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Package resource API
--------------------
A resource is a logical file contained within a package, or a logical
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path separator is. Do not use os.path operations to manipulate resource
names being passed into the API.
The package resource API is designed to work with normal filesystem packages,
.egg files, and unpacked .egg files. It can also work in a limited way with
.zip files and with custom PEP 302 loaders that support the ``get_data()``
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4 // D FF4LLLL X $ $EBJ&& U### j r c | j |g | j | t |d D ]}| ||d dS )a Add a path item to ``.entries``, finding any distributions on it
``find_distributions(entry, True)`` is used to find distributions
corresponding to the path entry, and they are added. `entry` is
always appended to ``.entries``, even if it is already present.
(This is because ``sys.path`` can contain the same value more than
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If there is an active distribution for the requested project, this
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`req`. But, if there is an active distribution for the project and it
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s r z/WorkingSet.iter_entry_points.. sq
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+d?? !DI +c****
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|< |j |vr| |j |j |vr| |j | | dS )a Add `dist` to working set, associated with `entry`
If `entry` is unspecified, it defaults to the ``.location`` of `dist`.
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set's ``.entries`` (if it wasn't already present).
`dist` is only added to the working set if it's for a project that
doesn't already have a distribution in the set, unless `replace=True`.
If it's added, any callbacks registered with the ``subscribe()`` method
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| | j | j | |< -d|| < ||S )a List all distributions needed to (recursively) meet `requirements`
`requirements` must be a sequence of ``Requirement`` objects. `env`,
if supplied, should be an ``Environment`` instance. If
not supplied, it defaults to all distributions available within any
entry or distribution in the working set. `installer`, if supplied,
will be invoked with each requirement that cannot be met by an
already-installed distribution; it should return a ``Distribution`` or
``None``.
Unless `replace_conflicting=True`, raises a VersionConflict exception
if
any requirements are found on the path that have the correct name but
the wrong version. Otherwise, if an `installer` is supplied it will be
invoked to obtain the correct version of the requirement and activate
it.
`extras` is a list of the extras to be used with these requirements.
This is important because extra requirements may look like `my_req;
extra = "my_extra"`, which would otherwise be interpreted as a purely
optional requirement. Instead, we want to be able to assert that these
requirements are truly required.
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n$# t $ r}||| < |rY d}~Y d}~ nd}~ww xY wt | }| ||fS )as Find all activatable distributions in `plugin_env`
Example usage::
distributions, errors = working_set.find_plugins(
Environment(plugin_dirlist)
)
# add plugins+libs to sys.path
map(working_set.add, distributions)
# display errors
print('Could not load', errors)
The `plugin_env` should be an ``Environment`` instance that contains
only distributions that are in the project's "plugin directory" or
directories. The `full_env`, if supplied, should be an ``Environment``
contains all currently-available distributions. If `full_env` is not
supplied, one is created automatically from the ``WorkingSet`` this
method is called on, which will typically mean that every directory on
``sys.path`` will be scanned for distributions.
`installer` is a standard installer callback as used by the
``resolve()`` method. The `fallback` flag indicates whether we should
attempt to resolve older versions of a plugin if the newest version
cannot be resolved.
This method returns a 2-tuple: (`distributions`, `error_info`), where
`distributions` is a list of the distributions found in `plugin_env`
that were loadable, along with any other distributions that are needed
to resolve their dependencies. `error_info` is a dictionary mapping
unloadable plugin distributions to an exception instance describing the
error that occurred. Usually this will be a ``DistributionNotFound`` or
``VersionConflict`` instance.
N)
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`requirements` must be a string or a (possibly-nested) sequence
thereof, specifying the distributions and versions required. The
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activated to fulfill the requirements; all relevant distributions are
included, even if they were already activated in this working set.
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> > >+ + +" B 9=26Z Z Z Zz GKR) R) R) R)h
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Map each requirement to the extras that demanded it.
Nc fd| d |pdz D }j pt | S )z
Evaluate markers for req against each extra that
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Zd ZdS )ru z5Searchable snapshot of distributions on a search pathNc Z i | _ || _ || _ | | dS )a! Snapshot distributions available on a search path
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`search_path` should be a sequence of ``sys.path`` items. If not
supplied, ``sys.path`` is used.
`platform` is an optional string specifying the name of the platform
that platform-specific distributions must be compatible with. If
unspecified, it defaults to the current platform. `python` is an
optional string naming the desired version of Python (e.g. ``'3.6'``);
it defaults to the current version.
You may explicitly set `platform` (and/or `python`) to ``None`` if you
wish to map *all* distributions, not just those compatible with the
running platform or Python version.
N)_distmaprX pythonscan)r search_pathrX r s r r? zEnvironment.__init__ s1 &
+ r c ~ | j du p|j du p|j | j k }|ot |j | j S )zIs distribution `dist` acceptable for this environment?
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`search_path` should be a sequence of ``sys.path`` items. If not
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N)rW r rq rJ )r r r_ r s r r zEnvironment.scan sW (K D*400
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Uses case-insensitive `project_name` comparison, assuming all the
project's distributions use their project's name converted to all
lowercase as their key.
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environment that meets the ``Requirement`` in `req`. If no suitable
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If the default extraction path is overridden and set to an insecure
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details.)
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