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55 lines
2.0 KiB
55 lines
2.0 KiB
5 years ago
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import glob
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import io
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import os
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import sys
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import warnings
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from .distribution import Distribution
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from ._compat import STRING_TYPES
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class Installed(Distribution):
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def __init__(self, package, metadata_version=None):
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if isinstance(package, STRING_TYPES):
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self.package_name = package
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try:
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__import__(package)
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except ImportError:
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package = None
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else:
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package = sys.modules[package]
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else:
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self.package_name = package.__name__
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self.package = package
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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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opj = os.path.join
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if self.package is not None:
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package = self.package.__package__
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if package is None:
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package = self.package.__name__
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pattern = '%s*.egg-info' % package
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file = getattr(self.package, '__file__', None)
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if file is not None:
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candidates = []
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def _add_candidate(where):
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candidates.extend(glob.glob(where))
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for entry in sys.path:
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if file.startswith(entry):
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_add_candidate(opj(entry, 'EGG-INFO')) # egg?
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_add_candidate(opj(entry, pattern)) # dist-installed?
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dir, name = os.path.split(self.package.__file__)
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_add_candidate(opj(dir, pattern))
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_add_candidate(opj(dir, '..', pattern))
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for candidate in candidates:
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if os.path.isdir(candidate):
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path = opj(candidate, 'PKG-INFO')
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else:
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path = candidate
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if os.path.exists(path):
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with io.open(path, errors='ignore') as f:
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return f.read()
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warnings.warn('No PKG-INFO found for package: %s' % self.package_name)
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