import os

import time

# work around check-code complains

#

# This is a simple log level module doing simple test related work, we can't

# import more things, and we do not need it.

environ = getattr(os, 'environ')

def _timeout_factor():

    """return the current modification to timeout"""

    default = int(environ.get('HGTEST_TIMEOUT_DEFAULT', 360))

    current = int(environ.get('HGTEST_TIMEOUT', default))

    if current == 0:

        return 1

    return current / float(default)

def wait_file(path, timeout=10):

    timeout *= _timeout_factor()

    start = time.time()

    while not os.path.exists(path):

        if timeout and time.time() - start > timeout:

            raise RuntimeError(b"timed out waiting for file: %s" % path)

        time.sleep(0.01)

def write_file(path, content=b''):

    if content:

        write_path = b'%s.tmp' % path

    else:

        write_path = path

    with open(write_path, 'wb') as f:

        f.write(content)

    if path != write_path:

        os.rename(write_path, path)