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- import os
- import logging
- import shutil
- import random
- from tempfile import mkstemp
- import fnmatch
- def scan_dir(dirname, extension=None):
- if extension is None:
- extension = '*'
- for root, dirnames, filenames in os.walk(dirname):
- for fname in fnmatch.filter(filenames, extension):
- yield os.path.join(root, fname)
- def generate(spec):
- '''
- resolves audiospec-randomdir
- Recognized arguments:
- - paths [mandatory] list of source paths
- - howmany [default=1] number of audio files to pick
- '''
- spec.setdefault('howmany', 1)
- for attr in ('paths', ):
- if attr not in spec:
- raise ValueError("Malformed audiospec: missing '%s'" % attr)
- found_files = set()
- for path in spec['paths']:
- if not os.path.exists(path):
- logging.warn("Can't find requested path: %s" % path)
- continue
- if os.path.isfile(path):
- found_files.add(path)
- elif os.path.isdir(path):
- found_files.update(scan_dir(path))
- picked = random.sample(found_files, int(spec['howmany']))
- for path in picked:
- tmp = mkstemp(suffix=os.path.splitext(path)[-1],
- prefix='audiogen-randomdir-')
- os.close(tmp[0])
- shutil.copy(path, tmp[1])
- yield 'file://{}'.format(tmp[1])
- generate.description = 'Picks random files from a specified directory'
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