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from collections import Iterable, namedtuple |
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from glob import iglob |
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import os.path |
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from coala_utils.decorators import ( |
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enforce_signature, generate_eq, generate_repr) |
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from coalib.parsing.ConfParser import ConfParser |
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@generate_repr() |
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@generate_eq("language", "docstyle", "markers") |
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class DocstyleDefinition: |
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""" |
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The DocstyleDefinition class holds values that identify a certain type of |
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documentation comment (for which language, documentation style/tool used |
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etc.). |
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""" |
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Metadata = namedtuple("Metadata", ("param_start", "param_end", |
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"return_sep")) |
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@enforce_signature |
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def __init__(self, language: str, docstyle: str, markers: (Iterable, str), |
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metadata: Metadata): |
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""" |
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Instantiates a new DocstyleDefinition. |
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:param language: The case insensitive programming language of the |
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documentation comment, e.g. ``"CPP"`` for C++ or |
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``"PYTHON3"``. |
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:param docstyle: The case insensitive documentation style/tool used |
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to document code, e.g. ``"default"`` or ``"doxygen"``. |
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:param markers: An iterable of marker/delimiter string iterables |
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or a single marker/delimiter string iterable that |
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identify a documentation comment. See ``markers`` |
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property for more details on markers. |
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:param metadata: A namedtuple consisting of certain attributes that |
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form the layout of the certain documentation comment |
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e.g. ``param_start`` defining the start symbol of |
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the parameter fields and ``param_end`` defining the |
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end. |
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""" |
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self._language = language.lower() |
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self._docstyle = docstyle.lower() |
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# Check and modify tuple if only one marker_set exists. |
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markers = tuple(markers) |
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if len(markers) == 3 and all(isinstance(x, str) for x in markers): |
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markers = (markers,) |
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self._markers = tuple(tuple(marker_set) for marker_set in markers) |
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# Check marker set dimensions. |
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for marker_set in self._markers: |
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length = len(marker_set) |
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if length != 3: |
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raise ValueError("Length of a given marker set was not 3 (was " |
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"actually {}).".format(length)) |
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self._metadata = metadata |
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@property |
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def language(self): |
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""" |
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The programming language. |
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:return: A lower-case string defining the programming language (i.e. |
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"cpp" or "python"). |
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""" |
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return self._language |
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@property |
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def docstyle(self): |
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""" |
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The documentation style/tool used to document code. |
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:return: A lower-case string defining the docstyle (i.e. "default" or |
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"doxygen"). |
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""" |
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return self._docstyle |
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@property |
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def markers(self): |
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""" |
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A tuple of marker sets that identify a documentation comment. |
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Marker sets consist of 3 entries where the first is the start-marker, |
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the second one the each-line marker and the last one the end-marker. |
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For example a marker tuple with a single marker set |
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``(("/**", "*", "*/"),)`` would match following documentation comment: |
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:: |
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/** |
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* This is documentation. |
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*/ |
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It's also possible to supply an empty each-line marker |
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(``("/**", "", "*/")``): |
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:: |
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/** |
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This is more documentation. |
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*/ |
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Markers are matched "greedy", that means it will match as many |
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each-line markers as possible. I.e. for ``("///", "///", "///")``): |
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:: |
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/// Brief documentation. |
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/// |
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/// Detailed documentation. |
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:return: A tuple of marker/delimiter string tuples that identify a |
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documentation comment. |
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""" |
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return self._markers |
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@property |
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def metadata(self): |
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""" |
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A namedtuple of certain attributes present in the documentation. |
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These attributes are used to define parts of the documentation. |
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""" |
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return self._metadata |
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@classmethod |
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@enforce_signature |
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def load(cls, language: str, docstyle: str, coalang_dir=None): |
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""" |
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Loads a ``DocstyleDefinition`` from the coala docstyle definition files. |
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This function considers all settings inside the according coalang-files |
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as markers, except ``param_start``, ``param_end`` and ``return_sep`` |
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which are considered as special metadata markers. |
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.. note:: |
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When placing new coala docstyle definition files, these must |
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consist of only lowercase letters and end with ``.coalang``! |
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:param language: The case insensitive programming language of |
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the documentation comment as a string. |
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:param docstyle: The case insensitive documentation |
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style/tool used to document code, e.g. |
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``"default"`` or ``"doxygen"``. |
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:param coalang_dir: Path to directory with coalang docstyle |
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definition files. This replaces the default |
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path if given. |
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:raises FileNotFoundError: Raised when the given docstyle was not |
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found. |
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:raises KeyError: Raised when the given language is not |
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defined for given docstyle. |
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:return: The ``DocstyleDefinition`` for given language |
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and docstyle. |
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""" |
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docstyle = docstyle.lower() |
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language_config_parser = ConfParser(remove_empty_iter_elements=False) |
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coalang_file = os.path.join( |
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coalang_dir or os.path.dirname(__file__), docstyle + ".coalang") |
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try: |
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docstyle_settings = language_config_parser.parse(coalang_file) |
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except FileNotFoundError: |
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raise FileNotFoundError("Docstyle definition " + repr(docstyle) + |
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" not found.") |
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language = language.lower() |
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try: |
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docstyle_settings = docstyle_settings[language] |
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except KeyError: |
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raise KeyError("Language {!r} is not defined for docstyle {!r}." |
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.format(language, docstyle)) |
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metadata_settings = ("param_start", "param_end", "return_sep") |
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metadata = cls.Metadata(*(str(docstyle_settings.get(req_setting, "")) |
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for req_setting in metadata_settings)) |
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marker_sets = (tuple(value) |
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for key, value in |
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docstyle_settings.contents.items() |
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if key not in metadata_settings and |
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not key.startswith("comment")) |
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return cls(language, docstyle, marker_sets, metadata) |
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@staticmethod |
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def get_available_definitions(): |
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""" |
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Returns a sequence of pairs with ``(docstyle, language)`` which are |
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available when using ``load()``. |
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:return: A sequence of pairs with ``(docstyle, language)``. |
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""" |
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language_config_parser = ConfParser(remove_empty_iter_elements=False) |
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pattern = os.path.join(os.path.dirname(__file__), "*.coalang") |
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for coalang_file in iglob(pattern): |
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docstyle = os.path.splitext(os.path.basename(coalang_file))[0] |
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# Ignore files that are not lowercase, as coalang files have to be. |
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if docstyle.lower() == docstyle: |
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for language in language_config_parser.parse(coalang_file): |
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yield docstyle, language.lower() |
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