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import json
import os
import subprocess
from typing import Dict, Union, Set
from . import abstract
# Make pyflakes happy
assert Set
class ExiftoolParser(abstract.AbstractParser):
""" Exiftool is often the easiest way to get all the metadata
from a import file, hence why several parsers are re-using its `get_meta`
method.
"""
meta_whitelist = set() # type: Set[str]
def get_meta(self) -> Dict[str, Union[str, dict]]:
out = subprocess.check_output([_get_exiftool_path(), '-json', self.filename])
meta = json.loads(out.decode('utf-8'))[0]
for key in self.meta_whitelist:
meta.pop(key, None)
return meta
def _get_exiftool_path() -> str: # pragma: no cover
exiftool_path = '/usr/bin/exiftool'
if os.path.isfile(exiftool_path):
if os.access(exiftool_path, os.X_OK):
return exiftool_path
# ArchLinux
exiftool_path = '/usr/bin/vendor_perl/exiftool'
if os.path.isfile(exiftool_path):
if os.access(exiftool_path, os.X_OK):
return exiftool_path
raise RuntimeError("Unable to find exiftool")
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