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import glob
import io
import os
import sys
import warnings
from .distribution import Distribution
class Installed(Distribution):
def __init__(self, package, metadata_version=None):
if isinstance(package, str):
self.package_name = package
try:
__import__(package)
except ImportError:
package = None
else:
package = sys.modules[package]
else:
self.package_name = package.__name__
self.package = package
self.metadata_version = metadata_version
self.extractMetadata()
def read(self):
opj = os.path.join
if self.package is not None:
package = self.package.__package__
if package in ('', None):
package = self.package.__name__
egg_pattern = '%s*.egg-info' % package
dist_pattern = '%s*.dist-info' % package
pkg_file = getattr(self.package, '__file__', None)
if pkg_file is not None:
candidates = []
def _add_candidate(where):
candidates.extend(glob.glob(where))
for entry in sys.path:
if pkg_file.startswith(entry):
_add_candidate(opj(entry, 'EGG-INFO')) # egg?
_add_candidate(opj(entry, egg_pattern))
_add_candidate(opj(entry, dist_pattern))
dir, name = os.path.split(self.package.__file__)
_add_candidate(opj(dir, egg_pattern))
_add_candidate(opj(dir, '..', egg_pattern))
_add_candidate(opj(dir, dist_pattern))
_add_candidate(opj(dir, '..', dist_pattern))
for candidate in candidates:
if os.path.isdir(candidate):
if candidate.lower().endswith("egg-info"):
path = opj(candidate, 'PKG-INFO')
elif candidate.endswith("dist-info"):
path = opj(candidate, 'METADATA')
else: # pragma: NO COVER
continue
else:
path = candidate
if os.path.exists(path):
with io.open(path, errors='ignore') as f:
return f.read()
warnings.warn('No PKG-INFO found for package: %s' % self.package_name)
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