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Package resource API
--------------------
A resource is a logical file contained within a package, or a logical
subdirectory thereof. The package resource API expects resource names
to have their path parts separated with ``/``, *not* whatever the local
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()``
method.
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WorkingSetResourceManager Distribution Requirement
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``None``.
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if
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map(working_set.add, distributions)
# display errors
print('Could not load', errors)
The `plugin_env` should be an ``Environment`` instance that contains
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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
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attempt to resolve older versions of a plugin if the newest version
cannot be resolved.
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that were loadable, along with any other distributions that are needed
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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'``);
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active in the specified `working_set`.) If a suitable distribution
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environment that meets the ``Requirement`` in `req`. If no suitable
distribution is found, and `installer` is supplied, then the result of
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Perhaps your account does not have write access to this directory?
You can change the cache directory by setting the PYTHON_EGG_CACHE
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N)
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rL | Y nX | | d| j |< |S )a Return absolute location in cache for `archive_name` and `names`
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including its ".egg" extension. `names`, if provided, should be a
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If the default extraction path is overridden and set to an insecure
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that are already in the filesystem.
`tempname` is the current (temporary) name of the file, and `filename`
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platform-specific fallbacks. See that routine's documentation for more
details.)
Resources are extracted to subdirectories of this path based upon
information given by the ``IResourceProvider``. You may set this to a
temporary directory, but then you must call ``cleanup_resources()`` to
delete the extracted files when done. There is no guarantee that
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manager once resources have been extracted, unless you first call
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z5Can't change extraction path, files already extractedN)rf rH rj r r r r r r^ s
z#ResourceManager.set_extraction_pathFc C s dS )aB
Delete all extracted resource files and directories, returning a list
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Nr )r forcer r r r_ s z!ResourceManager.cleanup_resources)r )F)r r r r rj r rX rY rV rU rT rW rs r{ staticmethodrv r r^ r_ r r r r rc W s
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C sH z t | W n6 tk
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C sL zt j| }| W S t jjk
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|rt |}| }W 5 Q R X t
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t|
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Nzscripts/z<Script {script!r} not found in metadata at {self.egg_info!r}z
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zNullProvider.run_scriptc C s t dd S Nz9Can't perform this operation for unregistered loader typeNotImplementedErrorr r r r r s zNullProvider._hasc C s t dd S r r r r r r r s zNullProvider._isdirc C s t dd S r r r r r r r s zNullProvider._listdirc C s* | | |r&tjj|f|d S |S )N/)_validate_resource_pathr r rE r )r baser r r r r s
zNullProvider._fnc C sp t jj| tjkp&t| p&t| }|s0dS d}t| rPt| sPt|t j
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Validate the resource paths according to the docs.
https://setuptools.readthedocs.io/en/latest/pkg_resources.html#basic-resource-access
>>> warned = getfixture('recwarn')
>>> warnings.simplefilter('always')
>>> vrp = NullProvider._validate_resource_path
>>> vrp('foo/bar.txt')
>>> bool(warned)
False
>>> vrp('../foo/bar.txt')
>>> bool(warned)
True
>>> warned.clear()
>>> vrp('/foo/bar.txt')
>>> bool(warned)
True
>>> vrp('foo/../../bar.txt')
>>> bool(warned)
True
>>> warned.clear()
>>> vrp('foo/f../bar.txt')
>>> bool(warned)
False
Windows path separators are straight-up disallowed.
>>> vrp(r'\foo/bar.txt')
Traceback (most recent call last):
...
ValueError: Use of .. or absolute path in a resource path is not allowed.
>>> vrp(r'C:\foo/bar.txt')
Traceback (most recent call last):
...
ValueError: Use of .. or absolute path in a resource path is not allowed.
Blank values are allowed
>>> vrp('')
>>> bool(warned)
False
Non-string values are not.
>>> vrp(None)
Traceback (most recent call last):
...
AttributeError: ...
Nz=Use of .. or absolute path in a resource path is not allowed.r z/ and will raise exceptions in a future release.r
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zNullProvider._get) r r r r egg_namer r r r r r r r r r r rY r rW r rM r r r r r r r r r r r r Z s2
Jc c s, d}| |kr(| V | }t j| \} }qdS )z2
yield all parents of path including path
N)r r r )r lastr r r r _parents s
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_setup_prefixr r r r r * s zEggProvider.__init__c C s, t tt| j}t|d }|o&| | d S r )filter _is_egg_pathr r next_set_egg)r eggsZeggr r r r . s
zEggProvider._setup_prefixc C s( t j|| _t j|d| _|| _d S )NEGG-INFO)r r basenamer rE r egg_rootr r r r r 5 s zEggProvider._set_eggN)r r r r r r r r r r r r ' s c @ sD e Zd ZdZdd Zdd Zdd Zdd Zd
d Ze d d
Z
dS )r z6Provides access to package resources in the filesystemc C s t j|S r )r r r r r r r r > s zDefaultProvider._hasc C s t j|S r )r r r r r r r r A s zDefaultProvider._isdirc C s
t |S r )r listdirr r r r r D s zDefaultProvider._listdirc C s t | | j|dS Nrb)r r r r r r r r G s z#DefaultProvider.get_resource_streamc
C s* t |d}| W 5 Q R S Q R X d S r )r r )r r streamr r r r J s zDefaultProvider._getc C s, d}|D ] }t t|td }t|| qd S )N)SourceFileLoaderSourcelessFileLoader)r importlib_machinerytyper )r loader_namesr
loader_clsr r r _registerN s zDefaultProvider._registerN) r r r r r r r r r rC r r r r r r ; s c @ s8 e Zd ZdZdZdd ZZdd Zdd Zd d
Z dS ) r z.Provider that returns nothing for all requestsNc C s dS NFr r r r r r; ^ r< zEmptyProvider.<lambda>c C s dS Nr r r r r r r ` s zEmptyProvider._getc C s g S r r r r r r r c s zEmptyProvider._listdirc C s d S r r r r r r r f s zEmptyProvider.__init__)
r r r r r r r r r r r r r r r Y s c @ s e Zd ZdZedd ZeZdS ) ZipManifestsz
zip manifest builder
c
s@ t |, fdd D }t|W 5 Q R S Q R X dS )a
Build a dictionary similar to the zipimport directory
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r zfiler r r | s z%ZipManifests.build.<locals>.<genexpr>N)zipfileZipFilenamelistr )r r r& r r r buildr s
zZipManifests.buildN)r r r r rC r loadr r r r r m s
r c @ s$ e Zd ZdZeddZdd ZdS )MemoizedZipManifestsz%
Memoized zipfile manifests.
manifest_modzmanifest mtimec C sR t j|}t |j}|| ks.| | j|krH| |}| ||| |< | | jS )zW
Load a manifest at path or return a suitable manifest already loaded.
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zMemoizedZipManifests.loadN)r r r r r
namedtupler r r r r r r s r c @ s e Zd ZdZdZe Zdd Zdd Zdd Z e
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Z d d Z e
d
d Zdd Zdd Zdd Zdd Zdd Zdd Zdd Zd d Zd d ZdS )!r z"Resource support for zips and eggsNc C s t | | | jjtj | _d S r )r r r archiver r zip_prer r r r r s zZipProvider.__init__c C sP | tj}|| jjkr dS || jr:|t| jd S td|| jf d S )Nr %s is not a subpath of %s) rstripr r r r r r r AssertionErrorr fspathr r r
_zipinfo_name s zZipProvider._zipinfo_namec C sP | j | }|| jtj r:|t| jd d tjS td|| jf d S )Nr r )r r r r r r r r )r zip_pathr r r r _parts s
zZipProvider._partsc C s | j | jjS r )_zip_manifestsr r r r r r r zipinfo s zZipProvider.zipinfoc C s\ | j std| |}| }d| ||krP|D ]}| || | q8| ||S )Nz5resource_filename() only supported for .egg, not .zipr )r r _resource_to_zip_get_eager_resourcesrE r _extract_resource
_eager_to_zip)r r r r eagersr r r r r s
z!ZipProvider.get_resource_filenamec C s" | j }| jd }t|}||fS )N)r r r ) file_size date_timetimemktime)zip_statsizer timestampr r r _get_date_and_size s
z ZipProvider._get_date_and_sizec
C sx || kr@| | D ]}| |tj||}qtj|S | | j| \}}ts`t dz|
| j | |}|
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rN tj|rH|
||r | Y W S tjdkrHt| t| | | Y W S Y nX W n tjk
rr | Y nX |S )Nz>"os.rename" and "os.unlink" are not supported on this platformz .$extract)dirr| )_indexr r r rE r r r
WRITE_SUPPORTIOErrorr{ r r _is_current_mkstempwriter r closer r r errorisfiler r rs )
r r r r r r r real_pathoutftmpnamr r r r sN
z ZipProvider._extract_resourcec C sx | | j| \}}tj|s$dS t|}|j|ksB|j|krFdS | j |}t
|d}| }W 5 Q R X ||kS )zK
Return True if the file_path is current for this zip_path
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zZipProvider._is_currentc C s> | j d kr8g }dD ] }| |r|| | q|| _ | j S )N)znative_libs.txtzeager_resources.txt)r r r& r )r r r r r r r s
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r i }| jD ]V}|tj}|r"tj|d d }||krh|| |d q"q2| g||< q2q"|| _ | Y S X d S )Nr ) _dirindexAttributeErrorr r r r rE r r" )r indr partsparentr r r r ' s
zZipProvider._indexc C s | |}|| jkp || kS r )r r r )r r r r r r r 8 s
zZipProvider._hasc C s | || kS r )r r r r r r r < s zZipProvider._isdirc C s t | | |dS Nr )r r r r r r r r r ? s zZipProvider._listdirc C s | | | j|S r )r r r r r r r r
B s zZipProvider._eager_to_zipc C s | | | j|S r )r r r r r r r r
E s z ZipProvider._resource_to_zip)r r r r r r r r r r r r r r r r r r r r r r r
r
r r r r r s(
7 c @ s@ e Zd ZdZdd Zdd Zdd Zdd Zd
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Z dS )r a* Metadata handler for standalone PKG-INFO files
Usage::
metadata = FileMetadata("/path/to/PKG-INFO")
This provider rejects all data and metadata requests except for PKG-INFO,
which is treated as existing, and will be the contents of the file at
the provided location.
c C s
|| _ d S r r r r r r r X s zFileMetadata.__init__c C s | j S r r/ r r r r r [ s z FileMetadata._get_metadata_pathc C s |dkot j| jS )NPKG-INFO)r r r r r r r r ^ s zFileMetadata.has_metadatac C sD |dkrt dtj| jddd}| }W 5 Q R X | | |S )Nr0 z(No metadata except PKG-INFO is availabler r )encodingerrors)r r r r r _warn_on_replacement)r r r' metadatar r r r a s
zFileMetadata.get_metadatac C s, d}||kr(d}|j f t }t| d S )Nu �z2{self.path} could not be properly decoded in UTF-8)r r r r )r r4 replacement_charrq r r r r r3 j s
z!FileMetadata._warn_on_replacementc C s t | |S r r r r r r r q s z FileMetadata.get_metadata_linesN)
r r r r r r r r r3 r r r r r r L s c @ s e Zd ZdZdd ZdS )r as Metadata provider for egg directories
Usage::
# Development eggs:
egg_info = "/path/to/PackageName.egg-info"
base_dir = os.path.dirname(egg_info)
metadata = PathMetadata(base_dir, egg_info)
dist_name = os.path.splitext(os.path.basename(egg_info))[0]
dist = Distribution(basedir, project_name=dist_name, metadata=metadata)
# Unpacked egg directories:
egg_path = "/path/to/PackageName-ver-pyver-etc.egg"
metadata = PathMetadata(egg_path, os.path.join(egg_path,'EGG-INFO'))
dist = Distribution.from_filename(egg_path, metadata=metadata)
c C s || _ || _d S r )r r )r r r r r r r s zPathMetadata.__init__Nr r r r r r r r r r u s c @ s e Zd ZdZdd ZdS )r z Metadata provider for .egg filesc C sD |j tj | _|| _|jr0tj|j |j| _n|j | _| dS )z-Create a metadata provider from a zipimporterN)
r r r r r prefixr rE r r )r importerr r r r s zEggMetadata.__init__Nr6 r r r r r s r _distribution_findersc C s |t | < dS )ax Register `distribution_finder` to find distributions in sys.path items
`importer_type` is the type or class of a PEP 302 "Importer" (sys.path item
handler), and `distribution_finder` is a callable that, passed a path
item and the importer instance, yields ``Distribution`` instances found on
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importer_typedistribution_finderr r r r s c C s t | }tt|}||| |S )z.Yield distributions accessible via `path_item`)r r r: ) path_itemonlyr8 finderr r r r] s
c c s | j drdS t| }|dr2tj||dV |r:dS |dD ]|}t|rtj
||}t t
||}|D ]
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|}||_t|||V qDdS )z@
Find eggs in zip files; possibly multiple nested eggs.
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from_filenamerW r r r rE find_eggs_in_zip zipimport zipimporterrS r
from_location) r8 r= r> r4 subitemsubpathr r submetar r r rE s$
rE c C s dS r. r )r8 r= r> r r r find_nothing s rL c C s dd }t | |ddS )aL
Given a list of filenames, return them in descending order
by version number.
>>> names = 'bar', 'foo', 'Python-2.7.10.egg', 'Python-2.7.2.egg'
>>> _by_version_descending(names)
['Python-2.7.10.egg', 'Python-2.7.2.egg', 'foo', 'bar']
>>> names = 'Setuptools-1.2.3b1.egg', 'Setuptools-1.2.3.egg'
>>> _by_version_descending(names)
['Setuptools-1.2.3.egg', 'Setuptools-1.2.3b1.egg']
>>> names = 'Setuptools-1.2.3b1.egg', 'Setuptools-1.2.3.post1.egg'
>>> _by_version_descending(names)
['Setuptools-1.2.3.post1.egg', 'Setuptools-1.2.3b1.egg']
c S s2 t j| \} }t| d|g}dd |D S )z6
Parse each component of the filename
r c S s g | ]}t j|qS r )r r r )r
partr r r
<listcomp> s z?_by_version_descending.<locals>._by_version.<locals>.<listcomp>)r r splitext itertoolschainr )r extr, r r r _by_version s z+_by_version_descending.<locals>._by_versionTrW )sorted)rx rS r r r _by_version_descending s rU c
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r5 c C s< t tt|dt|}|D ]}|| kr | | S q dS )z2Return an adapter factory for `ob` from `registry`r N)r5 inspectgetmror r )registryr5 r tr r r r Q s r c C s t j| }t j|dd dS )z1Ensure that the parent directory of `path` existsT)exist_okN)r r r makedirs)r r r r r rw Y s c C sX t s tdt| \}}|rT|rTt|sTt| zt|d W n tk
rR Y nX dS )z/Sandbox-bypassing version of ensure_directory()z*"os.mkdir" not supported on this platform.i N)r r r r rt r FileExistsError)r r r r r r rt _ s rt c c sv d}g }t | D ]V}|dr\|drP|s0|r:||fV |dd }g }qftd|q|| q||fV dS )as Split a string or iterable thereof into (section, content) pairs
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N[]r r zInvalid section heading)rq r rC rq rH r )r sectioncontentrr r r r rr l s
c O s* t j}ztt _tj| |W S |t _X d S r )r r os_opentempfilemkstemp)r: r# old_openr r r r s
r r} )categoryr c O s | || | S r r )r' r: r r r r _call_aside s
rF c s. t | d< | fddt D dS )z=Set up global resource manager (deliberately not state-saved)_managerc 3 s& | ] }| d s|t |fV qdS r )r r r r r r r s
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Prepare the master working set and make the ``require()``
API available.
This function has explicit effects on the global state
of pkg_resources. It is intended to be invoked once at
the initialization of this module.
Invocation by other packages is unsupported and done
at their own risk.
r3 )r[ c s s | ]}|j d dV qdS )Fr Nr )r
r r r r r s z1_initialize_master_working_set.<locals>.<genexpr>c S s | j ddS )NTr rJ r r r r r; r< z0_initialize_master_working_set.<locals>.<lambda>F)r@ N)rb r r$ rL rS rA rM r r r r3 r rC r r r r )r[ rL rS r\ rM r r r r _initialize_master_working_set s"
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Base class for warning about deprecations in ``pkg_resources``
This class is not derived from ``DeprecationWarning``, and as such is
visible by default.
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