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Package resource API
--------------------
A resource is a logical file contained within a package, or a logical
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The package resource API is designed to work with normal filesystem packages,
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print('Could not load', errors)
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directories. The `full_env`, if supplied, should be an ``Environment``
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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.
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that were loadable, along with any other distributions that are needed
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unspecified, it defaults to the current platform. `python` is an
optional string naming the desired version of Python (e.g. ``'3.3'``);
it defaults to the current version.
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Any distributions found are added to the environment.
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If the default extraction path is overridden and set to an insecure
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Nr )r forcer r r r[ s z!ResourceManager.cleanup_resources)F)r r r r r& r rT rU rR rQ rP rS r. r3 staticmethodr1 rB rZ r[ r r r r r_ Y s c C s t jjdptjddS )z
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Build a dictionary similar to the zipimport directory
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Load a manifest at path or return a suitable manifest already loaded.
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namedtupler| rz r r r r r{ % s r{ c @ s e Zd ZdZdZe Zdd Zdd Zdd Z e
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C sn || j krDx*| j | D ]}| j|tjj||}qW tjj|S | j| j| \}}tsdt dy|j
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Return True if the file_path is current for this zip_path
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zZipProvider._is_currentc C sB | j d kr<g }x&dD ] }| j|r|j| j| qW || _ | j S )Nnative_libs.txteager_resources.txt)r r )r r r r )r r r r r r r s
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zZipProvider._hasc C s | j || j kS )N)r r )r r r r r rW s zZipProvider._isdirc C s t | j j| j|f S )N)r r r r )r r r r r rX s zZipProvider._listdirc C s | j | j| j|S )N)r rO rk )r r r r r r s zZipProvider._eager_to_zipc C s | j | j| j|S )N)r rO rN )r r r r r r s z ZipProvider._resource_to_zip)r r r r r r{ r r r r r r r rD r r r r r rS rW rX r r r r r r r 9 s$
7 c @ s8 e Zd ZdZdd Zdd Zdd Zdd Zd
d Zd S )
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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
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zFileMetadata.get_metadatac C s2 dj d}||kr.d}|jf t }tj| d S )Ns �zutf-8z2{self.path} could not be properly decoded in UTF-8)rU r r r: r; )r r Zreplacement_charr, r> r r r r s
z!FileMetadata._warn_on_replacementc C s t | j|S )N)rm r )r r r r r r s z FileMetadata.get_metadata_linesN) r r r r r r r r r r r r r r| 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 )N)rN rT )r r rT r r r r # s zPathMetadata.__init__N)r r r r r r r r r r} s c @ s e Zd ZdZdd ZdS )r~ z Metadata provider for .egg filesc C sD |j tj | _|| _|jr0tjj|j |j| _n|j | _| j dS )z-Create a metadata provider from a zipimporterN)
r r rv r r prefixr rA rN rh )r importerr r r r + s zEggMetadata.__init__N)r r r r r 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
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importer_typeZdistribution_finderr r r r : s c C s t | }tt|}||| |S )z.Yield distributions accessible via `path_item`)r r r ) path_itemonlyr finderr r r rY D s
c c s | j jdrdS t| }|jdr2tj||dV |r:dS x|jdD ]}t|rtj j
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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 jj| \} }tj| jd|g}dd |D S )z6
Parse each component of the filename
rE c S s g | ]}t jj|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_versionT)r2 r )sorted)r2 r r r r _by_version_descendingp s r c
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