def unpack_file_cond(self, pred, target_dir, archive_root=''):
"""Unpack/Extract files according to predicate function
pred: filename -> bool
unpacks stuff into target_dir and only extracts files
from archive_root, treating it as the archive root"""
zip_obj = self.zip_obj
for info in zip_obj.infolist():
if pred(info.filename): # check if condition holds
# below code removes that, so we find it here
is_dir = info.filename.endswith('/')
# calculate output file name
if archive_root == '':
outpath = info.filename
else:
# change archive_root
if util.subpath(archive_root, info.filename):
outpath = util.removepathprefix(archive_root,
info.filename)
else:
continue # don't extract if not under
ofile = os.path.join(target_dir, outpath)
if is_dir: # this is a directory
if not os.path.isdir(ofile):
os.makedirs(ofile)
perm = info.external_attr
perm &= 0xFFFF0000
perm >>= 16
perm |= 0x00000100
os.chmod(ofile, perm)
continue
# check that output dir is present
util.ensure_dirs(os.path.dirname(ofile))
# remove output file we might be overwriting.
# (also check for islink? for broken symlinks...)
if os.path.isfile(ofile) or os.path.islink(ofile):
os.remove(ofile)
if info.external_attr == self.symmagic:
if os.path.isdir(ofile):
# A rare case, the file used to be a dir,
# now it is a symlink!
shutil.rmtree(ofile)
target = zip_obj.read(info.filename)
os.symlink(target, ofile)
else:
perm = info.external_attr
perm &= 0x08FF0000
perm >>= 16
perm |= 0x00000100
info.filename = outpath
zip_obj.extract(info, target_dir)
os.chmod(ofile, perm)
def extract_file_synced(self, path, outdir):
"""Extract file with path to outdir"""
data = self.impl.read_file(path)
fpath = util.join_path(outdir, path)
util.ensure_dirs(os.path.dirname(fpath))
with open(fpath, "wb") as f:
f.write(data)
f.flush()
os.fsync(f.fileno())