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loader.py
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loader.py
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from ctypes.util import find_library
import ctypes
import sys
import glob
import os.path
def _lib_candidates():
yield find_library('magic')
if sys.platform == 'darwin':
paths = [
'/opt/local/lib',
'/usr/local/lib',
'/opt/homebrew/lib',
] + glob.glob('/usr/local/Cellar/libmagic/*/lib')
for i in paths:
yield os.path.join(i, 'libmagic.dylib')
elif sys.platform in ('win32', 'cygwin'):
prefixes = ['libmagic', 'magic1', 'cygmagic-1', 'libmagic-1', 'msys-magic-1']
for i in prefixes:
# find_library searches in %PATH% but not the current directory,
# so look for both
yield './%s.dll' % (i,)
yield find_library(i)
elif sys.platform == 'linux':
# This is necessary because alpine is bad
yield 'libmagic.so.1'
def load_lib():
for lib in _lib_candidates():
# find_library returns None when lib not found
if lib is None:
continue
try:
return ctypes.CDLL(lib)
except OSError:
pass
else:
# It is better to raise an ImportError since we are importing magic module
raise ImportError('failed to find libmagic. Check your installation')