pre-commit

#!/usr/bin/env python
# -*- coding: utf-8 -*-
#
# For Mac OS X's users:
# git clone [email protected]:int3h/SublimeFixPath.git \
# ~/Library/Application\ Support/Sublime\ Text\ 3/Packages/FixMacPath
#

import sys
import pep8
import io
import os.path
import subprocess


try:
    import pyflakes.api
except ImportError as e:
    print("!!!!  pip3 install pyflakes && pip install pyflakes !!!!")
    raise


def validate_py(filename, contents):
    result = pyflakes.api.checkPath(filename=filename)
    lines = io.StringIO(contents).readlines()
    result_pep8 = pep8.Checker(
        filename=filename,
        lines=lines,
        ignore=["E711", "E712"],
        max_line_length=99,
        show_sources=True)
    return not result and not result_pep8.check_all()


def validate_js(filename, contents):
    proc = subprocess.Popen(["./node_modules/.bin/gulp", "jscs-stdin"],
                            stdin=subprocess.PIPE, cwd="front")
    proc.communicate(contents.encode("utf-8"))
    proc.stdin.close()
    if proc.wait():
        return False
    proc = subprocess.Popen(["./node_modules/.bin/gulp", "eslint-stdin"],
                            stdin=subprocess.PIPE, cwd="front")
    proc.communicate(contents.encode("utf-8"))
    proc.stdin.close()
    if proc.wait():
        return False
    return True


def validate_json(filename, contents):
    return True


def validate_yml(filename, contents):
    return True


def validate_styl(filename, contents):
    return True


checks = {
    ".py": validate_py,
    ".js": validate_js,
#    ".jsx": validate_js,
#    ".json": validate_json,
#    ".yml": validate_yml,
#    ".styl": validate_styl
}


def read_staged(filename):
    path = ":./" + filename
    try:
        return subprocess.check_output(["git", "cat-file", "-p", path],
                                       stderr=subprocess.PIPE).decode("utf-8")
    except subprocess.CalledProcessError:
        return None


def hook():
    last = "HEAD"
    if subprocess.call(["git", "rev-parse", "--verify", "HEAD"],
                       stdout=subprocess.PIPE, stderr=subprocess.PIPE):
        last = "4b825dc642cb6eb9a060e54bf8d69288fbee4904"
    lines = subprocess.check_output(["git", "diff-index", last,
                                     "--cached", "--name-only"])
    valid = True
    for filename in filter(None, lines.decode().split("\n")):
        _, ext = os.path.splitext(filename)
        if ext in checks:
            contents = read_staged(filename)
            if contents is None:
                continue
            if not checks[ext](filename, contents):
                print("%s failed to validate" % filename)
                valid = False
    if not valid:
        sys.exit(-1)


if __name__ == "__main__":
    hook()