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#!/usr/bin/python
# This file is a part of the OpenSurgSim project.
# Copyright 2012-2013, SimQuest Solutions Inc.
#
# 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.
"""Remove all trailing whitespace from a file.
Typical usage:
Tools/remove-trailing-whitespace.py Foo.h
or:
find SurgSim \( -name '*.h' -o -name '*.cpp' \) -print \
| xargs python Tools/remove-trailing-whitespace.py
"""
import argparse
import sys
import re
def slurp_raw_lines(file):
try:
with open(file, 'rb') as f:
return f.readlines()
except IOError as e:
print >> sys.stderr, e
return None
def spew_raw_lines(file, lines):
try:
with open(file, 'wb') as f:
for line in lines:
f.write(line)
return True
except IOError as e:
print >> sys.stderr, e
return False
def update(file, lines):
if lines is None:
return None
eol = "\n"
if len(lines) and re.search(r'\r\n$', lines[0]):
eol = "\r\n"
result = map(lambda x: x.rstrip() + eol, lines)
# If the trailing newline was missing, but there's no other trailing
# whitespace, leave well enough alone.
if len(lines) and lines[-1] == lines[-1].rstrip():
result[-1] = lines[-1]
if result == lines:
return None
return result
if __name__ == '__main__':
parser = argparse.ArgumentParser(
description="Remove all trailing whitespace from a file.")
parser.add_argument('files', metavar='FILE', nargs='*',
help='The file names to modify.')
args = parser.parse_args()
touched = False
for file in args.files:
lines = update(file, slurp_raw_lines(file))
if lines is not None:
spew_raw_lines(file, lines)
print "Updated", file
touched = True
if not touched:
print "{}: Nothing to update!".format(sys.argv[0])
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