diff options
| -rw-r--r-- | cmd2/cmd2.py | 83 | ||||
| -rw-r--r-- | cmd2/parsing.py | 12 | ||||
| -rw-r--r-- | tests/test_argparse.py | 12 |
3 files changed, 58 insertions, 49 deletions
diff --git a/cmd2/cmd2.py b/cmd2/cmd2.py index 66de8473..070849b7 100644 --- a/cmd2/cmd2.py +++ b/cmd2/cmd2.py @@ -150,24 +150,6 @@ def categorize(func: Union[Callable, Iterable], category: str) -> None: setattr(func, HELP_CATEGORY, category) -def parse_quoted_string(string: str, preserve_quotes: bool) -> List[str]: - """ - Parse a quoted string into a list of arguments - :param string: the string being parsed - :param preserve_quotes: if True, then quotes will not be stripped - """ - if isinstance(string, list): - # arguments are already a list, return the list we were passed - lexed_arglist = string - else: - # Use shlex to split the command line into a list of arguments based on shell rules - lexed_arglist = shlex.split(string, comments=False, posix=False) - - if not preserve_quotes: - lexed_arglist = [utils.strip_quotes(arg) for arg in lexed_arglist] - return lexed_arglist - - def with_category(category: str) -> Callable: """A decorator to apply a category to a command function.""" def cat_decorator(func): @@ -176,10 +158,37 @@ def with_category(category: str) -> Callable: return cat_decorator +def _get_command_arg_list(to_parse: Union[str, Statement], preserve_quotes: bool) -> List[str]: + """ + Called by the argument_list and argparse wrappers to retrieve just the arguments being + passed to their do_* methods as a list. + + :param to_parse: what is being passed to the do_* method. It can be one of two types: + 1. An already parsed Statement + 2. An argument string in cases where a do_* method is explicitly called + e.g.: Calling do_help('alias create') would cause to_parse to be 'alias create' + + :param preserve_quotes: if True, then quotes will not be stripped from the arguments + :return: the arguments in a list + """ + if isinstance(to_parse, Statement): + # In the case of a Statement, we already have what we need + if preserve_quotes: + return to_parse.arg_list + else: + return to_parse.argv[1:] + else: + # We only have the argument string. Use the parser to split this string. + parsed_arglist = StatementParser.shlex_split(to_parse) + if not preserve_quotes: + parsed_arglist = [utils.strip_quotes(arg) for arg in parsed_arglist] + + return parsed_arglist + + def with_argument_list(*args: List[Callable], preserve_quotes: bool = False) -> Callable[[List], Optional[bool]]: """A decorator to alter the arguments passed to a do_* cmd2 method. Default passes a string of whatever the user - typed. With this decorator, the decorated method will receive a list of arguments parsed from user input using - shlex.split(). + typed. With this decorator, the decorated method will receive a list of arguments parsed from user input. :param args: Single-element positional argument list containing do_* method this decorator is wrapping :param preserve_quotes: if True, then argument quotes will not be stripped @@ -189,9 +198,9 @@ def with_argument_list(*args: List[Callable], preserve_quotes: bool = False) -> def arg_decorator(func: Callable): @functools.wraps(func) - def cmd_wrapper(self, cmdline): - lexed_arglist = parse_quoted_string(cmdline, preserve_quotes) - return func(self, lexed_arglist) + def cmd_wrapper(cmd2_instance, statement: Union[str, Statement]): + parsed_arglist = _get_command_arg_list(statement, preserve_quotes) + return func(cmd2_instance, parsed_arglist) cmd_wrapper.__doc__ = func.__doc__ return cmd_wrapper @@ -214,16 +223,17 @@ def with_argparser_and_unknown_args(argparser: argparse.ArgumentParser, preserve import functools # noinspection PyProtectedMember - def arg_decorator(func: Callable[[Statement], Optional[bool]]): + def arg_decorator(func: Callable): @functools.wraps(func) - def cmd_wrapper(instance, cmdline): - lexed_arglist = parse_quoted_string(cmdline, preserve_quotes) + def cmd_wrapper(cmd2_instance, statement: Union[str, Statement]): + parsed_arglist = _get_command_arg_list(statement, preserve_quotes) + try: - args, unknown = argparser.parse_known_args(lexed_arglist) + args, unknown = argparser.parse_known_args(parsed_arglist) except SystemExit: return else: - return func(instance, args, unknown) + return func(cmd2_instance, args, unknown) # argparser defaults the program name to sys.argv[0] # we want it to be the name of our command @@ -256,16 +266,18 @@ def with_argparser(argparser: argparse.ArgumentParser, import functools # noinspection PyProtectedMember - def arg_decorator(func: Callable[[Statement], Optional[bool]]): + def arg_decorator(func: Callable): @functools.wraps(func) - def cmd_wrapper(instance, cmdline): - lexed_arglist = parse_quoted_string(cmdline, preserve_quotes) + def cmd_wrapper(cmd2_instance, statement: Union[str, Statement]): + + parsed_arglist = _get_command_arg_list(statement, preserve_quotes) + try: - args = argparser.parse_args(lexed_arglist) + args = argparser.parse_args(parsed_arglist) except SystemExit: return else: - return func(instance, args) + return func(cmd2_instance, args) # argparser defaults the program name to sys.argv[0] # we want it to be the name of our command @@ -742,8 +754,7 @@ class Cmd(cmd.Cmd): # Parse the line into tokens while True: try: - # Use non-POSIX parsing to keep the quotes around the tokens - initial_tokens = shlex.split(tmp_line[:tmp_endidx], comments=False, posix=False) + initial_tokens = StatementParser.shlex_split(tmp_line[:tmp_endidx]) # If the cursor is at an empty token outside of a quoted string, # then that is the token being completed. Add it to the list. @@ -1735,7 +1746,7 @@ class Cmd(cmd.Cmd): # Fix those annoying problems that occur with terminal programs like "less" when you pipe to them if self.stdin.isatty(): import subprocess - proc = subprocess.Popen(shlex.split('stty sane')) + proc = subprocess.Popen(['stty', 'sane']) proc.communicate() try: diff --git a/cmd2/parsing.py b/cmd2/parsing.py index 5ec13fb7..86227b5b 100644 --- a/cmd2/parsing.py +++ b/cmd2/parsing.py @@ -349,7 +349,7 @@ class StatementParser: return [] # split on whitespace - tokens = shlex.split(line, comments=False, posix=False) + tokens = StatementParser.shlex_split(line) # custom lexing tokens = self._split_on_punctuation(tokens) @@ -607,6 +607,16 @@ class StatementParser: return command, args + @staticmethod + def shlex_split(str_to_split: str) -> List[str]: + """ + A wrapper around shlex.split() that uses cmd2's preferred arguments + This allows other classes to easily call split() the same way StatementParser does + :param str_to_split: the string being split + :return: A list of tokens + """ + return shlex.split(str_to_split, comments=False, posix=False) + def _split_on_punctuation(self, tokens: List[str]) -> List[str]: """Further splits tokens from a command line using punctuation characters diff --git a/tests/test_argparse.py b/tests/test_argparse.py index f5948f03..74a03e28 100644 --- a/tests/test_argparse.py +++ b/tests/test_argparse.py @@ -72,14 +72,6 @@ class ArgparseApp(cmd2.Cmd): def do_preservelist(self, arglist): self.stdout.write('{}'.format(arglist)) - @cmd2.with_argument_list - @cmd2.with_argument_list - def do_arglisttwice(self, arglist): - if isinstance(arglist, list): - self.stdout.write(' '.join(arglist)) - else: - self.stdout.write('False') - known_parser = argparse.ArgumentParser() known_parser.add_argument('-p', '--piglatin', action='store_true', help='atinLay') known_parser.add_argument('-s', '--shout', action='store_true', help='N00B EMULATION MODE') @@ -178,10 +170,6 @@ def test_preservelist(argparse_app): out = run_cmd(argparse_app, 'preservelist foo "bar baz"') assert out[0] == "['foo', '\"bar baz\"']" -def test_arglist_decorator_twice(argparse_app): - out = run_cmd(argparse_app, 'arglisttwice "we should" get these') - assert out[0] == 'we should get these' - class SubcommandApp(cmd2.Cmd): """ Example cmd2 application where we a base command which has a couple sub-commands.""" |