{
    "file_diffs": [
        {
            "old_file_content": "# emacs: -*- mode: python; py-indent-offset: 4; tab-width: 4; indent-tabs-mode: nil -*-\n# ex: set sts=4 ts=4 sw=4 noet:\n# ## ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ##\n#\n#   See COPYING file distributed along with the datalad package for the\n#   copyright and license terms.\n#\n# ## ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ##\n\"\"\"High-level interface generation\n\n\"\"\"\n\n__docformat__ = 'restructuredtext'\n\nimport logging\nlgr = logging.getLogger('datalad.interface.base')\n\nimport sys\nimport re\nimport textwrap\nimport inspect\nimport string\nfrom collections import (\n    defaultdict,\n    OrderedDict,\n)\nfrom six import iteritems\n\nfrom ..ui import ui\nfrom ..dochelpers import exc_str\n\nfrom datalad.interface.common_opts import eval_params\nfrom datalad.interface.common_opts import eval_defaults\nfrom datalad.support.constraints import EnsureKeyChoice\nfrom datalad.distribution.dataset import Dataset\nfrom datalad.distribution.dataset import resolve_path\n\n\ndefault_logchannels = {\n    '': 'debug',\n    'ok': 'debug',\n    'notneeded': 'debug',\n    'impossible': 'warning',\n    'error': 'error',\n}\n\n\ndef get_api_name(intfspec):\n    \"\"\"Given an interface specification return an API name for it\"\"\"\n    if len(intfspec) > 3:\n        name = intfspec[3]\n    else:\n        name = intfspec[0].split('.')[-1]\n    return name\n\n\ndef get_cmdline_command_name(intfspec):\n    \"\"\"Given an interface specification return a cmdline command name\"\"\"\n    if len(intfspec) > 2:\n        name = intfspec[2]\n    else:\n        name = intfspec[0].split('.')[-1].replace('_', '-')\n    return name\n\n\ndef get_interface_groups():\n    from .. import interface as _interfaces\n\n    grps = []\n    # auto detect all available interfaces and generate a function-based\n    # API from them\n    for _item in _interfaces.__dict__:\n        if not _item.startswith('_group_'):\n            continue\n        grp_name = _item[7:]\n        grp = getattr(_interfaces, _item)\n        grps.append((grp_name,) + grp)\n    return grps\n\n\ndef dedent_docstring(text):\n    \"\"\"Remove uniform indentation from a multiline docstring\"\"\"\n    # Problem is that first line might often have no offset, so might\n    # need to be ignored from dedent call\n    if text is None:\n        return None\n    if not text.startswith(' '):\n        lines = text.split('\\n')\n        if len(lines) == 1:\n            # single line, no indentation, nothing to do\n            return text\n        text2 = '\\n'.join(lines[1:])\n        return lines[0] + \"\\n\" + textwrap.dedent(text2)\n    else:\n        return textwrap.dedent(text)\n\n\ndef alter_interface_docs_for_api(docs):\n    \"\"\"Apply modifications to interface docstrings for Python API use.\"\"\"\n    # central place to alter the impression of docstrings,\n    # like removing cmdline specific sections\n    if not docs:\n        return docs\n    docs = dedent_docstring(docs)\n    # clean cmdline sections\n    docs = re.sub(\n        '\\|\\| CMDLINE \\>\\>.*?\\<\\< CMDLINE \\|\\|',\n        '',\n        docs,\n        flags=re.MULTILINE | re.DOTALL)\n    # clean cmdline in-line bits\n    docs = re.sub(\n        '\\[CMD:\\s[^\\[\\]]*\\sCMD\\]',\n        '',\n        docs,\n        flags=re.MULTILINE | re.DOTALL)\n    docs = re.sub(\n        '\\[PY:\\s([^\\[\\]]*)\\sPY\\]',\n        lambda match: match.group(1),\n        docs,\n        flags=re.MULTILINE)\n    docs = re.sub(\n        '\\|\\| PYTHON \\>\\>(.*?)\\<\\< PYTHON \\|\\|',\n        lambda match: match.group(1),\n        docs,\n        flags=re.MULTILINE | re.DOTALL)\n    docs = re.sub(\n        '\\|\\| REFLOW \\>\\>\\n(.*?)\\<\\< REFLOW \\|\\|',\n        lambda match: textwrap.fill(match.group(1)),\n        docs,\n        flags=re.MULTILINE | re.DOTALL)\n    return docs\n\n\ndef alter_interface_docs_for_cmdline(docs):\n    \"\"\"Apply modifications to interface docstrings for cmdline doc use.\"\"\"\n    # central place to alter the impression of docstrings,\n    # like removing Python API specific sections, and argument markup\n    if not docs:\n        return docs\n    docs = dedent_docstring(docs)\n    # clean cmdline sections\n    docs = re.sub(\n        '\\|\\| PYTHON \\>\\>.*?\\<\\< PYTHON \\|\\|',\n        '',\n        docs,\n        flags=re.MULTILINE | re.DOTALL)\n    # clean cmdline in-line bits\n    docs = re.sub(\n        '\\[PY:\\s[^\\[\\]]*\\sPY\\]',\n        '',\n        docs,\n        flags=re.MULTILINE | re.DOTALL)\n    docs = re.sub(\n        '\\[CMD:\\s([^\\[\\]]*)\\sCMD\\]',\n        lambda match: match.group(1),\n        docs,\n        flags=re.MULTILINE)\n    docs = re.sub(\n        '\\|\\| CMDLINE \\>\\>(.*?)\\<\\< CMDLINE \\|\\|',\n        lambda match: match.group(1),\n        docs,\n        flags=re.MULTILINE | re.DOTALL)\n    # remove :role:`...` RST markup for cmdline docs\n    docs = re.sub(\n        r':\\S+:`[^`]*`[\\\\]*',\n        lambda match: ':'.join(match.group(0).split(':')[2:]).strip('`\\\\'),\n        docs,\n        flags=re.MULTILINE | re.DOTALL)\n    # remove None constraint. In general, `None` on the cmdline means don't\n    # give option at all, but specifying `None` explicitly is practically\n    # impossible\n    docs = re.sub(\n        ',\\sor\\svalue\\smust\\sbe\\s`None`',\n        '',\n        docs,\n        flags=re.MULTILINE | re.DOTALL)\n    # capitalize variables and remove backticks to uniformize with\n    # argparse output\n    docs = re.sub(\n        '`\\S*`',\n        lambda match: match.group(0).strip('`').upper(),\n        docs)\n    # clean up sphinx API refs\n    docs = re.sub(\n        '\\~datalad\\.api\\.\\S*',\n        lambda match: \"`{0}`\".format(match.group(0)[13:]),\n        docs)\n    # Remove RST paragraph markup\n    docs = re.sub(\n        r'^.. \\S+::',\n        lambda match: match.group(0)[3:-2].upper(),\n        docs,\n        flags=re.MULTILINE)\n    docs = re.sub(\n        '\\|\\| REFLOW \\>\\>\\n(.*?)\\<\\< REFLOW \\|\\|',\n        lambda match: textwrap.fill(match.group(1)),\n        docs,\n        flags=re.MULTILINE | re.DOTALL)\n    return docs\n\n\ndef is_api_arg(arg):\n    \"\"\"Return True if argument is our API argument or self or used for internal\n    purposes\n    \"\"\"\n    return arg != 'self' and not arg.startswith('_')\n\n\ndef update_docstring_with_parameters(func, params, prefix=None, suffix=None,\n                                     add_args=None):\n    \"\"\"Generate a useful docstring from a parameter spec\n\n    Amends any existing docstring of a callable with a textual\n    description of its parameters. The Parameter spec needs to match\n    the number and names of the callables arguments.\n    \"\"\"\n    from inspect import getargspec\n    # get the signature\n    ndefaults = 0\n    args, varargs, varkw, defaults = getargspec(func)\n    if add_args:\n        add_argnames = sorted(add_args.keys())\n        args.extend(add_argnames)\n        defaults = defaults + tuple(add_args[k] for k in add_argnames)\n    if defaults is not None:\n        ndefaults = len(defaults)\n    # start documentation with what the callable brings with it\n    doc = prefix if prefix else u''\n    if len(args) > 1:\n        if len(doc):\n            doc += '\\n'\n        doc += \"Parameters\\n----------\\n\"\n        for i, arg in enumerate(args):\n            if not is_api_arg(arg):\n                continue\n            # we need a parameter spec for each argument\n            if not arg in params:\n                raise ValueError(\"function has argument '%s' not described as a parameter\" % arg)\n            param = params[arg]\n            # validate the default -- to make sure that the parameter description is\n            # somewhat OK\n            defaults_idx = ndefaults - len(args) + i\n            if defaults_idx >= 0:\n                if param.constraints is not None:\n                    param.constraints(defaults[defaults_idx])\n            orig_docs = param._doc\n            param._doc = alter_interface_docs_for_api(param._doc)\n            doc += param.get_autodoc(\n                arg,\n                default=defaults[defaults_idx] if defaults_idx >= 0 else None,\n                has_default=defaults_idx >= 0)\n            param._doc = orig_docs\n            doc += '\\n'\n    doc += suffix if suffix else u\"\"\n    # assign the amended docs\n    func.__doc__ = doc\n    return func\n\n\ndef build_doc(cls, **kwargs):\n    \"\"\"Decorator to build docstrings for datalad commands\n\n    It's intended to decorate the class, the __call__-method of which is the\n    actual command. It expects that __call__-method to be decorated by\n    eval_results.\n\n    Parameters\n    ----------\n    cls: Interface\n      class defining a datalad command\n    \"\"\"\n\n    # Note, that this is a class decorator, which is executed only once when the\n    # class is imported. It builds the docstring for the class' __call__ method\n    # and returns the original class.\n    #\n    # This is because a decorator for the actual function would not be able to\n    # behave like this. To build the docstring we need to access the attribute\n    # _params of the class. From within a function decorator we cannot do this\n    # during import time, since the class is being built in this very moment and\n    # is not yet available in the module. And if we do it from within the part\n    # of a function decorator, that is executed when the function is called, we\n    # would need to actually call the command once in order to build this\n    # docstring.\n\n    lgr.debug(\"Building doc for {}\".format(cls))\n\n    cls_doc = cls.__doc__\n    if hasattr(cls, '_docs_'):\n        # expand docs\n        cls_doc = cls_doc.format(**cls._docs_)\n\n    call_doc = None\n    # suffix for update_docstring_with_parameters:\n    if cls.__call__.__doc__:\n        call_doc = cls.__call__.__doc__\n\n    # build standard doc and insert eval_doc\n    spec = getattr(cls, '_params_', dict())\n    # get docs for eval_results parameters:\n    spec.update(eval_params)\n\n    update_docstring_with_parameters(\n        cls.__call__, spec,\n        prefix=alter_interface_docs_for_api(cls_doc),\n        suffix=alter_interface_docs_for_api(call_doc),\n        add_args=eval_defaults if not hasattr(cls, '_no_eval_results') else None\n    )\n\n    # return original\n    return cls\n\n\nNA_STRING = 'N/A'  # we might want to make it configurable via config\n\n\nclass nagen(object):\n    \"\"\"A helper to provide a desired missing value if no value is known\n\n    Usecases\n    - could be used as a generator for `defaultdict`\n    - since it returns itself upon getitem, should work even for complex\n      nested dictionaries/lists .format templates\n    \"\"\"\n    def __init__(self, missing=NA_STRING):\n        self.missing = missing\n\n    def __str__(self):\n        return self.missing\n\n    def __getitem__(self, *args):\n        return self\n\n    def __getattr__(self, item):\n        return self\n\n\ndef nadict(*items):\n    \"\"\"A generator of default dictionary with the default nagen\"\"\"\n    dd = defaultdict(nagen)\n    dd.update(*items)\n    return dd\n\n\nclass DefaultOutputFormatter(string.Formatter):\n    \"\"\"A custom formatter for default output rendering using .format\n    \"\"\"\n    # TODO: make missing configurable?\n    def __init__(self, missing=nagen()):\n        \"\"\"\n        Parameters\n        ----------\n        missing: string, optional\n          What to output for the missing values\n        \"\"\"\n        super(DefaultOutputFormatter, self).__init__()\n        self.missing = missing\n\n    def _d(self, msg, *args):\n        # print(\"   HERE %s\" % (msg % args))\n        pass\n\n    def get_value(self, key, args, kwds):\n        assert not args\n        self._d(\"get_value: %r %r %r\", key, args, kwds)\n        return kwds.get(key, self.missing)\n\n    # def get_field(self, field_name, args, kwds):\n    #     assert not args\n    #     self._d(\"get_field: %r args=%r kwds=%r\" % (field_name, args, kwds))\n    #     try:\n    #         out = string.Formatter.get_field(self, field_name, args, kwds)\n    #     except Exception as exc:\n    #         # TODO needs more than just a value\n    #         return \"!ERR %s\" % exc\n\n\nclass DefaultOutputRenderer(object):\n    \"\"\"A default renderer for .format'ed output line\n    \"\"\"\n    def __init__(self, format):\n        self.format = format\n        # We still need custom output formatter since at the \"first level\"\n        # within .format template all items there is no `nadict`\n        self.formatter = DefaultOutputFormatter()\n\n    @classmethod\n    def _dict_to_nadict(cls, v):\n        \"\"\"Traverse datastructure and replace any regular dict with nadict\"\"\"\n        if isinstance(v, list):\n            return [cls._dict_to_nadict(x) for x in v]\n        elif isinstance(v, dict):\n            return nadict((k, cls._dict_to_nadict(x)) for k, x in iteritems(v))\n        else:\n            return v\n\n    def __call__(self, x, **kwargs):\n        dd = nadict(\n            (k, nadict({k_.replace(':', '#'): self._dict_to_nadict(v_)\n                for k_, v_ in v.items()})\n                if isinstance(v, dict) else v)\n            for k, v in x.items()\n        )\n\n        msg = self.formatter.format(self.format, **dd)\n        return ui.message(msg)\n\n\nclass Interface(object):\n    \"\"\"Base class for interface implementations\"\"\"\n\n    # exit code to return if user-interrupted\n    # if None, would just reraise the Exception, so if in --dbg\n    # mode would fall into the debugger\n    _interrupted_exit_code = 1\n\n    _OLDSTYLE_COMMANDS = (\n        'AddArchiveContent', 'CrawlInit', 'Crawl', 'CreateSiblingGithub',\n        'CreateTestDataset', 'Export', 'Ls', 'SSHRun', 'Test')\n\n    @classmethod\n    def setup_parser(cls, parser):\n        # XXX needs safety check for name collisions\n        # XXX allow for parser kwargs customization\n        parser_kwargs = {}\n        from inspect import getargspec\n        # get the signature\n        ndefaults = 0\n        args, varargs, varkw, defaults = getargspec(cls.__call__)\n        if not defaults is None:\n            ndefaults = len(defaults)\n        for i, arg in enumerate(args):\n            if not is_api_arg(arg):\n                continue\n            param = cls._params_[arg]\n            defaults_idx = ndefaults - len(args) + i\n            cmd_args = param.cmd_args\n            if cmd_args is None:\n                cmd_args = []\n            if not len(cmd_args):\n                if defaults_idx >= 0:\n                    # dealing with a kwarg\n                    template = '--%s'\n                else:\n                    # positional arg\n                    template = '%s'\n                # use parameter name as default argument name\n                parser_args = (template % arg.replace('_', '-'),)\n            else:\n                parser_args = [c.replace('_', '-') for c in cmd_args]\n            parser_kwargs = param.cmd_kwargs\n            if defaults_idx >= 0:\n                parser_kwargs['default'] = defaults[defaults_idx]\n            help = alter_interface_docs_for_cmdline(param._doc)\n            if help and help[-1] != '.':\n                help += '.'\n            if param.constraints is not None:\n                parser_kwargs['type'] = param.constraints\n                # include value constraint description and default\n                # into the help string\n                cdoc = alter_interface_docs_for_cmdline(\n                    param.constraints.long_description())\n                if cdoc[0] == '(' and cdoc[-1] == ')':\n                    cdoc = cdoc[1:-1]\n                help += '  Constraints: %s' % cdoc\n            if defaults_idx >= 0:\n                help += \" [Default: %r]\" % (defaults[defaults_idx],)\n            # create the parameter, using the constraint instance for type\n            # conversion\n            parser.add_argument(*parser_args, help=help,\n                                **parser_kwargs)\n\n    @classmethod\n    def call_from_parser(cls, args):\n        # XXX needs safety check for name collisions\n        from inspect import getargspec\n        argspec = getargspec(cls.__call__)\n        if argspec[2] is None:\n            # no **kwargs in the call receiver, pull argnames from signature\n            argnames = getargspec(cls.__call__)[0]\n        else:\n            # common options\n            # XXX define or better get from elsewhere\n            common_opts = ('change_path', 'common_debug', 'common_idebug', 'func',\n                           'help', 'log_level', 'logger', 'pbs_runner',\n                           'result_renderer', 'proc_pre', 'proc_post', 'subparser')\n            argnames = [name for name in dir(args)\n                        if not (name.startswith('_') or name in common_opts)]\n        kwargs = {k: getattr(args, k) for k in argnames if is_api_arg(k)}\n        # we are coming from the entry point, this is the toplevel command,\n        # let it run like generator so we can act on partial results quicker\n        # TODO remove following condition test when transition is complete and\n        # run indented code unconditionally\n        if cls.__name__ not in Interface._OLDSTYLE_COMMANDS:\n            # set all common args explicitly  to override class defaults\n            # that are tailored towards the the Python API\n            kwargs['return_type'] = 'generator'\n            kwargs['result_xfm'] = None\n            # allow commands to override the default, unless something other than\n            # default is requested\n            kwargs['result_renderer'] = \\\n                args.common_output_format if args.common_output_format != 'default' \\\n                else getattr(cls, 'result_renderer', args.common_output_format)\n            if '{' in args.common_output_format:\n                # stupid hack, could and should become more powerful\n                kwargs['result_renderer'] = DefaultOutputRenderer(args.common_output_format)\n\n            if args.common_on_failure:\n                kwargs['on_failure'] = args.common_on_failure\n            # compose filter function from to be invented cmdline options\n            res_filter = cls._get_result_filter(args)\n            if res_filter is not None:\n                # Don't add result_filter if it's None because then\n                # eval_results can't distinguish between --report-{status,type}\n                # not specified via the CLI and None passed via the Python API.\n                kwargs['result_filter'] = res_filter\n            kwargs['proc_pre'] = args.common_proc_pre\n            kwargs['proc_post'] = args.common_proc_post\n        try:\n            ret = cls.__call__(**kwargs)\n            if inspect.isgenerator(ret):\n                ret = list(ret)\n            if args.common_output_format == 'tailored' and \\\n                    hasattr(cls, 'custom_result_summary_renderer'):\n                cls.custom_result_summary_renderer(ret)\n            return ret\n        except KeyboardInterrupt as exc:\n            ui.error(\"\\nInterrupted by user while doing magic: %s\" % exc_str(exc))\n            if cls._interrupted_exit_code is not None:\n                sys.exit(cls._interrupted_exit_code)\n            else:\n                raise\n\n    @classmethod\n    def _get_result_filter(cls, args):\n        from datalad import cfg\n        result_filter = None\n        if args.common_report_status or 'datalad.runtime.report-status' in cfg:\n            report_status = args.common_report_status or \\\n                            cfg.obtain('datalad.runtime.report-status')\n            if report_status == \"all\":\n                pass  # no filter\n            elif report_status == 'success':\n                result_filter = EnsureKeyChoice('status', ('ok', 'notneeded'))\n            elif report_status == 'failure':\n                result_filter = EnsureKeyChoice('status',\n                                                ('impossible', 'error'))\n            else:\n                result_filter = EnsureKeyChoice('status', (report_status,))\n        if args.common_report_type:\n            tfilt = EnsureKeyChoice('type', tuple(args.common_report_type))\n            result_filter = result_filter & tfilt if result_filter else tfilt\n        return result_filter\n\n    @classmethod\n    def get_refds_path(cls, dataset):\n        \"\"\"Return a resolved reference dataset path from a `dataset` argument\"\"\"\n        # theoretically a dataset could come in as a relative path -> resolve\n        if dataset is None:\n            return dataset\n        refds_path = dataset.path if isinstance(dataset, Dataset) \\\n            else Dataset(dataset).path\n        if refds_path:\n            refds_path = resolve_path(refds_path)\n        return refds_path\n\n\ndef get_allargs_as_kwargs(call, args, kwargs):\n    \"\"\"Generate a kwargs dict from a call signature and *args, **kwargs\n\n    Basically resolving the argnames for all positional arguments, and\n    resolvin the defaults for all kwargs that are not given in a kwargs\n    dict\n    \"\"\"\n    from inspect import getargspec\n    argspec = getargspec(call)\n    defaults = argspec.defaults\n    nargs = len(argspec.args)\n    assert (nargs >= len(defaults))\n    # map any args to their name\n    argmap = list(zip(argspec.args[:len(args)], args))\n    kwargs_ = OrderedDict(argmap)\n    # map defaults of kwargs to their names (update below)\n    for k, v in zip(argspec.args[-len(defaults):], defaults):\n        if k not in kwargs_:\n            kwargs_[k] = v\n    # update with provided kwarg args\n    kwargs_.update(kwargs)\n    # XXX we cannot assert the following, because our own highlevel\n    # API commands support more kwargs than what is discoverable\n    # from their signature...\n    #assert (nargs == len(kwargs_))\n    return kwargs_\n",
            "new_file_content": "# emacs: -*- mode: python; py-indent-offset: 4; tab-width: 4; indent-tabs-mode: nil -*-\n# ex: set sts=4 ts=4 sw=4 noet:\n# ## ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ##\n#\n#   See COPYING file distributed along with the datalad package for the\n#   copyright and license terms.\n#\n# ## ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ##\n\"\"\"High-level interface generation\n\n\"\"\"\n\n__docformat__ = 'restructuredtext'\n\nimport logging\nlgr = logging.getLogger('datalad.interface.base')\n\nimport sys\nimport re\nimport textwrap\nimport inspect\nimport string\nfrom collections import (\n    defaultdict,\n    OrderedDict,\n)\nfrom six import iteritems\n\nfrom ..ui import ui\nfrom ..dochelpers import exc_str\n\nfrom datalad.interface.common_opts import eval_params\nfrom datalad.interface.common_opts import eval_defaults\nfrom datalad.support.constraints import EnsureKeyChoice\nfrom datalad.distribution.dataset import Dataset\nfrom datalad.distribution.dataset import resolve_path\n\n\ndefault_logchannels = {\n    '': 'debug',\n    'ok': 'debug',\n    'notneeded': 'debug',\n    'impossible': 'warning',\n    'error': 'error',\n}\n\n\ndef get_api_name(intfspec):\n    \"\"\"Given an interface specification return an API name for it\"\"\"\n    if len(intfspec) > 3:\n        name = intfspec[3]\n    else:\n        name = intfspec[0].split('.')[-1]\n    return name\n\n\ndef get_cmdline_command_name(intfspec):\n    \"\"\"Given an interface specification return a cmdline command name\"\"\"\n    if len(intfspec) > 2:\n        name = intfspec[2]\n    else:\n        name = intfspec[0].split('.')[-1].replace('_', '-')\n    return name\n\n\ndef get_interface_groups():\n    from .. import interface as _interfaces\n\n    grps = []\n    # auto detect all available interfaces and generate a function-based\n    # API from them\n    for _item in _interfaces.__dict__:\n        if not _item.startswith('_group_'):\n            continue\n        grp_name = _item[7:]\n        grp = getattr(_interfaces, _item)\n        grps.append((grp_name,) + grp)\n    return grps\n\n\ndef dedent_docstring(text):\n    \"\"\"Remove uniform indentation from a multiline docstring\"\"\"\n    # Problem is that first line might often have no offset, so might\n    # need to be ignored from dedent call\n    if text is None:\n        return None\n    if not text.startswith(' '):\n        lines = text.split('\\n')\n        if len(lines) == 1:\n            # single line, no indentation, nothing to do\n            return text\n        text2 = '\\n'.join(lines[1:])\n        return lines[0] + \"\\n\" + textwrap.dedent(text2)\n    else:\n        return textwrap.dedent(text)\n\n\ndef alter_interface_docs_for_api(docs):\n    \"\"\"Apply modifications to interface docstrings for Python API use.\"\"\"\n    # central place to alter the impression of docstrings,\n    # like removing cmdline specific sections\n    if not docs:\n        return docs\n    docs = dedent_docstring(docs)\n    # clean cmdline sections\n    docs = re.sub(\n        '\\|\\| CMDLINE \\>\\>.*?\\<\\< CMDLINE \\|\\|',\n        '',\n        docs,\n        flags=re.MULTILINE | re.DOTALL)\n    # clean cmdline in-line bits\n    docs = re.sub(\n        '\\[CMD:\\s[^\\[\\]]*\\sCMD\\]',\n        '',\n        docs,\n        flags=re.MULTILINE | re.DOTALL)\n    docs = re.sub(\n        '\\[PY:\\s([^\\[\\]]*)\\sPY\\]',\n        lambda match: match.group(1),\n        docs,\n        flags=re.MULTILINE)\n    docs = re.sub(\n        '\\|\\| PYTHON \\>\\>(.*?)\\<\\< PYTHON \\|\\|',\n        lambda match: match.group(1),\n        docs,\n        flags=re.MULTILINE | re.DOTALL)\n    docs = re.sub(\n        '\\|\\| REFLOW \\>\\>\\n(.*?)\\<\\< REFLOW \\|\\|',\n        lambda match: textwrap.fill(match.group(1)),\n        docs,\n        flags=re.MULTILINE | re.DOTALL)\n    return docs\n\n\ndef alter_interface_docs_for_cmdline(docs):\n    \"\"\"Apply modifications to interface docstrings for cmdline doc use.\"\"\"\n    # central place to alter the impression of docstrings,\n    # like removing Python API specific sections, and argument markup\n    if not docs:\n        return docs\n    docs = dedent_docstring(docs)\n    # clean cmdline sections\n    docs = re.sub(\n        '\\|\\| PYTHON \\>\\>.*?\\<\\< PYTHON \\|\\|',\n        '',\n        docs,\n        flags=re.MULTILINE | re.DOTALL)\n    # clean cmdline in-line bits\n    docs = re.sub(\n        '\\[PY:\\s[^\\[\\]]*\\sPY\\]',\n        '',\n        docs,\n        flags=re.MULTILINE | re.DOTALL)\n    docs = re.sub(\n        '\\[CMD:\\s([^\\[\\]]*)\\sCMD\\]',\n        lambda match: match.group(1),\n        docs,\n        flags=re.MULTILINE)\n    docs = re.sub(\n        '\\|\\| CMDLINE \\>\\>(.*?)\\<\\< CMDLINE \\|\\|',\n        lambda match: match.group(1),\n        docs,\n        flags=re.MULTILINE | re.DOTALL)\n    # remove :role:`...` RST markup for cmdline docs\n    docs = re.sub(\n        r':\\S+:`[^`]*`[\\\\]*',\n        lambda match: ':'.join(match.group(0).split(':')[2:]).strip('`\\\\'),\n        docs,\n        flags=re.MULTILINE | re.DOTALL)\n    # remove None constraint. In general, `None` on the cmdline means don't\n    # give option at all, but specifying `None` explicitly is practically\n    # impossible\n    docs = re.sub(\n        ',\\sor\\svalue\\smust\\sbe\\s`None`',\n        '',\n        docs,\n        flags=re.MULTILINE | re.DOTALL)\n    # capitalize variables and remove backticks to uniformize with\n    # argparse output\n    docs = re.sub(\n        '`\\S*`',\n        lambda match: match.group(0).strip('`').upper(),\n        docs)\n    # clean up sphinx API refs\n    docs = re.sub(\n        '\\~datalad\\.api\\.\\S*',\n        lambda match: \"`{0}`\".format(match.group(0)[13:]),\n        docs)\n    # Remove RST paragraph markup\n    docs = re.sub(\n        r'^.. \\S+::',\n        lambda match: match.group(0)[3:-2].upper(),\n        docs,\n        flags=re.MULTILINE)\n    docs = re.sub(\n        '\\|\\| REFLOW \\>\\>\\n(.*?)\\<\\< REFLOW \\|\\|',\n        lambda match: textwrap.fill(match.group(1)),\n        docs,\n        flags=re.MULTILINE | re.DOTALL)\n    return docs\n\n\ndef is_api_arg(arg):\n    \"\"\"Return True if argument is our API argument or self or used for internal\n    purposes\n    \"\"\"\n    return arg != 'self' and not arg.startswith('_')\n\n\ndef update_docstring_with_parameters(func, params, prefix=None, suffix=None,\n                                     add_args=None):\n    \"\"\"Generate a useful docstring from a parameter spec\n\n    Amends any existing docstring of a callable with a textual\n    description of its parameters. The Parameter spec needs to match\n    the number and names of the callables arguments.\n    \"\"\"\n    from inspect import getargspec\n    # get the signature\n    ndefaults = 0\n    args, varargs, varkw, defaults = getargspec(func)\n    if add_args:\n        add_argnames = sorted(add_args.keys())\n        args.extend(add_argnames)\n        defaults = defaults + tuple(add_args[k] for k in add_argnames)\n    if defaults is not None:\n        ndefaults = len(defaults)\n    # start documentation with what the callable brings with it\n    doc = prefix if prefix else u''\n    if len(args) > 1:\n        if len(doc):\n            doc += '\\n'\n        doc += \"Parameters\\n----------\\n\"\n        for i, arg in enumerate(args):\n            if not is_api_arg(arg):\n                continue\n            # we need a parameter spec for each argument\n            if not arg in params:\n                raise ValueError(\"function has argument '%s' not described as a parameter\" % arg)\n            param = params[arg]\n            # validate the default -- to make sure that the parameter description is\n            # somewhat OK\n            defaults_idx = ndefaults - len(args) + i\n            if defaults_idx >= 0:\n                if param.constraints is not None:\n                    param.constraints(defaults[defaults_idx])\n            orig_docs = param._doc\n            param._doc = alter_interface_docs_for_api(param._doc)\n            doc += param.get_autodoc(\n                arg,\n                default=defaults[defaults_idx] if defaults_idx >= 0 else None,\n                has_default=defaults_idx >= 0)\n            param._doc = orig_docs\n            doc += '\\n'\n    doc += suffix if suffix else u\"\"\n    # assign the amended docs\n    func.__doc__ = doc\n    return func\n\n\ndef build_doc(cls, **kwargs):\n    \"\"\"Decorator to build docstrings for datalad commands\n\n    It's intended to decorate the class, the __call__-method of which is the\n    actual command. It expects that __call__-method to be decorated by\n    eval_results.\n\n    Parameters\n    ----------\n    cls: Interface\n      class defining a datalad command\n    \"\"\"\n\n    # Note, that this is a class decorator, which is executed only once when the\n    # class is imported. It builds the docstring for the class' __call__ method\n    # and returns the original class.\n    #\n    # This is because a decorator for the actual function would not be able to\n    # behave like this. To build the docstring we need to access the attribute\n    # _params of the class. From within a function decorator we cannot do this\n    # during import time, since the class is being built in this very moment and\n    # is not yet available in the module. And if we do it from within the part\n    # of a function decorator, that is executed when the function is called, we\n    # would need to actually call the command once in order to build this\n    # docstring.\n\n    lgr.debug(\"Building doc for {}\".format(cls))\n\n    cls_doc = cls.__doc__\n    if hasattr(cls, '_docs_'):\n        # expand docs\n        cls_doc = cls_doc.format(**cls._docs_)\n\n    call_doc = None\n    # suffix for update_docstring_with_parameters:\n    if cls.__call__.__doc__:\n        call_doc = cls.__call__.__doc__\n\n    # build standard doc and insert eval_doc\n    spec = getattr(cls, '_params_', dict())\n    # get docs for eval_results parameters:\n    spec.update(eval_params)\n\n    update_docstring_with_parameters(\n        cls.__call__, spec,\n        prefix=alter_interface_docs_for_api(cls_doc),\n        suffix=alter_interface_docs_for_api(call_doc),\n        add_args=eval_defaults if not hasattr(cls, '_no_eval_results') else None\n    )\n\n    # return original\n    return cls\n\n\nNA_STRING = 'N/A'  # we might want to make it configurable via config\n\n\nclass nagen(object):\n    \"\"\"A helper to provide a desired missing value if no value is known\n\n    Usecases\n    - could be used as a generator for `defaultdict`\n    - since it returns itself upon getitem, should work even for complex\n      nested dictionaries/lists .format templates\n    \"\"\"\n    def __init__(self, missing=NA_STRING):\n        self.missing = missing\n\n    def __repr__(self):\n        cls = self.__class__.__name__\n        args = str(self.missing) if self.missing != NA_STRING else ''\n        return '%s(%s)' % (cls, args)\n\n    def __str__(self):\n        return self.missing\n\n    def __getitem__(self, *args):\n        return self\n\n    def __getattr__(self, item):\n        return self\n\n\ndef nadict(*items):\n    \"\"\"A generator of default dictionary with the default nagen\"\"\"\n    dd = defaultdict(nagen)\n    dd.update(*items)\n    return dd\n\n\nclass DefaultOutputFormatter(string.Formatter):\n    \"\"\"A custom formatter for default output rendering using .format\n    \"\"\"\n    # TODO: make missing configurable?\n    def __init__(self, missing=nagen()):\n        \"\"\"\n        Parameters\n        ----------\n        missing: string, optional\n          What to output for the missing values\n        \"\"\"\n        super(DefaultOutputFormatter, self).__init__()\n        self.missing = missing\n\n    def _d(self, msg, *args):\n        # print(\"   HERE %s\" % (msg % args))\n        pass\n\n    def get_value(self, key, args, kwds):\n        assert not args\n        self._d(\"get_value: %r %r %r\", key, args, kwds)\n        return kwds.get(key, self.missing)\n\n    # def get_field(self, field_name, args, kwds):\n    #     assert not args\n    #     self._d(\"get_field: %r args=%r kwds=%r\" % (field_name, args, kwds))\n    #     try:\n    #         out = string.Formatter.get_field(self, field_name, args, kwds)\n    #     except Exception as exc:\n    #         # TODO needs more than just a value\n    #         return \"!ERR %s\" % exc\n\n\nclass DefaultOutputRenderer(object):\n    \"\"\"A default renderer for .format'ed output line\n    \"\"\"\n    def __init__(self, format):\n        self.format = format\n        # We still need custom output formatter since at the \"first level\"\n        # within .format template all items there is no `nadict`\n        self.formatter = DefaultOutputFormatter()\n\n    @classmethod\n    def _dict_to_nadict(cls, v):\n        \"\"\"Traverse datastructure and replace any regular dict with nadict\"\"\"\n        if isinstance(v, list):\n            return [cls._dict_to_nadict(x) for x in v]\n        elif isinstance(v, dict):\n            return nadict((k, cls._dict_to_nadict(x)) for k, x in iteritems(v))\n        else:\n            return v\n\n    def __call__(self, x, **kwargs):\n        dd = nadict(\n            (k, nadict({k_.replace(':', '#'): self._dict_to_nadict(v_)\n                for k_, v_ in v.items()})\n                if isinstance(v, dict) else v)\n            for k, v in x.items()\n        )\n\n        msg = self.formatter.format(self.format, **dd)\n        return ui.message(msg)\n\n\nclass Interface(object):\n    \"\"\"Base class for interface implementations\"\"\"\n\n    # exit code to return if user-interrupted\n    # if None, would just reraise the Exception, so if in --dbg\n    # mode would fall into the debugger\n    _interrupted_exit_code = 1\n\n    _OLDSTYLE_COMMANDS = (\n        'AddArchiveContent', 'CrawlInit', 'Crawl', 'CreateSiblingGithub',\n        'CreateTestDataset', 'Export', 'Ls', 'SSHRun', 'Test')\n\n    @classmethod\n    def setup_parser(cls, parser):\n        # XXX needs safety check for name collisions\n        # XXX allow for parser kwargs customization\n        parser_kwargs = {}\n        from inspect import getargspec\n        # get the signature\n        ndefaults = 0\n        args, varargs, varkw, defaults = getargspec(cls.__call__)\n        if not defaults is None:\n            ndefaults = len(defaults)\n        for i, arg in enumerate(args):\n            if not is_api_arg(arg):\n                continue\n            param = cls._params_[arg]\n            defaults_idx = ndefaults - len(args) + i\n            cmd_args = param.cmd_args\n            if cmd_args is None:\n                cmd_args = []\n            if not len(cmd_args):\n                if defaults_idx >= 0:\n                    # dealing with a kwarg\n                    template = '--%s'\n                else:\n                    # positional arg\n                    template = '%s'\n                # use parameter name as default argument name\n                parser_args = (template % arg.replace('_', '-'),)\n            else:\n                parser_args = [c.replace('_', '-') for c in cmd_args]\n            parser_kwargs = param.cmd_kwargs\n            if defaults_idx >= 0:\n                parser_kwargs['default'] = defaults[defaults_idx]\n            help = alter_interface_docs_for_cmdline(param._doc)\n            if help and help[-1] != '.':\n                help += '.'\n            if param.constraints is not None:\n                parser_kwargs['type'] = param.constraints\n                # include value constraint description and default\n                # into the help string\n                cdoc = alter_interface_docs_for_cmdline(\n                    param.constraints.long_description())\n                if cdoc[0] == '(' and cdoc[-1] == ')':\n                    cdoc = cdoc[1:-1]\n                help += '  Constraints: %s' % cdoc\n            if defaults_idx >= 0:\n                help += \" [Default: %r]\" % (defaults[defaults_idx],)\n            # create the parameter, using the constraint instance for type\n            # conversion\n            parser.add_argument(*parser_args, help=help,\n                                **parser_kwargs)\n\n    @classmethod\n    def call_from_parser(cls, args):\n        # XXX needs safety check for name collisions\n        from inspect import getargspec\n        argspec = getargspec(cls.__call__)\n        if argspec[2] is None:\n            # no **kwargs in the call receiver, pull argnames from signature\n            argnames = getargspec(cls.__call__)[0]\n        else:\n            # common options\n            # XXX define or better get from elsewhere\n            common_opts = ('change_path', 'common_debug', 'common_idebug', 'func',\n                           'help', 'log_level', 'logger', 'pbs_runner',\n                           'result_renderer', 'proc_pre', 'proc_post', 'subparser')\n            argnames = [name for name in dir(args)\n                        if not (name.startswith('_') or name in common_opts)]\n        kwargs = {k: getattr(args, k) for k in argnames if is_api_arg(k)}\n        # we are coming from the entry point, this is the toplevel command,\n        # let it run like generator so we can act on partial results quicker\n        # TODO remove following condition test when transition is complete and\n        # run indented code unconditionally\n        if cls.__name__ not in Interface._OLDSTYLE_COMMANDS:\n            # set all common args explicitly  to override class defaults\n            # that are tailored towards the the Python API\n            kwargs['return_type'] = 'generator'\n            kwargs['result_xfm'] = None\n            # allow commands to override the default, unless something other than\n            # default is requested\n            kwargs['result_renderer'] = \\\n                args.common_output_format if args.common_output_format != 'default' \\\n                else getattr(cls, 'result_renderer', args.common_output_format)\n            if '{' in args.common_output_format:\n                # stupid hack, could and should become more powerful\n                kwargs['result_renderer'] = DefaultOutputRenderer(args.common_output_format)\n\n            if args.common_on_failure:\n                kwargs['on_failure'] = args.common_on_failure\n            # compose filter function from to be invented cmdline options\n            res_filter = cls._get_result_filter(args)\n            if res_filter is not None:\n                # Don't add result_filter if it's None because then\n                # eval_results can't distinguish between --report-{status,type}\n                # not specified via the CLI and None passed via the Python API.\n                kwargs['result_filter'] = res_filter\n            kwargs['proc_pre'] = args.common_proc_pre\n            kwargs['proc_post'] = args.common_proc_post\n        try:\n            ret = cls.__call__(**kwargs)\n            if inspect.isgenerator(ret):\n                ret = list(ret)\n            if args.common_output_format == 'tailored' and \\\n                    hasattr(cls, 'custom_result_summary_renderer'):\n                cls.custom_result_summary_renderer(ret)\n            return ret\n        except KeyboardInterrupt as exc:\n            ui.error(\"\\nInterrupted by user while doing magic: %s\" % exc_str(exc))\n            if cls._interrupted_exit_code is not None:\n                sys.exit(cls._interrupted_exit_code)\n            else:\n                raise\n\n    @classmethod\n    def _get_result_filter(cls, args):\n        from datalad import cfg\n        result_filter = None\n        if args.common_report_status or 'datalad.runtime.report-status' in cfg:\n            report_status = args.common_report_status or \\\n                            cfg.obtain('datalad.runtime.report-status')\n            if report_status == \"all\":\n                pass  # no filter\n            elif report_status == 'success':\n                result_filter = EnsureKeyChoice('status', ('ok', 'notneeded'))\n            elif report_status == 'failure':\n                result_filter = EnsureKeyChoice('status',\n                                                ('impossible', 'error'))\n            else:\n                result_filter = EnsureKeyChoice('status', (report_status,))\n        if args.common_report_type:\n            tfilt = EnsureKeyChoice('type', tuple(args.common_report_type))\n            result_filter = result_filter & tfilt if result_filter else tfilt\n        return result_filter\n\n    @classmethod\n    def get_refds_path(cls, dataset):\n        \"\"\"Return a resolved reference dataset path from a `dataset` argument\"\"\"\n        # theoretically a dataset could come in as a relative path -> resolve\n        if dataset is None:\n            return dataset\n        refds_path = dataset.path if isinstance(dataset, Dataset) \\\n            else Dataset(dataset).path\n        if refds_path:\n            refds_path = resolve_path(refds_path)\n        return refds_path\n\n\ndef get_allargs_as_kwargs(call, args, kwargs):\n    \"\"\"Generate a kwargs dict from a call signature and *args, **kwargs\n\n    Basically resolving the argnames for all positional arguments, and\n    resolvin the defaults for all kwargs that are not given in a kwargs\n    dict\n    \"\"\"\n    from inspect import getargspec\n    argspec = getargspec(call)\n    defaults = argspec.defaults\n    nargs = len(argspec.args)\n    assert (nargs >= len(defaults))\n    # map any args to their name\n    argmap = list(zip(argspec.args[:len(args)], args))\n    kwargs_ = OrderedDict(argmap)\n    # map defaults of kwargs to their names (update below)\n    for k, v in zip(argspec.args[-len(defaults):], defaults):\n        if k not in kwargs_:\n            kwargs_[k] = v\n    # update with provided kwarg args\n    kwargs_.update(kwargs)\n    # XXX we cannot assert the following, because our own highlevel\n    # API commands support more kwargs than what is discoverable\n    # from their signature...\n    #assert (nargs == len(kwargs_))\n    return kwargs_\n",
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                            "content": "class nagen(object):\n    \"\"\"A helper to provide a desired missing value if no value is known\n\n    Usecases\n    - could be used as a generator for `defaultdict`\n    - since it returns itself upon getitem, should work even for complex\n      nested dictionaries/lists .format templates\n    \"\"\"\n    def __init__(self, missing=NA_STRING):\n        self.missing = missing\n\n    def __repr__(self):\n        cls = self.__class__.__name__\n        args = str(self.missing) if self.missing != NA_STRING else ''\n        return '%s(%s)' % (cls, args)\n\n    def __str__(self):\n        return self.missing\n\n    def __getitem__(self, *args):\n        return self\n\n    def __getattr__(self, item):\n        return self",
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                            "content": "class nagen(object):\n    \"\"\"A helper to provide a desired missing value if no value is known\n\n    Usecases\n    - could be used as a generator for `defaultdict`\n    - since it returns itself upon getitem, should work even for complex\n      nested dictionaries/lists .format templates\n    \"\"\"\n    def __init__(self, missing=NA_STRING):\n        self.missing = missing\n\n    def __repr__(self):\n        cls = self.__class__.__name__\n        args = str(self.missing) if self.missing != NA_STRING else ''\n        return '%s(%s)' % (cls, args)\n\n    def __str__(self):\n        return self.missing\n\n    def __getitem__(self, *args):\n        return self\n\n    def __getattr__(self, item):\n        return self",
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                                "content": "class nagen(object):\n    \"\"\"A helper to provide a desired missing value if no value is known\n\n    Usecases\n    - could be used as a generator for `defaultdict`\n    - since it returns itself upon getitem, should work even for complex\n      nested dictionaries/lists .format templates\n    \"\"\"\n    def __init__(self, missing=NA_STRING):\n        self.missing = missing\n\n    def __repr__(self):\n        cls = self.__class__.__name__\n        args = str(self.missing) if self.missing != NA_STRING else ''\n        return '%s(%s)' % (cls, args)\n\n    def __str__(self):\n        return self.missing\n\n    def __getitem__(self, *args):\n        return self\n\n    def __getattr__(self, item):\n        return self",
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        {
            "old_file_content": "# emacs: -*- mode: python; py-indent-offset: 4; tab-width: 4; indent-tabs-mode: nil -*-\n# ex: set sts=4 ts=4 sw=4 noet:\n# ## ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ##\n#\n#   See COPYING file distributed along with the datalad package for the\n#   copyright and license terms.\n#\n# ## ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ##\n\"\"\"test the holy grail of interfaces\n\n\"\"\"\n\nimport mock\nfrom datalad.tests.utils import *\nfrom datalad.utils import updated\nfrom ..base import Interface\nfrom argparse import Namespace\n\n\ndef _args(**kwargs):\n    return Namespace(\n        # ATM duplicates definitions done by cmdline.main and\n        # required by code logic to be defined. (should they?)\n        **updated(\n            dict(\n                common_output_format=\"default\"\n            ),\n            kwargs\n        )\n    )\n\n\ndef _new_args(**kwargs):\n    # A few more must be specified\n    return _args(\n        **updated(\n            dict(\n                common_on_failure=None,  # ['ignore', 'continue', 'stop']\n                common_report_status=None,  # ['all', 'success', 'failure', 'ok', 'notneeded', 'impossible', 'error']\n                common_report_type=None,  # ['dataset', 'file']\n                common_proc_pre=None,\n                common_proc_post=None,\n            ),\n            kwargs\n        )\n    )\n\n\ndef test_call_from_parser_old_style():\n    # test that old style commands are invoked without any additional arguments\n    class DummyOne(Interface):\n        @staticmethod\n        def __call__(arg=None):\n            eq_(arg, \"nothing\")\n            return \"magical\"\n    with mock.patch.object(Interface, '_OLDSTYLE_COMMANDS', ('DummyOne',)):\n        val = DummyOne.call_from_parser(_args(arg=\"nothing\"))\n        eq_(val, \"magical\")\n\n\ndef test_call_from_parser_old_style_generator():\n    # test that old style commands are invoked without any additional arguments\n    class DummyOne(Interface):\n        @staticmethod\n        def __call__(arg=None):\n            eq_(arg, \"nothing\")\n            yield \"nothing is\"\n            yield \"magical\"\n    with mock.patch.object(Interface, '_OLDSTYLE_COMMANDS', ('DummyOne',)):\n        val = DummyOne.call_from_parser(_args(arg=\"nothing\"))\n        eq_(val, [\"nothing is\", \"magical\"])\n\n\ndef test_call_from_parser_default_args():\n    class DummyOne(Interface):\n        # explicitly without @eval_results\n        @staticmethod\n        def __call__(arg=None, **kwargs):\n            eq_(kwargs['common_on_failure'], None)\n            eq_(kwargs['common_report_status'], None)\n            eq_(kwargs['common_report_type'], None)\n            # and even those we didn't pass\n            eq_(kwargs['common_output_format'], \"default\")\n            eq_(kwargs['return_type'], \"generator\")\n            eq_(arg, \"nothing\")\n            yield \"nothing is\"\n            yield \"magical\"\n\n    # just to be sure no evil spirits chase away our Dummy\n    with mock.patch.object(Interface, '_OLDSTYLE_COMMANDS', tuple()):\n        val = DummyOne.call_from_parser(_new_args(arg=\"nothing\"))\n        eq_(val, [\"nothing is\", \"magical\"])\n\n\ndef test_call_from_parser_result_filter():\n    class DummyOne(Interface):\n        @staticmethod\n        def __call__(**kwargs):\n            yield kwargs\n\n    with mock.patch.object(Interface, '_OLDSTYLE_COMMANDS', tuple()):\n        # call_from_parser doesn't add result_filter to the keyword arguments\n        # unless a CLI option sets it to a non-None value.\n        assert_not_in(\"result_filter\",\n                      DummyOne.call_from_parser(_new_args())[0])\n        assert_in(\"result_filter\",\n                  DummyOne.call_from_parser(\n                      _new_args(common_report_type=\"dataset\"))[0])\n\n\ndef test_get_result_filter_arg_vs_config():\n    # just tests that we would be obtaining the same constraints via\n    # cmdline argument or via config variable.  With cmdline overloading\n    # config\n    f = Interface._get_result_filter\n    eq_(f(_new_args()), None)  # by default, no filter\n\n    for v in \"success\", \"failure\", \"ok\", \"notneeded\", \"error\":\n        cargs = f(_new_args(common_report_status=v))\n        assert cargs is not None\n        with patch_config({\"datalad.runtime.report-status\": v}):\n            ccfg = f(_new_args())\n            ccfg_none = f(_new_args(common_report_status=\"all\"))\n        # cannot compare directly but at least could verify based on repr\n        print(\"%s -> %s\" % (v, repr(cargs)))\n        eq_(repr(cargs), repr(ccfg))\n        # and if 'all' - none filter\n        eq_(None, ccfg_none)\n\n        # and we overload the \"error\" in config\n        with patch_config({\"datalad.runtime.report-status\": \"error\"}):\n            cargs_overload = f(_new_args(common_report_status=v))\n        eq_(repr(cargs), repr(cargs_overload))\n",
            "new_file_content": "# emacs: -*- mode: python; py-indent-offset: 4; tab-width: 4; indent-tabs-mode: nil -*-\n# ex: set sts=4 ts=4 sw=4 noet:\n# ## ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ##\n#\n#   See COPYING file distributed along with the datalad package for the\n#   copyright and license terms.\n#\n# ## ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ##\n\"\"\"test the holy grail of interfaces\n\n\"\"\"\n\nimport mock\nfrom datalad.tests.utils import *\nfrom datalad.utils import updated\nfrom ..base import (\n    Interface,\n    nadict,\n    nagen,\n    NA_STRING,\n)\nfrom argparse import Namespace\n\n\ndef _args(**kwargs):\n    return Namespace(\n        # ATM duplicates definitions done by cmdline.main and\n        # required by code logic to be defined. (should they?)\n        **updated(\n            dict(\n                common_output_format=\"default\"\n            ),\n            kwargs\n        )\n    )\n\n\ndef _new_args(**kwargs):\n    # A few more must be specified\n    return _args(\n        **updated(\n            dict(\n                common_on_failure=None,  # ['ignore', 'continue', 'stop']\n                common_report_status=None,  # ['all', 'success', 'failure', 'ok', 'notneeded', 'impossible', 'error']\n                common_report_type=None,  # ['dataset', 'file']\n                common_proc_pre=None,\n                common_proc_post=None,\n            ),\n            kwargs\n        )\n    )\n\n\ndef test_call_from_parser_old_style():\n    # test that old style commands are invoked without any additional arguments\n    class DummyOne(Interface):\n        @staticmethod\n        def __call__(arg=None):\n            eq_(arg, \"nothing\")\n            return \"magical\"\n    with mock.patch.object(Interface, '_OLDSTYLE_COMMANDS', ('DummyOne',)):\n        val = DummyOne.call_from_parser(_args(arg=\"nothing\"))\n        eq_(val, \"magical\")\n\n\ndef test_call_from_parser_old_style_generator():\n    # test that old style commands are invoked without any additional arguments\n    class DummyOne(Interface):\n        @staticmethod\n        def __call__(arg=None):\n            eq_(arg, \"nothing\")\n            yield \"nothing is\"\n            yield \"magical\"\n    with mock.patch.object(Interface, '_OLDSTYLE_COMMANDS', ('DummyOne',)):\n        val = DummyOne.call_from_parser(_args(arg=\"nothing\"))\n        eq_(val, [\"nothing is\", \"magical\"])\n\n\ndef test_call_from_parser_default_args():\n    class DummyOne(Interface):\n        # explicitly without @eval_results\n        @staticmethod\n        def __call__(arg=None, **kwargs):\n            eq_(kwargs['common_on_failure'], None)\n            eq_(kwargs['common_report_status'], None)\n            eq_(kwargs['common_report_type'], None)\n            # and even those we didn't pass\n            eq_(kwargs['common_output_format'], \"default\")\n            eq_(kwargs['return_type'], \"generator\")\n            eq_(arg, \"nothing\")\n            yield \"nothing is\"\n            yield \"magical\"\n\n    # just to be sure no evil spirits chase away our Dummy\n    with mock.patch.object(Interface, '_OLDSTYLE_COMMANDS', tuple()):\n        val = DummyOne.call_from_parser(_new_args(arg=\"nothing\"))\n        eq_(val, [\"nothing is\", \"magical\"])\n\n\ndef test_call_from_parser_result_filter():\n    class DummyOne(Interface):\n        @staticmethod\n        def __call__(**kwargs):\n            yield kwargs\n\n    with mock.patch.object(Interface, '_OLDSTYLE_COMMANDS', tuple()):\n        # call_from_parser doesn't add result_filter to the keyword arguments\n        # unless a CLI option sets it to a non-None value.\n        assert_not_in(\"result_filter\",\n                      DummyOne.call_from_parser(_new_args())[0])\n        assert_in(\"result_filter\",\n                  DummyOne.call_from_parser(\n                      _new_args(common_report_type=\"dataset\"))[0])\n\n\ndef test_get_result_filter_arg_vs_config():\n    # just tests that we would be obtaining the same constraints via\n    # cmdline argument or via config variable.  With cmdline overloading\n    # config\n    f = Interface._get_result_filter\n    eq_(f(_new_args()), None)  # by default, no filter\n\n    for v in \"success\", \"failure\", \"ok\", \"notneeded\", \"error\":\n        cargs = f(_new_args(common_report_status=v))\n        assert cargs is not None\n        with patch_config({\"datalad.runtime.report-status\": v}):\n            ccfg = f(_new_args())\n            ccfg_none = f(_new_args(common_report_status=\"all\"))\n        # cannot compare directly but at least could verify based on repr\n        print(\"%s -> %s\" % (v, repr(cargs)))\n        eq_(repr(cargs), repr(ccfg))\n        # and if 'all' - none filter\n        eq_(None, ccfg_none)\n\n        # and we overload the \"error\" in config\n        with patch_config({\"datalad.runtime.report-status\": \"error\"}):\n            cargs_overload = f(_new_args(common_report_status=v))\n        eq_(repr(cargs), repr(cargs_overload))\n\n\ndef test_nagen():\n    na = nagen()\n    eq_(str(na), NA_STRING)\n    eq_(repr(na), 'nagen()')\n    assert na.unknown is na\n    assert na['unknown'] is na\n\n    eq_(str(nagen('-')), '-')\n\n\ndef test_nadict():\n    d = nadict({1: 2})\n    eq_(d[1], 2)\n    eq_(str(d[2]), NA_STRING)",
            "header": {
                "file": {
                    "path": "datalad/interface/tests/test_base.py"
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                "old_commit_hash": "4703cb5b3",
                "new_commit_hash": "3c7d2e97c",
                "mode": "100644"
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            "binary_line": null,
            "minus_file": {
                "path": "a/datalad/interface/tests/test_base.py"
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            "plus_file": {
                "path": "b/datalad/interface/tests/test_base.py"
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            "hunks": [
                {
                    "descriptor": {
                        "old_range": {
                            "start": 13,
                            "length": 7
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                        "new_range": {
                            "start": 13,
                            "length": 12
                        },
                        "section": ""
                    },
                    "line_group": {
                        "all_lines": [
                            {
                                "content": "import mock",
                                "type": "context"
                            },
                            {
                                "content": "from datalad.tests.utils import *",
                                "type": "context"
                            },
                            {
                                "content": "from datalad.utils import updated",
                                "type": "context"
                            },
                            {
                                "content": "from ..base import Interface",
                                "type": "deleted"
                            },
                            {
                                "content": "from ..base import (",
                                "type": "added"
                            },
                            {
                                "content": "    Interface,",
                                "type": "added"
                            },
                            {
                                "content": "    nadict,",
                                "type": "added"
                            },
                            {
                                "content": "    nagen,",
                                "type": "added"
                            },
                            {
                                "content": "    NA_STRING,",
                                "type": "added"
                            },
                            {
                                "content": ")",
                                "type": "added"
                            },
                            {
                                "content": "from argparse import Namespace",
                                "type": "context"
                            },
                            {
                                "content": "",
                                "type": "context"
                            },
                            {
                                "content": "",
                                "type": "context"
                            }
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                    },
                    "modified_entities": [],
                    "added_entities": [
                        {
                            "file_name": "datalad/interface/tests/test_base.py",
                            "type": "statement",
                            "name": "",
                            "content": "from ..base import (\n    Interface,\n    nadict,\n    nagen,\n    NA_STRING,\n)",
                            "ast_type_str": "ImportFrom",
                            "start_lineno": 16,
                            "end_lineno": 21,
                            "parent": null
                        }
                    ],
                    "deleted_entities": [
                        {
                            "file_name": "datalad/interface/tests/test_base.py",
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                            "name": "",
                            "content": "from ..base import Interface",
                            "ast_type_str": "ImportFrom",
                            "start_lineno": 16,
                            "end_lineno": 16,
                            "parent": null
                        }
                    ]
                },
                {
                    "descriptor": {
                        "old_range": {
                            "start": 131,
                            "length": 3
                        },
                        "new_range": {
                            "start": 136,
                            "length": 19
                        },
                        "section": "def test_get_result_filter_arg_vs_config():"
                    },
                    "line_group": {
                        "all_lines": [
                            {
                                "content": "        with patch_config({\"datalad.runtime.report-status\": \"error\"}):",
                                "type": "context"
                            },
                            {
                                "content": "            cargs_overload = f(_new_args(common_report_status=v))",
                                "type": "context"
                            },
                            {
                                "content": "        eq_(repr(cargs), repr(cargs_overload))",
                                "type": "context"
                            },
                            {
                                "content": "",
                                "type": "added"
                            },
                            {
                                "content": "",
                                "type": "added"
                            },
                            {
                                "content": "def test_nagen():",
                                "type": "added"
                            },
                            {
                                "content": "    na = nagen()",
                                "type": "added"
                            },
                            {
                                "content": "    eq_(str(na), NA_STRING)",
                                "type": "added"
                            },
                            {
                                "content": "    eq_(repr(na), 'nagen()')",
                                "type": "added"
                            },
                            {
                                "content": "    assert na.unknown is na",
                                "type": "added"
                            },
                            {
                                "content": "    assert na['unknown'] is na",
                                "type": "added"
                            },
                            {
                                "content": "",
                                "type": "added"
                            },
                            {
                                "content": "    eq_(str(nagen('-')), '-')",
                                "type": "added"
                            },
                            {
                                "content": "",
                                "type": "added"
                            },
                            {
                                "content": "",
                                "type": "added"
                            },
                            {
                                "content": "def test_nadict():",
                                "type": "added"
                            },
                            {
                                "content": "    d = nadict({1: 2})",
                                "type": "added"
                            },
                            {
                                "content": "    eq_(d[1], 2)",
                                "type": "added"
                            },
                            {
                                "content": "    eq_(str(d[2]), NA_STRING)",
                                "type": "added"
                            },
                            {
                                "content": "No newline at end of file",
                                "type": "note"
                            },
                            {
                                "content": "",
                                "type": "context"
                            }
                        ]
                    },
                    "modified_entities": [],
                    "added_entities": [
                        {
                            "file_name": "datalad/interface/tests/test_base.py",
                            "type": "function",
                            "name": "test_nadict",
                            "content": "def test_nadict():\n    d = nadict({1: 2})\n    eq_(d[1], 2)\n    eq_(str(d[2]), NA_STRING)",
                            "ast_type_str": "FunctionDef",
                            "start_lineno": 151,
                            "end_lineno": 154,
                            "parent": null
                        },
                        {
                            "file_name": "datalad/interface/tests/test_base.py",
                            "type": "function",
                            "name": "test_nagen",
                            "content": "def test_nagen():\n    na = nagen()\n    eq_(str(na), NA_STRING)\n    eq_(repr(na), 'nagen()')\n    assert na.unknown is na\n    assert na['unknown'] is na\n\n    eq_(str(nagen('-')), '-')",
                            "ast_type_str": "FunctionDef",
                            "start_lineno": 141,
                            "end_lineno": 148,
                            "parent": null
                        }
                    ],
                    "deleted_entities": []
                }
            ]
        }
    ],
    "old_commit_hash": "4969148f58c3a40ac05f33e714879a637d846aef^",
    "new_commit_hash": "4969148f58c3a40ac05f33e714879a637d846aef",
    "commit_message": "ENH(TST): very basic tests for na helpers",
    "commit_date": "2018-08-09T18:20:20-04:00",
    "metadata": {}
}
{
    "repo_name": "datalad",
    "new_commit_hash": "4969148f58c3a40ac05f33e714879a637d846aef",
    "test_file_codes": [
        "# emacs: -*- mode: python; py-indent-offset: 4; tab-width: 4; indent-tabs-mode: nil -*-\n# ex: set sts=4 ts=4 sw=4 noet:\n# ## ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ##\n#\n#   See COPYING file distributed along with the datalad package for the\n#   copyright and license terms.\n#\n# ## ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ##\n\"\"\"test the holy grail of interfaces\n\n\"\"\"\n\nimport mock\nfrom datalad.tests.utils import *\nfrom datalad.utils import updated\nfrom datalad.interface.base import (\n    Interface,\n    nadict,\n    nagen,\n    NA_STRING,\n)\nfrom argparse import Namespace\n\n\ndef _args(**kwargs):\n    return Namespace(\n        # ATM duplicates definitions done by cmdline.main and\n        # required by code logic to be defined. (should they?)\n        **updated(\n            dict(\n                common_output_format=\"default\"\n            ),\n            kwargs\n        )\n    )\n\n\ndef _new_args(**kwargs):\n    # A few more must be specified\n    return _args(\n        **updated(\n            dict(\n                common_on_failure=None,  # ['ignore', 'continue', 'stop']\n                common_report_status=None,  # ['all', 'success', 'failure', 'ok', 'notneeded', 'impossible', 'error']\n                common_report_type=None,  # ['dataset', 'file']\n                common_proc_pre=None,\n                common_proc_post=None,\n            ),\n            kwargs\n        )\n    )\n\n\ndef test_call_from_parser_old_style():\n    # test that old style commands are invoked without any additional arguments\n    class DummyOne(Interface):\n        @staticmethod\n        def __call__(arg=None):\n            eq_(arg, \"nothing\")\n            return \"magical\"\n    with mock.patch.object(Interface, '_OLDSTYLE_COMMANDS', ('DummyOne',)):\n        val = DummyOne.call_from_parser(_args(arg=\"nothing\"))\n        eq_(val, \"magical\")\n\n\ndef test_call_from_parser_old_style_generator():\n    # test that old style commands are invoked without any additional arguments\n    class DummyOne(Interface):\n        @staticmethod\n        def __call__(arg=None):\n            eq_(arg, \"nothing\")\n            yield \"nothing is\"\n            yield \"magical\"\n    with mock.patch.object(Interface, '_OLDSTYLE_COMMANDS', ('DummyOne',)):\n        val = DummyOne.call_from_parser(_args(arg=\"nothing\"))\n        eq_(val, [\"nothing is\", \"magical\"])\n\n\ndef test_call_from_parser_default_args():\n    class DummyOne(Interface):\n        # explicitly without @eval_results\n        @staticmethod\n        def __call__(arg=None, **kwargs):\n            eq_(kwargs['common_on_failure'], None)\n            eq_(kwargs['common_report_status'], None)\n            eq_(kwargs['common_report_type'], None)\n            # and even those we didn't pass\n            eq_(kwargs['common_output_format'], \"default\")\n            eq_(kwargs['return_type'], \"generator\")\n            eq_(arg, \"nothing\")\n            yield \"nothing is\"\n            yield \"magical\"\n\n    # just to be sure no evil spirits chase away our Dummy\n    with mock.patch.object(Interface, '_OLDSTYLE_COMMANDS', tuple()):\n        val = DummyOne.call_from_parser(_new_args(arg=\"nothing\"))\n        eq_(val, [\"nothing is\", \"magical\"])\n\n\ndef test_call_from_parser_result_filter():\n    class DummyOne(Interface):\n        @staticmethod\n        def __call__(**kwargs):\n            yield kwargs\n\n    with mock.patch.object(Interface, '_OLDSTYLE_COMMANDS', tuple()):\n        # call_from_parser doesn't add result_filter to the keyword arguments\n        # unless a CLI option sets it to a non-None value.\n        assert_not_in(\"result_filter\",\n                      DummyOne.call_from_parser(_new_args())[0])\n        assert_in(\"result_filter\",\n                  DummyOne.call_from_parser(\n                      _new_args(common_report_type=\"dataset\"))[0])\n\n\ndef test_get_result_filter_arg_vs_config():\n    # just tests that we would be obtaining the same constraints via\n    # cmdline argument or via config variable.  With cmdline overloading\n    # config\n    f = Interface._get_result_filter\n    eq_(f(_new_args()), None)  # by default, no filter\n\n    for v in \"success\", \"failure\", \"ok\", \"notneeded\", \"error\":\n        cargs = f(_new_args(common_report_status=v))\n        assert cargs is not None\n        with patch_config({\"datalad.runtime.report-status\": v}):\n            ccfg = f(_new_args())\n            ccfg_none = f(_new_args(common_report_status=\"all\"))\n        # cannot compare directly but at least could verify based on repr\n        print(\"%s -> %s\" % (v, repr(cargs)))\n        eq_(repr(cargs), repr(ccfg))\n        # and if 'all' - none filter\n        eq_(None, ccfg_none)\n\n        # and we overload the \"error\" in config\n        with patch_config({\"datalad.runtime.report-status\": \"error\"}):\n            cargs_overload = f(_new_args(common_report_status=v))\n        eq_(repr(cargs), repr(cargs_overload))\n\n\ndef test_nagen():\n    na = nagen()\n    eq_(str(na), NA_STRING)\n    eq_(repr(na), 'nagen()')\n    assert na.unknown is na\n    assert na['unknown'] is na\n\n    eq_(str(nagen('-')), '-')\n\n\ndef test_nadict():\n    d = nadict({1: 2})\n    eq_(d[1], 2)\n    eq_(str(d[2]), NA_STRING)",
        "import pytest\nimport tempfile\nimport os\n\n\n@pytest.fixture\ndef path():\n    with tempfile.TemporaryDirectory() as tmpdir:\n        yield tmpdir\n\n\n@pytest.fixture(autouse=True)\ndef setup_git_config():\n    with tempfile.TemporaryDirectory() as home:\n        old_home = os.environ.get(\"HOME\")\n        os.environ[\"HOME\"] = home\n        os.system('git config --global user.name \"DataLad Tester\"')\n        os.system('git config --global user.email \"test@example.com\"')\n        yield\n        if old_home:\n            os.environ[\"HOME\"] = old_home\n"
    ],
    "test_file_names": [
        "test_1.py",
        "conftest.py"
    ],
    "setup_res_code": 0,
    "setup_res_stdout": "Starting Datalad installation attempts...\nVerifying installation...\n❌ Verification failed\nPython 3.9 installation failed, trying Python 3.7...\nVerifying installation...\nDatalad version: 0.10.2.dev40\n✅ Installation successful!\nSuccessfully installed Datalad using Python 3.7\n",
    "setup_res_stderr": "Using CPython 3.9.21\nCreating virtual environment at: .venv\nActivate with: source .venv/bin/activate\nResolved 25 packages in 170ms\nInstalled 25 packages in 4.43s\n + coverage==7.6.10\n + docopt==0.6.2\n + exceptiongroup==1.2.2\n + grabbit==0.2.6\n + importlib-resources==6.4.5\n + iniconfig==2.0.0\n + nibabel==5.3.2\n + num2words==0.5.14\n + numpy==2.0.2\n + packaging==24.2\n + pandas==2.2.3\n + patsy==1.0.1\n + pluggy==1.5.0\n + pybids==0.6.5\n + pytest==8.3.4\n + pytest-cov==6.0.0\n + python-dateutil==2.9.0.post0\n + pytz==2024.2\n + scipy==1.13.1\n + setuptools==75.6.0\n + six==1.17.0\n + tomli==2.2.1\n + typing-extensions==4.12.2\n + tzdata==2024.2\n + zipp==3.21.0\nerror: The build backend returned an error\n  Caused by: Call to `setuptools.build_meta:__legacy__.build_editable` failed (exit status: 1)\n\n[stderr]\nTraceback (most recent call last):\n  File \"<string>\", line 14, in <module>\n  File \"/home/gcpuser/.cache/uv/builds-v0/.tmpsGuzJx/lib/python3.9/site-packages/setuptools/build_meta.py\", line 483, in get_requires_for_build_editable\n    return self.get_requires_for_build_wheel(config_settings)\n  File \"/home/gcpuser/.cache/uv/builds-v0/.tmpsGuzJx/lib/python3.9/site-packages/setuptools/build_meta.py\", line 334, in get_requires_for_build_wheel\n    return self._get_build_requires(config_settings, requirements=[])\n  File \"/home/gcpuser/.cache/uv/builds-v0/.tmpsGuzJx/lib/python3.9/site-packages/setuptools/build_meta.py\", line 304, in _get_build_requires\n    self.run_setup()\n  File \"/home/gcpuser/.cache/uv/builds-v0/.tmpsGuzJx/lib/python3.9/site-packages/setuptools/build_meta.py\", line 522, in run_setup\n    super().run_setup(setup_script=setup_script)\n  File \"/home/gcpuser/.cache/uv/builds-v0/.tmpsGuzJx/lib/python3.9/site-packages/setuptools/build_meta.py\", line 320, in run_setup\n    exec(code, locals())\n  File \"<string>\", line 50, in <module>\nAttributeError: module 'platform' has no attribute 'dist'\n\nhint: This usually indicates a problem with the package or the build environment.\nerror: The build backend returned an error\n  Caused by: Call to `setuptools.build_meta:__legacy__.build_editable` failed (exit status: 1)\n\n[stderr]\nTraceback (most recent call last):\n  File \"<string>\", line 14, in <module>\n  File \"/home/gcpuser/.cache/uv/builds-v0/.tmp1iLyDR/lib/python3.9/site-packages/setuptools/build_meta.py\", line 483, in get_requires_for_build_editable\n    return self.get_requires_for_build_wheel(config_settings)\n  File \"/home/gcpuser/.cache/uv/builds-v0/.tmp1iLyDR/lib/python3.9/site-packages/setuptools/build_meta.py\", line 334, in get_requires_for_build_wheel\n    return self._get_build_requires(config_settings, requirements=[])\n  File \"/home/gcpuser/.cache/uv/builds-v0/.tmp1iLyDR/lib/python3.9/site-packages/setuptools/build_meta.py\", line 304, in _get_build_requires\n    self.run_setup()\n  File \"/home/gcpuser/.cache/uv/builds-v0/.tmp1iLyDR/lib/python3.9/site-packages/setuptools/build_meta.py\", line 522, in run_setup\n    super().run_setup(setup_script=setup_script)\n  File \"/home/gcpuser/.cache/uv/builds-v0/.tmp1iLyDR/lib/python3.9/site-packages/setuptools/build_meta.py\", line 320, in run_setup\n    exec(code, locals())\n  File \"<string>\", line 50, in <module>\nAttributeError: module 'platform' has no attribute 'dist'\n\nhint: This usually indicates a problem with the package or the build environment.\nTraceback (most recent call last):\n  File \"<string>\", line 1, in <module>\n  File \"/home/gcpuser/buckets/local_repoeval_bucket/repos/datalad_4969148f58c3a40ac05f33e714879a637d846aef/datalad/__init__.py\", line 39, in <module>\n    from datalad.cmd import GitRunner\n  File \"/home/gcpuser/buckets/local_repoeval_bucket/repos/datalad_4969148f58c3a40ac05f33e714879a637d846aef/datalad/cmd.py\", line 28, in <module>\n    from .support import path as op\n  File \"/home/gcpuser/buckets/local_repoeval_bucket/repos/datalad_4969148f58c3a40ac05f33e714879a637d846aef/datalad/support/path.py\", line 18, in <module>\n    from ..utils import assure_bytes\n  File \"/home/gcpuser/buckets/local_repoeval_bucket/repos/datalad_4969148f58c3a40ac05f33e714879a637d846aef/datalad/utils.py\", line 25, in <module>\n    import wrapt\nModuleNotFoundError: No module named 'wrapt'\nUsing CPython 3.7.9\nCreating virtual environment at: .venv\nActivate with: source .venv/bin/activate\nResolved 26 packages in 196ms\nInstalled 26 packages in 3.58s\n + bids==0.0\n + coverage==7.2.7\n + docopt==0.6.2\n + exceptiongroup==1.2.2\n + fasteners==0.19\n + grabbit==0.2.6\n + importlib-metadata==6.7.0\n + iniconfig==2.0.0\n + nibabel==4.0.2\n + num2words==0.5.14\n + numpy==1.21.6\n + packaging==24.0\n + pandas==1.3.5\n + patsy==1.0.1\n + pluggy==1.2.0\n + pybids==0.6.5\n + pytest==7.4.4\n + pytest-cov==4.1.0\n + python-dateutil==2.9.0.post0\n + pytz==2024.2\n + scipy==1.7.3\n + setuptools==68.0.0\n + six==1.17.0\n + tomli==2.0.1\n + typing-extensions==4.7.1\n + zipp==3.15.0\nResolved 57 packages in 1.51s\nPrepared 1 package in 1.08s\nInstalled 50 packages in 89ms\n + appdirs==1.4.4\n + beautifulsoup4==4.12.3\n + boto==2.49.0\n + certifi==2024.12.14\n + cffi==1.15.1\n + chardet==5.2.0\n + charset-normalizer==3.4.1\n + cryptography==44.0.0\n + datalad==0.10.2 (from file:///home/gcpuser/buckets/local_repoeval_bucket/repos/datalad_4969148f58c3a40ac05f33e714879a637d846aef)\n + deprecated==1.2.15\n + exifread==3.0.0\n + gitdb==4.0.11\n + gitpython==3.1.43\n + httpretty==1.1.4\n + humanize==4.6.0\n + idna==3.10\n + importlib-resources==5.12.0\n + iso8601==2.1.0\n + jaraco-classes==3.2.3\n + jeepney==0.8.0\n + jsmin==3.0.1\n + keyring==24.1.1\n + keyrings-alt==4.2.0\n + mock==5.1.0\n + more-itertools==9.1.0\n + msgpack==1.0.5\n + multidict==6.0.5\n + mutagen==1.47.0\n + nose==1.3.7\n + patool==1.12\n + pillow==9.5.0\n + pycparser==2.21\n + pygithub==2.3.0\n + pyjwt==2.8.0\n + pynacl==1.5.0\n + pyperclip==1.9.0\n + python-xmp-toolkit==2.0.2\n + pyyaml==6.0.1\n + requests==2.31.0\n + requests-ftp==0.3.1\n + secretstorage==3.3.3\n + simplejson==3.19.3\n + smmap==5.0.1\n + soupsieve==2.4.1\n + tqdm==4.67.1\n + urllib3==2.0.7\n + vcrpy==4.3.0\n + whoosh==2.7.4\n + wrapt==1.16.0\n + yarl==1.9.4\nResolved 90 packages in 196ms\nInstalled 31 packages in 251ms\n + alabaster==0.7.13\n + asv==0.6.4\n + asv-runner==0.2.1\n + babel==2.14.0\n + build==1.1.1\n + distlib==0.3.9\n + docutils==0.19\n + filelock==3.12.2\n + imagesize==1.4.1\n + jinja2==3.1.5\n + json5==0.9.16\n + markupsafe==2.1.5\n + nose-timer==1.0.1\n + platformdirs==4.0.0\n + psutil==6.1.1\n + pygments==2.17.2\n + pympler==1.1\n + pypandoc==1.14\n + pyproject-hooks==1.2.0\n + snowballstemmer==2.2.0\n + sphinx==5.3.0\n + sphinx-rtd-theme==2.0.0\n + sphinxcontrib-applehelp==1.0.2\n + sphinxcontrib-devhelp==1.0.2\n + sphinxcontrib-htmlhelp==2.0.0\n + sphinxcontrib-jquery==4.1\n + sphinxcontrib-jsmath==1.0.1\n + sphinxcontrib-qthelp==1.0.3\n + sphinxcontrib-serializinghtml==1.1.5\n + tabulate==0.9.0\n + virtualenv==20.26.6\n",
    "new_commit_res_code": 0,
    "new_commit_res_stdout": "============================= test session starts ==============================\nplatform linux -- Python 3.7.9, pytest-7.4.4, pluggy-1.2.0\nrootdir: /home/gcpuser/buckets/local_repoeval_bucket/repos/datalad_4969148f58c3a40ac05f33e714879a637d846aef\nplugins: cov-4.1.0\ncollected 7 items\n\nr2e_tests/test_1.py .......                                              [100%]\n\n==================================== PASSES ====================================\n_____________________ test_get_result_filter_arg_vs_config _____________________\n----------------------------- Captured stdout call -----------------------------\nsuccess -> constraint:status:{ok, notneeded}\nfailure -> constraint:status:{impossible, error}\nok -> constraint:status:{ok}\nnotneeded -> constraint:status:{notneeded}\nerror -> constraint:status:{error}\n=========================== short test summary info ============================\nPASSED r2e_tests/test_1.py::test_call_from_parser_old_style\nPASSED r2e_tests/test_1.py::test_call_from_parser_old_style_generator\nPASSED r2e_tests/test_1.py::test_call_from_parser_default_args\nPASSED r2e_tests/test_1.py::test_call_from_parser_result_filter\nPASSED r2e_tests/test_1.py::test_get_result_filter_arg_vs_config\nPASSED r2e_tests/test_1.py::test_nagen\nPASSED r2e_tests/test_1.py::test_nadict\n============================== 7 passed in 0.66s ===============================\n",
    "new_commit_res_stderr": "",
    "old_commit_res_code": 1,
    "old_commit_res_stdout": "============================= test session starts ==============================\nplatform linux -- Python 3.7.9, pytest-7.4.4, pluggy-1.2.0\nrootdir: /home/gcpuser/buckets/local_repoeval_bucket/repos/datalad_4969148f58c3a40ac05f33e714879a637d846aef\nplugins: cov-4.1.0\ncollected 7 items\n\nr2e_tests/test_1.py .....F.                                              [100%]\n\n=================================== FAILURES ===================================\n__________________________________ test_nagen __________________________________\n\n    def test_nagen():\n        na = nagen()\n        eq_(str(na), NA_STRING)\n>       eq_(repr(na), 'nagen()')\n\nr2e_tests/test_1.py:144: \n_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ \n\na = '<datalad.interface.base.nagen object at 0x768817ca29d0>', b = 'nagen()'\nmsg = None\n\n    def eq_(a, b, msg=None):\n        \"\"\"Shorthand for 'assert a == b, \"%r != %r\" % (a, b)\n        \"\"\"\n        if not a == b:\n>           raise AssertionError(msg or \"%r != %r\" % (a, b))\nE           AssertionError: '<datalad.interface.base.nagen object at 0x768817ca29d0>' != 'nagen()'\n\n.venv/lib/python3.7/site-packages/nose/tools/trivial.py:29: AssertionError\n==================================== PASSES ====================================\n_____________________ test_get_result_filter_arg_vs_config _____________________\n----------------------------- Captured stdout call -----------------------------\nsuccess -> constraint:status:{ok, notneeded}\nfailure -> constraint:status:{impossible, error}\nok -> constraint:status:{ok}\nnotneeded -> constraint:status:{notneeded}\nerror -> constraint:status:{error}\n=========================== short test summary info ============================\nPASSED r2e_tests/test_1.py::test_call_from_parser_old_style\nPASSED r2e_tests/test_1.py::test_call_from_parser_old_style_generator\nPASSED r2e_tests/test_1.py::test_call_from_parser_default_args\nPASSED r2e_tests/test_1.py::test_call_from_parser_result_filter\nPASSED r2e_tests/test_1.py::test_get_result_filter_arg_vs_config\nPASSED r2e_tests/test_1.py::test_nadict\nFAILED r2e_tests/test_1.py::test_nagen - AssertionError: '<datalad.interface....\n========================= 1 failed, 6 passed in 0.58s ==========================\n",
    "old_commit_res_stderr": ""
}
datalad/interface/base.py datalad/interface/tests/test_base.py
We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
[ISSUE]
**Title:** Incorrect representation of `nagen` objects leads to failing tests

**Description:**
When creating an instance of the `nagen` class, its representation does not match the expected format. The `__repr__` method is not properly defined, resulting in the default object representation instead of the intended string. This discrepancy causes related tests to fail.

**Example Buggy Code:**
```python
na = nagen()
print(repr(na))
```

**Expected Behavior:**
The `repr` of a `nagen` object should return the string `'nagen()'`.

**Actual Behavior:**
The `repr` of a `nagen` object returns a default object representation like `'<datalad.interface.base.nagen object at 0x768817ca29d0>'`, which does not match the expected format.
[/ISSUE]
--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.

--- BEGIN FILE ---
```
### datalad/interface/base.py
# emacs: -*- mode: python; py-indent-offset: 4; tab-width: 4; indent-tabs-mode: nil -*-
# ex: set sts=4 ts=4 sw=4 noet:
# ## ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ##
#
#   See COPYING file distributed along with the datalad package for the
#   copyright and license terms.
#
# ## ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ##
"""High-level interface generation

"""

__docformat__ = 'restructuredtext'

import logging
lgr = logging.getLogger('datalad.interface.base')

import sys
import re
import textwrap
import inspect
import string
from collections import (
    defaultdict,
    OrderedDict,
)
from six import iteritems

from ..ui import ui
from ..dochelpers import exc_str

from datalad.interface.common_opts import eval_params
from datalad.interface.common_opts import eval_defaults
from datalad.support.constraints import EnsureKeyChoice
from datalad.distribution.dataset import Dataset
from datalad.distribution.dataset import resolve_path


default_logchannels = {
    '': 'debug',
    'ok': 'debug',
    'notneeded': 'debug',
    'impossible': 'warning',
    'error': 'error',
}


def get_api_name(intfspec):
    """Given an interface specification return an API name for it"""
    if len(intfspec) > 3:
        name = intfspec[3]
    else:
        name = intfspec[0].split('.')[-1]
    return name


def get_cmdline_command_name(intfspec):
    """Given an interface specification return a cmdline command name"""
    if len(intfspec) > 2:
        name = intfspec[2]
    else:
        name = intfspec[0].split('.')[-1].replace('_', '-')
    return name


def get_interface_groups():
    from .. import interface as _interfaces

    grps = []
    # auto detect all available interfaces and generate a function-based
    # API from them
    for _item in _interfaces.__dict__:
        if not _item.startswith('_group_'):
            continue
        grp_name = _item[7:]
        grp = getattr(_interfaces, _item)
        grps.append((grp_name,) + grp)
    return grps


def dedent_docstring(text):
    """Remove uniform indentation from a multiline docstring"""
    # Problem is that first line might often have no offset, so might
    # need to be ignored from dedent call
    if text is None:
        return None
    if not text.startswith(' '):
        lines = text.split('\n')
        if len(lines) == 1:
            # single line, no indentation, nothing to do
            return text
        text2 = '\n'.join(lines[1:])
        return lines[0] + "\n" + textwrap.dedent(text2)
    else:
        return textwrap.dedent(text)


def alter_interface_docs_for_api(docs):
    """Apply modifications to interface docstrings for Python API use."""
    # central place to alter the impression of docstrings,
    # like removing cmdline specific sections
    if not docs:
        return docs
    docs = dedent_docstring(docs)
    # clean cmdline sections
    docs = re.sub(
        '\|\| CMDLINE \>\>.*?\<\< CMDLINE \|\|',
        '',
        docs,
        flags=re.MULTILINE | re.DOTALL)
    # clean cmdline in-line bits
    docs = re.sub(
        '\[CMD:\s[^\[\]]*\sCMD\]',
        '',
        docs,
        flags=re.MULTILINE | re.DOTALL)
    docs = re.sub(
        '\[PY:\s([^\[\]]*)\sPY\]',
        lambda match: match.group(1),
        docs,
        flags=re.MULTILINE)
    docs = re.sub(
        '\|\| PYTHON \>\>(.*?)\<\< PYTHON \|\|',
        lambda match: match.group(1),
        docs,
        flags=re.MULTILINE | re.DOTALL)
    docs = re.sub(
        '\|\| REFLOW \>\>\n(.*?)\<\< REFLOW \|\|',
        lambda match: textwrap.fill(match.group(1)),
        docs,
        flags=re.MULTILINE | re.DOTALL)
    return docs


def alter_interface_docs_for_cmdline(docs):
    """Apply modifications to interface docstrings for cmdline doc use."""
    # central place to alter the impression of docstrings,
    # like removing Python API specific sections, and argument markup
    if not docs:
        return docs
    docs = dedent_docstring(docs)
    # clean cmdline sections
    docs = re.sub(
        '\|\| PYTHON \>\>.*?\<\< PYTHON \|\|',
        '',
        docs,
        flags=re.MULTILINE | re.DOTALL)
    # clean cmdline in-line bits
    docs = re.sub(
        '\[PY:\s[^\[\]]*\sPY\]',
        '',
        docs,
        flags=re.MULTILINE | re.DOTALL)
    docs = re.sub(
        '\[CMD:\s([^\[\]]*)\sCMD\]',
        lambda match: match.group(1),
        docs,
        flags=re.MULTILINE)
    docs = re.sub(
        '\|\| CMDLINE \>\>(.*?)\<\< CMDLINE \|\|',
        lambda match: match.group(1),
        docs,
        flags=re.MULTILINE | re.DOTALL)
    # remove :role:`...` RST markup for cmdline docs
    docs = re.sub(
        r':\S+:`[^`]*`[\\]*',
        lambda match: ':'.join(match.group(0).split(':')[2:]).strip('`\\'),
        docs,
        flags=re.MULTILINE | re.DOTALL)
    # remove None constraint. In general, `None` on the cmdline means don't
    # give option at all, but specifying `None` explicitly is practically
    # impossible
    docs = re.sub(
        ',\sor\svalue\smust\sbe\s`None`',
        '',
        docs,
        flags=re.MULTILINE | re.DOTALL)
    # capitalize variables and remove backticks to uniformize with
    # argparse output
    docs = re.sub(
        '`\S*`',
        lambda match: match.group(0).strip('`').upper(),
        docs)
    # clean up sphinx API refs
    docs = re.sub(
        '\~datalad\.api\.\S*',
        lambda match: "`{0}`".format(match.group(0)[13:]),
        docs)
    # Remove RST paragraph markup
    docs = re.sub(
        r'^.. \S+::',
        lambda match: match.group(0)[3:-2].upper(),
        docs,
        flags=re.MULTILINE)
    docs = re.sub(
        '\|\| REFLOW \>\>\n(.*?)\<\< REFLOW \|\|',
        lambda match: textwrap.fill(match.group(1)),
        docs,
        flags=re.MULTILINE | re.DOTALL)
    return docs


def is_api_arg(arg):
    """Return True if argument is our API argument or self or used for internal
    purposes
    """
    return arg != 'self' and not arg.startswith('_')


def update_docstring_with_parameters(func, params, prefix=None, suffix=None,
                                     add_args=None):
    """Generate a useful docstring from a parameter spec

    Amends any existing docstring of a callable with a textual
    description of its parameters. The Parameter spec needs to match
    the number and names of the callables arguments.
    """
    from inspect import getargspec
    # get the signature
    ndefaults = 0
    args, varargs, varkw, defaults = getargspec(func)
    if add_args:
        add_argnames = sorted(add_args.keys())
        args.extend(add_argnames)
        defaults = defaults + tuple(add_args[k] for k in add_argnames)
    if defaults is not None:
        ndefaults = len(defaults)
    # start documentation with what the callable brings with it
    doc = prefix if prefix else u''
    if len(args) > 1:
        if len(doc):
            doc += '\n'
        doc += "Parameters\n----------\n"
        for i, arg in enumerate(args):
            if not is_api_arg(arg):
                continue
            # we need a parameter spec for each argument
            if not arg in params:
                raise ValueError("function has argument '%s' not described as a parameter" % arg)
            param = params[arg]
            # validate the default -- to make sure that the parameter description is
            # somewhat OK
            defaults_idx = ndefaults - len(args) + i
            if defaults_idx >= 0:
                if param.constraints is not None:
                    param.constraints(defaults[defaults_idx])
            orig_docs = param._doc
            param._doc = alter_interface_docs_for_api(param._doc)
            doc += param.get_autodoc(
                arg,
                default=defaults[defaults_idx] if defaults_idx >= 0 else None,
                has_default=defaults_idx >= 0)
            param._doc = orig_docs
            doc += '\n'
    doc += suffix if suffix else u""
    # assign the amended docs
    func.__doc__ = doc
    return func


def build_doc(cls, **kwargs):
    """Decorator to build docstrings for datalad commands

    It's intended to decorate the class, the __call__-method of which is the
    actual command. It expects that __call__-method to be decorated by
    eval_results.

    Parameters
    ----------
    cls: Interface
      class defining a datalad command
    """

    # Note, that this is a class decorator, which is executed only once when the
    # class is imported. It builds the docstring for the class' __call__ method
    # and returns the original class.
    #
    # This is because a decorator for the actual function would not be able to
    # behave like this. To build the docstring we need to access the attribute
    # _params of the class. From within a function decorator we cannot do this
    # during import time, since the class is being built in this very moment and
    # is not yet available in the module. And if we do it from within the part
    # of a function decorator, that is executed when the function is called, we
    # would need to actually call the command once in order to build this
    # docstring.

    lgr.debug("Building doc for {}".format(cls))

    cls_doc = cls.__doc__
    if hasattr(cls, '_docs_'):
        # expand docs
        cls_doc = cls_doc.format(**cls._docs_)

    call_doc = None
    # suffix for update_docstring_with_parameters:
    if cls.__call__.__doc__:
        call_doc = cls.__call__.__doc__

    # build standard doc and insert eval_doc
    spec = getattr(cls, '_params_', dict())
    # get docs for eval_results parameters:
    spec.update(eval_params)

    update_docstring_with_parameters(
        cls.__call__, spec,
        prefix=alter_interface_docs_for_api(cls_doc),
        suffix=alter_interface_docs_for_api(call_doc),
        add_args=eval_defaults if not hasattr(cls, '_no_eval_results') else None
    )

    # return original
    return cls


NA_STRING = 'N/A'  # we might want to make it configurable via config


class nagen(object):
    """A helper to provide a desired missing value if no value is known

    Usecases
    - could be used as a generator for `defaultdict`
    - since it returns itself upon getitem, should work even for complex
      nested dictionaries/lists .format templates
    """
    def __init__(self, missing=NA_STRING):
        self.missing = missing

    def __str__(self):
        return self.missing

    def __getitem__(self, *args):
        return self

    def __getattr__(self, item):
        return self


def nadict(*items):
    """A generator of default dictionary with the default nagen"""
    dd = defaultdict(nagen)
    dd.update(*items)
    return dd


class DefaultOutputFormatter(string.Formatter):
    """A custom formatter for default output rendering using .format
    """
    # TODO: make missing configurable?
    def __init__(self, missing=nagen()):
        """
        Parameters
        ----------
        missing: string, optional
          What to output for the missing values
        """
        super(DefaultOutputFormatter, self).__init__()
        self.missing = missing

    def _d(self, msg, *args):
        # print("   HERE %s" % (msg % args))
        pass

    def get_value(self, key, args, kwds):
        assert not args
        self._d("get_value: %r %r %r", key, args, kwds)
        return kwds.get(key, self.missing)

    # def get_field(self, field_name, args, kwds):
    #     assert not args
    #     self._d("get_field: %r args=%r kwds=%r" % (field_name, args, kwds))
    #     try:
    #         out = string.Formatter.get_field(self, field_name, args, kwds)
    #     except Exception as exc:
    #         # TODO needs more than just a value
    #         return "!ERR %s" % exc


class DefaultOutputRenderer(object):
    """A default renderer for .format'ed output line
    """
    def __init__(self, format):
        self.format = format
        # We still need custom output formatter since at the "first level"
        # within .format template all items there is no `nadict`
        self.formatter = DefaultOutputFormatter()

    @classmethod
    def _dict_to_nadict(cls, v):
        """Traverse datastructure and replace any regular dict with nadict"""
        if isinstance(v, list):
            return [cls._dict_to_nadict(x) for x in v]
        elif isinstance(v, dict):
            return nadict((k, cls._dict_to_nadict(x)) for k, x in iteritems(v))
        else:
            return v

    def __call__(self, x, **kwargs):
        dd = nadict(
            (k, nadict({k_.replace(':', '#'): self._dict_to_nadict(v_)
                for k_, v_ in v.items()})
                if isinstance(v, dict) else v)
            for k, v in x.items()
        )

        msg = self.formatter.format(self.format, **dd)
        return ui.message(msg)


class Interface(object):
    """Base class for interface implementations"""

    # exit code to return if user-interrupted
    # if None, would just reraise the Exception, so if in --dbg
    # mode would fall into the debugger
    _interrupted_exit_code = 1

    _OLDSTYLE_COMMANDS = (
        'AddArchiveContent', 'CrawlInit', 'Crawl', 'CreateSiblingGithub',
        'CreateTestDataset', 'Export', 'Ls', 'SSHRun', 'Test')

    @classmethod
    def setup_parser(cls, parser):
        # XXX needs safety check for name collisions
        # XXX allow for parser kwargs customization
        parser_kwargs = {}
        from inspect import getargspec
        # get the signature
        ndefaults = 0
        args, varargs, varkw, defaults = getargspec(cls.__call__)
        if not defaults is None:
            ndefaults = len(defaults)
        for i, arg in enumerate(args):
            if not is_api_arg(arg):
                continue
            param = cls._params_[arg]
            defaults_idx = ndefaults - len(args) + i
            cmd_args = param.cmd_args
            if cmd_args is None:
                cmd_args = []
            if not len(cmd_args):
                if defaults_idx >= 0:
                    # dealing with a kwarg
                    template = '--%s'
                else:
                    # positional arg
                    template = '%s'
                # use parameter name as default argument name
                parser_args = (template % arg.replace('_', '-'),)
            else:
                parser_args = [c.replace('_', '-') for c in cmd_args]
            parser_kwargs = param.cmd_kwargs
            if defaults_idx >= 0:
                parser_kwargs['default'] = defaults[defaults_idx]
            help = alter_interface_docs_for_cmdline(param._doc)
            if help and help[-1] != '.':
                help += '.'
            if param.constraints is not None:
                parser_kwargs['type'] = param.constraints
                # include value constraint description and default
                # into the help string
                cdoc = alter_interface_docs_for_cmdline(
                    param.constraints.long_description())
                if cdoc[0] == '(' and cdoc[-1] == ')':
                    cdoc = cdoc[1:-1]
                help += '  Constraints: %s' % cdoc
            if defaults_idx >= 0:
                help += " [Default: %r]" % (defaults[defaults_idx],)
            # create the parameter, using the constraint instance for type
            # conversion
            parser.add_argument(*parser_args, help=help,
                                **parser_kwargs)

    @classmethod
    def call_from_parser(cls, args):
        # XXX needs safety check for name collisions
        from inspect import getargspec
        argspec = getargspec(cls.__call__)
        if argspec[2] is None:
            # no **kwargs in the call receiver, pull argnames from signature
            argnames = getargspec(cls.__call__)[0]
        else:
            # common options
            # XXX define or better get from elsewhere
            common_opts = ('change_path', 'common_debug', 'common_idebug', 'func',
                           'help', 'log_level', 'logger', 'pbs_runner',
                           'result_renderer', 'proc_pre', 'proc_post', 'subparser')
            argnames = [name for name in dir(args)
                        if not (name.startswith('_') or name in common_opts)]
        kwargs = {k: getattr(args, k) for k in argnames if is_api_arg(k)}
        # we are coming from the entry point, this is the toplevel command,
        # let it run like generator so we can act on partial results quicker
        # TODO remove following condition test when transition is complete and
        # run indented code unconditionally
        if cls.__name__ not in Interface._OLDSTYLE_COMMANDS:
            # set all common args explicitly  to override class defaults
            # that are tailored towards the the Python API
            kwargs['return_type'] = 'generator'
            kwargs['result_xfm'] = None
            # allow commands to override the default, unless something other than
            # default is requested
            kwargs['result_renderer'] = \
                args.common_output_format if args.common_output_format != 'default' \
                else getattr(cls, 'result_renderer', args.common_output_format)
            if '{' in args.common_output_format:
                # stupid hack, could and should become more powerful
                kwargs['result_renderer'] = DefaultOutputRenderer(args.common_output_format)

            if args.common_on_failure:
                kwargs['on_failure'] = args.common_on_failure
            # compose filter function from to be invented cmdline options
            res_filter = cls._get_result_filter(args)
            if res_filter is not None:
                # Don't add result_filter if it's None because then
                # eval_results can't distinguish between --report-{status,type}
                # not specified via the CLI and None passed via the Python API.
                kwargs['result_filter'] = res_filter
            kwargs['proc_pre'] = args.common_proc_pre
            kwargs['proc_post'] = args.common_proc_post
        try:
            ret = cls.__call__(**kwargs)
            if inspect.isgenerator(ret):
                ret = list(ret)
            if args.common_output_format == 'tailored' and \
                    hasattr(cls, 'custom_result_summary_renderer'):
                cls.custom_result_summary_renderer(ret)
            return ret
        except KeyboardInterrupt as exc:
            ui.error("\nInterrupted by user while doing magic: %s" % exc_str(exc))
            if cls._interrupted_exit_code is not None:
                sys.exit(cls._interrupted_exit_code)
            else:
                raise

    @classmethod
    def _get_result_filter(cls, args):
        from datalad import cfg
        result_filter = None
        if args.common_report_status or 'datalad.runtime.report-status' in cfg:
            report_status = args.common_report_status or \
                            cfg.obtain('datalad.runtime.report-status')
            if report_status == "all":
                pass  # no filter
            elif report_status == 'success':
                result_filter = EnsureKeyChoice('status', ('ok', 'notneeded'))
            elif report_status == 'failure':
                result_filter = EnsureKeyChoice('status',
                                                ('impossible', 'error'))
            else:
                result_filter = EnsureKeyChoice('status', (report_status,))
        if args.common_report_type:
            tfilt = EnsureKeyChoice('type', tuple(args.common_report_type))
            result_filter = result_filter & tfilt if result_filter else tfilt
        return result_filter

    @classmethod
    def get_refds_path(cls, dataset):
        """Return a resolved reference dataset path from a `dataset` argument"""
        # theoretically a dataset could come in as a relative path -> resolve
        if dataset is None:
            return dataset
        refds_path = dataset.path if isinstance(dataset, Dataset) \
            else Dataset(dataset).path
        if refds_path:
            refds_path = resolve_path(refds_path)
        return refds_path


def get_allargs_as_kwargs(call, args, kwargs):
    """Generate a kwargs dict from a call signature and *args, **kwargs

    Basically resolving the argnames for all positional arguments, and
    resolvin the defaults for all kwargs that are not given in a kwargs
    dict
    """
    from inspect import getargspec
    argspec = getargspec(call)
    defaults = argspec.defaults
    nargs = len(argspec.args)
    assert (nargs >= len(defaults))
    # map any args to their name
    argmap = list(zip(argspec.args[:len(args)], args))
    kwargs_ = OrderedDict(argmap)
    # map defaults of kwargs to their names (update below)
    for k, v in zip(argspec.args[-len(defaults):], defaults):
        if k not in kwargs_:
            kwargs_[k] = v
    # update with provided kwarg args
    kwargs_.update(kwargs)
    # XXX we cannot assert the following, because our own highlevel
    # API commands support more kwargs than what is discoverable
    # from their signature...
    #assert (nargs == len(kwargs_))
    return kwargs_

```
--- END FILE ---

Please first localize the bug based on the issue statement, and then generate *SEARCH/REPLACE* edits to fix the issue.

Every *SEARCH/REPLACE* edit must use this format:
1. The file path
2. The start of search block: <<<<<<< SEARCH
3. A contiguous chunk of lines to search for in the existing source code
4. The dividing line: =======
5. The lines to replace into the source code
6. The end of the replace block: >>>>>>> REPLACE

Here is an example:

```python
### mathweb/flask/app.py
<<<<<<< SEARCH
from flask import Flask
=======
import math
from flask import Flask
>>>>>>> REPLACE
```
</solution>

Please note that the *SEARCH/REPLACE* edit REQUIRES PROPER INDENTATION. If you would like to add the line '        print(x)', you must fully write that out, with all those spaces before the code!
Wrap each *SEARCH/REPLACE* edit in a code block as shown in the example above. If you have multiple *SEARCH/REPLACE* edits, use a separate code block for each one.
[ISSUE]
**Title:** Incorrect representation of `nagen` objects leads to failing tests

**Description:**
When creating an instance of the `nagen` class, its representation does not match the expected format. The `__repr__` method is not properly defined, resulting in the default object representation instead of the intended string. This discrepancy causes related tests to fail.

**Example Buggy Code:**
```python
na = nagen()
print(repr(na))
```

**Expected Behavior:**
The `repr` of a `nagen` object should return the string `'nagen()'`.

**Actual Behavior:**
The `repr` of a `nagen` object returns a default object representation like `'<datalad.interface.base.nagen object at 0x768817ca29d0>'`, which does not match the expected format.
[/ISSUE]
{
    "test_call_from_parser_old_style": "PASSED",
    "test_call_from_parser_old_style_generator": "PASSED",
    "test_call_from_parser_default_args": "PASSED",
    "test_call_from_parser_result_filter": "PASSED",
    "test_get_result_filter_arg_vs_config": "PASSED",
    "test_nagen": "PASSED",
    "test_nadict": "PASSED"
}
diff --git a/datalad/interface/base.py b/datalad/interface/base.py
index 25911de3d..dfd081db3 100644
--- a/datalad/interface/base.py
+++ b/datalad/interface/base.py
@@ -326,6 +326,11 @@ class nagen(object):
     def __init__(self, missing=NA_STRING):
         self.missing = missing
 
+    def __repr__(self):
+        cls = self.__class__.__name__
+        args = str(self.missing) if self.missing != NA_STRING else ''
+        return '%s(%s)' % (cls, args)
+
     def __str__(self):
         return self.missing
 

{"datalad/interface/base.py": "# emacs: -*- mode: python; py-indent-offset: 4; tab-width: 4; indent-tabs-mode: nil -*-\n# ex: set sts=4 ts=4 sw=4 noet:\n# ## ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ##\n#\n#   See COPYING file distributed along with the datalad package for the\n#   copyright and license terms.\n#\n# ## ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ##\n\"\"\"High-level interface generation\n\n\"\"\"\n\n__docformat__ = 'restructuredtext'\n\nimport logging\nlgr = logging.getLogger('datalad.interface.base')\n\nimport sys\nimport re\nimport textwrap\nimport inspect\nimport string\nfrom collections import (\n    defaultdict,\n    OrderedDict,\n)\nfrom six import iteritems\n\nfrom ..ui import ui\nfrom ..dochelpers import exc_str\n\nfrom datalad.interface.common_opts import eval_params\nfrom datalad.interface.common_opts import eval_defaults\nfrom datalad.support.constraints import EnsureKeyChoice\nfrom datalad.distribution.dataset import Dataset\nfrom datalad.distribution.dataset import resolve_path\n\n\ndefault_logchannels = {\n    '': 'debug',\n    'ok': 'debug',\n    'notneeded': 'debug',\n    'impossible': 'warning',\n    'error': 'error',\n}\n\n\ndef get_api_name(intfspec):\n    \"\"\"Given an interface specification return an API name for it\"\"\"\n    if len(intfspec) > 3:\n        name = intfspec[3]\n    else:\n        name = intfspec[0].split('.')[-1]\n    return name\n\n\ndef get_cmdline_command_name(intfspec):\n    \"\"\"Given an interface specification return a cmdline command name\"\"\"\n    if len(intfspec) > 2:\n        name = intfspec[2]\n    else:\n        name = intfspec[0].split('.')[-1].replace('_', '-')\n    return name\n\n\ndef get_interface_groups():\n    from .. import interface as _interfaces\n\n    grps = []\n    # auto detect all available interfaces and generate a function-based\n    # API from them\n    for _item in _interfaces.__dict__:\n        if not _item.startswith('_group_'):\n            continue\n        grp_name = _item[7:]\n        grp = getattr(_interfaces, _item)\n        grps.append((grp_name,) + grp)\n    return grps\n\n\ndef dedent_docstring(text):\n    \"\"\"Remove uniform indentation from a multiline docstring\"\"\"\n    # Problem is that first line might often have no offset, so might\n    # need to be ignored from dedent call\n    if text is None:\n        return None\n    if not text.startswith(' '):\n        lines = text.split('\\n')\n        if len(lines) == 1:\n            # single line, no indentation, nothing to do\n            return text\n        text2 = '\\n'.join(lines[1:])\n        return lines[0] + \"\\n\" + textwrap.dedent(text2)\n    else:\n        return textwrap.dedent(text)\n\n\ndef alter_interface_docs_for_api(docs):\n    \"\"\"Apply modifications to interface docstrings for Python API use.\"\"\"\n    # central place to alter the impression of docstrings,\n    # like removing cmdline specific sections\n    if not docs:\n        return docs\n    docs = dedent_docstring(docs)\n    # clean cmdline sections\n    docs = re.sub(\n        '\\|\\| CMDLINE \\>\\>.*?\\<\\< CMDLINE \\|\\|',\n        '',\n        docs,\n        flags=re.MULTILINE | re.DOTALL)\n    # clean cmdline in-line bits\n    docs = re.sub(\n        '\\[CMD:\\s[^\\[\\]]*\\sCMD\\]',\n        '',\n        docs,\n        flags=re.MULTILINE | re.DOTALL)\n    docs = re.sub(\n        '\\[PY:\\s([^\\[\\]]*)\\sPY\\]',\n        lambda match: match.group(1),\n        docs,\n        flags=re.MULTILINE)\n    docs = re.sub(\n        '\\|\\| PYTHON \\>\\>(.*?)\\<\\< PYTHON \\|\\|',\n        lambda match: match.group(1),\n        docs,\n        flags=re.MULTILINE | re.DOTALL)\n    docs = re.sub(\n        '\\|\\| REFLOW \\>\\>\\n(.*?)\\<\\< REFLOW \\|\\|',\n        lambda match: textwrap.fill(match.group(1)),\n        docs,\n        flags=re.MULTILINE | re.DOTALL)\n    return docs\n\n\ndef alter_interface_docs_for_cmdline(docs):\n    \"\"\"Apply modifications to interface docstrings for cmdline doc use.\"\"\"\n    # central place to alter the impression of docstrings,\n    # like removing Python API specific sections, and argument markup\n    if not docs:\n        return docs\n    docs = dedent_docstring(docs)\n    # clean cmdline sections\n    docs = re.sub(\n        '\\|\\| PYTHON \\>\\>.*?\\<\\< PYTHON \\|\\|',\n        '',\n        docs,\n        flags=re.MULTILINE | re.DOTALL)\n    # clean cmdline in-line bits\n    docs = re.sub(\n        '\\[PY:\\s[^\\[\\]]*\\sPY\\]',\n        '',\n        docs,\n        flags=re.MULTILINE | re.DOTALL)\n    docs = re.sub(\n        '\\[CMD:\\s([^\\[\\]]*)\\sCMD\\]',\n        lambda match: match.group(1),\n        docs,\n        flags=re.MULTILINE)\n    docs = re.sub(\n        '\\|\\| CMDLINE \\>\\>(.*?)\\<\\< CMDLINE \\|\\|',\n        lambda match: match.group(1),\n        docs,\n        flags=re.MULTILINE | re.DOTALL)\n    # remove :role:`...` RST markup for cmdline docs\n    docs = re.sub(\n        r':\\S+:`[^`]*`[\\\\]*',\n        lambda match: ':'.join(match.group(0).split(':')[2:]).strip('`\\\\'),\n        docs,\n        flags=re.MULTILINE | re.DOTALL)\n    # remove None constraint. In general, `None` on the cmdline means don't\n    # give option at all, but specifying `None` explicitly is practically\n    # impossible\n    docs = re.sub(\n        ',\\sor\\svalue\\smust\\sbe\\s`None`',\n        '',\n        docs,\n        flags=re.MULTILINE | re.DOTALL)\n    # capitalize variables and remove backticks to uniformize with\n    # argparse output\n    docs = re.sub(\n        '`\\S*`',\n        lambda match: match.group(0).strip('`').upper(),\n        docs)\n    # clean up sphinx API refs\n    docs = re.sub(\n        '\\~datalad\\.api\\.\\S*',\n        lambda match: \"`{0}`\".format(match.group(0)[13:]),\n        docs)\n    # Remove RST paragraph markup\n    docs = re.sub(\n        r'^.. \\S+::',\n        lambda match: match.group(0)[3:-2].upper(),\n        docs,\n        flags=re.MULTILINE)\n    docs = re.sub(\n        '\\|\\| REFLOW \\>\\>\\n(.*?)\\<\\< REFLOW \\|\\|',\n        lambda match: textwrap.fill(match.group(1)),\n        docs,\n        flags=re.MULTILINE | re.DOTALL)\n    return docs\n\n\ndef is_api_arg(arg):\n    \"\"\"Return True if argument is our API argument or self or used for internal\n    purposes\n    \"\"\"\n    return arg != 'self' and not arg.startswith('_')\n\n\ndef update_docstring_with_parameters(func, params, prefix=None, suffix=None,\n                                     add_args=None):\n    \"\"\"Generate a useful docstring from a parameter spec\n\n    Amends any existing docstring of a callable with a textual\n    description of its parameters. The Parameter spec needs to match\n    the number and names of the callables arguments.\n    \"\"\"\n    from inspect import getargspec\n    # get the signature\n    ndefaults = 0\n    args, varargs, varkw, defaults = getargspec(func)\n    if add_args:\n        add_argnames = sorted(add_args.keys())\n        args.extend(add_argnames)\n        defaults = defaults + tuple(add_args[k] for k in add_argnames)\n    if defaults is not None:\n        ndefaults = len(defaults)\n    # start documentation with what the callable brings with it\n    doc = prefix if prefix else u''\n    if len(args) > 1:\n        if len(doc):\n            doc += '\\n'\n        doc += \"Parameters\\n----------\\n\"\n        for i, arg in enumerate(args):\n            if not is_api_arg(arg):\n                continue\n            # we need a parameter spec for each argument\n            if not arg in params:\n                raise ValueError(\"function has argument '%s' not described as a parameter\" % arg)\n            param = params[arg]\n            # validate the default -- to make sure that the parameter description is\n            # somewhat OK\n            defaults_idx = ndefaults - len(args) + i\n            if defaults_idx >= 0:\n                if param.constraints is not None:\n                    param.constraints(defaults[defaults_idx])\n            orig_docs = param._doc\n            param._doc = alter_interface_docs_for_api(param._doc)\n            doc += param.get_autodoc(\n                arg,\n                default=defaults[defaults_idx] if defaults_idx >= 0 else None,\n                has_default=defaults_idx >= 0)\n            param._doc = orig_docs\n            doc += '\\n'\n    doc += suffix if suffix else u\"\"\n    # assign the amended docs\n    func.__doc__ = doc\n    return func\n\n\ndef build_doc(cls, **kwargs):\n    \"\"\"Decorator to build docstrings for datalad commands\n\n    It's intended to decorate the class, the __call__-method of which is the\n    actual command. It expects that __call__-method to be decorated by\n    eval_results.\n\n    Parameters\n    ----------\n    cls: Interface\n      class defining a datalad command\n    \"\"\"\n\n    # Note, that this is a class decorator, which is executed only once when the\n    # class is imported. It builds the docstring for the class' __call__ method\n    # and returns the original class.\n    #\n    # This is because a decorator for the actual function would not be able to\n    # behave like this. To build the docstring we need to access the attribute\n    # _params of the class. From within a function decorator we cannot do this\n    # during import time, since the class is being built in this very moment and\n    # is not yet available in the module. And if we do it from within the part\n    # of a function decorator, that is executed when the function is called, we\n    # would need to actually call the command once in order to build this\n    # docstring.\n\n    lgr.debug(\"Building doc for {}\".format(cls))\n\n    cls_doc = cls.__doc__\n    if hasattr(cls, '_docs_'):\n        # expand docs\n        cls_doc = cls_doc.format(**cls._docs_)\n\n    call_doc = None\n    # suffix for update_docstring_with_parameters:\n    if cls.__call__.__doc__:\n        call_doc = cls.__call__.__doc__\n\n    # build standard doc and insert eval_doc\n    spec = getattr(cls, '_params_', dict())\n    # get docs for eval_results parameters:\n    spec.update(eval_params)\n\n    update_docstring_with_parameters(\n        cls.__call__, spec,\n        prefix=alter_interface_docs_for_api(cls_doc),\n        suffix=alter_interface_docs_for_api(call_doc),\n        add_args=eval_defaults if not hasattr(cls, '_no_eval_results') else None\n    )\n\n    # return original\n    return cls\n\n\nNA_STRING = 'N/A'  # we might want to make it configurable via config\n\n\nclass nagen(object):\n    \"\"\"A helper to provide a desired missing value if no value is known\n\n    Usecases\n    - could be used as a generator for `defaultdict`\n    - since it returns itself upon getitem, should work even for complex\n      nested dictionaries/lists .format templates\n    \"\"\"\n    def __init__(self, missing=NA_STRING):\n        self.missing = missing\n\n    def __str__(self):\n        return self.missing\n\n    def __getitem__(self, *args):\n        return self\n\n    def __getattr__(self, item):\n        return self\n\n\ndef nadict(*items):\n    \"\"\"A generator of default dictionary with the default nagen\"\"\"\n    dd = defaultdict(nagen)\n    dd.update(*items)\n    return dd\n\n\nclass DefaultOutputFormatter(string.Formatter):\n    \"\"\"A custom formatter for default output rendering using .format\n    \"\"\"\n    # TODO: make missing configurable?\n    def __init__(self, missing=nagen()):\n        \"\"\"\n        Parameters\n        ----------\n        missing: string, optional\n          What to output for the missing values\n        \"\"\"\n        super(DefaultOutputFormatter, self).__init__()\n        self.missing = missing\n\n    def _d(self, msg, *args):\n        # print(\"   HERE %s\" % (msg % args))\n        pass\n\n    def get_value(self, key, args, kwds):\n        assert not args\n        self._d(\"get_value: %r %r %r\", key, args, kwds)\n        return kwds.get(key, self.missing)\n\n    # def get_field(self, field_name, args, kwds):\n    #     assert not args\n    #     self._d(\"get_field: %r args=%r kwds=%r\" % (field_name, args, kwds))\n    #     try:\n    #         out = string.Formatter.get_field(self, field_name, args, kwds)\n    #     except Exception as exc:\n    #         # TODO needs more than just a value\n    #         return \"!ERR %s\" % exc\n\n\nclass DefaultOutputRenderer(object):\n    \"\"\"A default renderer for .format'ed output line\n    \"\"\"\n    def __init__(self, format):\n        self.format = format\n        # We still need custom output formatter since at the \"first level\"\n        # within .format template all items there is no `nadict`\n        self.formatter = DefaultOutputFormatter()\n\n    @classmethod\n    def _dict_to_nadict(cls, v):\n        \"\"\"Traverse datastructure and replace any regular dict with nadict\"\"\"\n        if isinstance(v, list):\n            return [cls._dict_to_nadict(x) for x in v]\n        elif isinstance(v, dict):\n            return nadict((k, cls._dict_to_nadict(x)) for k, x in iteritems(v))\n        else:\n            return v\n\n    def __call__(self, x, **kwargs):\n        dd = nadict(\n            (k, nadict({k_.replace(':', '#'): self._dict_to_nadict(v_)\n                for k_, v_ in v.items()})\n                if isinstance(v, dict) else v)\n            for k, v in x.items()\n        )\n\n        msg = self.formatter.format(self.format, **dd)\n        return ui.message(msg)\n\n\nclass Interface(object):\n    \"\"\"Base class for interface implementations\"\"\"\n\n    # exit code to return if user-interrupted\n    # if None, would just reraise the Exception, so if in --dbg\n    # mode would fall into the debugger\n    _interrupted_exit_code = 1\n\n    _OLDSTYLE_COMMANDS = (\n        'AddArchiveContent', 'CrawlInit', 'Crawl', 'CreateSiblingGithub',\n        'CreateTestDataset', 'Export', 'Ls', 'SSHRun', 'Test')\n\n    @classmethod\n    def setup_parser(cls, parser):\n        # XXX needs safety check for name collisions\n        # XXX allow for parser kwargs customization\n        parser_kwargs = {}\n        from inspect import getargspec\n        # get the signature\n        ndefaults = 0\n        args, varargs, varkw, defaults = getargspec(cls.__call__)\n        if not defaults is None:\n            ndefaults = len(defaults)\n        for i, arg in enumerate(args):\n            if not is_api_arg(arg):\n                continue\n            param = cls._params_[arg]\n            defaults_idx = ndefaults - len(args) + i\n            cmd_args = param.cmd_args\n            if cmd_args is None:\n                cmd_args = []\n            if not len(cmd_args):\n                if defaults_idx >= 0:\n                    # dealing with a kwarg\n                    template = '--%s'\n                else:\n                    # positional arg\n                    template = '%s'\n                # use parameter name as default argument name\n                parser_args = (template % arg.replace('_', '-'),)\n            else:\n                parser_args = [c.replace('_', '-') for c in cmd_args]\n            parser_kwargs = param.cmd_kwargs\n            if defaults_idx >= 0:\n                parser_kwargs['default'] = defaults[defaults_idx]\n            help = alter_interface_docs_for_cmdline(param._doc)\n            if help and help[-1] != '.':\n                help += '.'\n            if param.constraints is not None:\n                parser_kwargs['type'] = param.constraints\n                # include value constraint description and default\n                # into the help string\n                cdoc = alter_interface_docs_for_cmdline(\n                    param.constraints.long_description())\n                if cdoc[0] == '(' and cdoc[-1] == ')':\n                    cdoc = cdoc[1:-1]\n                help += '  Constraints: %s' % cdoc\n            if defaults_idx >= 0:\n                help += \" [Default: %r]\" % (defaults[defaults_idx],)\n            # create the parameter, using the constraint instance for type\n            # conversion\n            parser.add_argument(*parser_args, help=help,\n                                **parser_kwargs)\n\n    @classmethod\n    def call_from_parser(cls, args):\n        # XXX needs safety check for name collisions\n        from inspect import getargspec\n        argspec = getargspec(cls.__call__)\n        if argspec[2] is None:\n            # no **kwargs in the call receiver, pull argnames from signature\n            argnames = getargspec(cls.__call__)[0]\n        else:\n            # common options\n            # XXX define or better get from elsewhere\n            common_opts = ('change_path', 'common_debug', 'common_idebug', 'func',\n                           'help', 'log_level', 'logger', 'pbs_runner',\n                           'result_renderer', 'proc_pre', 'proc_post', 'subparser')\n            argnames = [name for name in dir(args)\n                        if not (name.startswith('_') or name in common_opts)]\n        kwargs = {k: getattr(args, k) for k in argnames if is_api_arg(k)}\n        # we are coming from the entry point, this is the toplevel command,\n        # let it run like generator so we can act on partial results quicker\n        # TODO remove following condition test when transition is complete and\n        # run indented code unconditionally\n        if cls.__name__ not in Interface._OLDSTYLE_COMMANDS:\n            # set all common args explicitly  to override class defaults\n            # that are tailored towards the the Python API\n            kwargs['return_type'] = 'generator'\n            kwargs['result_xfm'] = None\n            # allow commands to override the default, unless something other than\n            # default is requested\n            kwargs['result_renderer'] = \\\n                args.common_output_format if args.common_output_format != 'default' \\\n                else getattr(cls, 'result_renderer', args.common_output_format)\n            if '{' in args.common_output_format:\n                # stupid hack, could and should become more powerful\n                kwargs['result_renderer'] = DefaultOutputRenderer(args.common_output_format)\n\n            if args.common_on_failure:\n                kwargs['on_failure'] = args.common_on_failure\n            # compose filter function from to be invented cmdline options\n            res_filter = cls._get_result_filter(args)\n            if res_filter is not None:\n                # Don't add result_filter if it's None because then\n                # eval_results can't distinguish between --report-{status,type}\n                # not specified via the CLI and None passed via the Python API.\n                kwargs['result_filter'] = res_filter\n            kwargs['proc_pre'] = args.common_proc_pre\n            kwargs['proc_post'] = args.common_proc_post\n        try:\n            ret = cls.__call__(**kwargs)\n            if inspect.isgenerator(ret):\n                ret = list(ret)\n            if args.common_output_format == 'tailored' and \\\n                    hasattr(cls, 'custom_result_summary_renderer'):\n                cls.custom_result_summary_renderer(ret)\n            return ret\n        except KeyboardInterrupt as exc:\n            ui.error(\"\\nInterrupted by user while doing magic: %s\" % exc_str(exc))\n            if cls._interrupted_exit_code is not None:\n                sys.exit(cls._interrupted_exit_code)\n            else:\n                raise\n\n    @classmethod\n    def _get_result_filter(cls, args):\n        from datalad import cfg\n        result_filter = None\n        if args.common_report_status or 'datalad.runtime.report-status' in cfg:\n            report_status = args.common_report_status or \\\n                            cfg.obtain('datalad.runtime.report-status')\n            if report_status == \"all\":\n                pass  # no filter\n            elif report_status == 'success':\n                result_filter = EnsureKeyChoice('status', ('ok', 'notneeded'))\n            elif report_status == 'failure':\n                result_filter = EnsureKeyChoice('status',\n                                                ('impossible', 'error'))\n            else:\n                result_filter = EnsureKeyChoice('status', (report_status,))\n        if args.common_report_type:\n            tfilt = EnsureKeyChoice('type', tuple(args.common_report_type))\n            result_filter = result_filter & tfilt if result_filter else tfilt\n        return result_filter\n\n    @classmethod\n    def get_refds_path(cls, dataset):\n        \"\"\"Return a resolved reference dataset path from a `dataset` argument\"\"\"\n        # theoretically a dataset could come in as a relative path -> resolve\n        if dataset is None:\n            return dataset\n        refds_path = dataset.path if isinstance(dataset, Dataset) \\\n            else Dataset(dataset).path\n        if refds_path:\n            refds_path = resolve_path(refds_path)\n        return refds_path\n\n\ndef get_allargs_as_kwargs(call, args, kwargs):\n    \"\"\"Generate a kwargs dict from a call signature and *args, **kwargs\n\n    Basically resolving the argnames for all positional arguments, and\n    resolvin the defaults for all kwargs that are not given in a kwargs\n    dict\n    \"\"\"\n    from inspect import getargspec\n    argspec = getargspec(call)\n    defaults = argspec.defaults\n    nargs = len(argspec.args)\n    assert (nargs >= len(defaults))\n    # map any args to their name\n    argmap = list(zip(argspec.args[:len(args)], args))\n    kwargs_ = OrderedDict(argmap)\n    # map defaults of kwargs to their names (update below)\n    for k, v in zip(argspec.args[-len(defaults):], defaults):\n        if k not in kwargs_:\n            kwargs_[k] = v\n    # update with provided kwarg args\n    kwargs_.update(kwargs)\n    # XXX we cannot assert the following, because our own highlevel\n    # API commands support more kwargs than what is discoverable\n    # from their signature...\n    #assert (nargs == len(kwargs_))\n    return kwargs_\n"}
A user will ask you to solve a task. You should first draft your thinking process (inner monologue). Then, generate the solution.

Your response format must follow the template below:
<think>
Your thoughts or/and draft, like working through an exercise on scratch paper. Be as casual and as long as you want until you are confident to generate a correct solution.
</think>
<solution>
Final solution presented to the user.
</solution>
system
We are currently solving the following issue within our repository. Here is the issue text:
--- BEGIN ISSUE ---
[ISSUE]
**Title:** Incorrect representation of `nagen` objects leads to failing tests

**Description:**
When creating an instance of the `nagen` class, its representation does not match the expected format. The `__repr__` method is not properly defined, resulting in the default object representation instead of the intended string. This discrepancy causes related tests to fail.

**Example Buggy Code:**
```python
na = nagen()
print(repr(na))
```

**Expected Behavior:**
The `repr` of a `nagen` object should return the string `'nagen()'`.

**Actual Behavior:**
The `repr` of a `nagen` object returns a default object representation like `'<datalad.interface.base.nagen object at 0x768817ca29d0>'`, which does not match the expected format.
[/ISSUE]
--- END ISSUE ---

Below are some code segments, each from a relevant file. One or more of these files may contain bugs.

--- BEGIN FILE ---
```
### datalad/interface/base.py
# emacs: -*- mode: python; py-indent-offset: 4; tab-width: 4; indent-tabs-mode: nil -*-
# ex: set sts=4 ts=4 sw=4 noet:
# ## ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ##
#
#   See COPYING file distributed along with the datalad package for the
#   copyright and license terms.
#
# ## ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ### ##
"""High-level interface generation

"""

__docformat__ = 'restructuredtext'

import logging
lgr = logging.getLogger('datalad.interface.base')

import sys
import re
import textwrap
import inspect
import string
from collections import (
    defaultdict,
    OrderedDict,
)
from six import iteritems

from ..ui import ui
from ..dochelpers import exc_str

from datalad.interface.common_opts import eval_params
from datalad.interface.common_opts import eval_defaults
from datalad.support.constraints import EnsureKeyChoice
from datalad.distribution.dataset import Dataset
from datalad.distribution.dataset import resolve_path


default_logchannels = {
    '': 'debug',
    'ok': 'debug',
    'notneeded': 'debug',
    'impossible': 'warning',
    'error': 'error',
}


def get_api_name(intfspec):
    """Given an interface specification return an API name for it"""
    if len(intfspec) > 3:
        name = intfspec[3]
    else:
        name = intfspec[0].split('.')[-1]
    return name


def get_cmdline_command_name(intfspec):
    """Given an interface specification return a cmdline command name"""
    if len(intfspec) > 2:
        name = intfspec[2]
    else:
        name = intfspec[0].split('.')[-1].replace('_', '-')
    return name


def get_interface_groups():
    from .. import interface as _interfaces

    grps = []
    # auto detect all available interfaces and generate a function-based
    # API from them
    for _item in _interfaces.__dict__:
        if not _item.startswith('_group_'):
            continue
        grp_name = _item[7:]
        grp = getattr(_interfaces, _item)
        grps.append((grp_name,) + grp)
    return grps


def dedent_docstring(text):
    """Remove uniform indentation from a multiline docstring"""
    # Problem is that first line might often have no offset, so might
    # need to be ignored from dedent call
    if text is None:
        return None
    if not text.startswith(' '):
        lines = text.split('\n')
        if len(lines) == 1:
            # single line, no indentation, nothing to do
            return text
        text2 = '\n'.join(lines[1:])
        return lines[0] + "\n" + textwrap.dedent(text2)
    else:
        return textwrap.dedent(text)


def alter_interface_docs_for_api(docs):
    """Apply modifications to interface docstrings for Python API use."""
    # central place to alter the impression of docstrings,
    # like removing cmdline specific sections
    if not docs:
        return docs
    docs = dedent_docstring(docs)
    # clean cmdline sections
    docs = re.sub(
        '\|\| CMDLINE \>\>.*?\<\< CMDLINE \|\|',
        '',
        docs,
        flags=re.MULTILINE | re.DOTALL)
    # clean cmdline in-line bits
    docs = re.sub(
        '\[CMD:\s[^\[\]]*\sCMD\]',
        '',
        docs,
        flags=re.MULTILINE | re.DOTALL)
    docs = re.sub(
        '\[PY:\s([^\[\]]*)\sPY\]',
        lambda match: match.group(1),
        docs,
        flags=re.MULTILINE)
    docs = re.sub(
        '\|\| PYTHON \>\>(.*?)\<\< PYTHON \|\|',
        lambda match: match.group(1),
        docs,
        flags=re.MULTILINE | re.DOTALL)
    docs = re.sub(
        '\|\| REFLOW \>\>\n(.*?)\<\< REFLOW \|\|',
        lambda match: textwrap.fill(match.group(1)),
        docs,
        flags=re.MULTILINE | re.DOTALL)
    return docs


def alter_interface_docs_for_cmdline(docs):
    """Apply modifications to interface docstrings for cmdline doc use."""
    # central place to alter the impression of docstrings,
    # like removing Python API specific sections, and argument markup
    if not docs:
        return docs
    docs = dedent_docstring(docs)
    # clean cmdline sections
    docs = re.sub(
        '\|\| PYTHON \>\>.*?\<\< PYTHON \|\|',
        '',
        docs,
        flags=re.MULTILINE | re.DOTALL)
    # clean cmdline in-line bits
    docs = re.sub(
        '\[PY:\s[^\[\]]*\sPY\]',
        '',
        docs,
        flags=re.MULTILINE | re.DOTALL)
    docs = re.sub(
        '\[CMD:\s([^\[\]]*)\sCMD\]',
        lambda match: match.group(1),
        docs,
        flags=re.MULTILINE)
    docs = re.sub(
        '\|\| CMDLINE \>\>(.*?)\<\< CMDLINE \|\|',
        lambda match: match.group(1),
        docs,
        flags=re.MULTILINE | re.DOTALL)
    # remove :role:`...` RST markup for cmdline docs
    docs = re.sub(
        r':\S+:`[^`]*`[\\]*',
        lambda match: ':'.join(match.group(0).split(':')[2:]).strip('`\\'),
        docs,
        flags=re.MULTILINE | re.DOTALL)
    # remove None constraint. In general, `None` on the cmdline means don't
    # give option at all, but specifying `None` explicitly is practically
    # impossible
    docs = re.sub(
        ',\sor\svalue\smust\sbe\s`None`',
        '',
        docs,
        flags=re.MULTILINE | re.DOTALL)
    # capitalize variables and remove backticks to uniformize with
    # argparse output
    docs = re.sub(
        '`\S*`',
        lambda match: match.group(0).strip('`').upper(),
        docs)
    # clean up sphinx API refs
    docs = re.sub(
        '\~datalad\.api\.\S*',
        lambda match: "`{0}`".format(match.group(0)[13:]),
        docs)
    # Remove RST paragraph markup
    docs = re.sub(
        r'^.. \S+::',
        lambda match: match.group(0)[3:-2].upper(),
        docs,
        flags=re.MULTILINE)
    docs = re.sub(
        '\|\| REFLOW \>\>\n(.*?)\<\< REFLOW \|\|',
        lambda match: textwrap.fill(match.group(1)),
        docs,
        flags=re.MULTILINE | re.DOTALL)
    return docs


def is_api_arg(arg):
    """Return True if argument is our API argument or self or used for internal
    purposes
    """
    return arg != 'self' and not arg.startswith('_')


def update_docstring_with_parameters(func, params, prefix=None, suffix=None,
                                     add_args=None):
    """Generate a useful docstring from a parameter spec

    Amends any existing docstring of a callable with a textual
    description of its parameters. The Parameter spec needs to match
    the number and names of the callables arguments.
    """
    from inspect import getargspec
    # get the signature
    ndefaults = 0
    args, varargs, varkw, defaults = getargspec(func)
    if add_args:
        add_argnames = sorted(add_args.keys())
        args.extend(add_argnames)
        defaults = defaults + tuple(add_args[k] for k in add_argnames)
    if defaults is not None:
        ndefaults = len(defaults)
    # start documentation with what the callable brings with it
    doc = prefix if prefix else u''
    if len(args) > 1:
        if len(doc):
            doc += '\n'
        doc += "Parameters\n----------\n"
        for i, arg in enumerate(args):
            if not is_api_arg(arg):
                continue
            # we need a parameter spec for each argument
            if not arg in params:
                raise ValueError("function has argument '%s' not described as a parameter" % arg)
            param = params[arg]
            # validate the default -- to make sure that the parameter description is
            # somewhat OK
            defaults_idx = ndefaults - len(args) + i
            if defaults_idx >= 0:
                if param.constraints is not None:
                    param.constraints(defaults[defaults_idx])
            orig_docs = param._doc
            param._doc = alter_interface_docs_for_api(param._doc)
            doc += param.get_autodoc(
                arg,
                default=defaults[defaults_idx] if defaults_idx >= 0 else None,
                has_default=defaults_idx >= 0)
            param._doc = orig_docs
            doc += '\n'
    doc += suffix if suffix else u""
    # assign the amended docs
    func.__doc__ = doc
    return func


def build_doc(cls, **kwargs):
    """Decorator to build docstrings for datalad commands

    It's intended to decorate the class, the __call__-method of which is the
    actual command. It expects that __call__-method to be decorated by
    eval_results.

    Parameters
    ----------
    cls: Interface
      class defining a datalad command
    """

    # Note, that this is a class decorator, which is executed only once when the
    # class is imported. It builds the docstring for the class' __call__ method
    # and returns the original class.
    #
    # This is because a decorator for the actual function would not be able to
    # behave like this. To build the docstring we need to access the attribute
    # _params of the class. From within a function decorator we cannot do this
    # during import time, since the class is being built in this very moment and
    # is not yet available in the module. And if we do it from within the part
    # of a function decorator, that is executed when the function is called, we
    # would need to actually call the command once in order to build this
    # docstring.

    lgr.debug("Building doc for {}".format(cls))

    cls_doc = cls.__doc__
    if hasattr(cls, '_docs_'):
        # expand docs
        cls_doc = cls_doc.format(**cls._docs_)

    call_doc = None
    # suffix for update_docstring_with_parameters:
    if cls.__call__.__doc__:
        call_doc = cls.__call__.__doc__

    # build standard doc and insert eval_doc
    spec = getattr(cls, '_params_', dict())
    # get docs for eval_results parameters:
    spec.update(eval_params)

    update_docstring_with_parameters(
        cls.__call__, spec,
        prefix=alter_interface_docs_for_api(cls_doc),
        suffix=alter_interface_docs_for_api(call_doc),
        add_args=eval_defaults if not hasattr(cls, '_no_eval_results') else None
    )

    # return original
    return cls


NA_STRING = 'N/A'  # we might want to make it configurable via config


class nagen(object):
    """A helper to provide a desired missing value if no value is known

    Usecases
    - could be used as a generator for `defaultdict`
    - since it returns itself upon getitem, should work even for complex
      nested dictionaries/lists .format templates
    """
    def __init__(self, missing=NA_STRING):
        self.missing = missing

    def __str__(self):
        return self.missing

    def __getitem__(self, *args):
        return self

    def __getattr__(self, item):
        return self


def nadict(*items):
    """A generator of default dictionary with the default nagen"""
    dd = defaultdict(nagen)
    dd.update(*items)
    return dd


class DefaultOutputFormatter(string.Formatter):
    """A custom formatter for default output rendering using .format
    """
    # TODO: make missing configurable?
    def __init__(self, missing=nagen()):
        """
        Parameters
        ----------
        missing: string, optional
          What to output for the missing values
        """
        super(DefaultOutputFormatter, self).__init__()
        self.missing = missing

    def _d(self, msg, *args):
        # print("   HERE %s" % (msg % args))
        pass

    def get_value(self, key, args, kwds):
        assert not args
        self._d("get_value: %r %r %r", key, args, kwds)
        return kwds.get(key, self.missing)

    # def get_field(self, field_name, args, kwds):
    #     assert not args
    #     self._d("get_field: %r args=%r kwds=%r" % (field_name, args, kwds))
    #     try:
    #         out = string.Formatter.get_field(self, field_name, args, kwds)
    #     except Exception as exc:
    #         # TODO needs more than just a value
    #         return "!ERR %s" % exc


class DefaultOutputRenderer(object):
    """A default renderer for .format'ed output line
    """
    def __init__(self, format):
        self.format = format
        # We still need custom output formatter since at the "first level"
        # within .format template all items there is no `nadict`
        self.formatter = DefaultOutputFormatter()

    @classmethod
    def _dict_to_nadict(cls, v):
        """Traverse datastructure and replace any regular dict with nadict"""
        if isinstance(v, list):
            return [cls._dict_to_nadict(x) for x in v]
        elif isinstance(v, dict):
            return nadict((k, cls._dict_to_nadict(x)) for k, x in iteritems(v))
        else:
            return v

    def __call__(self, x, **kwargs):
        dd = nadict(
            (k, nadict({k_.replace(':', '#'): self._dict_to_nadict(v_)
                for k_, v_ in v.items()})
                if isinstance(v, dict) else v)
            for k, v in x.items()
        )

        msg = self.formatter.format(self.format, **dd)
        return ui.message(msg)


class Interface(object):
    """Base class for interface implementations"""

    # exit code to return if user-interrupted
    # if None, would just reraise the Exception, so if in --dbg
    # mode would fall into the debugger
    _interrupted_exit_code = 1

    _OLDSTYLE_COMMANDS = (
        'AddArchiveContent', 'CrawlInit', 'Crawl', 'CreateSiblingGithub',
        'CreateTestDataset', 'Export', 'Ls', 'SSHRun', 'Test')

    @classmethod
    def setup_parser(cls, parser):
        # XXX needs safety check for name collisions
        # XXX allow for parser kwargs customization
        parser_kwargs = {}
        from inspect import getargspec
        # get the signature
        ndefaults = 0
        args, varargs, varkw, defaults = getargspec(cls.__call__)
        if not defaults is None:
            ndefaults = len(defaults)
        for i, arg in enumerate(args):
            if not is_api_arg(arg):
                continue
            param = cls._params_[arg]
            defaults_idx = ndefaults - len(args) + i
            cmd_args = param.cmd_args
            if cmd_args is None:
                cmd_args = []
            if not len(cmd_args):
                if defaults_idx >= 0:
                    # dealing with a kwarg
                    template = '--%s'
                else:
                    # positional arg
                    template = '%s'
                # use parameter name as default argument name
                parser_args = (template % arg.replace('_', '-'),)
            else:
                parser_args = [c.replace('_', '-') for c in cmd_args]
            parser_kwargs = param.cmd_kwargs
            if defaults_idx >= 0:
                parser_kwargs['default'] = defaults[defaults_idx]
            help = alter_interface_docs_for_cmdline(param._doc)
            if help and help[-1] != '.':
                help += '.'
            if param.constraints is not None:
                parser_kwargs['type'] = param.constraints
                # include value constraint description and default
                # into the help string
                cdoc = alter_interface_docs_for_cmdline(
                    param.constraints.long_description())
                if cdoc[0] == '(' and cdoc[-1] == ')':
                    cdoc = cdoc[1:-1]
                help += '  Constraints: %s' % cdoc
            if defaults_idx >= 0:
                help += " [Default: %r]" % (defaults[defaults_idx],)
            # create the parameter, using the constraint instance for type
            # conversion
            parser.add_argument(*parser_args, help=help,
                                **parser_kwargs)

    @classmethod
    def call_from_parser(cls, args):
        # XXX needs safety check for name collisions
        from inspect import getargspec
        argspec = getargspec(cls.__call__)
        if argspec[2] is None:
            # no **kwargs in the call receiver, pull argnames from signature
            argnames = getargspec(cls.__call__)[0]
        else:
            # common options
            # XXX define or better get from elsewhere
            common_opts = ('change_path', 'common_debug', 'common_idebug', 'func',
                           'help', 'log_level', 'logger', 'pbs_runner',
                           'result_renderer', 'proc_pre', 'proc_post', 'subparser')
            argnames = [name for name in dir(args)
                        if not (name.startswith('_') or name in common_opts)]
        kwargs = {k: getattr(args, k) for k in argnames if is_api_arg(k)}
        # we are coming from the entry point, this is the toplevel command,
        # let it run like generator so we can act on partial results quicker
        # TODO remove following condition test when transition is complete and
        # run indented code unconditionally
        if cls.__name__ not in Interface._OLDSTYLE_COMMANDS:
            # set all common args explicitly  to override class defaults
            # that are tailored towards the the Python API
            kwargs['return_type'] = 'generator'
            kwargs['result_xfm'] = None
            # allow commands to override the default, unless something other than
            # default is requested
            kwargs['result_renderer'] = \
                args.common_output_format if args.common_output_format != 'default' \
                else getattr(cls, 'result_renderer', args.common_output_format)
            if '{' in args.common_output_format:
                # stupid hack, could and should become more powerful
                kwargs['result_renderer'] = DefaultOutputRenderer(args.common_output_format)

            if args.common_on_failure:
                kwargs['on_failure'] = args.common_on_failure
            # compose filter function from to be invented cmdline options
            res_filter = cls._get_result_filter(args)
            if res_filter is not None:
                # Don't add result_filter if it's None because then
                # eval_results can't distinguish between --report-{status,type}
                # not specified via the CLI and None passed via the Python API.
                kwargs['result_filter'] = res_filter
            kwargs['proc_pre'] = args.common_proc_pre
            kwargs['proc_post'] = args.common_proc_post
        try:
            ret = cls.__call__(**kwargs)
            if inspect.isgenerator(ret):
                ret = list(ret)
            if args.common_output_format == 'tailored' and \
                    hasattr(cls, 'custom_result_summary_renderer'):
                cls.custom_result_summary_renderer(ret)
            return ret
        except KeyboardInterrupt as exc:
            ui.error("\nInterrupted by user while doing magic: %s" % exc_str(exc))
            if cls._interrupted_exit_code is not None:
                sys.exit(cls._interrupted_exit_code)
            else:
                raise

    @classmethod
    def _get_result_filter(cls, args):
        from datalad import cfg
        result_filter = None
        if args.common_report_status or 'datalad.runtime.report-status' in cfg:
            report_status = args.common_report_status or \
                            cfg.obtain('datalad.runtime.report-status')
            if report_status == "all":
                pass  # no filter
            elif report_status == 'success':
                result_filter = EnsureKeyChoice('status', ('ok', 'notneeded'))
            elif report_status == 'failure':
                result_filter = EnsureKeyChoice('status',
                                                ('impossible', 'error'))
            else:
                result_filter = EnsureKeyChoice('status', (report_status,))
        if args.common_report_type:
            tfilt = EnsureKeyChoice('type', tuple(args.common_report_type))
            result_filter = result_filter & tfilt if result_filter else tfilt
        return result_filter

    @classmethod
    def get_refds_path(cls, dataset):
        """Return a resolved reference dataset path from a `dataset` argument"""
        # theoretically a dataset could come in as a relative path -> resolve
        if dataset is None:
            return dataset
        refds_path = dataset.path if isinstance(dataset, Dataset) \
            else Dataset(dataset).path
        if refds_path:
            refds_path = resolve_path(refds_path)
        return refds_path


def get_allargs_as_kwargs(call, args, kwargs):
    """Generate a kwargs dict from a call signature and *args, **kwargs

    Basically resolving the argnames for all positional arguments, and
    resolvin the defaults for all kwargs that are not given in a kwargs
    dict
    """
    from inspect import getargspec
    argspec = getargspec(call)
    defaults = argspec.defaults
    nargs = len(argspec.args)
    assert (nargs >= len(defaults))
    # map any args to their name
    argmap = list(zip(argspec.args[:len(args)], args))
    kwargs_ = OrderedDict(argmap)
    # map defaults of kwargs to their names (update below)
    for k, v in zip(argspec.args[-len(defaults):], defaults):
        if k not in kwargs_:
            kwargs_[k] = v
    # update with provided kwarg args
    kwargs_.update(kwargs)
    # XXX we cannot assert the following, because our own highlevel
    # API commands support more kwargs than what is discoverable
    # from their signature...
    #assert (nargs == len(kwargs_))
    return kwargs_

```
--- END FILE ---

Please first localize the bug based on the issue statement, and then generate *SEARCH/REPLACE* edits to fix the issue.

Every *SEARCH/REPLACE* edit must use this format:
1. The file path
2. The start of search block: <<<<<<< SEARCH
3. A contiguous chunk of lines to search for in the existing source code
4. The dividing line: =======
5. The lines to replace into the source code
6. The end of the replace block: >>>>>>> REPLACE

Here is an example:

```python
### mathweb/flask/app.py
<<<<<<< SEARCH
from flask import Flask
=======
import math
from flask import Flask
>>>>>>> REPLACE
```
</solution>

Please note that the *SEARCH/REPLACE* edit REQUIRES PROPER INDENTATION. If you would like to add the line '        print(x)', you must fully write that out, with all those spaces before the code!
Wrap each *SEARCH/REPLACE* edit in a code block as shown in the example above. If you have multiple *SEARCH/REPLACE* edits, use a separate code block for each one.
user