.git-pre-commit

#!/usr/bin/env python

# This gets executed on 'git commit' and rejects the commit in case the
# submitted code does not pass validation.
# Install it with "make install-git-hooks"

import os
import subprocess
import sys


def main():
    out = subprocess.check_output("git diff --cached --name-only", shell=True)
    files = [x for x in out.split('\n') if x.endswith('.py') and
             os.path.exists(x)]

    for path in files:
        with open(path) as f:
            data = f.read()

        # pdb
        if "pdb.set_trace" in data:
            for lineno, line in enumerate(data.split('\n'), 1):
                line = line.rstrip()
                if "pdb.set_trace" in line:
                    print("%s: %s" % (lineno, line))
                    sys.exit(
                        "commit aborted: you forgot a pdb in your python code")

        # bare except clause
        if "except:" in data:
            for lineno, line in enumerate(data.split('\n'), 1):
                line = line.rstrip()
                if "except:" in line and not line.endswith("# NOQA"):
                    print("%s: %s" % (lineno, line))
                    sys.exit("commit aborted: bare except clause")

    # flake8
    failed = False
    for path in files:
        ret = subprocess.call("python -m flake8 %s" % path, shell=True)
        if ret != 0:
            failed = True
    if failed:
        sys.exit("commit aborted: python code is not flake8-compliant")

main()