python-gitlab/gitlab/base.py at master · nathschmidt/python-gitlab · GitHub

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# -*- coding: utf-8 -*-

# This program is free software: you can redistribute it and/or modify

# it under the terms of the GNU Lesser General Public License as published by

# the Free Software Foundation, either version 3 of the License, or

# (at your option) any later version.

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the

# GNU Lesser General Public License for more details.

# You should have received a copy of the GNU Lesser General Public License

# along with this program. If not, see <http://www.gnu.org/licenses/>.

import copy

import importlib

import itertools

import json

import sys

import six

import gitlab

from gitlab.exceptions import * # noqa

class jsonEncoder(json.JSONEncoder):

def default(self, obj):

if isinstance(obj, GitlabObject):

return obj.as_dict()

elif isinstance(obj, gitlab.Gitlab):

return {'url': obj._url}

return json.JSONEncoder.default(self, obj)

class BaseManager(object):

"""Base manager class for API operations.

Managers provide method to manage GitLab API objects, such as retrieval,

listing, creation.

Inherited class must define the ``obj_cls`` attribute.

Attributes:

obj_cls (class): class of objects wrapped by this manager.

"""

obj_cls = None

def __init__(self, gl, parent=None, args=[]):

"""Constructs a manager.

Args:

gl (gitlab.Gitlab): Gitlab object referencing the GitLab server.

parent (Optional[Manager]): A parent manager.

args (list): A list of tuples defining a link between the

parent/child attributes.

Raises:

AttributeError: If `obj_cls` is None.

"""

self.gitlab = gl

self.args = args

self.parent = parent

if self.obj_cls is None:

raise AttributeError("obj_cls must be defined")

def _set_parent_args(self, **kwargs):

args = copy.copy(kwargs)

if self.parent is not None:

for attr, parent_attr in self.args:

args.setdefault(attr, getattr(self.parent, parent_attr))

return args

def get(self, id=None, **kwargs):

"""Get a GitLab object.

Args:

id: ID of the object to retrieve.

**kwargs: Additional arguments to send to GitLab.

Returns:

object: An object of class `obj_cls`.

Raises:

NotImplementedError: If objects cannot be retrieved.

GitlabGetError: If the server fails to perform the request.

"""

args = self._set_parent_args(**kwargs)

if not self.obj_cls.canGet:

raise NotImplementedError

if id is None and self.obj_cls.getRequiresId is True:

raise ValueError('The id argument must be defined.')

return self.obj_cls.get(self.gitlab, id, **args)

def list(self, **kwargs):

"""Get a list of GitLab objects.

Args:

**kwargs: Additional arguments to send to GitLab.

Returns:

list[object]: A list of `obj_cls` objects.

Raises:

NotImplementedError: If objects cannot be listed.

GitlabListError: If the server fails to perform the request.

"""

args = self._set_parent_args(**kwargs)

if not self.obj_cls.canList:

raise NotImplementedError

return self.obj_cls.list(self.gitlab, **args)

def create(self, data, **kwargs):

"""Create a new object of class `obj_cls`.

Args:

data (dict): The parameters to send to the GitLab server to create

the object. Required and optional arguments are defined in the

`requiredCreateAttrs` and `optionalCreateAttrs` of the

`obj_cls` class.

**kwargs: Additional arguments to send to GitLab.

Returns:

object: A newly create `obj_cls` object.

Raises:

NotImplementedError: If objects cannot be created.

GitlabCreateError: If the server fails to perform the request.

"""

args = self._set_parent_args(**kwargs)

if not self.obj_cls.canCreate:

raise NotImplementedError

return self.obj_cls.create(self.gitlab, data, **args)

def delete(self, id, **kwargs):

"""Delete a GitLab object.

Args:

id: ID of the object to delete.

Raises:

NotImplementedError: If objects cannot be deleted.

GitlabDeleteError: If the server fails to perform the request.

"""

args = self._set_parent_args(**kwargs)

if not self.obj_cls.canDelete:

raise NotImplementedError

self.gitlab.delete(self.obj_cls, id, **args)

class GitlabObject(object):

"""Base class for all classes that interface with GitLab."""

#: Url to use in GitLab for this object

_url = None

# Some objects (e.g. merge requests) have different urls for singular and

# plural

_urlPlural = None

_id_in_delete_url = True

_id_in_update_url = True

_constructorTypes = None

#: Tells if GitLab-api allows retrieving single objects.

canGet = True

#: Tells if GitLab-api allows listing of objects.

canList = True

#: Tells if GitLab-api allows creation of new objects.

canCreate = True

#: Tells if GitLab-api allows updating object.

canUpdate = True

#: Tells if GitLab-api allows deleting object.

canDelete = True

#: Attributes that are required for constructing url.

requiredUrlAttrs = []

#: Attributes that are required when retrieving list of objects.

requiredListAttrs = []

#: Attributes that are optional when retrieving list of objects.

optionalListAttrs = []

#: Attributes that are optional when retrieving single object.

optionalGetAttrs = []

#: Attributes that are required when retrieving single object.

requiredGetAttrs = []

#: Attributes that are required when deleting object.

requiredDeleteAttrs = []

#: Attributes that are required when creating a new object.

requiredCreateAttrs = []

#: Attributes that are optional when creating a new object.

optionalCreateAttrs = []

#: Attributes that are required when updating an object.

requiredUpdateAttrs = []

#: Attributes that are optional when updating an object.

optionalUpdateAttrs = []

#: Whether the object ID is required in the GET url.

getRequiresId = True

#: List of managers to create.

managers = []

#: Name of the identifier of an object.

idAttr = 'id'

#: Attribute to use as ID when displaying the object.

shortPrintAttr = None

def _data_for_gitlab(self, extra_parameters={}, update=False,

as_json=True):

data = {}

if update and (self.requiredUpdateAttrs or self.optionalUpdateAttrs):

attributes = itertools.chain(self.requiredUpdateAttrs,

self.optionalUpdateAttrs)

else:

attributes = itertools.chain(self.requiredCreateAttrs,

self.optionalCreateAttrs)

attributes = list(attributes) + ['sudo', 'page', 'per_page']

for attribute in attributes:

if hasattr(self, attribute):

value = getattr(self, attribute)

# labels need to be sent as a comma-separated list

if attribute == 'labels' and isinstance(value, list):

value = ", ".join(value)

elif attribute == 'sudo':

value = str(value)

data[attribute] = value

data.update(extra_parameters)

return json.dumps(data) if as_json else data

@classmethod

def list(cls, gl, **kwargs):

"""Retrieve a list of objects from GitLab.

Args:

gl (gitlab.Gitlab): Gitlab object referencing the GitLab server.

per_page (int): Maximum number of items to return.

page (int): ID of the page to return when using pagination.

Returns:

list[object]: A list of objects.

Raises:

NotImplementedError: If objects can't be listed.

GitlabListError: If the server cannot perform the request.

"""

if not cls.canList:

raise NotImplementedError

if not cls._url:

raise NotImplementedError

return gl.list(cls, **kwargs)

@classmethod

def get(cls, gl, id, **kwargs):

"""Retrieve a single object.

Args:

gl (gitlab.Gitlab): Gitlab object referencing the GitLab server.

id (int or str): ID of the object to retrieve.

Returns:

object: The found GitLab object.

Raises:

NotImplementedError: If objects can't be retrieved.

GitlabGetError: If the server cannot perform the request.

"""

if cls.canGet is False:

raise NotImplementedError

elif cls.canGet is True:

return cls(gl, id, **kwargs)

elif cls.canGet == 'from_list':

for obj in cls.list(gl, **kwargs):

obj_id = getattr(obj, obj.idAttr)

if str(obj_id) == str(id):

return obj

raise GitlabGetError("Object not found")

def _get_object(self, k, v, **kwargs):

if self._constructorTypes and k in self._constructorTypes:

cls = getattr(self._module, self._constructorTypes[k])

return cls(self.gitlab, v, **kwargs)

else:

return v

def _set_from_dict(self, data, **kwargs):

if not hasattr(data, 'items'):

return

for k, v in data.items():

# If a k attribute already exists and is a Manager, do nothing (see

# https://github.com/python-gitlab/python-gitlab/issues/209)

if isinstance(getattr(self, k, None), BaseManager):

continue

if isinstance(v, list):

self.__dict__[k] = []

for i in v:

self.__dict__[k].append(self._get_object(k, i, **kwargs))

elif v is None:

self.__dict__[k] = None

else:

self.__dict__[k] = self._get_object(k, v, **kwargs)

def _create(self, **kwargs):

if not self.canCreate:

raise NotImplementedError

json = self.gitlab.create(self, **kwargs)

self._set_from_dict(json)

self._from_api = True

def _update(self, **kwargs):

if not self.canUpdate:

raise NotImplementedError

json = self.gitlab.update(self, **kwargs)

self._set_from_dict(json)

def save(self, **kwargs):

if self._from_api:

self._update(**kwargs)

else:

self._create(**kwargs)

def delete(self, **kwargs):

if not self.canDelete:

raise NotImplementedError

if not self._from_api:

raise GitlabDeleteError("Object not yet created")

return self.gitlab.delete(self, **kwargs)

@classmethod

def create(cls, gl, data, **kwargs):

"""Create an object.

Args:

gl (gitlab.Gitlab): Gitlab object referencing the GitLab server.

data (dict): The data used to define the object.

Returns:

object: The new object.

Raises:

NotImplementedError: If objects can't be created.

GitlabCreateError: If the server cannot perform the request.

"""

if not cls.canCreate:

raise NotImplementedError

obj = cls(gl, data, **kwargs)

obj.save()

return obj

def __init__(self, gl, data=None, **kwargs):

"""Constructs a new object.

Do not use this method. Use the `get` or `create` class methods

instead.

Args:

gl (gitlab.Gitlab): Gitlab object referencing the GitLab server.

data: If `data` is a dict, create a new object using the

information. If it is an int or a string, get a GitLab object

from an API request.

**kwargs: Additional arguments to send to GitLab.

"""

self._from_api = False

#: (gitlab.Gitlab): Gitlab connection.

self.gitlab = gl

# store the module in which the object has been created (v3/v4) to be

# able to reference other objects from the same module

self._module = importlib.import_module(self.__module__)

if (data is None or isinstance(data, six.integer_types) or

isinstance(data, six.string_types)):

if not self.canGet:

raise NotImplementedError

data = self.gitlab.get(self.__class__, data, **kwargs)

self._from_api = True

# the API returned a list because custom kwargs where used

# instead of the id to request an object. Usually parameters

# other than an id return ambiguous results. However in the

# gitlab universe iids together with a project_id are

# unambiguous for merge requests and issues, too.

# So if there is only one element we can use it as our data

# source.

if 'iid' in kwargs and isinstance(data, list):

if len(data) < 1:

raise GitlabGetError('Not found')

elif len(data) == 1:

data = data[0]

else:

raise GitlabGetError('Impossible! You found multiple'

' elements with the same iid.')

self._set_from_dict(data, **kwargs)

if kwargs:

for k, v in kwargs.items():

# Don't overwrite attributes returned by the server (#171)

if k not in self.__dict__ or not self.__dict__[k]:

self.__dict__[k] = v

# Special handling for api-objects that don't have id-number in api

# responses. Currently only Labels and Files

if not hasattr(self, "id"):

self.id = None

def _set_manager(self, var, cls, attrs):

manager = cls(self.gitlab, self, attrs)

setattr(self, var, manager)

def __getattr__(self, name):

# build a manager if it doesn't exist yet

for var, cls, attrs in self.managers:

if var != name:

continue

# Build the full class path if needed

if isinstance(cls, six.string_types):

cls = getattr(self._module, cls)

self._set_manager(var, cls, attrs)

return getattr(self, var)

raise AttributeError(name)

def __str__(self):

return '%s => %s' % (type(self), str(self.__dict__))

def __repr__(self):

return '<%s %s:%s>' % (self.__class__.__name__,

self.idAttr,

getattr(self, self.idAttr))

def display(self, pretty):

if pretty:

self.pretty_print()

else:

self.short_print()

def short_print(self, depth=0):

"""Print the object on the standard output (verbose).

Args:

depth (int): Used internaly for recursive call.

"""

id = self.__dict__[self.idAttr]

print("%s%s: %s" % (" " * depth * 2, self.idAttr, id))

if self.shortPrintAttr:

print("%s%s: %s" % (" " * depth * 2,

self.shortPrintAttr.replace('_', '-'),

self.__dict__[self.shortPrintAttr]))

@staticmethod

def _get_display_encoding():

return sys.stdout.encoding or sys.getdefaultencoding()

@staticmethod

def _obj_to_str(obj):

if isinstance(obj, dict):

s = ", ".join(["%s: %s" %

(x, GitlabObject._obj_to_str(y))

for (x, y) in obj.items()])

return "{ %s }" % s

elif isinstance(obj, list):

s = ", ".join([GitlabObject._obj_to_str(x) for x in obj])

return "[ %s ]" % s

elif six.PY2 and isinstance(obj, six.text_type):

return obj.encode(GitlabObject._get_display_encoding(), "replace")

else:

return str(obj)

def pretty_print(self, depth=0):

"""Print the object on the standard output (verbose).

Args:

depth (int): Used internaly for recursive call.

"""

id = self.__dict__[self.idAttr]

print("%s%s: %s" % (" " * depth * 2, self.idAttr, id))

for k in sorted(self.__dict__.keys()):

if k in (self.idAttr, 'id', 'gitlab'):

continue

if k[0] == '_':

continue

v = self.__dict__[k]

pretty_k = k.replace('_', '-')

if six.PY2:

pretty_k = pretty_k.encode(

GitlabObject._get_display_encoding(), "replace")

if isinstance(v, GitlabObject):

if depth == 0:

print("%s:" % pretty_k)

v.pretty_print(1)

else:

print("%s: %s" % (pretty_k, v.id))

elif isinstance(v, BaseManager):

continue

else:

if hasattr(v, __name__) and v.__name__ == 'Gitlab':

continue

v = GitlabObject._obj_to_str(v)

print("%s%s: %s" % (" " * depth * 2, pretty_k, v))

def json(self):

"""Dump the object as json.

Returns:

str: The json string.

"""

return json.dumps(self, cls=jsonEncoder)

def as_dict(self):

"""Dump the object as a dict."""

return {k: v for k, v in six.iteritems(self.__dict__)

if (not isinstance(v, BaseManager) and not k[0] == '_')}

def __eq__(self, other):

if type(other) is type(self):

return self.as_dict() == other.as_dict()

return False

def __ne__(self, other):

return not self.__eq__(other)

class RESTObject(object):

"""Represents an object built from server data.

It holds the attributes know from the server, and the updated attributes in

another. This allows smart updates, if the object allows it.

You can redefine ``_id_attr`` in child classes to specify which attribute

must be used as uniq ID. ``None`` means that the object can be updated

without ID in the url.

"""

_id_attr = 'id'

def __init__(self, manager, attrs):

self.__dict__.update({

'manager': manager,

'_attrs': attrs,

'_updated_attrs': {},

'_module': importlib.import_module(self.__module__)

})

self.__dict__['_parent_attrs'] = self.manager.parent_attrs

self._create_managers()

def __getattr__(self, name):

try:

return self.__dict__['_updated_attrs'][name]

except KeyError:

try:

value = self.__dict__['_attrs'][name]

# If the value is a list, we copy it in the _updated_attrs dict

# because we are not able to detect changes made on the object

# (append, insert, pop, ...). Without forcing the attr

# creation __setattr__ is never called, the list never ends up

# in the _updated_attrs dict, and the update() and save()

# method never push the new data to the server.

# See https://github.com/python-gitlab/python-gitlab/issues/306

# note: _parent_attrs will only store simple values (int) so we

# don't make this check in the next except block.

if isinstance(value, list):

self.__dict__['_updated_attrs'][name] = value[:]

return self.__dict__['_updated_attrs'][name]

return value

except KeyError:

try:

return self.__dict__['_parent_attrs'][name]

except KeyError:

raise AttributeError(name)

def __setattr__(self, name, value):

self.__dict__['_updated_attrs'][name] = value

def __str__(self):

data = self._attrs.copy()

data.update(self._updated_attrs)

return '%s => %s' % (type(self), data)

def __repr__(self):

if self._id_attr:

return '<%s %s:%s>' % (self.__class__.__name__,

self._id_attr,

self.get_id())

else:

return '<%s>' % self.__class__.__name__

def _create_managers(self):

managers = getattr(self, '_managers', None)

if managers is None:

return

for attr, cls_name in self._managers:

cls = getattr(self._module, cls_name)

manager = cls(self.manager.gitlab, parent=self)

self.__dict__[attr] = manager

def _update_attrs(self, new_attrs):

self.__dict__['_updated_attrs'] = {}

self.__dict__['_attrs'].update(new_attrs)

def get_id(self):

"""Returns the id of the resource."""

if self._id_attr is None:

return None

return getattr(self, self._id_attr)

@property

def attributes(self):

d = self.__dict__['_updated_attrs'].copy()

d.update(self.__dict__['_attrs'])

d.update(self.__dict__['_parent_attrs'])

return d

class RESTObjectList(object):

"""Generator object representing a list of RESTObject's.

This generator uses the Gitlab pagination system to fetch new data when

required.

Note: you should not instanciate such objects, they are returned by calls

to RESTManager.list()

Args:

manager: Manager to attach to the created objects

obj_cls: Type of objects to create from the json data

_list: A GitlabList object

"""

def __init__(self, manager, obj_cls, _list):

"""Creates an objects list from a GitlabList.

You should not create objects of this type, but use managers list()

methods instead.

Args:

manager: the RESTManager to attach to the objects

obj_cls: the class of the created objects

_list: the GitlabList holding the data

"""

self.manager = manager

self._obj_cls = obj_cls

self._list = _list

def __iter__(self):

return self

def __len__(self):

return len(self._list)

def __next__(self):

return self.next()

def next(self):

data = self._list.next()

return self._obj_cls(self.manager, data)

@property

def current_page(self):

"""The current page number."""

return self._list.current_page

@property

def prev_page(self):

"""The next page number.

If None, the current page is the last.

"""

return self._list.prev_page

@property

def next_page(self):

"""The next page number.

If None, the current page is the last.

"""

return self._list.next_page

@property

def per_page(self):

"""The number of items per page."""

return self._list.per_page

@property

def total_pages(self):

"""The total number of pages."""

return self._list.total_pages

@property

def total(self):

"""The total number of items."""

return self._list.total

class RESTManager(object):

"""Base class for CRUD operations on objects.

Derivated class must define ``_path`` and ``_obj_cls``.

``_path``: Base URL path on which requests will be sent (e.g. '/projects')

``_obj_cls``: The class of objects that will be created

"""

_path = None

_obj_cls = None

def __init__(self, gl, parent=None):

"""REST manager constructor.

Args:

gl (Gitlab): :class:`~gitlab.Gitlab` connection to use to make

requests.

parent: REST object to which the manager is attached.

"""

self.gitlab = gl

self._parent = parent # for nested managers

self._computed_path = self._compute_path()

@property

def parent_attrs(self):

return self._parent_attrs

def _compute_path(self, path=None):

self._parent_attrs = {}

if path is None:

path = self._path

if self._parent is None or not hasattr(self, '_from_parent_attrs'):

return path

data = {self_attr: getattr(self._parent, parent_attr)

for self_attr, parent_attr in self._from_parent_attrs.items()}

self._parent_attrs = data

return path % data

@property

def path(self):

return self._computed_path

python-gitlab/gitlab/base.py at master · nathschmidt/python-gitlab · GitHub

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