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import ctypes
import sys
def load_lib():
libmagic = None
# Let's try to find magic or magic1
dll = ctypes.util.find_library('magic') \
or ctypes.util.find_library('magic1') \
or ctypes.util.find_library('cygmagic-1') \
or ctypes.util.find_library('libmagic-1') \
or ctypes.util.find_library('msys-magic-1') # for MSYS2
# necessary because find_library returns None if it doesn't find the library
if dll:
libmagic = ctypes.CDLL(dll)
if not libmagic or not libmagic._name:
windows_dlls = ['magic1.dll', 'cygmagic-1.dll', 'libmagic-1.dll', 'msys-magic-1.dll']
platform_to_lib = {'darwin': ['/opt/local/lib/libmagic.dylib',
'/usr/local/lib/libmagic.dylib'] +
# Assumes there will only be one version installed
glob.glob('/usr/local/Cellar/libmagic/*/lib/libmagic.dylib'), # flake8:noqa
'win32': windows_dlls,
'cygwin': windows_dlls,
'linux': ['libmagic.so.1'],
# fallback for some Linuxes (e.g. Alpine) where library search does not work # flake8:noqa
}
platform = 'linux' if sys.platform.startswith('linux') else sys.platform
for dll in platform_to_lib.get(platform, []):
try:
libmagic = ctypes.CDLL(dll)
break
except OSError:
pass
if not libmagic or not libmagic._name:
# It is better to raise an ImportError since we are importing magic module
raise ImportError('failed to find libmagic. Check your installation')
return libmagic
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