions, project_dir)) except AttributeError: print_warning('WARNING: Cannot load idf.py extension "%s"' % name) # Load extensions from project dir if os.path.exists(os.path.join(project_dir, 'idf_ext.py')): sys.path.append(project_dir) try: from idf_ext import action_extensions except ImportError: print_warning('Error importing extension file idf_ext.py. Skipping.') print_warning( "Please make sure that it contains implementation (even if it's empty) of add_action_extensions") try: all_actions = merge_action_lists(all_actions, action_extensions(all_actions, project_dir)) except NameError: pass cli_help = ( 'ESP-IDF CLI build management tool. ' 'For commands that are not known to idf.py an attempt to execute it as a build system target will be made. ' 'Selected target: {}'.format(get_target(project_dir))) return CLI(help=cli_help, verbose_output=verbose_output, all_actions=all_actions) def main(argv: List[Any] = None) -> None: # Check the environment only when idf.py is invoked regularly from command line. checks_output = None if SHELL_COMPLETE_RUN else check_environment() # Check existance of the current working directory to prevent exceptions from click cli. try: os.getcwd() except FileNotFoundError as e: raise FatalError(f'ERROR: {e}. Working directory cannot be established. Check its existence.') try: cli = init_cli(verbose_output=checks_output) except ImportError: if SHELL_COMPLETE_RUN: pass else: raise else: argv = expand_file_arguments(argv or sys.argv[1:]) cli(argv, prog_name=PROG, complete_var=SHELL_COMPLETE_VAR) def expand_file_arguments(argv: List[Any]) -> List[Any]: """ Any argument starting with "@" gets replaced with all values read from a text file. Text file arguments can be split by newline or by space. Values are added "as-is", as if they were specified in this order on the command line. """ visited = set() expanded = False def expand_args(args: List[Any], parent_path: str, file_stack: List[str]) -> List[str]: expanded_args = [] for arg in args: if not arg.startswith('@'): expanded_args.append(arg) else: nonlocal expanded, visited expanded = True file_name = arg[1:] rel_path = os.path.normpath(os.path.join(parent_path, file_name)) if rel_path in visited: file_stack_str = ' -> '.join(['@' + f for f in file_stack + [file_name]]) raise FatalError(f'Circular dependency in file argument expansion: {file_stack_str}') visited.add(rel_path) try: with open(rel_path, 'r') as f: for line in f: expanded_args.extend(expand_args(shlex.split(line), os.path.dirname(rel_path), file_stack + [file_name])) except IOError: file_stack_str = ' -> '.join(['@' + f for f in file_stack + [file_name]]) raise FatalError(f"File '{rel_path}' (expansion of {file_stack_str}) could not be opened. " 'Please ensure the file exists and you have the necessary permissions to read it.') return expanded_args argv = expand_args(argv, os.getcwd(), []) if expanded: print(f'Running: idf.py {" ".join(argv)}') return argv def _valid_unicode_config() -> Union[codecs.CodecInfo, bool]: # Python 2 is always good if sys.version_info[0] == 2: return True # With python 3 unicode environment is required try: return codecs.lookup(locale.getpreferredencoding()).name != 'ascii' except Exception: return False def _find_usable_locale() -> str: try: locales = subprocess.Popen(['locale', '-a'], stdout=subprocess.PIPE, stderr=subprocess.PIPE).communicate()[0].decode('ascii', 'replace') except OSError: locales = '' usable_locales: List[str] = [] for line in locales.splitlines(): locale = line.strip() locale_name = locale.lower().replace('-', '') # C.UTF-8 is the best option, if supported if locale_name == 'c.utf8': return locale if locale_name.endswith('.utf8'): # Make a preference of english locales if locale.startswith('en_'): usable_locales.insert(0, locale) else: usable_locales.append(locale) if not usable_locales: raise FatalError( 'Support for Unicode filenames is required, but no suitable UTF-8 locale was found on your system.' ' Please refer to the manual for your operating system for details on locale reconfiguration.') return usable_locales[0] if __name__ == '__main__': try: if 'MSYSTEM' in os.environ: print_warning( 'MSys/Mingw is no longer supported. Please follow the getting started guide of the ' 'documentation in order to set up a suitiable environment, or continue at your own risk.') elif os.name == 'posix' and not _valid_unicode_config(): # Trying to find best utf-8 locale available on the system and restart python with it best_locale = _find_usable_locale() print_warning( 'Your environment is not configured to handle unicode filenames outside of ASCII range.' ' Environment variable LC_ALL is temporary set to %s for unicode support.' % best_locale) os.environ['LC_ALL'] = best_locale ret = subprocess.call([sys.executable] + sys.argv, env=os.environ) if ret: raise SystemExit(ret) else: main() except FatalError as e: print(e, file=sys.stderr) sys.exit(2)