pre-commit

#!/usr/bin/env python

import os
import re
import subprocess
import sys

modified = re.compile('^(?:M|A)(\s+)(?P<name>.*)')

CHECKS = [
    {
        'output': 'Checking for conflict markers...',
        'command': 'grep -n -E "(<<<<<<<|>>>>>>>)" %s',
        'print_filename': True,
    },
    {
        'output': 'Checking for pdbs...',
        'command': 'grep -n "import pdb" %s',
        'print_filename': True,
    },
    {
        'output': 'Checking for bpdbs...',
        'command': 'grep -n "import bpdb" %s',
        'print_filename': True,
    },
    {
        'output': 'Checking for ipdbs...',
        'command': 'grep -n "import ipdb" %s',
        'print_filename': True,
    },
    {
        'output': 'Checking for print statements...',
        'command': 'grep -n print %s',
        'match_files': ['.*\.py$'],
        'print_filename': True,
    },
    {
        'output': 'Running flake8...',
        'command': 'flake8 %s',
        'match_files': ['.*\.py$'],
        'print_filename': False,
    },
]


def matches_file(file_name, match_files):
    return any(re.compile(match_file).match(file_name)
               for match_file in match_files)


def check_files(files, check):
    result = 0
    print check['output']
    for file_name in files:
        if not 'match_files' in check or matches_file(file_name,
                                                      check['match_files']):
            if not ('ignore_files' in check and
                    matches_file(file_name, check['ignore_files'])):
                process = subprocess.Popen(check['command'] % file_name,
                                           stdout=subprocess.PIPE,
                                           stderr=subprocess.PIPE, shell=True)
                out, err = process.communicate()
                if out or err:
                    if check['print_filename']:
                        prefix = '\t%s:' % file_name
                    else:
                        prefix = '\t'
                    output_lines = ['%s%s' % (prefix, line)
                                    for line in out.splitlines()]
                    print '\n'.join(output_lines)
                    if err:
                        print err
                    result = 1
    return result


def main(all_files):
    # Stash any changes to the working tree that are not going to be committed
    subprocess.call(['git', 'stash', '-u', '--keep-index'],
                    stdout=subprocess.PIPE)

    files = []
    if all_files:
        for root, dirs, file_names in os.walk('.'):
            for file_name in file_names:
                files.append(os.path.join(root, file_name))
    else:
        p = subprocess.Popen(['git', 'status', '--porcelain'],
                             stdout=subprocess.PIPE)
        out, err = p.communicate()
        for line in out.splitlines():
            match = modified.match(line)
            if match:
                files.append(match.group('name'))

    result = 0

    print 'Running unit tests...'
    return_code = subprocess.call('cd ingqueue && make test', shell=True)
    result = return_code or result

    for check in CHECKS:
        result = check_files(files, check) or result

    # Unstash changes to the working tree that we had stashed
    subprocess.call(['git', 'reset', '--hard'], stdout=subprocess.PIPE,
                    stderr=subprocess.PIPE)
    subprocess.call(['git', 'stash', 'pop', '--quiet', '--index'],
                    stdout=subprocess.PIPE, stderr=subprocess.PIPE)
    sys.exit(result)


if __name__ == '__main__':
    all_files = False
    if len(sys.argv) > 1 and sys.argv[1] == '--all-files':
        all_files = True
    main(all_files)