/usr/share/pyshared/imposm/parser/util.py is in python-imposm-parser 1.0.3-1.
This file is owned by root:root, with mode 0o644.
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1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 | # Copyright 2011 Omniscale GmbH & Co. KG
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import contextlib
import multiprocessing
import subprocess
try:
from setproctitle import setproctitle
setproctitle
except ImportError:
setproctitle = lambda x: None
def default_concurrency():
return multiprocessing.cpu_count()
def bzip_reader(filename):
p = subprocess.Popen(['bunzip2', '-c', filename], bufsize=-1, stdout=subprocess.PIPE)
return p.stdout
@contextlib.contextmanager
def fileinput(filename):
if filename.endswith('bz2'):
yield bzip_reader(filename)
else:
fh = open(filename, 'rb')
yield fh
fh.close()
def estimate_records(files):
records = 0
for f in files:
fsize = os.path.getsize(f)
if f.endswith('.bz2'):
fsize *= 11 # observed bzip2 compression factor on osm data
if f.endswith('.pbf'):
fsize *= 15 # observed pbf compression factor on osm data
records += fsize/200
return int(records)
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