gstreamer/scripts/git-hooks/pre-commit-python.hook

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#!/usr/bin/env python3
import os
import subprocess
import sys
import tempfile
NOT_PYCODESTYLE_COMPLIANT_MESSAGE_PRE = \
"Your code is not fully pycodestyle compliant and contains"\
" the following coding style issues:\n\n"
NOT_PYCODESTYLE_COMPLIANT_MESSAGE_POST = \
"Please fix these errors and commit again, you can do so "\
"from the root directory automatically like this, assuming the whole "\
"file is to be commited:"
NO_PYCODESTYLE_MESSAGE = \
"You should install the pycodestyle style checker to be able"\
" to commit in this repo.\nIt allows us to garantee that "\
"anything that is commited respects the pycodestyle coding style "\
"standard.\nYou can install it:\n"\
" * on ubuntu, debian: $sudo apt-get install pycodestyle \n"\
" * on fedora: #yum install python3-pycodestyle \n"\
" * on arch: #pacman -S python-pycodestyle \n"\
" * or `pip install --user pycodestyle`"
def system(*args, **kwargs):
kwargs.setdefault('stdout', subprocess.PIPE)
proc = subprocess.Popen(args, **kwargs)
out, err = proc.communicate()
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if isinstance(out, bytes):
out = out.decode()
return out
def copy_files_to_tmp_dir(files):
tempdir = tempfile.mkdtemp()
for name in files:
filename = os.path.join(tempdir, name)
filepath = os.path.dirname(filename)
if not os.path.exists(filepath):
os.makedirs(filepath)
with open(filename, 'w') as f:
system('git', 'show', ':' + name, stdout=f)
return tempdir
def main():
modified_files = system('git', 'diff-index', '--cached',
'--name-only', 'HEAD', '--diff-filter=ACMR').split("\n")[:-1]
non_compliant_files = []
output_message = None
for modified_file in modified_files:
try:
if not modified_file.endswith(".py"):
continue
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pycodestyle_errors = system('pycodestyle', '--repeat', '--ignore', 'E402,E501,E128,W605,W503', modified_file)
if pycodestyle_errors:
if output_message is None:
output_message = NOT_PYCODESTYLE_COMPLIANT_MESSAGE_PRE
output_message += pycodestyle_errors
non_compliant_files.append(modified_file)
except OSError as e:
output_message = NO_PYCODESTYLE_MESSAGE
break
if output_message:
print(output_message)
if non_compliant_files:
print(NOT_PYCODESTYLE_COMPLIANT_MESSAGE_POST)
for non_compliant_file in non_compliant_files:
print("autopep8 -i ", non_compliant_file, "; git add ",
non_compliant_file)
print("git commit")
sys.exit(1)
if __name__ == '__main__':
main()