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63 lines
1.8 KiB
63 lines
1.8 KiB
5 years ago
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import io
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import os
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import zipfile
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from .distribution import Distribution
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from .distribution import must_decode
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from .distribution import parse
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class Wheel(Distribution):
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def __init__(self, filename, metadata_version=None):
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self.filename = filename
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self.metadata_version = metadata_version
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self.extractMetadata()
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def read(self):
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fqn = os.path.abspath(os.path.normpath(self.filename))
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if not os.path.exists(fqn):
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raise ValueError('No such file: %s' % fqn)
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if fqn.endswith('.whl'):
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archive = zipfile.ZipFile(fqn)
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names = archive.namelist()
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def read_file(name):
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return archive.read(name)
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close = archive.close
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elif fqn.endswith('.dist-info'):
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names = [os.path.join(fqn, p) for p in os.listdir(fqn)]
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def read_file(name):
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with io.open(name, mode='rb') as inf:
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return inf.read()
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close = lambda : None
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else:
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raise ValueError('Not a known wheel archive format or '
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'installed .dist-info: %s' % fqn)
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try:
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tuples = [x.split('/') for x in names if 'METADATA' in x]
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schwarz = sorted([(len(x), x) for x in tuples])
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for path in [x[1] for x in schwarz]:
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candidate = '/'.join(path)
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data = read_file(candidate)
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if b'Metadata-Version' in data:
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return data
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finally:
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close()
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raise ValueError('No METADATA in archive: %s' % fqn)
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def parse(self, data):
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super(Wheel, self).parse(data)
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fp = io.StringIO(must_decode(data))
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msg = parse(fp)
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self.description = msg.get_payload()
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