Bear.get_dependencies() - Code Metrics - Inspection of "Bear.py: Maintainers are authors by default" - coala-analyzer/coala - Measure and Improve Code Quality continuously with Scrutinizer

Completed

Pull Request — master (#2353)

by Zatreanu

created 2016-06-16 10:19 UTC

Bear.get_dependencies() A

↳ Parent: Bear

Complexity

Conditions

Size

Total Lines

Duplication

Lines	0
Ratio	0 %

Importance

Changes

Metric	Value
cc	1
dl	0
loc	12
rs	9.4285
c	0
b	0
f	0

import traceback
from functools import partial
from os import makedirs
from os.path import join, abspath, exists
from shutil import copyfileobj
from urllib.request import urlopen

from appdirs import user_data_dir

from pyprint.Printer import Printer

from coala_decorators.decorators import enforce_signature, classproperty
from coalib.bears.requirements.PackageRequirement import PackageRequirement

from coalib.bears.requirements.PythonRequirement import PythonRequirement

from coalib.output.printers.LogPrinter import LogPrinter
from coalib.results.Result import Result
from coalib.settings.FunctionMetadata import FunctionMetadata
from coalib.settings.Section import Section
from coalib.settings.ConfigurationGathering import get_config_directory


class Bear(Printer, LogPrinter):
    """
    A bear contains the actual subroutine that is responsible for checking
    source code for certain specifications. However it can actually do
    whatever it wants with the files it gets. If you are missing some Result
    type, feel free to contact us and/or help us extending the coalib.

    This is the base class for every bear. If you want to write an bear, you
    will probably want to look at the GlobalBear and LocalBear classes that
    inherit from this class. In any case you'll want to overwrite at least the
    run method. You can send debug/warning/error messages through the
    debug(), warn(), err() functions. These will send the
    appropriate messages so that they are outputted. Be aware that if you use
    err(), you are expected to also terminate the bear run-through
    immediately.

    If you need some setup or teardown for your bear, feel free to overwrite
    the set_up() and tear_down() functions. They will be invoked
    before/after every run invocation.

    Settings are available at all times through self.section.

    To indicate which languages your bear supports, just give it the
    ``LANGUAGES`` value which should be a set of string(s):

    >>> class SomeBear(Bear):
    ...     LANGUAGES = {'C', 'CPP','C#', 'D'}

    To indicate the requirements of the bear, assign ``REQUIREMENTS`` a tuple
    with instances of ``PackageRequirements``.

    >>> class SomeBear(Bear):
    ...     REQUIREMENTS = (
    ...         PackageRequirement('pip', 'coala_decorators', '0.2.1'),)

    If your bear uses requirements from a manager we have a subclass from,
    you can use the subclass, such as ``PythonRequirement``, without specifying
    manager:

    >>> class SomeBear(Bear):
    ...     REQUIREMENTS = (PythonRequirement('coala_decorators', '0.2.1'),)

    To specify multiple requirements using ``pip``, you can use the multiple
    method. This can receive both tuples of strings, in case you want a specific
    version, or a simple string, in case you want the latest version to be
    specified.

    >>> class SomeBear(Bear):
    ...     REQUIREMENTS = PythonRequirement.multiple(
    ...         ('colorama', '0.1'), 'coala_decorators')

    To specify additional attributes to your bear, use the following:

    >>> class SomeBear(Bear):
    ...     AUTHORS = {'Jon Snow'}
    ...     AUTHORS_EMAILS = {'[email protected]'}
    ...     MAINTAINERS = {'Catelyn Stark'}
    ...     MAINTAINERS_EMAILS = {'[email protected]'}
    ...     LICENSE = 'AGPL-3.0'

    If the maintainers are the same as the authors, they can be omitted:

    >>> class SomeBear(Bear):
    ...     AUTHORS = {'Jon Snow'}
    ...     AUTHORS_EMAILS = {'[email protected]'}
    >>> SomeBear.maintainers
    {'Jon Snow'}
    >>> SomeBear.maintainers_emails
    {'[email protected]'}

    If your bear needs to include local files, then specify it giving strings
    containing relative file paths to the INCLUDE_LOCAL_FILES set:

    >>> class SomeBear(Bear):
    ...     INCLUDE_LOCAL_FILES = {'checkstyle.jar', 'google_checks.xml'}

    To keep track easier of what a bear can do, simply tell it to the CAN_FIX
    and the CAN_DETECT sets. Possible values:

    >>> CAN_DETECT = {'Syntax', 'Formatting', 'Security', 'Complexity', 'Smell',
    ... 'Redundancy', 'Simplification', 'Variable Misuse', 'Spelling', 'Other'}
    >>> CAN_FIX = {'Syntax', ...}

    Specifying something to CAN_FIX makes it obvious that it can be detected
    too, so it may be omitted:

    >>> class SomeBear(Bear):
    ...     CAN_DETECT = {'Syntax', 'Security'}
    ...     CAN_FIX = {'Simplification'}
    >>> list(sorted(SomeBear.can_detect))
    ['Security', 'Simplification', 'Syntax']

    Every bear has a data directory which is unique to that particular bear:

    >>> class SomeBear(Bear): pass
    >>> class SomeOtherBear(Bear): pass
    >>> SomeBear.data_dir == SomeOtherBear.data_dir
    False
    """

    LANGUAGES = set()
    REQUIREMENTS = ()
    AUTHORS = set()
    AUTHORS_EMAILS = set()
    MAINTAINERS = set()
    MAINTAINERS_EMAILS = set()
    PLATFORMS = {'any'}
    LICENSE = ''
    INCLUDE_LOCAL_FILES = set()
    CAN_DETECT = set()
    CAN_FIX = set()

    @classproperty
    def name(cls):
        """
        :return: The name of the bear
        """
        return cls.__name__

    @classproperty
    def can_detect(cls):
        """
        :return: A set that contains everything a bear can detect, gathering
                 information from what it can fix too.
        """
        return cls.CAN_DETECT | cls.CAN_FIX

    @classproperty
    def maintainers(cls):
        """
        :return: A set containing MAINTAINERS if specified, else takes
                 AUTHORS by default.
        """
        return cls.AUTHORS if cls.MAINTAINERS == set() else cls.MAINTAINERS

    @classproperty
    def maintainers_emails(cls):
        """
        :return: A set containing MAINTAINERS_EMAILS if specified, else takes
                 AUTHORS_EMAILS by default.
        """
        return (cls.AUTHORS_EMAILS if cls.MAINTAINERS_EMAILS == set()
                else cls.MAINTAINERS)

    @enforce_signature
    def __init__(self,
                 section: Section,
                 message_queue,
                 timeout=0):
        """
        Constructs a new bear.

        :param section:       The section object where bear settings are
                              contained.
        :param message_queue: The queue object for messages. Can be ``None``.
        :param timeout:       The time the bear is allowed to run. To set no
                              time limit, use 0.
        :raises TypeError:    Raised when ``message_queue`` is no queue.
        :raises RuntimeError: Raised when bear requirements are not fulfilled.
        """
        Printer.__init__(self)
        LogPrinter.__init__(self, self)

        if message_queue is not None and not hasattr(message_queue, "put"):
            raise TypeError("message_queue has to be a Queue or None.")

        self.section = section
        self.message_queue = message_queue
        self.timeout = timeout

        self.setup_dependencies()
        cp = type(self).check_prerequisites()
        if cp is not True:
            error_string = ("The bear " + self.name +
                            " does not fulfill all requirements.")
            if cp is not False:
                error_string += " " + cp

            self.warn(error_string)
            raise RuntimeError(error_string)

    def _print(self, output, **kwargs):
        self.debug(output)

    def log_message(self, log_message, timestamp=None, **kwargs):
        if self.message_queue is not None:
            self.message_queue.put(log_message)

    def run(self, *args, dependency_results=None, **kwargs):
        raise NotImplementedError

    def run_bear_from_section(self, args, kwargs):
        try:
            kwargs.update(
                self.get_metadata().create_params_from_section(self.section))
        except ValueError as err:
            self.warn("The bear {} cannot be executed.".format(
                self.name), str(err))
            return

        return self.run(*args, **kwargs)

    def execute(self, *args, **kwargs):
        name = self.name
        try:
            self.debug("Running bear {}...".format(name))
            # If it's already a list it won't change it
            return list(self.run_bear_from_section(args, kwargs) or [])
        except:
            self.warn(
                "Bear {} failed to run. Take a look at debug messages (`-L "
                "DEBUG`) for further information.".format(name))
            self.debug(
                "The bear {bear} raised an exception. If you are the writer "
                "of this bear, please make sure to catch all exceptions. If "
                "not and this error annoys you, you might want to get in "
                "contact with the writer of this bear.\n\nTraceback "
                "information is provided below:\n\n{traceback}"
                "\n".format(bear=name, traceback=traceback.format_exc()))

    @staticmethod
    def kind():
        """
        :return: The kind of the bear
        """
        raise NotImplementedError

    @classmethod
    def get_metadata(cls):
        """
        :return: Metadata for the run function. However parameters like
                 ``self`` or parameters implicitly used by coala (e.g.
                 filename for local bears) are already removed.
        """
        return FunctionMetadata.from_function(
            cls.run,
            omit={"self", "dependency_results"})

    @classmethod
    def missing_dependencies(cls, lst):
        """
        Checks if the given list contains all dependencies.

        :param lst: A list of all already resolved bear classes (not
                    instances).
        :return:    A list of missing dependencies.
        """
        dep_classes = cls.get_dependencies()

        for item in lst:
            if item in dep_classes:
                dep_classes.remove(item)

        return dep_classes

    @staticmethod
    def get_dependencies():
        """
        Retrieves bear classes that are to be executed before this bear gets
        executed. The results of these bears will then be passed to the
        run method as a dict via the dependency_results argument. The dict
        will have the name of the Bear as key and the list of its results as
        results.

        :return: A list of bear classes.
        """
        return []

    @classmethod
    def get_non_optional_settings(cls):
        """
        This method has to determine which settings are needed by this bear.
        The user will be prompted for needed settings that are not available
        in the settings file so don't include settings where a default value
        would do.

        :return: A dictionary of needed settings as keys and a tuple of help
                 text and annotation as values
        """
        return cls.get_metadata().non_optional_params

    @staticmethod
    def setup_dependencies():
        """
        This is a user defined function that can download and set up
        dependencies (via download_cached_file or arbitary other means) in an OS
        independent way.
        """

    @classmethod
    def check_prerequisites(cls):
        """
        Checks whether needed runtime prerequisites of the bear are satisfied.

        This function gets executed at construction and returns True by
        default.

        Section value requirements shall be checked inside the ``run`` method.

        :return: True if prerequisites are satisfied, else False or a string
                 that serves a more detailed description of what's missing.
        """
        return True

    def get_config_dir(self):
        """
        Gives the directory where the configuration file is

        :return: Directory of the config file
        """
        return get_config_directory(self.section)

    def download_cached_file(self, url, filename):
        """
        Downloads the file if needed and caches it for the next time. If a
        download happens, the user will be informed.

        Take a sane simple bear:

        >>> from queue import Queue
        >>> bear = Bear(Section("a section"), Queue())

        We can now carelessly query for a neat file that doesn't exist yet:

        >>> from os import remove
        >>> if exists(join(bear.data_dir, "a_file")):
        ...     remove(join(bear.data_dir, "a_file"))
        >>> file = bear.download_cached_file("http://gitmate.com/", "a_file")

        If we download it again, it'll be much faster as no download occurs:

        >>> newfile = bear.download_cached_file("http://gitmate.com/", "a_file")
        >>> newfile == file
        True

        :param url:      The URL to download the file from.
        :param filename: The filename it should get, e.g. "test.txt".
        :return:         A full path to the file ready for you to use!
        """
        filename = join(self.data_dir, filename)
        if exists(filename):
            return filename

        self.info("Downloading {filename!r} for bear {bearname} from {url}."
                  .format(filename=filename, bearname=self.name, url=url))

        with urlopen(url) as response, open(filename, 'wb') as out_file:
            copyfileobj(response, out_file)
        return filename

    @classproperty
    def data_dir(cls):
        """
        Returns a directory that may be used by the bear to store stuff. Every
        bear has an own directory dependent on his name.
        """
        data_dir = abspath(join(user_data_dir('coala-bears'), cls.name))

        makedirs(data_dir, exist_ok=True)
        return data_dir

    @property
    def new_result(self):
        """
        Returns a partial for creating a result with this bear already bound.
        """
        return partial(Result.from_values, self)


1			import traceback
2			from functools import partial
3			from os import makedirs
4			from os.path import join, abspath, exists
5			from shutil import copyfileobj
6			from urllib.request import urlopen
7
8			from appdirs import user_data_dir
9
10			from pyprint.Printer import Printer
11
12			from coala_decorators.decorators import enforce_signature, classproperty
13			from coalib.bears.requirements.PackageRequirement import PackageRequirement
			0 ignored issues – show Unused Code introduced 2016-05-23 19:58 UTC by Report Bug Copy Issue Report Unused PackageRequirement imported from coalib.bears.requirements.PackageRequirement Loading history...
14			from coalib.bears.requirements.PythonRequirement import PythonRequirement
			0 ignored issues – show Unused Code introduced 2016-05-23 19:58 UTC by Report Bug Copy Issue Report Unused PythonRequirement imported from coalib.bears.requirements.PythonRequirement Loading history...
15			from coalib.output.printers.LogPrinter import LogPrinter
16			from coalib.results.Result import Result
17			from coalib.settings.FunctionMetadata import FunctionMetadata
18			from coalib.settings.Section import Section
19			from coalib.settings.ConfigurationGathering import get_config_directory
20
21
22			class Bear(Printer, LogPrinter):
23			"""
24			A bear contains the actual subroutine that is responsible for checking
25			source code for certain specifications. However it can actually do
26			whatever it wants with the files it gets. If you are missing some Result
27			type, feel free to contact us and/or help us extending the coalib.
28
29			This is the base class for every bear. If you want to write an bear, you
30			will probably want to look at the GlobalBear and LocalBear classes that
31			inherit from this class. In any case you'll want to overwrite at least the
32			run method. You can send debug/warning/error messages through the
33			debug(), warn(), err() functions. These will send the
34			appropriate messages so that they are outputted. Be aware that if you use
35			err(), you are expected to also terminate the bear run-through
36			immediately.
37
38			If you need some setup or teardown for your bear, feel free to overwrite
39			the set_up() and tear_down() functions. They will be invoked
40			before/after every run invocation.
41
42			Settings are available at all times through self.section.
43
44			To indicate which languages your bear supports, just give it the
45			``LANGUAGES`` value which should be a set of string(s):
46
47			>>> class SomeBear(Bear):
48			... LANGUAGES = {'C', 'CPP','C#', 'D'}
49
50			To indicate the requirements of the bear, assign ``REQUIREMENTS`` a tuple
51			with instances of ``PackageRequirements``.
52
53			>>> class SomeBear(Bear):
54			... REQUIREMENTS = (
55			... PackageRequirement('pip', 'coala_decorators', '0.2.1'),)
56
57			If your bear uses requirements from a manager we have a subclass from,
58			you can use the subclass, such as ``PythonRequirement``, without specifying
59			manager:
60
61			>>> class SomeBear(Bear):
62			... REQUIREMENTS = (PythonRequirement('coala_decorators', '0.2.1'),)
63
64			To specify multiple requirements using ``pip``, you can use the multiple
65			method. This can receive both tuples of strings, in case you want a specific
66			version, or a simple string, in case you want the latest version to be
67			specified.
68
69			>>> class SomeBear(Bear):
70			... REQUIREMENTS = PythonRequirement.multiple(
71			... ('colorama', '0.1'), 'coala_decorators')
72
73			To specify additional attributes to your bear, use the following:
74
75			>>> class SomeBear(Bear):
76			... AUTHORS = {'Jon Snow'}
77			... AUTHORS_EMAILS = {'[email protected]'}
78			... MAINTAINERS = {'Catelyn Stark'}
79			... MAINTAINERS_EMAILS = {'[email protected]'}
80			... LICENSE = 'AGPL-3.0'
81
82			If the maintainers are the same as the authors, they can be omitted:
83
84			>>> class SomeBear(Bear):
85			... AUTHORS = {'Jon Snow'}
86			... AUTHORS_EMAILS = {'[email protected]'}
87			>>> SomeBear.maintainers
88			{'Jon Snow'}
89			>>> SomeBear.maintainers_emails
90			{'[email protected]'}
91
92			If your bear needs to include local files, then specify it giving strings
93			containing relative file paths to the INCLUDE_LOCAL_FILES set:
94
95			>>> class SomeBear(Bear):
96			... INCLUDE_LOCAL_FILES = {'checkstyle.jar', 'google_checks.xml'}
97
98			To keep track easier of what a bear can do, simply tell it to the CAN_FIX
99			and the CAN_DETECT sets. Possible values:
100
101			>>> CAN_DETECT = {'Syntax', 'Formatting', 'Security', 'Complexity', 'Smell',
102			... 'Redundancy', 'Simplification', 'Variable Misuse', 'Spelling', 'Other'}
103			>>> CAN_FIX = {'Syntax', ...}
104
105			Specifying something to CAN_FIX makes it obvious that it can be detected
106			too, so it may be omitted:
107
108			>>> class SomeBear(Bear):
109			... CAN_DETECT = {'Syntax', 'Security'}
110			... CAN_FIX = {'Simplification'}
111			>>> list(sorted(SomeBear.can_detect))
112			['Security', 'Simplification', 'Syntax']
113
114			Every bear has a data directory which is unique to that particular bear:
115
116			>>> class SomeBear(Bear): pass
117			>>> class SomeOtherBear(Bear): pass
118			>>> SomeBear.data_dir == SomeOtherBear.data_dir
119			False
120			"""
121
122			LANGUAGES = set()
123			REQUIREMENTS = ()
124			AUTHORS = set()
125			AUTHORS_EMAILS = set()
126			MAINTAINERS = set()
127			MAINTAINERS_EMAILS = set()
128			PLATFORMS = {'any'}
129			LICENSE = ''
130			INCLUDE_LOCAL_FILES = set()
131			CAN_DETECT = set()
132			CAN_FIX = set()
133
134			@classproperty
135			def name(cls):
136			"""
137			:return: The name of the bear
138			"""
139			return cls.__name__
140
141			@classproperty
142			def can_detect(cls):
143			"""
144			:return: A set that contains everything a bear can detect, gathering
145			information from what it can fix too.
146			"""
147			return cls.CAN_DETECT \| cls.CAN_FIX
148
149			@classproperty
150			def maintainers(cls):
151			"""
152			:return: A set containing MAINTAINERS if specified, else takes
153			AUTHORS by default.
154			"""
155			return cls.AUTHORS if cls.MAINTAINERS == set() else cls.MAINTAINERS
156
157			@classproperty
158			def maintainers_emails(cls):
159			"""
160			:return: A set containing MAINTAINERS_EMAILS if specified, else takes
161			AUTHORS_EMAILS by default.
162			"""
163			return (cls.AUTHORS_EMAILS if cls.MAINTAINERS_EMAILS == set()
164			else cls.MAINTAINERS)
165
166			@enforce_signature
167			def __init__(self,
168			section: Section,
169			message_queue,
170			timeout=0):
171			"""
172			Constructs a new bear.
173
174			:param section: The section object where bear settings are
175			contained.
176			:param message_queue: The queue object for messages. Can be ``None``.
177			:param timeout: The time the bear is allowed to run. To set no
178			time limit, use 0.
179			:raises TypeError: Raised when ``message_queue`` is no queue.
180			:raises RuntimeError: Raised when bear requirements are not fulfilled.
181			"""
182			Printer.__init__(self)
183			LogPrinter.__init__(self, self)
184
185			if message_queue is not None and not hasattr(message_queue, "put"):
186			raise TypeError("message_queue has to be a Queue or None.")
187
188			self.section = section
189			self.message_queue = message_queue
190			self.timeout = timeout
191
192			self.setup_dependencies()
193			cp = type(self).check_prerequisites()
194			if cp is not True:
195			error_string = ("The bear " + self.name +
196			" does not fulfill all requirements.")
197			if cp is not False:
198			error_string += " " + cp
199
200			self.warn(error_string)
201			raise RuntimeError(error_string)
202
203			def _print(self, output, **kwargs):
204			self.debug(output)
205
206			def log_message(self, log_message, timestamp=None, **kwargs):
207			if self.message_queue is not None:
208			self.message_queue.put(log_message)
209
210			def run(self, args, dependency_results=None, *kwargs):
211			raise NotImplementedError
212
213			def run_bear_from_section(self, args, kwargs):
214			try:
215			kwargs.update(
216			self.get_metadata().create_params_from_section(self.section))
217			except ValueError as err:
218			self.warn("The bear {} cannot be executed.".format(
219			self.name), str(err))
220			return
221
222			return self.run(args, *kwargs)
223
224			def execute(self, args, *kwargs):
225			name = self.name
226			try:
227			self.debug("Running bear {}...".format(name))
228			# If it's already a list it won't change it
229			return list(self.run_bear_from_section(args, kwargs) or [])
230			except:
231			self.warn(
232			"Bear {} failed to run. Take a look at debug messages (`-L "
233			"DEBUG`) for further information.".format(name))
234			self.debug(
235			"The bear {bear} raised an exception. If you are the writer "
236			"of this bear, please make sure to catch all exceptions. If "
237			"not and this error annoys you, you might want to get in "
238			"contact with the writer of this bear.\n\nTraceback "
239			"information is provided below:\n\n{traceback}"
240			"\n".format(bear=name, traceback=traceback.format_exc()))
241
242			@staticmethod
243			def kind():
244			"""
245			:return: The kind of the bear
246			"""
247			raise NotImplementedError
248
249			@classmethod
250			def get_metadata(cls):
251			"""
252			:return: Metadata for the run function. However parameters like
253			``self`` or parameters implicitly used by coala (e.g.
254			filename for local bears) are already removed.
255			"""
256			return FunctionMetadata.from_function(
257			cls.run,
258			omit={"self", "dependency_results"})
259
260			@classmethod
261			def missing_dependencies(cls, lst):
262			"""
263			Checks if the given list contains all dependencies.
264
265			:param lst: A list of all already resolved bear classes (not
266			instances).
267			:return: A list of missing dependencies.
268			"""
269			dep_classes = cls.get_dependencies()
270
271			for item in lst:
272			if item in dep_classes:
273			dep_classes.remove(item)
274
275			return dep_classes
276
277			@staticmethod
278			def get_dependencies():
279			"""
280			Retrieves bear classes that are to be executed before this bear gets
281			executed. The results of these bears will then be passed to the
282			run method as a dict via the dependency_results argument. The dict
283			will have the name of the Bear as key and the list of its results as
284			results.
285
286			:return: A list of bear classes.
287			"""
288			return []
289
290			@classmethod
291			def get_non_optional_settings(cls):
292			"""
293			This method has to determine which settings are needed by this bear.
294			The user will be prompted for needed settings that are not available
295			in the settings file so don't include settings where a default value
296			would do.
297
298			:return: A dictionary of needed settings as keys and a tuple of help
299			text and annotation as values
300			"""
301			return cls.get_metadata().non_optional_params
302
303			@staticmethod
304			def setup_dependencies():
305			"""
306			This is a user defined function that can download and set up
307			dependencies (via download_cached_file or arbitary other means) in an OS
308			independent way.
309			"""
310
311			@classmethod
312			def check_prerequisites(cls):
313			"""
314			Checks whether needed runtime prerequisites of the bear are satisfied.
315
316			This function gets executed at construction and returns True by
317			default.
318
319			Section value requirements shall be checked inside the ``run`` method.
320
321			:return: True if prerequisites are satisfied, else False or a string
322			that serves a more detailed description of what's missing.
323			"""
324			return True
325
326			def get_config_dir(self):
327			"""
328			Gives the directory where the configuration file is
329
330			:return: Directory of the config file
331			"""
332			return get_config_directory(self.section)
333
334			def download_cached_file(self, url, filename):
335			"""
336			Downloads the file if needed and caches it for the next time. If a
337			download happens, the user will be informed.
338
339			Take a sane simple bear:
340
341			>>> from queue import Queue
342			>>> bear = Bear(Section("a section"), Queue())
343
344			We can now carelessly query for a neat file that doesn't exist yet:
345
346			>>> from os import remove
347			>>> if exists(join(bear.data_dir, "a_file")):
348			... remove(join(bear.data_dir, "a_file"))
349			>>> file = bear.download_cached_file("http://gitmate.com/", "a_file")
350
351			If we download it again, it'll be much faster as no download occurs:
352
353			>>> newfile = bear.download_cached_file("http://gitmate.com/", "a_file")
354			>>> newfile == file
355			True
356
357			:param url: The URL to download the file from.
358			:param filename: The filename it should get, e.g. "test.txt".
359			:return: A full path to the file ready for you to use!
360			"""
361			filename = join(self.data_dir, filename)
362			if exists(filename):
363			return filename
364
365			self.info("Downloading {filename!r} for bear {bearname} from {url}."
366			.format(filename=filename, bearname=self.name, url=url))
367
368			with urlopen(url) as response, open(filename, 'wb') as out_file:
369			copyfileobj(response, out_file)
370			return filename
371
372			@classproperty
373			def data_dir(cls):
374			"""
375			Returns a directory that may be used by the bear to store stuff. Every
376			bear has an own directory dependent on his name.
377			"""
378			data_dir = abspath(join(user_data_dir('coala-bears'), cls.name))
379
380			makedirs(data_dir, exist_ok=True)
381			return data_dir
382
383			@property
384			def new_result(self):
385			"""
386			Returns a partial for creating a result with this bear already bound.
387			"""
388			return partial(Result.from_values, self)
389

coala-analyzer / coala

Pull Request — master (#2353)

Bear.get_dependencies() A

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