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

   1 #!/usr/bin/env python3
   2 import os
   3 import subprocess
   4 import sys
   5 import tempfile
   6
   7 NOT_PYCODESTYLE_COMPLIANT_MESSAGE_PRE = \
   8     "Your code is not fully pycodestyle compliant and contains"\
   9     " the following coding style issues:\n\n"
  10
  11 NOT_PYCODESTYLE_COMPLIANT_MESSAGE_POST = \
  12     "Please fix these errors and commit again, you can do so "\
  13     "from the root directory automatically like this, assuming the whole "\
  14     "file is to be commited:"
  15
  16 NO_PYCODESTYLE_MESSAGE = \
  17     "You should install the pycodestyle style checker to be able"\
  18     " to commit in this repo.\nIt allows us to garantee that "\
  19     "anything that is commited respects the pycodestyle coding style "\
  20     "standard.\nYou can install it:\n"\
  21     "  * on ubuntu, debian: $sudo apt-get install pycodestyle \n"\
  22     "  * on fedora: #yum install python3-pycodestyle \n"\
  23     "  * on arch: #pacman -S python-pycodestyle \n"\
  24     "  * or `pip install --user pycodestyle`"
  25
  26
  27 def system(*args, **kwargs):
  28     kwargs.setdefault('stdout', subprocess.PIPE)
  29     proc = subprocess.Popen(args, **kwargs)
  30     out, err = proc.communicate()
  31     if isinstance(out, bytes):
  32         out = out.decode()
  33     return out
  34
  35
  36 def copy_files_to_tmp_dir(files):
  37     tempdir = tempfile.mkdtemp()
  38     for name in files:
  39         filename = os.path.join(tempdir, name)
  40         filepath = os.path.dirname(filename)
  41         if not os.path.exists(filepath):
  42             os.makedirs(filepath)
  43         with open(filename, 'w') as f:
  44             system('git', 'show', ':' + name, stdout=f)
  45
  46     return tempdir
  47
  48
  49 def main():
  50     modified_files = system('git', 'diff-index', '--cached',
  51                             '--name-only', 'HEAD', '--diff-filter=ACMR').split("\n")[:-1]
  52     non_compliant_files = []
  53     output_message = None
  54
  55     for modified_file in modified_files:
  56         try:
  57             if not modified_file.endswith(".py"):
  58                 continue
  59             pycodestyle_errors = system('pycodestyle', '--repeat', '--ignore', 'E402,E501,E128,W605,W503', modified_file)
  60             if pycodestyle_errors:
  61                 if output_message is None:
  62                     output_message = NOT_PYCODESTYLE_COMPLIANT_MESSAGE_PRE
  63                 output_message += pycodestyle_errors
  64                 non_compliant_files.append(modified_file)
  65         except OSError as e:
  66             output_message = NO_PYCODESTYLE_MESSAGE
  67             break
  68
  69     if output_message:
  70         print(output_message)
  71         if non_compliant_files:
  72             print(NOT_PYCODESTYLE_COMPLIANT_MESSAGE_POST)
  73             for non_compliant_file in non_compliant_files:
  74                 print("autopep8 -i --max-line-length 120", non_compliant_file, "; git add ",
  75                       non_compliant_file)
  76             print("git commit")
  77         sys.exit(1)
  78
  79
  80 if __name__ == '__main__':
  81     main()